I have this student class in model package in my model pacakage it has userid which refrences the userid in user class
#Entity
#Table(name = "student")
public class Student {
#Id
#Column(name = "Libraryid")
private int libraryid;
#Column(name = "Stdphone")
private String phoneno;
#Column(name = "stdmail")
private String studentmail;
#Column(name = "address")
private String address;
#Column(name = "academicsid")
private int academicid;
#Column(name = "user_userid", nullable = true)
private int userid;
#Column(name = "stdname")
private String studentname;
public String getStudentname() {
return studentname;
}
public void setStudentname(String studentname) {
this.studentname = studentname;
}
public int getLibraryid() {
return libraryid;
}
public void setLibraryid(int libraryid) {
this.libraryid = libraryid;
}
public String getPhoneno() {
return phoneno;
}
public void setPhoneno(String phoneno) {
this.phoneno = phoneno;
}
public String getStudentmail() {
return studentmail;
}
public void setStudentmail(String studentmail) {
this.studentmail = studentmail;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getAcademicid() {
return academicid;
}
public void setAcademicid(int academicid) {
this.academicid = academicid;
}
public int getUserid() {
return userid;
}
public void setUserid(int userid) {
this.userid = userid;
}
}
This is the jsp file for adding the student in the database but i have not put the userid because i want to enter when signup student for the system
<body>
<form:form method="post" modelAttribute="student" action="admin">
<table>
<tr>
<td><form:label path="libraryid">libraryid</form:label></td>
<td><form:input path="libraryid" /></td>
</tr>
<tr>
<td><form:label path="studentname">Name</form:label></td>
<td><form:input path="studentname" /></td>
</tr>
<tr>
<td><form:label path="phoneno">phoneno</form:label></td>
<td><form:input path="phoneno" /></td>
</tr>
<tr>
<td><form:label path="studentmail">studentmail</form:label></td>
<td><form:input path="studentmail" /></td>
</tr>
<tr>
<td><form:label path="academicid">academicid</form:label></td>
<td><form:input path="academicid" /></td>
</tr>
<tr>
<td><input type="submit" value="Save"></td>
</tr>
</table>
</form:form>
In the controller package in the admincontroller class i have this :
#RequestMapping(value = "/admin", method = RequestMethod.POST)
public String saveStudent(#ModelAttribute Student student) {
sDao.addStudent(student);
return "home";
}
And i have this error
message Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: Cannot add or update a child row: a foreign key constraint fails (`sunwaylib`.`student`, CONSTRAINT `fk_student_user` FOREIGN KEY (`user_userid`) REFERENCES `user` (`Userid`) ON DELETE SET NULL ON UPDATE CASCADE); SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`sunwaylib`.`student`, CONSTRAINT `fk_student_user` FOREIGN KEY (`user_userid`) REFERENCES `user` (`Userid`) ON DELETE SET NULL ON UPDATE CASCADE)
although I have set the database allow null valueenter image description here
Related
Here is my JSP page:
<c:url var="productSave" value="/admin/products/emi.html" />
<form:form method="Post" action="${productSave}"
modelAttribute="intrest">
<table>
<tr>
<td>Id :</td>
<td><form:input path="financerId" /></td>
</tr>
<tr>
<td>downpayment :</td>
<td><form:input path="downpayment" /></td>
</tr>
<tr>
<td>months :</td>
<td><form:input path="months" /></td>
</tr>
<tr>
<td>intrest :</td>
<td><form:input path="intrest" /></td>
</tr>
<tr>
<td></td>
<td><input onclick="self.close()" type="submit" value="Save" /></td>
</tr>
</table>
</form:form>
Here I am taking intrest field as double in model bean. but when i try to save the entity it throws
Failed to convert value of type 'java.lang.String' to required type 'com.salesmanager.core.model.catalog.product.relationship.FinancerRateofIntrest'; nested exception is org.springframework.core.convert.ConversionFailedException
Controller :
#RequestMapping(value = "/admin/products/emi.html", method = RequestMethod.POST)
public String GetEmiOption(#Valid #ModelAttribute("intrest") FinancerRateofIntrest intrest, Model model, HttpServletRequest request, HttpServletResponse response) throws Exception {
rateofintrest.save(intrest);
return "admin-products-emi";
}
Entity class:
#Entity
#Table(name = "FinancerRateofIntrest", schema = SchemaConstant.SALESMANAGER_SCHEMA)
public class FinancerRateofIntrest extends SalesManagerEntity<Long, FinancerRateofIntrest> {
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
#Column(name = "ID", unique = true, nullable = false)
#TableGenerator(name = "TABLE_GEN", table = "SM_SEQUENCER", pkColumnName = "SEQ_NAME", valueColumnName = "SEQ_COUNT", pkColumnValue = "PRODUCT_RELATION_SEQ_NEXT_VAL")
#GeneratedValue(strategy = GenerationType.TABLE, generator = "TABLE_GEN")
private Long id;
private int financerId;
private String downpayment;
private String months;
private Double intrest;
public Double getIntrest() {
return intrest;
}
public void setIntrest(Double intrest) {
this.intrest = intrest;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public int getFinancerId() {
return financerId;
}
public void setFinancerId(int financerId) {
this.financerId = financerId;
}
public String getDownpayment() {
return downpayment;
}
public void setDownpayment(String downpayment) {
this.downpayment = downpayment;
}
public String getMonths() {
return months;
}
public void setMonths(String months) {
this.months = months;
}
}
You are using same name for object and variable inside it.
