Question

public class Employee implements IEmployee, Serializable {  

private static final long serialVersionUID = 3539505455231361934L;

@Column(name="emp_Id", nullable=false)
private Integer emp_Id;

@Id
@GeneratedValue
@Column(name="login_Id", nullable=false)
private String login_Id;

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

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

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

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

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

@Column(name="mobile_Number", nullable=false)
private Integer mobile_Number;

@Column(name="create_Date", nullable=false)
private Date create_Date;

@Column(name="modified_Date", nullable=false)
private Date modified_Date;

@Column(name="security_Question")
private String security_Question;

@Column(name="security_Question_Answer")
private String security_Question_Answer;

@Column(name="login_Attempts")
private String login_Attempts;

@OneToMany(cascade=CascadeType.ALL,fetch=FetchType.EAGER)
@JoinTable(name="employe_role",
joinColumns = {@JoinColumn(name="login_Id")},
inverseJoinColumns = {@JoinColumn(name="role_Id")})
private Collection<Role> role;//need to change name --> Dependent Object Role

---定居者和吸气鬼 }

作用

@Id
@GeneratedValue
@Column(name="role_Id")
private Integer role_Id;

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

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

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

@Column(name="created_Date")
private Date created_Date;

@Column(name="modified_Date")
private Date modified_Date;

JSP表单

<form:form name="register-employee" action="/registerEmployee" method="post" commandName="employee">
<c:forEach var="role" varStatus="statusEmpRole" items="${employee.role}">

    <form:hidden path="role[${statusEmpRole.index}].role_Name"  value="${role.role_Name}" />
    <form:checkbox path="role[${statusEmpRole.index}].role_Name" value="${role.role_Name}" itemValue="role.role_Id"  /> 
    <c:out value="${role.role_Name}" /><br>

控制器

用于显示表单

@Override
@RequestMapping(value="/employeeregistrationform", method = RequestMethod.GET)
public ModelAndView employeeRegistrationForm(@ModelAttribute("employee") Employee employee, Model map) throws HibernateException, RoleNotFoundException {
    IEmployee iEmployee = new Employee();
    Collection<Role> collectionRoles= IRoleService.getLookUpRoles();
    for (Role role : collectionRoles) {
        LOGGER.info("roel {}",role.getRole_Name());
    }
    iEmployee.setFirst_name("helloooooo");
    iEmployee.setRole(collectionRoles);
     return new ModelAndView("registerEmploye", "employee", iEmployee);  
}

获取提交的表单数据

@Override
@RequestMapping(value="/registerEmployee",method=RequestMethod.POST)
public ModelAndView registerEmployee(@ModelAttribute("employee")Employee employee, BindingResult result) {
    LOGGER.info("Registering Employe {}",employee.getFirst_name());
    LOGGER.info("Selected Role Employe {}",employee.getRole());
    ModelAndView model = new ModelAndView();    
    model.setViewName("registerEmploye");
    return model;
}

employee.getRole（）变为null 我的情况是员工有多个角色。让管理员和Projectmanager说。创建员工管理员可以在提交员工注册后选择角色（这些来自数据库），我得到的角色对象为空。

请帮帮我。我错过了像属性编辑器或init绑定器这样的东西。如果是这样，请举例说明如何使用它们。

由于

Answer 1

在Google找到答案之后

我创建了Init Binder

@InitBinder 
public void bindForm(WebDataBinder binder) {
    binder.registerCustomEditor(Collection.class, new RoleEditor(Collection.class,true));
}

我提供CustomCollectionEditor，即RoleEditor

package com.evoke.tms.util;

import java.util.HashSet; import java.util.Set;

import org.springframework.beans.propertyeditors.CustomCollectionEditor;

import com.evoke.tms.model.Role;

public class RoleEditor扩展CustomCollectionEditor {

private Set<Role> roles;

public RoleEditor(Class collectionType, boolean nullAsEmptyCollection) {
    super(collectionType, true);
}

public void setValue( Object object ){
    if(object!=null&&object instanceof String)
        System.out.println("Object is of type - " + object.getClass().getCanonicalName());
        String[] roleIds = (String[])object;
        roles=new HashSet<Role>();
        if(roleIds!=null && roleIds.length>0)
        for( int i=0; i<roleIds.length; i++ ){
            try {
                int id = Integer.parseInt(roleIds[i]);
                Role role = new Role();
                role.setRole_Id(id);
                roles.add(role);
            }catch( NumberFormatException ne ){}
        }
    }

public Object getValue(){
    System.out.println("Roles are - " + roles);
    return roles;
}

}

我仍然对它的运作方式感到困惑任何人都可以帮忙...

在Spring MVC中提交表单后无法获取依赖对象数据

作用

JSP表单

控制器

1 个答案: