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spring数据源
包含三部分内容
1.spring jdbc
2. spring datasource
3.spring Connection pooling
完整的项目请往百度云盘下载：
测试方法
package com.guo.dataSourceDemo;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import com.alibaba.druid.pool.DruidDataSource;
public class JunitCase {
@Test// 1.spring jdbc
public void test(){
// a.连接字符串
String url = "jdbc:mysql://localhost:3306/yun?characterEncoding=UTF8"
+ "&user=root&password=centos"
+ "&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&tinyInt1isBit=false";
Connection con = null;
Statement stmt = null;
ResultSet result = null;
try {
// b.注册驱动
Class.forName("com.mysql.jdbc.Driver");
// c.获取连接
con = DriverManager.getConnection(url);
// d.获取句柄
stmt = con.createStatement();
String query = "select * from eac_core_biz";
// e.执行语句
result = stmt.executeQuery(query);
// f.获取结果
while(result.next()){
String id = result.getString(1);
String biz = result.getString(2);
String name = result.getString(3);
System.out.println("id:"+id+",biz:"+biz+",name:"+name);
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}finally{
// g.关闭连接
closeResultSet(result);
closeStatement(stmt);
closeConnection(con);
}
}
@Test //2. spring datasource
public void test1(){
ApplicationContext context = new ClassPathXmlApplicationContext("context.xml");
DriverManagerDataSource ds = (DriverManagerDataSource) context.getBean("dataSource");
Connection con = null;
Statement stmt = null;
ResultSet result = null;
try {
con = ds.getConnection();
stmt = con.createStatement();
String query = "select * from eac_core_biz";
result = stmt.executeQuery(query);
while(result.next()){
String id = result.getString(1);
String biz = result.getString(2);
String name = result.getString(3);
System.out.println("id:"+id+",biz:"+biz+",name:"+name);
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
closeResultSet(result);
closeStatement(stmt);
closeConnection(con);
}
}
@Test //3.spring Connection pooling
public void test2(){
ApplicationContext context = new ClassPathXmlApplicationContext("spring-pool.xml");
DruidDataSource ds = (DruidDataSource) context.getBean("dataSource");
Connection con = null;
Statement stmt = null;
ResultSet result = null;
try {
con = ds.getConnection();
stmt = con.createStatement();
String query = "select * from eac_core_biz";
result = stmt.executeQuery(query);
while(result.next()){
String id = result.getString(1);
String biz = result.getString(2);
String name = result.getString(3);
System.out.println("id:"+id+",biz:"+biz+",name:"+name);
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
closeResultSet(result);
closeStatement(stmt);
closeConnection(con);
}
}
public void closeResultSet(ResultSet result){
if(result!=null){
try {
result.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public void closeStatement(Statement stmt){
if(stmt!=null){
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public void closeConnection(Connection con){
if(con!=null){
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
application.properties
jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://127.0.0.1:3306/yun jdbc.username=root jdbc.password=centos
context.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd "> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="http://www.mamicode.com/com.mysql.jdbc.Driver" /> <property name="url" value="http://www.mamicode.com/jdbc:mysql://localhost:3306/yun?characterEncoding=UTF8" /> <property name="username" value="http://www.mamicode.com/root" /> <property name="password" value="http://www.mamicode.com/centos" /> </bean> </beans>
spring-pool.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd "> <bean id="propertyConfigure" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>application.properties</value> </list> </property> </bean> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="driverClassName" value="http://www.mamicode.com/${jdbc.driverClassName}" /> <property name="url" value="http://www.mamicode.com/${jdbc.url}" /> <property name="username" value="http://www.mamicode.com/${jdbc.username}" /> <property name="password" value="http://www.mamicode.com/${jdbc.password}" /> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="http://www.mamicode.com/1" /> <property name="minIdle" value="http://www.mamicode.com/1" /> <property name="maxActive" value="http://www.mamicode.com/10" /> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait" value="http://www.mamicode.com/10000" /> <!-- 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="http://www.mamicode.com/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="http://www.mamicode.com/300000" /> <property name="testWhileIdle" value="http://www.mamicode.com/true" /> <!-- 这里建议配置为TRUE，防止取到的连接不可用 --> <property name="testOnBorrow" value="http://www.mamicode.com/true" /> <property name="testOnReturn" value="http://www.mamicode.com/false" /> <!-- 打开PSCache，并且指定每个连接上PSCache的大小 --> <property name="poolPreparedStatements" value="http://www.mamicode.com/true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="http://www.mamicode.com/20" /> <!-- 这里配置提交方式，默认就是TRUE，可以不用配置 --> <property name="defaultAutoCommit" value="http://www.mamicode.com/true" /> <!-- 验证连接有效与否的SQL，不同的数据配置不同 --> <property name="validationQuery" value="http://www.mamicode.com/select 1" /> <property name="filters" value="http://www.mamicode.com/stat" /> <property name="proxyFilters"> <list> <ref bean="logFilter" /> </list> </property> </bean> <bean id="logFilter" class="com.alibaba.druid.filter.logging.Slf4jLogFilter"> <property name="statementExecutableSqlLogEnable" value="http://www.mamicode.com/false" /> </bean> </beans>
spring数据源
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