使用maven3.5.3 版本,进行命令行创建项目时输入以下命令创建失败
mvn archetype:create -DgroupId=com.myl -DartifactId=system-parent -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
主要报错信息:Could not find goal ‘create’ in plugin org.apache.maven.plugins:maven-archetype-plugin:3.0.0 among available goals crawl, create-from-project, generate, help, integration-test, jar, update-local-catalog -> [Help 1]
原因:版本命令冲突,即在maven3.0.5以上版本舍弃了create,使用generate生成项目
修改命令
mvn archetype:generate -DgroupId=me.gacl -DartifactId=spring4-mybatis3 -DarchetypeArtifactId=maven-archetype-webapp -DinteractiveMode=false
创建成功,如图所示:
创建项目如图所示:
编辑pom.xml文件
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.myl</groupId> <artifactId>spring4-mybatis3</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>spring4-mybatis3 Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>spring4-mybatis3</finalName> </build> </project>
修改 <name>spring4-mybatis3 Maven Webapp</name> 部分,把" Maven Webapp"这部分包含空格的内容去掉,否则Maven在编译项目时会因为空格的原因导致一些莫名其妙的错误出现,修改成: <name>spring4-mybatis3</name> 。
另外,把以下内容删掉:
<dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency>
这部分是junit的jar包依赖信息,这个版本太低了,我们不使用这个Junit测试版本,修改过后的pom.xml内容如下:
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.myl</groupId> <artifactId>spring4-mybatis3</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>spring4-mybatis3</name> <url>http://maven.apache.org</url> <dependencies> </dependencies> <build> <finalName>spring4-mybatis3</finalName> </build> </project>
1.2、将创建好的项目导入MyEclipse中
具体操作步骤如下图所示:
自动创建创建【src/main/java】、【src/test/resources】、【src/test/java】这三个source folder,如下图所示:
(如果不能自动创建则手动创建)
到此,项目搭建的工作就算是全部完成了。
二、创建数据库和表(针对MySQL)
SQL脚本如下:
Create DATABASE spring4_mybatis3; USE spring4_mybatis3; DROP TABLE IF EXISTS t_user; CREATE TABLE t_user ( user_id char(32) NOT NULL, user_name varchar(30) DEFAULT NULL, user_birthday date DEFAULT NULL, user_salary double DEFAULT NULL, PRIMARY KEY (user_id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
创建好的数据库和表如下:
三、使用generator工具生成代码
在网上找到了一个generator工具可以根据创建好的数据库表生成MyBatis的表对应的实体类,SQL映射文件和dao,找到generator工具根目录下的generator.xml文件,这个文件是用来配置代码生成规则的,如下图所示:
刚才我们在generator.xml文件中配置将生成的代码和SQL映射文件放到"C:\Users\gacl\spring4-mybatis3\src\main\java"这个目录下,这个目录就是我们的spring4-mybatis3项目所在目录,我们刷新一下src/main/java目录,就可以看到生成的代码和映射文件了,如下图所示:
生成的代码和映射文件一行都不用改,可以直接应用到项目当中。下面我们看一眼由generator工具生成的代码和映射文件:
1、生成的dao类(UserMapper.java)
package com.myl.dao; import com.myl.domain.User; public interface UserMapper { int deleteByPrimaryKey(String userId); int insert(User record); int insertSelective(User record); User selectByPrimaryKey(String userId); int updateByPrimaryKeySelective(User record); int updateByPrimaryKey(User record); }
生成的UserMapper是一个接口,里面定义了一些操作t_user表的增删改查方法。
2、生成的实体类(User.java)
package com.myl.domain; import java.util.Date; public class User { private String userId; private String userName; private Date userBirthday; private Double userSalary; public String getUserId() { return userId; } public void setUserId(String userId) { this.userId = userId == null ? null : userId.trim(); } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName == null ? null : userName.trim(); } public Date getUserBirthday() { return userBirthday; } public void setUserBirthday(Date userBirthday) { this.userBirthday = userBirthday; } public Double getUserSalary() { return userSalary; } public void setUserSalary(Double userSalary) { this.userSalary = userSalary; } }
User类是t_user表的对应的实体类,User类中定义的属性和t_user表中的字段一一对应。