Change varibale name of modelAttribute from intrest to something else like financerRateofIntrest in :
<form:form method="Post" action="${productSave}" modelAttribute="financerRateofIntrest">
And
#RequestMapping(value = "/admin/products/emi.html", method = RequestMethod.POST)
public String GetEmiOption(#Valid #ModelAttribute("financerRateofIntrest") FinancerRateofIntrest intrest, Model model, HttpServletRequest request, HttpServletResponse response) throws Exception {
rateofintrest.save(intrest);
return "admin-products-emi";
}
Also, from controller method where you return your jsp page.
i am learning spring mvc right now and I am facing with a question. I have two objects Country and Capital. What I am trying to accomplish is when I created an new country in the jsp I would like to create an new capital along with it (country name , population, and capital name will be enter by user). I am not sure how to retrieve the Capital object and how to pass it to my controllers. Please explain. Thanks!!
Country.java
#Entity
#Table(name="COUNTRY")
public class Country{
#Id
#Column(name="id")
#GeneratedValue(strategy=GenerationType.IDENTITY)
int id;
#Column(name="countryName")
String countryName;
#Column(name="population")
long population;
#OneToOne
#JoinColumn(name="capitalId")
Capital capital;
public Country() {
super();
}
public Country(int i, String countryName,long population) {
super();
this.id = i;
this.countryName = countryName;
this.population=population;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCountryName() {
return countryName;
}
public void setCountryName(String countryName) {
this.countryName = countryName;
}
public long getPopulation() {
return population;
}
public void setPopulation(long population) {
this.population = population;
}
public Capital getCapital() {
return capital;
}
public void setCapital(Capital capital) {
this.capital = capital;
}
}
Capital.java
#Entity
#Table(name="CAPITAL")
public class Capital {
#Id #GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="id")
private int id;
#Column(name="capitalName")
private String capitalname;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCapitalname() {
return capitalname;
}
public void setCapitalname(String capitalname) {
this.capitalname = capitalname;
}
}
countryDetails.jsp
<form:form method="post" modelAttribute="country" action="/SpringMVCHibernateCRUDExample/addCountry">
<table>
<tr>
<th colspan="2">Add Country</th>
</tr>
<tr>
<form:hidden path="id" />
<td><form:label path="countryName">Country Name:</form:label></td>
<td><form:input path="countryName" size="30" maxlength="30"></form:input></td>
</tr>
<tr>
<td><form:label path="population">Population:</form:label></td>
<td><form:input path="population" size="30" maxlength="30"></form:input></td>
</tr>
<tr>
<td><form:label path="capital">Capital</form:label></td>
</tr>
<tr>
<td colspan="2"><input type="submit"
class="blue-button" /></td>
</tr>
</table>
</form:form>
Right now I have 3 tables in my database - Booking, Restaurant and RestaurantTable. I have a one to many mapping between Restaurant and RestaurantTable (a restaurant can have many tables, but a table can have only one restaurant). I have a file called "editRestaurant.jsp" where (among other things) I would like to display all the tables currently in the restaurant in a drop-down list. I would like to do something like I did in "newBooking.jsp":
<td><form:select path="restaurant.id">
<form:option value="" label="--- Select ---" />
<form:options items="${restaurants}" itemValue="id" itemLabel="restaurantName" />
<td><form:errors path="restaurant.id" cssClass="error"/></td>
</form:select>
The problem is, I don't know how to handle One to Many mappings, as in specifically, I don't know how to deal with the RestaurantTable set in Restaurant.java. I hope you can understand what I mean and can help me.
