c3p0数据源连接数据库
2015-10-05 18:19
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c3p0数据库连接池
相关jar包
c3p0-0.9.1.2.jar
mysql数据库的驱动包!
配置文件
c3p0-config.xml
文件内容
<?xml version="1.0" encoding="UTF-8"?>
<c3p0-config>
<named-config name="javawebapp">
<property name="user">root</property>
<property name="password">root</property>
<property name="jdbcUrl">jdbc:mysql://localhost:3306/bookstore</property>
<property name="driverClass">com.mysql.jdbc.Driver</property>
<property name="acquireIncrement">2</property>
<property name="initialPoolSize">5</property>
<property name="minPoolSize">5</property>
<property name="maxPoolSize">10</property>
<property name="maxStatements">20</property>
<property name="maxStatementsPerConnection">5</property>
</named-config>
</c3p0-config>
java代码
package com.utils;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.sql.DataSource;
import com.exception.DBException;
import com.mchange.v2.c3p0.ComboPooledDataSource;
/**
*
* JDBC 的工具类
*
*/
public class JDBCUtils {
private static DataSource dataSource = null;
private static Connection conn = null;
static{
dataSource = new ComboPooledDataSource("javawebapp");
}
//获取数据库连接
public static Connection getConnection(){
try {
conn = dataSource.getConnection();
if(conn!=null){
System.out.println("数据库连接成功");
}
return conn;
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
}
//关闭数据库连接
public static void release(Connection connection) {
try {
if(connection != null){
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
}
//关闭数据库连接
public static void release(ResultSet rs, Statement statement) {
try {
if(rs != null){
rs.close();
}
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
try {
if(statement != null){
statement.close();
}
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
}
}
相关jar包
c3p0-0.9.1.2.jar
mysql数据库的驱动包!
配置文件
c3p0-config.xml
文件内容
<?xml version="1.0" encoding="UTF-8"?>
<c3p0-config>
<named-config name="javawebapp">
<property name="user">root</property>
<property name="password">root</property>
<property name="jdbcUrl">jdbc:mysql://localhost:3306/bookstore</property>
<property name="driverClass">com.mysql.jdbc.Driver</property>
<property name="acquireIncrement">2</property>
<property name="initialPoolSize">5</property>
<property name="minPoolSize">5</property>
<property name="maxPoolSize">10</property>
<property name="maxStatements">20</property>
<property name="maxStatementsPerConnection">5</property>
</named-config>
</c3p0-config>
java代码
package com.utils;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.sql.DataSource;
import com.exception.DBException;
import com.mchange.v2.c3p0.ComboPooledDataSource;
/**
*
* JDBC 的工具类
*
*/
public class JDBCUtils {
private static DataSource dataSource = null;
private static Connection conn = null;
static{
dataSource = new ComboPooledDataSource("javawebapp");
}
//获取数据库连接
public static Connection getConnection(){
try {
conn = dataSource.getConnection();
if(conn!=null){
System.out.println("数据库连接成功");
}
return conn;
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
}
//关闭数据库连接
public static void release(Connection connection) {
try {
if(connection != null){
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
}
//关闭数据库连接
public static void release(ResultSet rs, Statement statement) {
try {
if(rs != null){
rs.close();
}
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
try {
if(statement != null){
statement.close();
}
} catch (SQLException e) {
e.printStackTrace();
throw new DBException("数据库连接错误!");
}
}
}
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