Spring框架进阶3
Posted XDZY
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Spring框架进阶3
测试spring_jdbc和spring对事务的管理
先配置相应的pom
<?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.spring</groupId> <artifactId>spring_3</artifactId> <version>1.0-SNAPSHOT</version> <!-- 属性 --> <properties> <!-- 设置编译版本为1.7 --> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> <!-- 可以绑定版本号 --> <spring.version>4.3.5.RELEASE</spring.version> </properties> <!-- 锁定版本，struts2-2.3.24、spring4.2.4、hibernate5.0.7 --> <dependencyManagement> <dependencies> <!-- 核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <!-- pring IOC的基础实现，包含访问配置文件、创建和管理bean等 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> </dependencies> </dependencyManagement> <!-- 依赖管理 --> <dependencies> <!-- spring相关包 --> <!-- 核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> </dependency> <!-- pring IOC的基础实现，包含访问配置文件、创建和管理bean等 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> </dependency> <!-- 数据库驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> <scope>runtime</scope> </dependency> <!-- c3p0 --> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> </dependency> <!-- junit,4.12支持注解测试 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- aop联盟 --> <dependency> <groupId>org.aopalliance</groupId> <artifactId>com.springsource.org.aopalliance</artifactId> <version>1.0.0</version> </dependency> <!-- weaver织入包 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>com.springsource.org.aspectj.weaver</artifactId> <version>1.6.4.RELEASE</version> </dependency> </dependencies> </project>
相应的连接池和配置文件
#加jdbc前缀的目的是为了避免后面的名字与其他地方名字冲突 jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf-8 jdbc.username=root jdbc.password=admins
<?xml version="1.0" encoding="UTF-8"?> <!-- 头部约束的作用：beans：最基本；context：读取资源文件；aop：配置aop；tx：配置事务通知 --> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd "> <!-- 读取连接池配置文件 --> <context:property-placeholder location="jdbc.properties"/> <!-- 1.将连接池放入spring容器 --> <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!-- set注入 --> <!--<property name="driverClass" value="com.mysql.jdbc.Driver"/> <property name="jdbcUrl" value="jdbc:mysql:///test"/> <property name="user" value="root"/> <property name="password" value="admins"/>--> <!-- 资源文件配置 --> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean> <!-- 2.将JdbcTemplate放入spring容器 --> <bean name="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource" ref="dataSource"/> </bean> <!-- 3.将UserDao放入spring容器 --> <bean name="userDao" class="com.dao.UserDaoImpl"> <property name="jt" ref="jdbcTemplate"/> </bean> <!-- 无需依赖JdbcTemplate --> <!-- 2.AccountDao放入spring容器 --> <bean name="accountDao" class="com.dao.AccountDaoImpl"> <property name="dataSource" ref="dataSource"/> </bean> <!-- 3.AccountService放入spring容器 --> <bean name="accountService" class="com.service.AccountServiceImpl"> <property name="dao" ref="accountDao"/> <property name="template" ref="transactionTemplate"/> </bean> <!-- 3种事务管理方式 --> <!-- 事务核心管理器，封装了事务的所有操作，依赖连接池 --> <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 依赖注入 --> <property name="dataSource" ref="dataSource"/> </bean> <!-- 1:编码方式；事务模板对象 --> <bean name="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate"> <property name="transactionManager" ref="transactionManager"/> </bean> <!-- 2:xml配置；配置事务通知 --> <tx:advice transaction-manager="transactionManager" id="txAdvice"> <tx:attributes> <!-- isolation：隔离级别；propagation：传播行为 ；read-only：只读--> <!-- 以方法名为单位进行配置 --> <tx:method name="transfer" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/> <!