My Restaurant.java:
#Entity
#Table(name="restaurant")
public class Restaurant {
#Id
#Column(name="id")
#GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
#Column(name="restaurant_name")
private String restaurantName;
#Column(name="address")
private String address;
#OneToMany(mappedBy="restaurant", cascade = CascadeType.ALL)
private Set<RestaurantTable> table;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getRestaurantName() {
return restaurantName;
}
public void setRestaurantName(String restaurantName) {
this.restaurantName = restaurantName;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public Set<RestaurantTable> getTable() {
return table;
}
public void setTable(Set<RestaurantTable> table) {
this.table = table;
}
public String toString() {
return restaurantName;
}
}
My RestaurantTable.java:
#Entity
#Table(name="restaurant_table")
public class RestaurantTable {
#Id
#Column(name="id")
#GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
#Column(name="table_size")
private int tableSize;
#Column(name="table_number")
private int tableNumber;
#ManyToOne
#JoinColumn(name="restaurant_id")
private Restaurant restaurant;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public int getTableSize() {
return tableSize;
}
public void setTableSize(int tableSize) {
this.tableSize = tableSize;
}
public int getTableNumber() {
return tableNumber;
}
public void setTableNumber(int tableNumber) {
this.tableNumber = tableNumber;
}
public Restaurant getRestaurant() {
return restaurant;
}
public void setRestaurant(Restaurant restaurant) {
this.restaurant = restaurant;
}
public String toString() {
return "Table number " + tableNumber;
}
}
My current editRestaurant.jsp:
<div id="body">
<section class="content-wrapper main-content clear-fix">
<h2>Edit</h2>
<form:form modelAttribute="restaurant">
<table>
<tr>
<td>Restaurant:</td>
<td><form:input path="restaurantName" /></td>
<td><form:errors path="restaurantName" cssClass="error"/></td>
</tr>
<tr>
<td>Address:</td>
<td><form:input path="address" /></td>
<td><form:errors path="address" cssClass="error"/></td>
</tr>
<!--I want to put the list of tables here.-->
<tr>
<td colspan="3"><input type="submit" value="Submit" name="submit"/>
</td>
</tr>
</table>
</form:form>
<div>
Back to List
</div>
</section>
Any help is appreciated!
Employee Pojo Class:
#Entity
#Table(name = "Employee")
public class Employee implements Serializable {
private static final long serialVersionUID = -723583058586873479L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "empid")
private Integer empId;
#Column(name = "empname")
private String empName;
#Column(name = "empaddress")
private String empAddress;
#Column(name = "salary")
private Long salary;
#Column(name = "empAge")
private Integer empAge;
// .......................................................
#Column(name = "file_data")
private byte data;
public byte getData() {
return data;
}
public void setData(byte data) {
this.data = data;
}
// .......................................................
public Integer getEmpId() {
return empId;
}
public void setEmpId(Integer empId) {
this.empId = empId;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public String getEmpAddress() {
return empAddress;
}
public void setEmpAddress(String empAddress) {
this.empAddress = empAddress;
}
public Long getSalary() {
return salary;
}
public void setSalary(Long salary) {
this.salary = salary;
}
public Integer getEmpAge() {
return empAge;
}
public void setEmpAge(Integer empAge) {
this.empAge = empAge;
}
}
This is my Jsp Page :
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>Add Employee Data</h2>
<form:form method="POST" action="/sdnext/save.html">
<table>
<tr>
<td><form:label path="id">Employee ID:</form:label></td>
<td><form:input path="id" value="${employee.id}" readonly="true"/></td>
</tr>
<tr>
<td><form:label path="name">Employee Name:</form:label></td>
<td><form:input path="name" value="${employee.name}"/></td>
</tr>
<tr>
<td><form:label path="age">Employee Age:</form:label></td>
<td><form:input path="age" value="${employee.age}"/></td>
</tr>
<tr>
<td><form:label path="salary">Employee Salary:</form:label></td>
<td><form:input path="salary" value="${employee.salary}"/></td>
</tr>
<tr>
<td><form:label path="address">Employee Address:</form:label></td>
<td><form:input path="address" value="${employee.address}"/></td>
</tr>
<tr>
<td><form:label path="data">Upload File:</form:label></td>
<td><form:input type="file" path="data" value="${employee.data}"/></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="Submit"/></td>
</tr>
</table>
</form:form>
<c:if test="${!empty employees}">
<h2>List Employees</h2>
<table align="left" border="1">
<tr>
<th>Employee ID</th>
<th>Employee Name</th>
<th>Employee Age</th>
<th>Employee Salary</th>
<th>Employee Address</th>
<th>Employee Pic</th>
<th>Actions on Row</th>
</tr>
<c:forEach items="${employees}" var="employee">