3、生成的SQL映射文件(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.myl.dao.UserMapper" > <resultMap id="BaseResultMap" type="com.myl.domain.User" > <id column="user_id" property="userId" jdbcType="CHAR" /> <result column="user_name" property="userName" jdbcType="VARCHAR" /> <result column="user_birthday" property="userBirthday" jdbcType="DATE" /> <result column="user_salary" property="userSalary" jdbcType="DOUBLE" /> </resultMap> <sql id="Base_Column_List" > user_id, user_name, user_birthday, user_salary </sql> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" > select <include refid="Base_Column_List" /> from t_user where user_id = #{userId,jdbcType=CHAR} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.String" > delete from t_user where user_id = #{userId,jdbcType=CHAR} </delete> <insert id="insert" parameterType="com.myl.domain.User" > insert into t_user (user_id, user_name, user_birthday, user_salary) values (#{userId,jdbcType=CHAR}, #{userName,jdbcType=VARCHAR}, #{userBirthday,jdbcType=DATE}, #{userSalary,jdbcType=DOUBLE}) </insert> <insert id="insertSelective" parameterType="com.myl.domain.User" > insert into t_user <trim prefix="(" suffix=")" suffixOverrides="," > <if test="userId != null" > user_id, </if> <if test="userName != null" > user_name, </if> <if test="userBirthday != null" > user_birthday, </if> <if test="userSalary != null" > user_salary, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="userId != null" > #{userId,jdbcType=CHAR}, </if> <if test="userName != null" > #{userName,jdbcType=VARCHAR}, </if> <if test="userBirthday != null" > #{userBirthday,jdbcType=DATE}, </if> <if test="userSalary != null" > #{userSalary,jdbcType=DOUBLE}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="com.myl.domain.User" > update t_user <set > <if test="userName != null" > user_name = #{userName,jdbcType=VARCHAR}, </if> <if test="userBirthday != null" > user_birthday = #{userBirthday,jdbcType=DATE}, </if> <if test="userSalary != null" > user_salary = #{userSalary,jdbcType=DOUBLE}, </if> </set> where user_id = #{userId,jdbcType=CHAR} </update> <update id="updateByPrimaryKey" parameterType="com.myl.domain.User" > update t_user set user_name = #{userName,jdbcType=VARCHAR}, user_birthday = #{userBirthday,jdbcType=DATE}, user_salary = #{userSalary,jdbcType=DOUBLE} where user_id = #{userId,jdbcType=CHAR} </update> </mapper>
UserMapper.xml这个文件的内容是编写操作t_user表的SQL语句,重点说一下UserMapper.xml配置中需要注意的几个小细节问题:
1、UserMapper.xml的<mapper>标签的namespace必须是UserMapper接口的全类名,既<mapper namespace="com.myl.dao.UserMapper" >
2、UserMapper.xml的定义操作数据库的<select><delete><update><insert>这些标签的id属性的值必须和UserMapper接口定义的方法名一致,如下图所示:
之所以有上述说的这两点要求,就是为了能够让MyBatis能够根据UserMapper接口和UserMapper.xml文件去自动实现UserMapper接口中定义的相关方法,这样我们就不再需要针对UserMapper接口去编写具体的实现代码了。
四、Spring与MyBatis整合
首先我们要在项目中加入我们需要的相关jar包,我们可以到Maven的中央仓库:http://search.maven.org/ 找到我们要的相关jar包,如下图所示:
我们只需要在搜索框中输入要找的jar包的名称,点击【SEARCH】按钮,就可以找到我们要的jar包了。
4.1、添加Spring与Mybatis的相关jar包
1、添加spring-core,输入spring-core关键字进行查找,如下图所示:
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.myl</groupId> <artifactId>spring4-mybatis3</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>spring4-mybatis3</name> <url>http://maven.apache.org</url> <dependencies> <!-- 添加Spring5.0.5的核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>5.0.5.RELEASE</version> </dependency> </dependencies> <build> <finalName>spring4-mybatis3</finalName> </build> </project>
这样Maven就会自动帮我们从Maven的中央仓库中下载spring-core这个jar包到我们的本地仓库,然后将spring-core这个jar包以及它的相关依赖包加入到我们的项目当中,如下所示:
spring-core包依赖springjcl包,所以会吧该包自动导入,这就是用maven的好处,可以自动帮我们管理依赖包
spring4.x与mybatis3.x所需要的相关jar包都可以采用上述所说的方式进行查找,然后添加到项目当中,添加完spring4.x与mybatis3.x相关jar包后,pom.xml文件内容最终如下:
