import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DBUtil {
private static final String DRIVER="com.mysql.jdbc.Driver";
private static final String DRIVER_URL="jdbc:mysql://127.0.0.1:3306/MyTable";
private static final String DRIVER_USER="root";
private static final String DRIVER_PWD="123";
protected Connection conn=null;
protected PreparedStatement pst=null;
protected ResultSet rs=null;
//配置驱动
static{
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
//链接数据库
public static Connection getConnection (){
Connection conn=null;
try {
conn=DriverManager.getConnection(DRIVER_URL, DRIVER_USER, DRIVER_PWD);
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
//查询
public ResultSet commonQuery(String sql,Object...params) throws SQLException{
conn=getConnection();
pst=conn.prepareStatement(sql);
if(params !=null && params.length>0){
setValue(pst,params);
}
rs=pst.executeQuery();
return rs;
}
//增删改
public int commonUpdate(String sql,Object...params) throws SQLException{
int result =0;
conn=getConnection();
try {
pst=conn.prepareStatement(sql);
if(params !=null && params.length>0){
setValue(pst,params);
}
result=pst.executeUpdate();
}finally{
closeAll(conn, pst, rs);
}
return result;
}
private void setValue(PreparedStatement pst2, Object[] params) throws SQLException {
for(int i=0;i<params.length;i++){
pst2.setObject(i+1, params[i]);
}
}
//关闭数据库
public void closeAll(Connection conn,PreparedStatement pst,ResultSet rs){
try {
if(rs !=null){
rs.close();
}
if(pst !=null){
pst.close();
}
if(conn !=null){
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
JDBC例子之MySQL篇
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转载自blog.csdn.net/YAN_HUAXIANGMO/article/details/77651991
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