<tr>
<td><c:out value="${employee.id}"/></td>
<td><c:out value="${employee.name}"/></td>
<td><c:out value="${employee.age}"/></td>
<td><c:out value="${employee.salary}"/></td>
<td><c:out value="${employee.address}"/></td>
<td><c:out value="${employee.address}"/></td>
<td><c:out value="${employee.data}"/></td>
<td align="center">Edit | Delete</td>
</tr>
</c:forEach>
</table>
</c:if>
</body>
</html>
This is my Controller Class:
#Controller
public class EmployeeController {
#Autowired
private EmployeeService employeeService;
#RequestMapping(value = "/save", method = RequestMethod.POST)
public ModelAndView saveEmployee(
#ModelAttribute("command") EmployeeBean employeeBean,
BindingResult result) {
Employee employee = prepareModel(employeeBean);
employeeService.addEmployee(employee);
return new ModelAndView("redirect:/add.html");
}
#RequestMapping(value = "/employees", method = RequestMethod.GET)
public ModelAndView listEmployees() {
Map<String, Object> model = new HashMap<String, Object>();
model.put("employees",
prepareListofBean(employeeService.listEmployeess()));
return new ModelAndView("employeesList", model);
}
#RequestMapping(value = "/add", method = RequestMethod.GET)
public ModelAndView addEmployee(
#ModelAttribute("command") EmployeeBean employeeBean,
BindingResult result) {
Map<String, Object> model = new HashMap<String, Object>();
model.put("employees",
prepareListofBean(employeeService.listEmployeess()));
return new ModelAndView("addEmployee", model);
}
#RequestMapping(value = "/search", method = RequestMethod.GET)
public ModelAndView SearchEmployee(
#ModelAttribute("command") EmployeeBean employeeBean,
BindingResult result) {
Map<String, Object> model = new HashMap<String, Object>();
model.put("employee", prepareEmployeeBean(employeeService
.getEmployeebyName("Sunil Kumar")));
// model.put("employee", prepareEmployeeBean(employeeService
// .getEmployeebyName(employeeBean.getName())));
model.put("employees",
prepareListofBean(employeeService.GetRowEmployeess1()));
return new ModelAndView("SearchEmp", model);
}
#RequestMapping(value = "/index", method = RequestMethod.GET)
public ModelAndView welcome() {
return new ModelAndView("index");
}
#RequestMapping(value = "/delete", method = RequestMethod.GET)
public ModelAndView editEmployee(
#ModelAttribute("command") EmployeeBean employeeBean,
BindingResult result) {
employeeService.deleteEmployee(prepareModel(employeeBean));
Map<String, Object> model = new HashMap<String, Object>();
model.put("employee", null);
model.put("employees",
prepareListofBean(employeeService.listEmployeess()));
return new ModelAndView("addEmployee", model);
}
#RequestMapping(value = "/edit", method = RequestMethod.GET)
public ModelAndView deleteEmployee(
#ModelAttribute("command") EmployeeBean employeeBean,
BindingResult result) {
Map<String, Object> model = new HashMap<String, Object>();
model.put("employee", prepareEmployeeBean(employeeService
.getEmployee(employeeBean.getId())));
model.put("employees",
prepareListofBean(employeeService.listEmployeess()));
return new ModelAndView("addEmployee", model);
}
private Employee prepareModel(EmployeeBean employeeBean) {
Employee employee = new Employee();
employee.setEmpAddress(employeeBean.getAddress());
employee.setEmpAge(employeeBean.getAge());
employee.setEmpName(employeeBean.getName());
employee.setSalary(employeeBean.getSalary());
employee.setEmpId(employeeBean.getId());
employeeBean.setId(null);
return employee;
}
private List<EmployeeBean> prepareListofBean(List<Employee> employees) {
List<EmployeeBean> beans = null;
if (employees != null && !employees.isEmpty()) {
beans = new ArrayList<EmployeeBean>();
EmployeeBean bean = null;
for (Employee employee : employees) {
bean = new EmployeeBean();
bean.setName(employee.getEmpName());
bean.setId(employee.getEmpId());
bean.setAddress(employee.getEmpAddress());
bean.setSalary(employee.getSalary());
bean.setAge(employee.getEmpAge());
bean.setData(employee.getData());
beans.add(bean);
}
}
return beans;
}
public EmployeeBean getEmployeenamesa(Employee employee) {
EmployeeBean bean = new EmployeeBean();
bean.setName(employee.getEmpName());
bean.setId(employee.getEmpId());
bean.setAddress(employee.getEmpAddress());
bean.setSalary(employee.getSalary());
bean.setAge(employee.getEmpAge());
bean.setData(employee.getData());
return bean;
}
private EmployeeBean prepareEmployeeBean(Employee employee) {
EmployeeBean bean = new EmployeeBean();
bean.setAddress(employee.getEmpAddress());
bean.setAge(employee.getEmpAge());
bean.setName(employee.getEmpName());
bean.setSalary(employee.getSalary());
bean.setData(employee.getData());
bean.setId(employee.getEmpId());
return bean;
}
}
This is my Employee Bean class :
public class EmployeeBean {
private Integer id;
private String name;
private Integer age;
private Long salary;
private String address;
// ........................................................
