java 连接mysql工具类_java连接Mysql数据库的工具类
一個封裝好的鏈接Mysql數據庫的工具類，可以方便的獲取Connection對象關閉Statement、ResultSet、Statment對象等等
復制代碼 代碼如下:
package myUtil;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
* 鏈接mysql數據庫
* @author weichk
*/
public class MysqlDbManager {
private static final String URL = "jdbc:mysql://127.0.0.1:3306/openfire";
private static final String USER = "root";
private static final String PASSWORD = "123456";
static {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
System.out.println("加載Mysql數據庫驅動失敗！");
}
}
/**
* 獲取Connection
*
* @return
* @throws SQLException
* @throws ClassNotFoundException
*/
public static Connection getConnection() throws SQLException {
Connection conn = null;
try {
conn = DriverManager.getConnection(URL, USER, PASSWORD);
} catch (SQLException e) {
System.out.println("獲取數據庫連接失敗！");
throw e;
}
return conn;
}
/**
* 關閉ResultSet
* @param rs
*/
public static void closeResultSet(ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
System.out.println(e.getMessage());
}
}
}
/**
* 關閉Statement
* @param stmt
*/
public static void closeStatement(Statement stmt) {
if (stmt != null) {
try {
stmt.close();
}
catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
/**
* 關閉ResultSet、Statement
* @param rs
* @param stmt
*/
public static void closeStatement(ResultSet rs, Statement stmt) {
closeResultSet(rs);
closeStatement(stmt);
}
/**
* 關閉PreparedStatement
* @param pstmt
* @throws SQLException
*/
public static void fastcloseStmt(PreparedStatement pstmt) throws SQLException
{
pstmt.close();
}
/**
* 關閉ResultSet、PreparedStatement
* @param rs
* @param pstmt
* @throws SQLException
*/
public static void fastcloseStmt(ResultSet rs, PreparedStatement pstmt) throws SQLException
{
rs.close();
pstmt.close();
}
/**
* 關閉ResultSet、Statement、Connection
* @param rs
* @param stmt
* @param con
*/
public static void closeConnection(ResultSet rs, Statement stmt, Connection con) {
closeResultSet(rs);
closeStatement(stmt);
closeConnection(con);
}
/**
* 關閉Statement、Connection
* @param stmt
* @param con
*/
public static void closeConnection(Statement stmt, Connection con) {
closeStatement(stmt);
closeConnection(con);
}
/**
* 關閉Connection
* @param con
*/
public static void closeConnection(Connection con) {
if (con != null) {
try {
con.close();
}
catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
}
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