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Druid连接池的工具类


import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

/**
* Druid连接池的工具类
*/
public class JDBCUtils {

//1.定义成员变量 DataSource数据库连接池
private static DataSource ds ;

static{
try {
//1.加载配置文件
Properties pro = new Properties();
pro.load(JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties"));
//2.获取DataSource
ds = DruidDataSourceFactory.createDataSource(pro);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 获取连接
*/
public static Connection getConnection() throws SQLException {
return ds.getConnection();
}

/**
* 释放资源
*/
public static void close(Statement stmt,Connection conn){
/* if(stmt != null){
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}

if(conn != null){
try {
conn.close();//归还连接
} catch (SQLException e) {
e.printStackTrace();
}
}*/

close(null,stmt,conn);
}


public static void close(ResultSet rs , Statement stmt, Connection conn){


if(rs != null){
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}


if(stmt != null){
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}

if(conn != null){
try {
conn.close();//归还连接
} catch (SQLException e) {
e.printStackTrace();
}
}
}

/**
* 获取连接池方法
*/

public static DataSource getDataSource(){
return ds;
}

}

 

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