如何使用spring mvc和hibernate從jsp插入到兩個表中

Question

我想用spring mvc4和hibernate從jsp插入到兩個表中。

這是我的兩個模型類。

1）Employee.java

package com.websystique.springmvc.model; 

import java.math.BigDecimal; 

import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.OneToOne; 
import javax.persistence.Table; 
import javax.validation.constraints.Digits; 
import javax.validation.constraints.NotNull; 
import javax.validation.constraints.Size; 

import org.hibernate.annotations.Cascade; 
import org.hibernate.annotations.Type; 
import org.hibernate.validator.constraints.NotEmpty; 
import org.joda.time.LocalDate; 
import org.springframework.format.annotation.DateTimeFormat; 
import com.websystique.springmvc.model.UserLogin;; 

@Entity 
@Table(name="EMPLOYEE") 
public class Employee { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private int id; 

    @Size(min=3, max=50) 
    @Column(name = "NAME", nullable = false) 
    private String name; 

    @NotNull 
    @DateTimeFormat(pattern="dd/MM/yyyy") 
    @Column(name = "JOINING_DATE", nullable = false) 
    @Type(type="org.jadira.usertype.dateandtime.joda.PersistentLocalDate") 
    private LocalDate joiningDate; 

    @NotNull 
    @Column(name = "SALARY", nullable = false) 
    private int salary; 

    @NotEmpty 
    @Column(name = "SSN", unique=true, nullable = false) 
    private String ssn; 


    @Column(name="emp_id",nullable=true) 
    private String emp_id; 



    public UserLogin getUserlogin() { 
     return userlogin; 
    } 

    public void setUserlogin(UserLogin userlogin) { 
     this.userlogin = userlogin; 
    } 

    public String getEmp_id() { 
     return emp_id; 
    } 

    public void setEmp_id(String emp_id) { 
     this.emp_id = emp_id; 
    } 

    @OneToOne(targetEntity=UserLogin.class,cascade=CascadeType.ALL) 
    @JoinColumn(name="emp_id",referencedColumnName="emp_id",insertable=false, updatable=false) 
    private UserLogin userlogin; 


    public int getId() { 
     return id; 
    } 

    public void setId(int id) { 
     this.id = id; 
    } 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public LocalDate getJoiningDate() { 
     return joiningDate; 
    } 

    public void setJoiningDate(LocalDate joiningDate) { 
     this.joiningDate = joiningDate; 
    } 

    public int getSalary() { 
     return salary; 
    } 

    public void setSalary(int salary) { 
     this.salary = salary; 
    } 

    public String getSsn() { 
     return ssn; 
    } 

    public void setSsn(String ssn) { 
     this.ssn = ssn; 
    } 

    @Override 
    public int hashCode() { 
     final int prime = 31; 
     int result = 1; 
     result = prime * result + id; 
     result = prime * result + ((ssn == null) ? 0 : ssn.hashCode()); 
     return result; 
    } 

    @Override 
    public boolean equals(Object obj) { 
     if (this == obj) 
      return true; 
     if (obj == null) 
      return false; 
     if (!(obj instanceof Employee)) 
      return false; 
     Employee other = (Employee) obj; 
     if (id != other.id) 
      return false; 
     if (ssn == null) { 
      if (other.ssn != null) 
       return false; 
     } else if (!ssn.equals(other.ssn)) 
      return false; 
     return true; 
    } 

    @Override 
    public String toString() { 
     return "Employee [id=" + id + ", name=" + name + ", joiningDate=" 
       + joiningDate + ", salary=" + salary + ", ssn=" + ssn + "]"; 
    } 




} 

2）UserLogin.java

package com.websystique.springmvc.model; 

import java.io.Serializable; 

import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.OneToOne; 
import javax.persistence.PrimaryKeyJoinColumn; 
import javax.persistence.Table; 

import org.hibernate.annotations.GenericGenerator; 

@Entity 
@Table(name="users") 
public class UserLogin implements Serializable{ 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private int id; 

    @Column(name="emp_id", unique=true, nullable=true) 
    private String emp_id; 



    @Column(name="user_name",nullable=false) 
    private String user_name; 

