[置顶] idea创建maven,spring,springmvc,mybatis,项目（三）

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idea创建maven,spring,springmvc,mybatis,项目（二） 

 http://blog.csdn.net/hcmony/article/details/77840891

1，UserController

package com.hcmony.controller;

import com.hcmony.model.User;
import com.hcmony.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
* Created by hcmony on 2017/9/1.
*/
@Controller
@RequestMapping("/user")
public class UserController {

@Autowired
private UserService userService;

@RequestMapping("/findUser")
public void findUser(Integer id){
User user = userService.findUser(id);
System.out.println("user的id是："+user.getId());
System.out.println("user的名字是："+user.getName());
}

@RequestMapping("/saveUser")
public void saveUser(Integer id,String name){
Integer num = userService.saveUser(id,name);
if(num!=null&&num>0){
System.out.println("保存成功了！");
}else {
System.out.println("保存失败了！");
}
}

}

2，UserService

package com.hcmony.service;

import com.hcmony.model.User;

/**
* Created by hcmony on 2017/9/1.
*/

public interface UserService {
public Integer saveUser(Integer id,String name);
public User findUser(Integer id);
}

3，UserServiceImpl

package com.hcmony.service.impl;

import com.hcmony.mapper.UserMapper;
import com.hcmony.model.User;
import com.hcmony.service.UserService;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
* Created by hcmony on 2017/9/1.
*/
@Service
public class UserServiceImpl implements UserService {

private static Logger logger = Logger.getLogger(UserService.class);

@Autowired
private UserMapper userMapper;

@Override
public Integer saveUser(Integer id, String name) {
try {
User user = new User();
user.setId(id);
user.setName(name);
System.out.println(id+"--------------"+name);
Integer num = userMapper.save(user);
return num;
}catch (Exception e){
logger.error("保存用户失败",e);
}
return null;
}

@Override
public User findUser(Integer id) {
try {
return userMapper.findById(id);
}catch (Exception e){
logger.error("查询用户失败",e);
}
return null;
}
}

4，UserMapper

package com.hcmony.mapper;

import com.hcmony.model.User;

/**
* Created by hcmony on 2017/9/1.
*/
public interface UserMapper {
public Integer save(User user);
public User findById (Integer id);
}

5，User

package com.hcmony.model;

/**
* Created by hcmony on 2017/9/1.
*/
public class User {
private Integer id;
private String name;

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;
}
}

5，UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.hcmony.mapper.UserMapper" >
<resultMap id="resultMap" type="com.hcmony.model.User" >
<constructor >
<idArg column="id" jdbcType="INTEGER" javaType="java.lang.Integer" />
<arg column="name" jdbcType="VARCHAR" javaType="java.lang.String" />
</constructor>
</resultMap>
<sql id="sql" >
id, name
</sql>
<select id="findById" resultMap="resultMap" parameterType="java.lang.Integer" >
select
<include refid="sql" />
from user
where id = #{id,jdbcType=INTEGER}
</select>

<insert id="save"  parameterType="com.hcmony.model.User">
insert into user (id, name)
values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR})
</insert>

</mapper>

6，EncodingInteceptor

package com.hcmony.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* Created by hcmony on 2017/9/1.
*/
public class EncodingInteceptor implements HandlerInterceptor {

/**
* 在controller前拦截
*/
@Override
public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
httpServletRequest.setCharacterEncoding("UTF-8");
httpServletResponse.setCharacterEncoding("UTF-8");
return true;
}

@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

}

@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

}
}

7，创建sql语句

/*Table structure for table `user` */

DROP TABLE IF EXISTS `user`;

CREATE TABLE `user` (

  `id` tinyint(12) unsigned NOT NULL AUTO_INCREMENT,

  `name` varchar(100) NOT NULL,

  `age` tinyint(3) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

/*Data for the table `user` */

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