maven包：
1 <properties> 2 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 3 <maven.compiler.source>1.7</maven.compiler.source> 4 <maven.compiler.target>1.7</maven.compiler.target> 5 <spring.version>4.3.24.RELEASE</spring.version> 6 </properties> 7 8 <dependencies> 9 <dependency> 10 <groupId>junit</groupId> 11 <artifactId>junit</artifactId> 12 <version>4.11</version> 13 <scope>test</scope> 14 </dependency> 15 <!-- Spring --> 16 <dependency> 17 <groupId>org.springframework</groupId> 18 <artifactId>spring-core</artifactId> 19 <version>${spring.version}</version> 20 </dependency> 21 <dependency> 22 <groupId>org.springframework</groupId> 23 <artifactId>spring-context</artifactId> 24 <version>${spring.version}</version> 25 </dependency> 26 <dependency> 27 <groupId>org.springframework</groupId> 28 <artifactId>spring-web</artifactId> 29 <version>${spring.version}</version> 30 </dependency> 31 <dependency> 32 <groupId>org.springframework</groupId> 33 <artifactId>spring-context-support</artifactId> 34 <version>${spring.version}</version> 35 </dependency> 36 <dependency> 37 <groupId>org.springframework</groupId> 38 <artifactId>spring-webmvc</artifactId> 39 <version>${spring.version}</version> 40 </dependency> 41 <dependency> 42 <groupId>org.springframework</groupId> 43 <artifactId>spring-test</artifactId> 44 <version>${spring.version}</version> 45 </dependency> 46 <!-- aop --> 47 <dependency> 48 <groupId>org.springframework</groupId> 49 <artifactId>spring-aop</artifactId> 50 <version>${spring.version}</version> 51 </dependency> 52 <dependency> 53 <groupId>org.aspectj</groupId> 54 <artifactId>aspectjweaver</artifactId> 55 <version>1.8.13</version> 56 </dependency> 57 <dependency> 58 <groupId>cglib</groupId> 59 <artifactId>cglib</artifactId> 60 <version>3.2.4</version> 61 </dependency> 62 <!-- spring jdbc --> 63 <dependency> 64 <groupId>mysql</groupId> 65 <artifactId>mysql-connector-java</artifactId> 66 <version>5.1.47</version> 67 </dependency> 68 <dependency> 69 <groupId>org.springframework</groupId> 70 <artifactId>spring-jdbc</artifactId> 71 <version>${spring.version}</version> 72 </dependency> 73 <dependency> 74 <groupId>org.springframework</groupId> 75 <artifactId>spring-tx</artifactId> 76 <version>${spring.version}</version> 77 </dependency> 78 <!-- C3p0--> 79 <dependency> 80 <groupId>com.mchange</groupId> 81 <artifactId>c3p0</artifactId> 82 <version>0.9.5.4</version> 83 </dependency> 84 </dependencies>
applicationContext.xml：
C3p0连接配置：
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" 4 xmlns:tx="http://www.springframework.org/schema/tx" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> 6 7 8 <!-- 配置Jdbc模板--> 9 <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> 10 <property name="dataSource" ref="dataSource"></property> 11 </bean> 12 13 <bean id="userDao" class="com.etc.dao.UserDAO"> 14 <property name="jdbcTemplate" ref="jdbcTemplate"></property> 15 </bean> 16 17 <bean id="bankDao" class="com.etc.dao.BankDao"> 18 <property name="jdbcTemplate" ref="jdbcTemplate"></property> 19 </bean> 20 21 <bean id="bankServiceImpl" class="com.etc.service.serviceImpl.BankServiceImpl"> 22 <property name="bankDao" ref="bankDao"></property> 23 </bean> 24 25 26 <!--基于数据源的事务管理器，通过属性引用数据源--> 27 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 28 <property name="dataSource" ref="dataSource"></property> 29 </bean> 30 <aop:config> 31 <aop:pointcut expression="execution(* com.etc.service.*.*(..))" id="pc"/> 32 <aop:advisor advice-ref="txAdvice" pointcut-ref="pc"/> 33 </aop:config> 34 35 <tx:advice id="txAdvice" transaction-manager="transactionManager"> 36 <tx:attributes> 37 <tx:method name="*"/> 38 </tx:attributes> 39 </tx:advice> 40 41 <!