ssm综合案例【测试各层】（一）

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目录

一. ssm三大框架的搭建

1.准备工作

目录结构：（可以先不写这一步）

1)准备jar

2.搭建Dao的环境

3.dao的测试

1）.新建一个接口AccountMapper

2）.编写AccountMapper.xml

4.Service的环境

5.Controller层环境搭建

6.注解方式全局异常处理

---

一. ssm三大框架的搭建

1.准备工作

目录结构：（可以先不写这一步）

1)准备jar

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yanlong.ssm_4</groupId>
    <artifactId>ssm_4</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>war</packaging>

    <dependencies>
        <!-- 单元测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.2.4.RELEASE</version>
        </dependency>

        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.8</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>

        <!-- MySql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.46</version>
        </dependency>

        <!--日志包-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.6.6</version>
        </dependency>

        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.14</version>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.6</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.18</version>
            <scope>compile</scope>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <!-- 配置Tomcat插件 -->
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/</path>
                    <port>8080</port>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2.搭建Dao的环境

1.数据库的准备

DROP TABLE IF EXISTS `tb_user`;
CREATE TABLE `tb_user` (
  `id` BIGINT(20) NOT NULL AUTO_INCREMENT,
  `username` VARCHAR(100) DEFAULT NULL COMMENT '用户名',
  `password` VARCHAR(100) DEFAULT NULL COMMENT '密码',
  `name` VARCHAR(100) DEFAULT NULL COMMENT '姓名',
  `age` INT(10) DEFAULT NULL COMMENT '年龄',
  `sex` TINYINT(1) DEFAULT NULL COMMENT '性别，1男性，2女性',
  `birthday` DATE DEFAULT NULL COMMENT '出生日期',
  `created` DATETIME DEFAULT NULL COMMENT '创建时间',
  `updated` DATETIME DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of tb_user
-- ----------------------------
INSERT INTO `tb_user` VALUES ('1', 'zhangsan', '123456', '张三', '30', '1', '1984-08-08', '2014-09-19 16:56:04', '2014-09-21 11:24:59');
INSERT INTO `tb_user` VALUES ('2', 'lisi', '123456', '李四', '21', '2', '1991-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('3', 'wangwu', '123456', '王五', '22', '2', '1989-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('4', 'zhangwei', '123456', '张伟', '20', '1', '1988-09-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('5', 'lina', '123456', '李娜', '28', '1', '1985-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
INSERT INTO `tb_user` VALUES ('6', 'lilei', '123456', '李磊', '23', '1', '1988-08-08', '2014-09-20 11:41:15', '2014-09-20 11:41:15');

SELECT COUNT(*) FROM tb_user

2.配置文件

1)SqlMapConfig.xml 空文件

2)applicationContext-dao.xml (创建修改内容)

从外部加载数据源

配置连接池并设置属性

创建一个SqlSessionFactoryBean对象注入(dataSource 加载SqlMapConfig.xml 起别名)

配置Mapper扫描

3)AccountMapper.xml (复制,并且修改内容)

4) jdbc.properties (复制)

5) log4j.properties

1)SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

</configuration>

applicationContext-dao.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

   <!-- applicationContext-dao.xml
    1)引入外部数据库信息
    2)编写连接池
    3)创建SqlSessionFactoryBean(注入连接池  加载SqlMapConfigx.xml 扫描包起别名)
    4)MapperScannerConfiguar  包扫描(1.加载Mapper映射文件  2.生成接口的代理对象)-->

    <!--1)引入外部数据库信息-->
   <context:property-placeholder location="classpath:jdbc.properties"/>

   <!--2)编写连接池-->
   <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
      <property name="driverClassName" value="${jdbc.driverClassName}"/>
      <property name="url" value="${jdbc.url}"/>
      <property name="username" value="${jdbc.username}"/>
      <property name="password" value="${jdbc.password}"/>
   </bean>

   <!--3)创建SqlSessionFactoryBean(注入连接池  加载SqlMapConfigx.xml 扫描包起别名)-->
   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
      <property name="dataSource" ref="dataSource"/>
      <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"/>
      <property name="typeAliasesPackage" value="com.yanlong.pojo"/>
   </bean>


   <!--4)MapperScannerConfiguar  包扫描(1.加载Mapper映射文件  2.生成接口的代理对象)-->
   <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
      <property name="basePackage" value="com.yanlong.mapper"/>
   </bean>
</beans>

AccountMapper.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="">
​
​
</mapper>

jdbc.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/springmvc_db?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
jdbc.username=root
jdbc.password=123456

log4j.properties：

log4j.rootLogger=DEBUG,A1
log4j.logger.com.taotao = DEBUG
log4j.logger.org.mybatis = DEBUG
​
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c]-[%p] %m%n

3.dao的测试

1.新建一个接口AccountMapper

AccountMapper.java

package com.yanlong.mapper;

import org.apache.ibatis.annotations.Param;

/**
 * @Version 1.0
 * @Author:cyl
 * @Date:2019/7/8 0008
 * @Content:
 */
public interface AccountMapper {

    //转入
    public void transferIn(@Param("inName") String inName, @Param("money")double money);

    //转出
    public void transferOut(@Param("outName")String outName,@Param("money")double money);
}

