JDBC直链实例代码

java 代码

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class JDBCOperation {
   private String dbUrl="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=contract;User=sa;Password=sa";
   public   JDBCOperation() throws ClassNotFoundException{
       Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
   }
   public Connection getConnection() throws SQLException{
       return java.sql.DriverManager.getConnection(dbUrl);
   }
   public void businessService(int id) {
       Connection conn=null;
       PreparedStatement  ps=null;
       ResultSet rs=null;
       try {
        conn=this.getConnection();
        //开始一个事务；
        conn.setAutoCommit(false);
        //一下是你的业务代码
        ps=conn.prepareStatement("select * from test where id=?");
       //一般来说preparedStatement对象是用来处理重复处理的sql语句的，只有参数发生变化而已
       //例如：
       
    
     java 代码
 
    ps=conn.prepareStatement("updata contrat (name) values(?)");
for(int i ;i<10;i++){
     ps.setString(1, id);
     ps.executeUpdata();
}        //
       //
        ps.setInt(1, id);
        ps.executeQuery();
        conn.commit();
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        try {
            conn.rollback();
        } catch (SQLException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
    }finally{
        try {
            rs.close();
            ps.close();
            conn.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
   }
}