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.myl</groupId> <artifactId>spring4-mybatis3</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>spring4-mybatis3</name> <url>http://maven.apache.org</url> <dependencies> <!-- 添加Spring5.0.5的核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>5.0.5.RELEASE</version> </dependency> <!-- 添加spring-context包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.0.5.RELEASE</version> </dependency> <!-- 添加spring-jdbc包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.0.5.RELEASE</version> </dependency> <!-- 为了方便进行单元测试,添加spring-test包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>5.0.5.RELEASE</version> </dependency> <!--添加spring-web包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>5.0.5.RELEASE</version> </dependency> <!--添加aspectjweaver包 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.1</version> </dependency> <!-- 添加mybatis的核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <!-- 添加mybatis与Spring整合的核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.2</version> </dependency> <!-- 添加servlet4.0.1核心包 --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.2-b02</version> </dependency> <!-- jstl --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- 添加mysql驱动包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> <!-- 添加druid连接池包 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.9</version> </dependency> <!-- 添加junit单元测试包 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>spring4-mybatis3</finalName> </build> </project>
4.2、编写相关配置文件
1、dbconfig.properties
在src/main/resources目录下创建一个dbconfig.properties文件,用于编写连接MySQL数据库的相关信息,dbconfig.properties的内容如下:
driverClassName=com.mysql.jdbc.Driver validationQuery=SELECT 1 jdbc_url=jdbc:mysql://localhost:3306/spring4_mybatis3?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull jdbc_username=root jdbc_password=
2、spring.xml(spring框架的配置文件)
在src/main/resources目录下创建一个spring.xml文件,spring.xml文件就是针对Spring框架编写的核心配置文件,spring.xml的内容如下:
<?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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!-- 引入dbconfig.properties属性文件 --> <context:property-placeholder location="classpath:dbconfig.properties" /> <!-- 自动扫描(自动注入),扫描me.gacl.service这个包以及它的子包的所有使用@Service注解标注的类 --> <context:component-scan base-package="com.myl.service" /> </beans>
我们的spring.xml文件的配置非常简单,就两个配置。
3、spring-mybatis.xml(spring与mybatis整合的配置文件)
在src/main/resources目录下创建一个spring-mybatis.xml文件,spring-mybatis.xml文件就是针对Spring框架与Mybatis框架整合编写的配置文件,spring-mybatis.xml的内容如下:
<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd "> <!-- JNDI方式配置数据源 --> <!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> --> <!-- ========================================配置数据源========================================= --> <!-- 配置数据源,使用的是alibaba的Druid(德鲁伊)数据源 --> <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="url" value="${jdbc_url}" /> <property name="username" value="${jdbc_username}" /> <property name="password" value="${jdbc_password}" /> <!-- 初始化连接大小 --> <property name="initialSize" value="0" /> <!-- 连接池最大使用连接数量 --> <property name="maxActive" value="20" /> <!-- 连接池最大空闲 --> <property name="maxIdle" value="20" /> <!-- 连接池最小空闲 --> <property name="minIdle" value="0" /> <!-- 获取连接最大等待时间 --> <property name="maxWait" value="60000" /> <!-- <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> --> <property name="validationQuery" value="${validationQuery}" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <property name="testWhileIdle" value="true" /> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="25200000" /> <!-- 打开removeAbandoned功能 --> <property name="removeAbandoned" value="true" /> <!-- 1800秒,也就是30分钟 --> <property name="removeAbandonedTimeout" value="1800" /> <!-- 关闭abanded连接时输出错误日志 --> <property name="logAbandoned" value="true" /> <!-- 监控数据库 --> <!-- <property name="filters" value="stat" /> --> <property name="filters" value="mergeStat" /> </bean> <!-- ========================================分隔线========================================= --> <!-- ========================================针对myBatis的配置项============================== --> <!-- 配置sqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 --> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描com/myl/mapping/目录下的所有SQL映射的xml文件, 省掉Configuration.xml里的手工配置 value="classpath:com/myl/mapping/*.xml"指的是classpath(类路径)下com.myl.mapping包中的所有xml文件 UserMapper.xml位于com.myl.mapping包下,这样UserMapper.xml就可以被自动扫描 --> <property name="mapperLocations" value="classpath:com/myl/mapping/*.xml" /> </bean> <!