package com.andy.database;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.ResourceBundle;
/**
* 數據庫連接工具
* @author andy
*
*/
public class ConnectionUtils {
/**
* @return
*/
public static Connection getConnection(String properties_nam,String url_key,String driver_key,String username_key,String password_key) {
HashMap<String,String> map = passProperties(properties_nam);
String url = map.get(url_key);
String driver = map.get(driver_key);
String username = map.get(username_key);
String password = map.get(password_key);
Connection conn = null;
try {
Class.forName(driver);
conn = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
e.printStackTrace();
return null;
}
return conn;
}
/**
* 解析文件
* @return
*/
public static HashMap<String,String> passProperties(String properties_name) {
HashMap<String,String> map = new HashMap<String, String>();
ResourceBundle config = ResourceBundle.getBundle(properties_name);
Enumeration<String> enu = config.getKeys();
if(enu != null){
while(enu.hasMoreElements()){
String key = (String)enu.nextElement();
String value = config.getString(key);
map.put(key, value);
}
}
return map;
}
/**
* 關閉連接
* @param rs
* @param stat
* @param conn
*/
public static void close(ResultSet rs, Statement stat,Connection conn) {
if(rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(stat != null) {
try {
stat.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
數據庫連接代碼片段
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