    @Column(name="password",nullable=false) 
    private String password; 



    public int getId() { 
     return id; 
    } 

    public void setId(int id) { 
     this.id = id; 
    } 

    public String getUser_name() { 
     return user_name; 
    } 

    public void setUser_name(String user_name) { 
     this.user_name = user_name; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 


} 

這裏是我的jsp頁面（registration.jsp）

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 
    pageEncoding="ISO-8859-1"%> 
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> 
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 

<html> 

<head> 
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 
    <title>Employee Registration Form</title> 

<style> 

    .error { 
     color: #ff0000; 
    } 
</style> 

</head> 

<body> 

    <h2>Registration Form</h2> 

    <form:form method="POST" modelAttribute="employee"> 
     <form:input type="hidden" path="id" id="id"/> 
     <table> 
      <tr> 
       <td><label for="name">Name: </label> </td> 
       <td><form:input path="name" id="name"/></td> 
       <td><form:errors path="name" cssClass="error"/></td> 
      </tr> 
      <tr> 
       <td><label for="user_name">User Name: </label> </td> 
       <td><form:input path="user_name" id="user_name"/></td> 
       <td><form:errors path="user_name" cssClass="error"/></td> 
      </tr> 
      <tr> 
       <td><label for="pwd">Password: </label> </td> 
       <td><form:input type="password" path="password" id="password"/></td> 
       <td><form:errors path="password" cssClass="error"/></td> 
      </tr> 
      <tr> 
       <td><label for="joiningDate">Joining Date: </label> </td> 
       <td><form:input path="joiningDate" id="joiningDate"/></td> 
       <td><form:errors path="joiningDate" cssClass="error"/></td> 
      </tr> 

      <tr> 
       <td><label for="salary">Salary: </label> </td> 
       <td><form:input path="salary" id="salary"/></td> 
       <td><form:errors path="salary" cssClass="error"/></td> 
      </tr> 

      <tr> 
       <td><label for="ssn">SSN: </label> </td> 
       <td><form:input path="ssn" id="ssn"/></td> 
       <td><form:errors path="ssn" cssClass="error"/></td> 
      </tr> 

      <tr> 
       <td colspan="3"> 
        <c:choose> 
         <c:when test="${edit}"> 
          <input type="submit" value="Update"/> 
         </c:when> 
         <c:otherwise> 
          <input type="submit" value="Register"/> 
         </c:otherwise> 
        </c:choose> 
       </td> 
      </tr> 
     </table> 
    </form:form> 
    <br/> 
    <br/> 
    Go back to <a href="<c:url value='/list' />">List of All Employees</a> 
</body> 
</html> 

這裏是我的控制器

@RequestMapping(value = { "/new" }, method = RequestMethod.POST) 
public String saveEmployee(@Valid Employee employee,@Valid UserLogin userLogin, BindingResult result, 
     ModelMap model) { 
    System.out.println("inside controller"); 
    System.out.println("result>>>> "+result); 

    if (result.hasErrors()) { 
     System.out.println("inside controller1111111111"); 
     return "registration"; 
    } 

    if(!service.isEmployeeSsnUnique(employee.getId(), employee.getSsn())){ 
     System.out.println("inside controller1111111111222222222222222222222"); 
     FieldError ssnError =new FieldError("employee","ssn",messageSource.getMessage("non.unique.ssn", new String[]{employee.getSsn()}, Locale.getDefault())); 
     result.addError(ssnError); 
     return "registration"; 
    } 
    String emp="Emp-"+employee.getId()+"-"+employee.getName(); 
    System.out.println("emp>>> "+emp); 
    employee.setEmp_id(emp); 

    service.saveEmployee(employee); 

    userservice.saveUser(userLogin); 

    model.addAttribute("success", "Employee " + employee.getName() + " registered successfully"); 
    return "success"; 
} 

所以我想將用戶名和密碼保存到登錄表中，其餘數據要保存到另一個表中。有沒有人可以幫助我如何將數據插入到兩個表中。我搜查了很多，但沒有得到豐碩的成果。對於這個問題的任何鏈接也表示讚賞。在此先感謝

Answer 1

您可以使用實體繼承。檢查這http://www.thoughts-on-java.org/complete-guide-inheritance-strategies-jpa-hibernate/ 。選擇適合您的要求的策略。