-- 配置扫描器 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 扫描com.myl.dao这个包以及它的子包下的所有映射接口类 --> <property name="basePackage" value="com.myl.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </bean> <!-- ========================================分隔线========================================= --> <!-- 配置Spring的事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 注解方式配置事物 --> <!-- <tx:annotation-driven transaction-manager="transactionManager" /> --> <!-- 拦截器方式配置事物 --> <tx:advice id="transactionAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="append*" propagation="REQUIRED" /> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="modify*" propagation="REQUIRED" /> <tx:method name="edit*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="remove*" propagation="REQUIRED" /> <tx:method name="repair" propagation="REQUIRED" /> <tx:method name="delAndRepair" propagation="REQUIRED" /> <tx:method name="get*" propagation="SUPPORTS" /> <tx:method name="find*" propagation="SUPPORTS" /> <tx:method name="load*" propagation="SUPPORTS" /> <tx:method name="search*" propagation="SUPPORTS" /> <tx:method name="datagrid*" propagation="SUPPORTS" /> <tx:method name="*" propagation="SUPPORTS" /> </tx:attributes> </tx:advice> <aop:config> <aop:pointcut id="transactionPointcut" expression="execution(* com.myl.service..*Impl.*(..))" /> <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" /> </aop:config> <!-- 配置druid监控spring jdbc --> <bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"> </bean> <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype"> <property name="patterns"> <list> <value>com.myl.service.*</value> </list> </property> </bean> <aop:config> <aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" /> </aop:config> </beans>
到此,相关的配置文件算是编写完成了,如下图所示:
4.3、进行单元测试
经过以上两个步骤,spring4与mybatis3的整合算是全部完成了。接下来我们要做的工作就算进行单元测试,测试一下spring4与mybatis3的整合是否成功。
1、在src/main/java目录下创建一个com.myl.service包,然后在com.myl.service包创建一个UserServiceI接口,如下所示:
package com.myl.service; import com.myl.domain.User; public interface UserServiceI { /** * 添加用户 * @Title: addUser * @param: @param user * @return: void */ void addUser(User user); /** * 根据用户id获取用户 * @Title: getUserById * @param: @param id * @param: @return * @return: User */ User getUserById(String userId); }
2、在src/main/java目录下创建一个com.myl.service.impl包,然后在com.myl.service.impl包创建一个针对UserServiceI接口的实现类:UserServiceImpl,如下所示:
package com.myl.service.impl; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.myl.dao.UserMapper; import com.myl.domain.User; import com.myl.service.UserServiceI; /** * @author myl * @date 2018年5月6日 上午10:24:26 * 使用@Service注解将UserServiceImpl类标注为一个service * service的id是userService */ @Service("userService") public class UserServiceImpl implements UserServiceI { /** * 使用@Autowired注解标注userMapper变量, * 当需要使用UserMapper时,Spring就会自动注入UserMapper */ @Autowired private UserMapper userMapper;//注入dao public void addUser(User user) { userMapper.insert(user); } public User getUserById(String userId) { return userMapper.selectByPrimaryKey(userId); } }
创建好的两个类如下所示:
3、在src/test/java目录下编写单元测试类,新建一个me.gacl.test包,然后在这个包下创建一个MyBatisTest类,代码如下:
