package com.kite.controller;

import java.util.HashMap;

import java.util.Map;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.validation.BindingResult;

import org.springframework.validation.annotation.Validated;

import org.springframework.web.bind.annotation.ModelAttribute;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import com.kite.entity.User;

/**

 * 简单的增删改查实现

 * @author kite

 *

 */

@Controller

@RequestMapping(value={"/user"})

public class UserController

{

    //简单数据模拟

    Map<String, User> map = new HashMap<String, User>();

    public UserController()

    {

        map.put("zs", new User("zs", "", "张三", "123dsad456"));

        map.put("ll", new User("ll", "", "李四", "123dsa456"));

        map.put("ww", new User("ww", "", "王五", "dsa"));

        map.put("zl", new User("zl", "5dsada", "赵六", "dsadsa"));

    }

    /**

     * 显示列表

     * @param model

     * @return

     */

    @RequestMapping({"/list"})

    public String list(Model model)

    {

        model.addAttribute("users", map);

        return "user/list";

    }

    /**

     * 到添加页面使用method请求的方式来区分

     * @return

     */

    @RequestMapping(value={"/add"},method=RequestMethod.GET)

    public String add(User user)

    {

        return "/user/add";

    }

    /**

     * post请求方式实现真正的添加

     * 使用bean validation

     * BindingResult br 必须在@valid后面

     * @return

     */

    @RequestMapping(value={"/add"}, method=RequestMethod.POST)

    public String add(@Validated User user,  BindingResult br)

    {

        if(br.hasErrors())

        {

            //出错

            return "user/add";

        }

        map.put(user.getUserName(), user);

        return "redirect:/user/list";

    }

    /**

     * 查看

     * @param userName

     * @param model

     * @return

     */

    @RequestMapping({"/{userName}/show"})

    public String show(@PathVariable String userName, Model model)

    {

        User user = map.get(userName);

        model.addAttribute(user);

        return "/user/show";

    }

    /**

     * 到修改页面

     * @param userName

     * @return

     */

    @RequestMapping(value={"/{userName}/update"},method=RequestMethod.GET)

    public String update(@PathVariable @ModelAttribute(value="userName") String userName, Model model)

    {

        User user = map.get(userName);

        model.addAttribute(user);

        return "/user/update";

    }

    /**

     * 真正的更新

     * @param userName

     * @param user

     * @param br

     * @return

     */

    @RequestMapping(value={"/{userName}/update"},method=RequestMethod.POST)

    public String update(@PathVariable String userName, @Valid User user, BindingResult br)

    {

        map.put(userName, user);

        return "redirect:/user/list";

    }

    /**

     * 删除的实现

     * @param userName

     * @return

     */

    @RequestMapping(value={"/{userName}/delete"},method=RequestMethod.GET)

    public String delete(@PathVariable String userName)

    {

        map.remove(userName);

        return "redirect:/user/list";

    }

}

使用到bean validation的类  注解放在get方法只上

package com.kite.entity;

import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.Email;

import org.hibernate.validator.constraints.NotEmpty;

import org.hibernate.validator.constraints.Range;

public class User

{

    private String userName;

    private String password;

    private String nickName;

    private String email;

    public User()

    {

        super();

        // TODO Auto-generated constructor stub

    }

    public User(String userName, String password, String nickName, String email)

    {

        super();

        this.userName = userName;

        this.password = password;

        this.nickName = nickName;

        this.email = email;

    }

    @Override

    public String toString()

    {

        return "User [userName=" + userName + ", password=" + password

                + ", nickName=" + nickName + ", email=" + email + "]";

    }

    @NotEmpty(message="用户名不能为空")

    public String getUserName()

    {

        return userName;

    }

    public void setUserName(String userName)

    {

        this.userName = userName;

    }

    @Size(min=,max=,message="密码的长度必须在6-18之间")

    public String getPassword()

    {

        return password;

    }

    public void setPassword(String password)

    {

        this.password = password;

    }

    public String getNickName()

    {

        return nickName;

    }

    public void setNickName(String nickName)

    {

        this.nickName = nickName;

    }

    @Email(message="邮箱格式不符合")

    public String getEmail()

    {

        return email;

    }

    public void setEmail(String email)

    {

        this.email = email;

    }

}

其他代码就不一一复制了