private byte data;
public byte getData() {
return data;
}
public void setData(byte data) {
this.data = data;
}
// .......................................................
public Long getSalary() {
return salary;
}
public void setSalary(Long salary) {
this.salary = salary;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
I am trying to add image in Data Base i have field file_data why longblob but when i try to get file from my local machine and try to upload image then i am getting null Can not set byte field Employee.data to null value i don't know where am doing mistake while i have set all value if we remove data from file then i am able to save data and get data from database i am having Problem only with file part please suggest me where am doing wrong
You cannot have a byte for the File upload. You need to use the MultipartFile/byte[] for that.
Refer this link for more info .
Using Multipart : http://www.ioncannon.net/programming/975/spring-3-file-upload-example/
For JPA entity, you need to annotate with #Lob annotation
I have a table for which I am passing list of student objects from my spring controller method, On page load 3 rows are populated. I want the user to be able to add more rows delete existing rows on button click. Can anyone tell me how to achieve this. See below my controller and jsp code. On clicking add I want to add 3 more rows selecting check box and clicking delete row should delete the row. i want the the added columns to be binded
I am very new to jQuery is this possible without jQuery. If not please tell me in detail how to achieve this using jQuery
Student Entity
#Entity
#Table(name="STUDENT_REGISTRATION")
public class Student {
private int studentId;
private String firstName;
private String lastName;
private Date dob;
private String sex;
private String status;
private Date doj;
private int deptId;
private String deptName;
private int batchId;
private String batchName;
private int roleId;
private String roleName;
private String regNo;
public Student(){
}
public Student(int studentId, String firstName, String lastName, Date dob,
String sex, String status, Date doj, int deptId,
String deptName, int batchId, String batchName, int roleId,
String roleName, String regNo) {
super();
this.studentId = studentId;
this.firstName = firstName;
this.lastName = lastName;
this.dob = dob;
this.sex = sex;
this.status = status;
this.doj = doj;
this.deptId = deptId;
this.deptName = deptName;
this.batchId = batchId;
this.batchName = batchName;
this.roleId = roleId;
this.roleName = roleName;
this.regNo = regNo;
}
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="STUDENT_ID")
public int getStudentId() {
return studentId;
}
public void setStudentId(int studentId) {
this.studentId = studentId;
}
#Column(name="STUDENT_FIRST_NAME")
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
#Column(name="STUDENT_LAST_NAME")
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
#Column(name="DOB")
public Date getDob() {
return dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
#Column(name="SEX")
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
#Column(name="STATUS")
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
#Column(name="DOJ")
public Date getDoj() {
return doj;
}
public void setDoj(Date doj) {
this.doj = doj;
}
#Column(name="DEPT_ID")
public int getDeptId() {
return deptId;
}
public void setDeptId(int deptId) {
this.deptId = deptId;
}
#Column(name="DEPT_NAME")
public String getDeptName() {
return deptName;
}
public void setDeptName(String deptName) {
this.deptName = deptName;
}
#Column(name="BATCH_ID")
public int getBatchId() {
return batchId;
}
public void setBatchId(int batchId) {
this.batchId = batchId;
}
#Column(name="BATCH_NAME")
public String getBatchName() {
return batchName;
}
public void setBatchName(String batchName) {
this.batchName = batchName;
}
#Column(name="ROLE_ID")
public int getRoleId() {
return roleId;
}
public void setRoleId(int roleId) {
this.roleId = roleId;
}
#Column(name="ROLE_NAME")
public String getRoleName() {
return roleName;
}
public void setRoleName(String roleName) {
this.roleName = roleName;
}
#Column(name="REG_NO")
public String getRegNo() {
return regNo;
}
public void setRegNo(String regNo) {
this.regNo = regNo;
}
}
Student DTO
public class StudentDTO {
private int studentId;
private String firstName;
private String lastName;
private Date dob;
private String sex;
private String status;
private Date doj;
private int deptId;
private String deptName;
private int batchId;
private String batchName;
private int roleId;
private String roleName;
boolean select;
private String regNo;
public StudentDTO(){
}
public StudentDTO(int studentId, String firstName, String lastName,
