Spring+SpringMvc+Mybatis框架集成搭建教程三(框架整合测试程序开发)

框架整合测试程序开发

(1).在mysql数据库中创建t_user表，sql语句如下

CREATE TABLE `t_user` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(255) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

(2).在main文件夹下的java源文件夹下创建com.hafiz.www包，并在该包下依次创建:

　　　　controller包(存放控制器)、

　　　　exception包(存放自定义异常及全局异常处理器)、

　　　　mapper包(存放mybatis的mapper接口)、

　　　　po包(存放数据库表的实体类)、

　　　　service包(存放业务层接口)，并在service包下创建

　　　　impl包(存放业务层实现)。

　　　　

(3).在po包下面创建UserEntity.java类

package com.hafiz.www.po;

/**
 * Desc:用户表实体类
 * Created by hafiz.zhang on 2016/8/27.
 */
public class UserEntity {
    private Long id;            // 编号
    private String userName;    // 用户名
    private String password;    // 密码

    public Long getId() {
        return id;
    }

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

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

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

(4).在mapper包下创建UserEntityMapper.java类

package com.hafiz.www.mapper;

import com.hafiz.www.po.UserEntity;

import java.util.List;

/**
 * Desc:用户表实体mapper接口类
 * Created by hafiz.zhang on 2016/8/27.
 */
public interface UserEntityMapper {

    /**
     * 查找所有的用户信息
     *
     * @return
     */
    List<UserEntity> getAllUsers();
}

(5).在resources文件下的mapper文件下创建UserEntityMapper.xml文件

<?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.hafiz.www.mapper.UserEntityMapper" >
  <resultMap id="BaseResultMap" type="com.hafiz.www.po.UserEntity" >
    <id column="id" property="id" jdbcType="INTEGER" />
    <result column="user_name" property="userName" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
  </resultMap>
  <sql id="Base_Column_List" >
    id, user_name, password
  </sql>
 <select id="getAllUsers" resultMap="BaseResultMap">
   SELECT
    <include refid="Base_Column_List"/>
   FROM
    t_user
 </select>
</mapper>

(6).在service包下创建UserService.java类

package com.hafiz.www.service;

import com.hafiz.www.po.UserEntity;

import java.util.List;

/**
 * Desc:用户表相关的service接口
 * Created by hafiz.zhang on 2016/8/27.
 */
public interface UserService {

    /**
     * 获取所有的用户信息
     *
     * @return
     */
    List<UserEntity> getAllUsers();
}

(7).在service包下的impl包创建UserServiceImpl.java类

package com.hafiz.www.service.impl;

import com.hafiz.www.mapper.UserEntityMapper;
import com.hafiz.www.po.UserEntity;
import com.hafiz.www.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * Desc:用户表相关的servie接口实现类
 *
 * Created by hafiz.zhang on 2016/8/27.
 */
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserEntityMapper mapper;

    @Override
    public List<UserEntity> getAllUsers() {
        return mapper.getAllUsers();
    }
}

(8).在controller包下创建UserController.java类

package com.hafiz.www.controller;

import com.hafiz.www.po.UserEntity;
import com.hafiz.www.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

/**
 * Desc:用户信息控制器
 * Created by hafiz.zhang on 2016/8/27.
 */
@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping(value = "/all", method = RequestMethod.GET)
    @ResponseBody
    public List<UserEntity> getAllUsers(){
        List<UserEntity> list = userService.getAllUsers();
        return list;
    }
}

(9).在exception包下创建全局异常处理器CustomExceptionResolver.java类(该类必须实现HandlerExceptionResolver接口)

package com.hafiz.www.exception;

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

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

/**
 * Desc:全局异常处理器
 * Created by hafiz.zhang on 2016/8/27.
 */
public class CustomExceptionResolver implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response,
                                         Object handler, Exception ex) {
        //handler就是处理器适配器要执行的处理器（只有method方法）

        //1.解析出异常类型
        CustomException exception = null;
        //如果该异常类型是系统自定义的异常，直接取出异常信息，在错误页面展示
        if(ex instanceof CustomException){
            exception = (CustomException)ex;
        }
        else{
            //如果该异常类型不是系统自定义的异常，构造一个自定义的异常类型（信息为“未知错误”）
            exception = new CustomException("未知错误,请于管理员联系");
        }

        ModelAndView modelAndView = new ModelAndView();

        //将错误信息传到页面
        modelAndView.addObject("message", exception.getMessage());

        //指定错误页面
        modelAndView.setViewName("error");

        return modelAndView;
    }
}

(10)在exception包下创CustomException.java建自定义异常类

package com.hafiz.www.exception;

/**
 * Desc:自定义异常类
 * Created by hafiz.zhang on 2016/8/27.
 */
public class CustomException extends Exception{
    private String message;
    
    public CustomException(String message) {
        super(message);
        this.message = message;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
    
}

(11).在webapp下的WEB-INF文件夹下创建jsp文件夹，并在该文件夹下创建error.jsp用来显示捕获的异常信息

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>错误页面</title>
</head>
<body>
    ${message}
</body>
</html>

到此为止，我们就完成了测试框架整合结果的程序。