package test; import java.util.Date; import java.util.UUID; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.myl.domain.User; import com.myl.service.UserServiceI; @RunWith(SpringJUnit4ClassRunner.class) //配置了@ContextConfiguration注解并使用该注解的locations属性指明spring和配置文件之后, @ContextConfiguration(locations = {"classpath:spring.xml", "classpath:spring-mybatis.xml" }) public class MyBatisTest { @Autowired private UserServiceI userService; public void before(){ //使用"spring.xml"和"spring-mybatis.xml"这两个配置文件创建Spring上下文 ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"}); //从Spring容器中根据bean的id取出我们要使用的userService对象 userService = (UserServiceI) ac.getBean("userService"); System.out.println(userService); } @Test public void testAddUser(){ //ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"}); //UserServiceI userService = (UserServiceI) ac.getBean("userService"); User user = new User(); user.setUserId(UUID.randomUUID().toString().replaceAll("-", "")); user.setUserName("maoyl"); user.setUserBirthday(new Date()); user.setUserSalary(10000D); userService.addUser(user); } }
直接执行单元测试代码,这时候会报如下错误:
错误提示是说没有找到"com.myl.test.MyBatisTest"这个类,这是因为我们没有使用maven编译项目中的类的缘故。
解决方法:
下面我们使用Maven编译项目,选中项目的pom.xml文件→【Debug As】→【maven install】,编译成功,如下所示:
执行这两个测试方法,是可以正常测试通过的,如下所示:
执行成功则在数据库添加数据:
到此,我们框架的整合测试工作就算是全部通过了,整合成功。
4.4、在web服务器中进行测试
1、编辑web.xml文件,添加spring监听器配置项,内容如下:
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <listener> <description>Spring监听器</description> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- ContextLoaderListener初始化Spring上下文时需要使用到的contextConfigLocation参数 --> <context-param> <param-name>contextConfigLocation</param-name> <!-- 配置spring.xml和spring-mybatis.xml这两个配置文件的位置,固定写法 --> <param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value> </context-param> </web-app>
2、在UserMapper接口中添加一个获取所有用户信息的getAllUser()方法,如下所示:
package com.myl.dao; import java.util.List; import com.myl.domain.User; public interface UserMapper { int deleteByPrimaryKey(String userId); int insert(User record); int insertSelective(User record); User selectByPrimaryKey(String userId); int updateByPrimaryKeySelective(User record); int updateByPrimaryKey(User record); /** * 获取所有用户信息 * @Title: getAllUser * @return: List<User> */ List<User> getAllUser(); }
3、在UserMapper.xml文件中编写getAllUser()方法要执行的SQL语句,如下所示:
<?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.myl.dao.UserMapper" > <resultMap id="BaseResultMap" type="com.myl.domain.User" > <id column="user_id" property="userId" jdbcType="CHAR" /> <result column="user_name" property="userName" jdbcType="VARCHAR" /> <result column="user_birthday" property="userBirthday" jdbcType="DATE" /> <result column="user_salary" property="userSalary" jdbcType="DOUBLE" /> </resultMap> <sql id="Base_Column_List" > user_id, user_name, user_birthday, user_salary </sql> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" > select <include refid="Base_Column_List" /> from t_user where user_id = #{userId,jdbcType=CHAR} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.String" > delete from t_user where user_id = #{userId,jdbcType=CHAR} </delete> <insert id="insert" parameterType="com.myl.domain.User" > insert into t_user (user_id, user_name, user_birthday, user_salary) values (#{userId,jdbcType=CHAR}, #{userName,jdbcType=VARCHAR}, #{userBirthday,jdbcType=DATE}, #{userSalary,jdbcType=DOUBLE}) </insert> <insert id="insertSelective" parameterType="com.myl.domain.User" > insert into t_user <trim prefix="(" suffix=")" suffixOverrides="," > <if test="userId != null" > user_id, </if> <if test="userName != null" > user_name, </if> <if test="userBirthday != null" > user_birthday, </if> <if test="userSalary != null" > user_salary, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="userId != null" > #{userId,jdbcType=CHAR}, </if> <if test="userName != null" > #{userName,jdbcType=VARCHAR}, </if> <if test="userBirthday != null" > #{userBirthday,jdbcType=DATE}, </if> <if test="userSalary != null" > #{userSalary,jdbcType=DOUBLE}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="com.myl.domain.User" > update t_user <set > <if test="userName != null" > user_name = #{userName,jdbcType=VARCHAR}, </if> <if test="userBirthday != null" > user_birthday = #{userBirthday,jdbcType=DATE}, </if> <if test="userSalary != null" > user_salary = #{userSalary,jdbcType=DOUBLE}, </if> </set> where user_id = #{userId,jdbcType=CHAR} </update> <update id="updateByPrimaryKey" parameterType="com.myl.domain.User" > update t_user set user_name = #{userName,jdbcType=VARCHAR}, user_birthday = #{userBirthday,jdbcType=DATE}, user_salary = #{userSalary,jdbcType=DOUBLE} where user_id = #{userId,jdbcType=CHAR} </update> <!