2.编写AccountMapper.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.yanlong.mapper.AccountMapper">

    <!--1.转入-->
    <update id="transferIn" >
        UPDATE account set money = money + #{money} where name = #{inName}
    </update>

    <!--2转出-->
    <update id="transferOut" >
        UPDATE account set money = money - #{money} where name = #{outName}
    </update>
</mapper>

3.测试类AccountMapperTest

package com.yanlong.mapper;

import com.yanlong.mapper.AccountMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static org.junit.Assert.*;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring/applicationContext-dao.xml")
public class AccountMapperTest {

    @Autowired
    private AccountMapper mapper;

    @Test
    public void transferInTest() {
      mapper.transferIn("rose",200);
    }

    @Test
    public void transferOut() {
        mapper.transferOut("jack",200);
    }
}

测试以后查看数据的是否发生变化发生变化则，配置成功，否则就是配置失败

4.Service的环境

1.配置文件

applicationContext-service.xml

扫描com.itheima.service包

创建平台事务管理器 DataSourceTransactionManager (注入dataSource)

配置注解驱动,挂载平台事务管理器

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- service
     applicationContext-service.xml
     1.包扫描service层
     2.事务管理
     创建平台事务管理器(注入dataSource)
     注解驱动<tx:annotation-drivern>  挂在事务平台管理器-->

    <!--1.包扫描service层-->
    <context:component-scan base-package="com.yanlong.service"/>

    <!--2.事务管理-->
    <!--创建平台事务管理器(注入dataSource)-->
    <!--注解驱动<tx:annotation-drivern>  挂在事务平台管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--注解驱动-->
    <tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

需要注意一点：

2.测试service层的配置：

给service包中个一个AccountService接口

package com.yanlong.service;

public interface AccountService {

    //转账
    public void transfer(String inName, String outName, double money);
}

AccountServiceImpl实现 (添加2个注解 @Service @Transactional)

package com.yanlong.service;

import com.yanlong.mapper.AccountMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * @Version 1.0
 * @Author:cyl
 * @Date:2019/7/8 0008
 * @Content:
 */
@Service
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountMapper mapper;

    @Transactional
    public void transfer(String inName, String outName, double money) {
        mapper.transferIn(inName,money);
        //int i = 1/0;
        mapper.transferOut(outName,money);
    }
}

AccountServiceTest测试类:(有异常,没有异常)

package com.yanlong.service;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static org.junit.Assert.*;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring/applicationContext-*.xml")
public class AccountServiceImplTest {

    @Autowired
    private AccountService service;

    @Test
    public void transferTest() {
        service.transfer("rose","jack",500);
    }
}

5.Controller层环境搭建

1)准备webapp目录

2)配置文件

springmvc.xml文件

包扫描controller

三大组件(注解驱动 视图解析器[前缀和后缀])

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--springmvc.xml-->
    <!--1.包扫描 controller-->
    <!--2.注解驱动(处理器映射器, 处理器适配器 ) 视图解析器-->
    <context:component-scan base-package="com.yanlong.controller"/>

    <mvc:annotation-driven/>

    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

web.xml

配置监听器 ContextLoaderListener , 配置加载spring文件路径

前端控制器DispatcherServlet ,

里面配置加载springmvc.xml的路径, 配置启动加载时机 load-on-startup 2

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <!--web.xml
  1.监听器
  2.context-param 设置加载spring配置文件的路径
  3.前端控制器
  init-param 加载springmvc的配置文件
  load-on-startup   加载时机-->

  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring/applicationContext-*.xml</param-value>
  </context-param>

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--加载springmvc的路径-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc/springmvc.xml</param-value>
    </init-param>
    <!--加载时机-->
    <load-on-startup>2</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>*.action</url-pattern>
  </servlet-mapping>
</web-app>

3)测试

AccountController 类,写一个方法转账的方法,进行测试

package com.yanlong.controller;

import com.yanlong.mapper.AccountMapper;
import com.yanlong.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @Version 1.0
 * @Author:cyl
 * @Date:2019/7/8 0008
 * @Content:
 */
public class AccountController {
    @Autowired
    private AccountService service;
​
    //转账的方法
    @RequestMapping("transfer")
    public String transfer(String inName, String outName,double money){
        service.transfer(inName,outName,money);
        return "success";
    }
}

测试:

http://localhost:8080/transfer.action?inName=jack&outName=rose&money=500

6.注解方式全局异常处理

controller包下创建一个全局异常处理类

package com.yanlong.controller;
​
​
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.servlet.ModelAndView;
​
@ControllerAdvice
public class CommonsExceptionHandler {
    /**
     * 用一个Controller类中的方法来处理异常
     * 所有的异常他都抓
     */
    @ExceptionHandler(Exception.class)
    public ModelAndView handlerException(Exception exception){
        /**
         * 获取异常信息
         * 并且给程序员发邮件
         * 给用户安抚页面
         */
        ModelAndView modelAndView = new ModelAndView();
        String message = exception.getMessage();
        System.out.println("给程序员发邮件,提示错误消息"+message);
        modelAndView.addObject("message",message);
        modelAndView.setViewName("error");
        return  modelAndView;
    }
}