小编Fly*_*ine的帖子

我一直在阅读Spring MVC HandlerMapping,HandlerAdapter但我对这两个概念感到困惑.我可以理解HandlerMapping用于将传入的HTTP请求映射到控制器但what is the use of HandlerAdapter?
why do we use it?
what is the exact difference between these two with example?
请帮助我.谢谢!!

我是HIbernate的新手,正在练习一对多映射的一些例子,但我不知道它为什么会抛出错误.

1)Employee.java

package com.common.pojo;

import java.util.Set;

public class Employee 
{
private int id;
private String name;
private Set certificate;

public Employee (){}

public Employee(String name) {

    this.name = name;

}
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 Set  getCertificate() {
    return certificate;
}

public void setCertificate(Set  certificate) {
    this.certificate = certificate;
}

}

2)Certificate.java …

我是Spring MVC的新手,面临一些错误.
我有两个控制器如下
1)LoginController.java

@Controller
@RequestMapping("/log")
public class LoginController {
    @Autowired
    private LoginService service;

    @RequestMapping(value="login.spring",method=RequestMethod.GET) 
    public ModelAndView prepareLoginForm()
    {
        System.out.println("In get");
        return new ModelAndView("Login", "login", new Login());
    }

    @RequestMapping(value="login.spring",method=RequestMethod.POST) 
    public ModelAndView processLogin(@ModelAttribute("login") Login login,BindingResult result)
    {
        int i=service.validateLogin(login);
        if(i==0){
            return  new ModelAndView("redirect:login.spring");
        }

        ModelAndView view=new ModelAndView("redirect:Customer/Searchform.spring");


        return view;
    }

}

2) CustomerController.java

@Controller
@RequestMapping("/Customer")
public class CustomerController {

    @Autowired
    private CustomerService customerService;


    @RequestMapping(value="Searchform.spring",method=RequestMethod.GET)
    public  ModelAndView prepareCustomer()
    {
        System.out.println("In customer controller");
        CustomerSearchForm customerSearchForm=new CustomerSearchForm();
        return new ModelAndView("CustomerSearch","customerSearchForm",customerSearchForm);

    }


    @RequestMapping(value="Search.spring",method=RequestMethod.POST)
    public …