Date dob, String sex, String status, Date doj, int deptId,
String deptName, int batchId, String batchName, int roleId,
String roleName, boolean select, String regNo) {
super();
this.studentId = studentId;
this.firstName = firstName;
this.lastName = lastName;
this.dob = dob;
this.sex = sex;
this.status = status;
this.doj = doj;
this.deptId = deptId;
this.deptName = deptName;
this.batchId = batchId;
this.batchName = batchName;
this.roleId = roleId;
this.roleName = roleName;
this.select = select;
this.regNo = regNo;
}
public int getStudentId() {
return studentId;
}
public void setStudentId(int studentId) {
this.studentId = studentId;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Date getDob() {
return dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public Date getDoj() {
return doj;
}
public void setDoj(Date doj) {
this.doj = doj;
}
public int getDeptId() {
return deptId;
}
public void setDeptId(int deptId) {
this.deptId = deptId;
}
public String getDeptName() {
return deptName;
}
public void setDeptName(String deptName) {
this.deptName = deptName;
}
public int getBatchId() {
return batchId;
}
public void setBatchId(int batchId) {
this.batchId = batchId;
}
public String getBatchName() {
return batchName;
}
public void setBatchName(String batchName) {
this.batchName = batchName;
}
public int getRoleId() {
return roleId;
}
public void setRoleId(int roleId) {
this.roleId = roleId;
}
public String getRoleName() {
return roleName;
}
public void setRoleName(String roleName) {
this.roleName = roleName;
}
public boolean isSelect() {
return select;
}
public void setSelect(boolean select) {
this.select = select;
}
public String getRegNo() {
return regNo;
}
public void setRegNo(String regNo) {
this.regNo = regNo;
}
}
Here I am adding 3 Student Objects
public List<StudentDTO> addStudentToList(){
List<StudentDTO> studentList = new ArrayList<StudentDTO>();
StudentDTO stud = new StudentDTO();
for(int i=0; i<3; i++){
studentList.add(stud);
}
return studentList;
}
Student Controller class
#RequestMapping(value="/addStudent", method=RequestMethod.GET)
public ModelAndView getStudentForm(ModelMap model)
{ List<StudentDTO> studentList = studentService.getStudentAttributesList();
//List<Integer> userIdForDropDown = userDAO.getAllUserIdForDropDown();
//model.addAttribute("userIdDropDown",userIdForDropDown);
List<String> deptList = configDAO.getDeptListForDropDown();
model.addAttribute("deptlist",deptList);
List<String> batchList = configDAO.getAllBatchForDropDrown();
model.addAttribute("batchList", batchList);
ModelAndView mav = new ModelAndView("add_student");
Student stu = new Student();
mav.getModelMap().put("add_student", stu);
StudentForm studentForm = new StudentForm();
studentForm.setStudentList(studentList);
model.addAttribute("studentForm",studentForm);
return mav;
}
#RequestMapping(value="/addStudent", method=RequestMethod.POST)
public String saveStudent(#ModelAttribute("add_student") StudentForm studenfForm, BindingResult result, SessionStatus status, ModelMap model) throws ParseException{
/*if(result.hasErrors()){
return "add_student";
}*/
List<StudentDTO> newList = (List<StudentDTO>) studenfForm.getStudentList();
List<Student> newList1 = new ArrayList<Student>();
for(StudentDTO stud:studenfForm.getStudentList()){
Student student = new Student();
student.setBatchId(stud.getBatchId());
student.setBatchName(stud.getBatchName());
student.setDeptId(stud.getDeptId());
student.setDeptName(stud.getDeptName());
SimpleDateFormat sdf = new SimpleDateFormat("DD/MM/YYYY");
Date dateWithoutTime = sdf.parse(sdf.format(new Date()));
student.setDob(stud.getDob());
student.setDoj(stud.getDoj());
student.setFirstName(stud.getFirstName());
student.setLastName(stud.getLastName());
student.setRegNo(stud.getRegNo());
student.setRoleId(stud.getRoleId());
student.setRoleName(stud.getRoleName());
student.setStatus(stud.getStatus());
student.setSex(stud.getSex());
student.setStudentId(stud.getStudentId());
newList1.add(student);
}
Integer saveStatus = studentDAO.saveStudentInfo(newList1);
//Integer res = roleDAO.saveRole(role);
if(saveStatus!=null){
status.setComplete();
model.addAttribute("savedMsg", "Student record saved Successfully.");
}
return "redirect:addStudent";
}
See my jsp page
<table bgcolor="white" width="1200" height="300" align="center" style="border-collapse: collapse;" border="1" bordercolor="#006699" >
<form:form action="addStudent" method="post" commandName="add_student" modelAttribute="studentForm">
<tr>
<td align="center" style="background-color: lightblue"><h3>Add Student</h3></td>
</tr>
<tr align="left">
<td align="left">
<input type="button" id="addrows" name="addrows" class="addperson" value="Add Rows">
<input type="button" id="removerows" class="removerows" value="Delete Rows" />
