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