-- 通常都会加通配符进行配置 --> <tx:method name="save*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/> <tx:method name="persist*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/> <tx:method name="update*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/> <tx:method name="modify*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/> <tx:method name="delete*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/> <tx:method name="remove*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/> <tx:method name="get*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/> <tx:method name="find*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/> </tx:attributes> </tx:advice> <!-- 配置织入 --> <aop:config> <!-- 目标对象 --> <aop:pointcut id="txPc" expression="execution(* com.service.*ServiceImpl.*(..))"/> <!-- 配置切面：advice-ref：通知；pointcut-ref：切入点 --> <aop:advisor advice-ref="txAdvice" pointcut-ref="txPc"/> </aop:config> <!-- 开启使用注解管理aop事务 --> <tx:annotation-driven/> </beans>
数据库不提供了，先来个bean
package com.bean; /** * @author: XDZY * @date: 2018/9/9 14:55 * @description: 实体bean */ public class User { private int id; private String name; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "User{" + "id=" + id + ", name=\'" + name + \'\\\'\' + \'}\'; } }
测试jdbc模板
package com.dao; import com.bean.User; import java.util.List; /** * @author: XDZY * @date: 2018/9/9 14:56 * @description: 操作user接口 */ public interface UserDao { /** * 增 * * @param user */ void save(User user); /** * 根据用户ID删除 * * @param id */ void delUserById(Integer id); /** * 改 * * @param user */ void update(User user); /** * 根据用户ID查询 * * @param id * @return */ User findUserById(Integer id); /** * 查询用户数量 * * @return */ int findCount(); /** * 查询所有用户 * * @return */ List<User> findUserList(); }
package com.dao; import com.bean.User; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; /** * @author: XDZY * @date: 2018/9/9 15:02 * @description: 使用jdbc模板实现增删改查 */ public class UserDaoImpl implements UserDao { private JdbcTemplate jt; public void setJt(JdbcTemplate jt) { this.jt = jt; } @Override public void save(User user) { String sql = "insert into user_info values(0,?)"; jt.update(sql, user.getName()); } @Override public void delUserById(Integer id) { String sql = "delete from user_info where id=?"; jt.update(sql, id); } @Override public void update(User user) { String sql = "update user_info set name=? where id=?"; jt.update(sql, user.getName(), user.getId()); } @Override public User findUserById(Integer id) { String sql = "select * from user_info where id=?"; return jt.queryForObject(sql, new RowMapper<User>() {//匿名内部类 //ResultSet：结果集；int i：第几行，即第几个数据 @Override public User mapRow(ResultSet rs, int i) throws SQLException { User user = new User(); user.setId(rs.getInt("id")); user.setName(rs.getString("name")); return user; } }, id); } @Override public int findCount() { String sql = "select count(*) from user_info"; Integer count = jt.queryForObject(sql, Integer.class); return count; } @Override public List<User> findUserList() { String sql = "select * from user_info"; List<User> list = jt.query(sql, new RowMapper<User>() { @Override public User mapRow(ResultSet rs, int i) throws SQLException { User user = new User(); user.setId(rs.getInt("id")); user.setName(rs.getString("name")); return user; } }); return list; } }
package com.jabcDemo; import com.bean.User; import com.dao.UserDao; import com.mchange.v2.c3p0.ComboPooledDataSource; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import javax.annotation.Resource; /** * @author: XDZY * @date: 2018/9/9 13:50 * @description: 演示jdbc模板 */ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContext.xml") public class Demo { @Resource(name = "userDao") private UserDao userDao; @Test public void test() throws Exception { //准备连接池 ComboPooledDataSource dataSource = new ComboPooledDataSource(); dataSource.setDriverClass("com.mysql.jdbc.Driver"); dataSource.setJdbcUrl("jdbc:mysql:///test"); dataSource.setUser("root"); dataSource.setPassword("admins"); //创建jdbc模板对象 JdbcTemplate jt = new