-- 配置数据源 --> 42 <bean id="dataSource" 43 class="com.mchange.v2.c3p0.ComboPooledDataSource" 44 destroy-method="close"> 45 <property name="driverClass"> 46 <value>com.mysql.jdbc.Driver</value> 47 </property> 48 <property name="jdbcUrl"> 49 <value>jdbc:mysql://localhost:3310/day07?characterEncoding=UTF-8</value> 50 </property> 51 <property name="user"> 52 <value>root</value> 53 </property> 54 <property name="password"> 55 <value>123456</value> 56 </property> 57 58 <!--连接池中保留的最小连接数。--> 59 <property name="minPoolSize"> 60 <value>5</value> 61 </property> 62 63 <!--连接池中保留的最大连接数。Default: 15 --> 64 <property name="maxPoolSize"> 65 <value>30</value> 66 </property> 67 68 <!--初始化时获取的连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3 --> 69 <property name="initialPoolSize"> 70 <value>10</value> 71 </property> 72 73 <!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 --> 74 <property name="maxIdleTime"> 75 <value>60</value> 76 </property> 77 78 <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 --> 79 <property name="acquireIncrement"> 80 <value>5</value> 81 </property> 82 83 <!--JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements 84 属于单个connection而不是整个连接池。所以设置这个参数需要考虑到多方面的因素。 85 如果maxStatements与maxStatementsPerConnection均为0，则缓存被关闭。Default: 0--> 86 <property name="maxStatements"> 87 <value>0</value> 88 </property> 89 90 <!--每60秒检查所有连接池中的空闲连接。Default: 0 --> 91 <property name="idleConnectionTestPeriod"> 92 <value>60</value> 93 </property> 94 95 <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 --> 96 <property name="acquireRetryAttempts"> 97 <value>30</value> 98 </property> 99 100 <!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 101 保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试 102 获取连接失败后该数据源将申明已断开并永久关闭。Default: false--> 103 <property name="breakAfterAcquireFailure"> 104 <value>true</value> 105 </property> 106 107 <!--因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的 108 时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable 109 等方法来提升连接测试的性能。Default: false --> 110 <property name="testConnectionOnCheckout"> 111 <value>false</value> 112 </property> 113 </bean> 114 </beans>
userDao
1 package com.etc.dao; 2 3 import com.etc.entity.User; 4 import org.springframework.jdbc.core.JdbcTemplate; 5 import org.springframework.jdbc.core.RowMapper; 6 7 import java.sql.ResultSet; 8 import java.sql.SQLException; 9 import java.util.List; 10 11 public class UserDAO { 12 13 private JdbcTemplate jdbcTemplate; 14 15 public void save() { 16 jdbcTemplate.execute("insert into t_user (username,password) values ('3','4')"); 17 } 18 19 20 public List<User> queryAll() { 21 return jdbcTemplate.query("select * from t_user", new RowMapper<User>() { 22 @Override 23 public User mapRow(ResultSet resultSet, int i) throws SQLException { 24 return result(resultSet); 25 } 26 }); 27 } 28 29 public User query(User user) { 30 return jdbcTemplate.queryForObject("select * from t_user where id=?", new Object[]{user.getId()}, new RowMapper<User>() { 31 @Override 32 public User mapRow(ResultSet resultSet, int i) throws SQLException { 33 return result(resultSet); 34 } 35 }); 36 } 37 38 39 public static User result(ResultSet resultSet) throws SQLException { 40 User user = new User(); 41 user.setId(resultSet.getInt("id")); 42 user.setUsername(resultSet.getString("username")); 43 user.setPassword(resultSet.getString("password")); 44 return user; 45 } 46 47 48 public JdbcTemplate getJdbcTemplate() { 49 return jdbcTemplate; 50 } 51 52 public void setJdbcTemplate(JdbcTemplate jdbcTemplate) { 53 this.jdbcTemplate = jdbcTemplate; 54 } 55 }