-- ==============以下内容是根据自身业务扩展的内容======================= --> <!-- select标签的id属性与UserMapper接口中定义的getAllUser方法要一模一样 --> <select id="getAllUser" resultMap="BaseResultMap"> select user_id, user_name, user_birthday, user_salary from t_user </select> </mapper>
4、在UserServiceI接口中也添加一个getAllUser()方法,如下:
package com.myl.service; import java.util.List; import com.myl.domain.User; public interface UserServiceI { /** * 添加用户 * @Title: addUser * @param: @param user * @return: void */ void addUser(User user); /** * 根据用户id获取用户 * @Title: getUserById * @param: @param id * @param: @return * @return: User */ User getUserById(String userId); /** * 获取所有用户信息 * @Title: getAllUser * @return: List<User> */ List<User> getAllUser(); }
5、在UserServiceImpl类中实现getAllUser方法,如下:
package com.myl.service.impl; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.myl.dao.UserMapper; import com.myl.domain.User; import com.myl.service.UserServiceI; /** * @author myl * @date 2018年5月6日 上午10:24:26 * 使用@Service注解将UserServiceImpl类标注为一个service * service的id是userService */ @Service("userService") public class UserServiceImpl implements UserServiceI { /** * 使用@Autowired注解标注userMapper变量, * 当需要使用UserMapper时,Spring就会自动注入UserMapper */ @Autowired private UserMapper userMapper;//注入dao public void addUser(User user) { userMapper.insert(user); } public User getUserById(String userId) { return userMapper.selectByPrimaryKey(userId); } public List<User> getAllUser() { return userMapper.getAllUser(); } }
6、在src/main/java目录下创建一个me.gacl.web.controller包,然后在me.gacl.web.controller下创建一个UserServlet,如下:
package com.myl.web.controller; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; import com.myl.domain.User; import com.myl.service.UserServiceI; /** * @author myl * @WebServlet是Servlet3.0提供的注解,目的是将一个继承了HttpServlet类的普通java类标注为一个Servlet * UserServlet使用了@WebServlet标注之后,就不需要在web.xml中配置了 */ @WebServlet("/UserServlet") public class UserServlet extends HttpServlet { //处理业务逻辑的userService @Autowired private UserServiceI userService; @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获取所有的用户信息 List<User> lstUsers = userService.getAllUser(); request.setAttribute("lstUsers", lstUsers); request.getRequestDispatcher("/index.jsp").forward(request, response); super.doGet(request, response); } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { super.doPost(request, response); } @Override public void init() throws ServletException { super.init(); ApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext()); userService = (UserServiceI) ac.getBean("userService"); } }
7、编辑index.jsp页面,用于展示查询到的用户信息,内容如下:
<%@page language="java" pageEncoding="utf-8" %> <%--引入jstl核心标签库 --%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html> <html> <head> <title>显示用户信息</title> <style type="text/css"> table,td{ border: 1px solid; border-collapse: collapse; } </style> </head> <body> <table> <tr> <td>用户ID</td> <td>用户名</td> <td>用户生日</td> <td>工资</td> </tr> <%--遍历lstUsers集合中的User对象 --%> <c:forEach var="user" items="${lstUsers}"> <tr> <td>${user.userId}</td> <td>${user.userName}</td> <td>${user.userBirthday}</td> <td>${user.userSalary}</td> </tr> </c:forEach> </table> </body> </html>
8、执行maven install命令编译项目,然后将项目部署到tomcat服务器中运行,注意,由于要使用Servlet3.0,所以必须将项目部署到tomcat8.5服务器中去运行,如下所示:
输入地址:http://localhost:8080/spring4-mybatis3/UserServlet 访问UserServlet,访问结果如下:
可以看到,t_user表中的用户信息全部查询出来显示到页面上了。这样在web服务器中的测试也正常通过了。
以上就是Spring4.x与MyBatis3.x整合的全部内容了。如果遇到执行Maven install操作不能正常编译通过的情况:可以尝试采用:Maven clean→Clean项目→Maven install这三个步骤去解决问题
该项目参考大神博文,如有如有问题,欢迎提出。