JdbcTemplate(); jt.setDataSource(dataSource); //书写sql，并执行 String sql = "insert into user_info values(0,\'day\')"; jt.update(sql); } @Test public void test1() throws Exception { User user = new User(); user.setName("tom"); userDao.save(user); } @Test public void test2() throws Exception { User u = new User(); u.setId(2); u.setName("jack"); userDao.update(u); } @Test public void fun4() throws Exception { userDao.delUserById(2); } @Test public void fun5() throws Exception { System.out.println(userDao.findCount()); } @Test public void fun6() throws Exception { System.out.println(userDao.findUserById(1)); } @Test public void fun7() throws Exception { System.out.println(userDao.findUserList()); } }
测试事务管理方式
package com.dao; /** * @author: XDZY * @date: 2018/9/9 16:54 * @description: 事务的操作 */ public interface AccountDao { /** * 加钱 * * @param id * @param money */ void increaseMoney(Integer id, double money); /** * 减钱 * * @param id * @param money */ void decreaseMoney(Integer id, double money); }
package com.dao; import org.springframework.jdbc.core.support.JdbcDaoSupport; /** * @author: XDZY * @date: 2018/9/9 16:57 * @description: 不用jdbc模板，扩展知识(继承JdbcDaoSupport直接依赖连接池就行) */ public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao { @Override public void increaseMoney(Integer id, double money) { getJdbcTemplate().update("update t_acount set money=money+? where id=?", money, id); } @Override public void decreaseMoney(Integer id, double money) { getJdbcTemplate().update("update t_acount set money=money-? where id=?", money, id); } }
package com.service; /** * @author: XDZY * @date: 2018/9/9 17:03 * @description: 逻辑运算 */ public interface AccountService { /** * 转账方法 * * @param from * @param to * @param money */ void transfer(Integer from, Integer to, double money); }
package com.service; import com.dao.AccountDao; import org.springframework.transaction.annotation.Isolation; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import org.springframework.transaction.support.TransactionTemplate; /** * @author: XDZY * @date: 2018/9/9 17:06 * @description: 逻辑运算 * 注解也可以加在类上；个别情况个别写 */ @Transactional(isolation = Isolation.REPEATABLE_READ, propagation = Propagation.REQUIRED, readOnly = true) public class AccountServiceImpl implements AccountService { private AccountDao dao; /** * 事务模板 */ private TransactionTemplate template; public void setDao(AccountDao dao) { this.dao = dao; } public void setTemplate(TransactionTemplate template) { this.template = template; } //转账操作；匿名内部类要访问外部数据要加final //事务模板已经封装好，只需提供操作 //模板过程（1.打开事务 2.调用doInTransactionWithoutResult方法 3.提交事务） /*@Override public void transfer(final Integer from,final Integer to,final double money) { //根据不同的模板调用相应的接口 //不同的框架对事务的操作是不同的，但是事务的操作流程是一样的；所以spring提供接口来管理事务 template.execute(new TransactionCallbackWithoutResult() { //实现对事务的管理 @Override protected void doInTransactionWithoutResult(TransactionStatus transactionStatus) { //减钱 dao.decreaseMoney(from,money); //制造异常，测试事务是否有效；就是出现异常还会不会转钱 //int i=1/0; //加钱 dao.increaseMoney(to,money); } }); }*/ //xml方式管理事务 //注解方式管理事务 @Override @Transactional(isolation = Isolation.REPEATABLE_READ, propagation = Propagation.REQUIRED, readOnly = false) public void transfer(Integer from, Integer to, double money) { //减钱 dao.decreaseMoney(from, money); //制造异常，测试事务是否有效；就是出现异常还会不会转钱 //int i=1/0; //加钱 dao.increaseMoney(to, money); } }
package com.jabcDemo; import com.service.AccountService; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import javax.annotation.Resource; /** * @author: XDZY * @date: 2018/9/9 13:50 * @description: 事务的操作 */ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContext.xml") public class Demo2 { @Resource(name = "accountService") private AccountService as; @Test public void test() { //1给2转账500元 as.transfer(1, 2, 500d); } }
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