<input type="submit" value="Save" />
</td>
</tr>
<tr valign="middle" align="center">
<td align="center" valign="middle">
<table width="1200" height="200" style="border-collapse: collapse;" border="0" bordercolor="#006699" cellspacing="0" cellpadding="0">
<thead>
<tr height="1" bgcolor="lightblue">
<th colspan="1">
No
</th>
<th width="5">
Select
</th>
<th>
Reg No
</th>
<th>
First Name
</th>
<th>
Last Name
</th>
<th>
Sex
</th>
<th>
DOB
</th>
<th>
DOJ
</th>
<th>
Dept Name
</th>
<th>
Role Name
</th>
<th>
Batch Name
</th>
<th>
Status
</th>
</tr>
</thead>
<tbody>
<c:forEach var="rows" items="${studentForm.studentList}" varStatus="status">
<tr class="${status.index % 2 == 0 ? 'even' : 'odd'}" >
<td width="15">
<b>${status.count}</b>
</td>
<td width="10">
<form:checkbox path="studentList[${status.index}].select"/>
</td>
<td><form:input path="studentList[${status.index}].regNo"/></td>
<td><form:input path="studentList[${status.index}].firstName"/></td>
<td><form:input path="studentList[${status.index}].lastName"/></td>
<td><form:select path="studentList[${status.index}].sex">
<form:option value="NONE" label="--- Select ---"/>
<form:option value="M" label="Male"/>
<form:option value="F" label="Female"/>
</form:select></td>
<td><form:input path="studentList[${status.index}].dob"/></td>
<td><form:input path="studentList[${status.index}].doj"/></td>
<td><form:select path="studentList[${status.index}].deptName">
<form:option value="NONE" label="--- Select ---"/>
<form:options items="${deptlist}" />
</form:select></td>
<td><form:select path="studentList[${status.index}].roleName">
<form:option value="NONE" label="--- Select ---"/>
<form:option value="ROLE_STUDENT" label="Student"/>
<form:option value="ROLE_BATCHREP" label="Batch Rep"/>
</form:select></td>
<td><form:select path="studentList[${status.index}].batchName">
<form:option value="NONE" label="--- Select ---"/>
<form:options items="${batchList}" />
</form:select>
</td>
<td><form:select path="studentList[${status.index}].status">
<form:option value="NONE" label="--- Select ---"/>
<form:option value="E" label="Enable"/>
<form:option value="D" label="Disable"/>
</form:select></td>
</tr>
</c:forEach>
</tbody>
</table>
</td>
</tr>
<tr align="center">
<td width="100" align="center"><B>
${savedMsg}
</B>
</td>
</tr>
</form:form>
</table>
Even though this thread is older, For the benefit of others who is in need of this.
Let me explain with a minimal code and User example with firstName, email, userName and gender fields so that people won't get confused with bigger code.
Consider you are sending 3 empty users in usersList from controller this will creates 3 empty rows. If you inspect/view page source you will see
Rows(<input> tags) with different id's like list0.firstName
list1.firstName
Rows(<input> tags) with different names like list[0].firstName
list[1].firstName
Whenever form is submitted id's are not considered by server(added for only for helping client side validations), but name attribute will be interpreted as request parameter and are used to construct your modelAttribute, hence attribute names are very important while inserting rows.
Adding row
So, How to construct/append new rows?
If i submit 6 users from UI, controller should receive 6 user object from usersList. Steps to achieve the same is given below
1. Right click -> view page source. You will see rows like this(you can see *[0].* in first row and *[1].* in second row)
<tr>
<td><input id="list0.firstName" name="list[0].firstName" type="text" value=""/></td>
<td><input id="list0.email" name="list[0].email" type="text" value=""/></td>
<td><input id="list0.userName" name="list[0].userName" type="text" value=""/></td>
<td>
<span>
<input id="list0.gender1" name="list[0].gender" type="radio" value="MALE" checked="checked"/>Male
</span>
<span>
<input id="list0.gender2" name="list[0].gender" type="radio" value="FEMALE"/>Female
</span>
</td>
</tr>
<tr>
<td><input id="list1.firstName" name="list[1].firstName" type="text" value=""/></td>
<td><input id="list1.email" name="list[1].email" type="text" value=""/></td>
<td><input id="list1.userName" name="list[1].userName" type="text" value=""/></td>
<td>
<span>
<input id="list1.gender1" name="list[1].gender" type="radio" value="MALE" checked="checked"/>Male
</span>
<span>
<input id="list1.gender2" name="list[1].gender" type="radio" value="FEMALE"/>Female
</span>
</td>
</tr>
Copy first row and construct a javascript string and replace '0' with variable name index. As given in below sample
'<tr>'+
'<td><input id="list'+ index +'.firstName" name="list['+ index +'].firstName" type="text" value=""/></td>'+
'<td><input id="list'+ index +'.email" name="list['+ index +'].email" type="text" value=""/></td>'+
...
'</tr>';
Append the constructed row to the <tbody>. Rows get added in UI also on submission of form newly added rows will be received in controller.
Deleting row
Deleting row is little bit complicated, i will try to explain in easiest way
Suppose you added row0, row1, row2, row3, row4, row5
Deleted row2, row3. Do not just hide the row but remove it from the
DOM by catching event.
Now row0,row1,row4,row5 will get submitted but in the controller your
userList will have 6 user object but user[2].firstName will be null
and user[3].firstName will be null.
So in your controller iterate and check for null and remove the
user.(Use iterator don't use foreach to remove user object)
Posting code to benefit beginners.
// In Controller
#RequestMapping(value = "/app/admin/add-users", method = RequestMethod.GET)
public String addUsers(Model model, HttpServletRequest request)
{
List<DbUserDetails> usersList = new ArrayList<>();
ListWrapper userListWrapper = new ListWrapper();
userListWrapper.setList(usersList);
DbUserDetails user;
for(int i=0; i<3;i++)
{
user = new DbUserDetails();
user.setGender("MALE"); //Initialization of Radio button/ Checkboxes/ Dropdowns
usersList.add(user);
}
model.addAttribute("userListWrapper", userListWrapper);
model.addAttribute("roleList", roleList);
return "add-users";
}
#RequestMapping(value = "/app/admin/add-users", method = RequestMethod.POST)
public String saveUsers(#ModelAttribute("userListWrapper") ListWrapper userListWrapper, Model model, HttpServletRequest request)
{
List<DbUserDetails> usersList = userListWrapper.getList();
Iterator<DbUserDetails> itr = usersList.iterator();
while(itr.hasNext())
{
if(itr.next().getFirstName() == null)
{
itr.remove();
}
}
userListWrapper.getList().forEach(user -> {
System.out.println(user.getFirstName());
});
return "add-users";
}
//POJO
#Entity
#Table(name = "userdetails")
#XmlRootElement(name = "user")
public class DbUserDetails implements Serializable
{
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String firstName;
private String userName;
private String email;
private String gender;
//setters and getters
}
//list wrapper
public class ListWrapper
{
private List<DbUserDetails> list;
//setters and getters
}
In JSP
<form:form method="post" action="${pageContext.request.contextPath}/app/admin/add-users" modelAttribute="userListWrapper">
<table class="table table-bordered">
<thead>
<tr>
<th><spring:message code="app.userform.firstname.label"/></th>
<th><spring:message code="app.userform.email.label"/></th>
<th><spring:message code="app.userform.username.label"/></th>
<th><spring:message code="app.userform.gender.label"/></th>
</tr>
</thead>
<tbody id="tbodyContainer">
<c:forEach items="${userListWrapper.list}" var="user" varStatus="loop">
<tr>
<td><form:input path="list[${loop.index}].firstName" /></td>
<td><form:input path="list[${loop.index}].email" /></td>
<td><form:input path="list[${loop.index}].userName" /></td>
<td>
<span>
<form:radiobutton path="list[${loop.index}].gender" value="MALE" /><spring:message code="app.userform.gender.male.label"/>
</span>
<span>
<form:radiobutton path="list[${loop.index}].gender" value="FEMALE" /><spring:message code="app.userform.gender.female.label"/>
</span>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<div class="offset-11 col-md-1">
<button type="submit" class="btn btn-primary">SAVE ALL</button>
</div>
</form:form>
Javascript needs to be included in JSP
var currentIndex = 3; //equals to initialRow (Rows shown on page load)
function addRow()
{
var rowConstructed = constructRow(currentIndex++);
$("#tbodyContainer").append(rowConstructed);
}
function constructRow(index)
{
return '<tr>'+
'<td><input id="list'+ index +'.firstName" name="list['+ index +'].firstName" type="text" value=""/></td>'+
'<td><input id="list'+ index +'.email" name="list['+ index +'].email" type="text" value=""/></td>'+
'<td><input id="list'+ index +'.userName" name="list['+ index +'].userName" type="text" value=""/></td>'+
'<td>'+
'<span>'+
'<input id="list'+ index +'.gender1" name="list['+ index +'].gender" type="radio" value="MALE" checked="checked"/>Male'+
'</span>'+
'<span>'+
'<input id="list'+ index +'.gender'+ index +'" name="list['+ index +'].gender" type="radio" value="FEMALE"/>Female'+
'</span>'+
'</td>'+
'</tr>';
}