String ab = (String)application.getAttribute("usn");
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
Connection ct = DriverManager.getConnection
("jdbc:sqlserver://127.0.0.1:1433;DatabaseName=das","sa","mao");
Statement sm = ct.createStatement();
//ResultSet rs = sm.executeQuery("select youId from yonghu where name='"+u+"'");
ResultSet win = sm.executeQuery("select win from yonghu where name='"+ab+"'");
ResultSet lose = sm.executeQuery("select lose from yonghu where name='"+ab+"'");
win.next();
lose.next();
out.print(win.getInt(1) + lose.getInt(1));
程序到win.next();这里 报错。。
说是
javax.servlet.ServletException: com.microsoft.sqlserver.jdbc.SQLServerException: 结果集已关闭。
为什么 我只想把转换下!!!
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
Connection ct = DriverManager.getConnection
("jdbc:sqlserver://127.0.0.1:1433;DatabaseName=das","sa","mao");
Statement sm = ct.createStatement();
//ResultSet rs = sm.executeQuery("select youId from yonghu where name='"+u+"'");
ResultSet win = sm.executeQuery("select win from yonghu where name='"+ab+"'");
ResultSet lose = sm.executeQuery("select lose from yonghu where name='"+ab+"'");
win.next();
lose.next();
out.print(win.getInt(1) + lose.getInt(1));
程序到win.next();这里 报错。。
说是
javax.servlet.ServletException: com.microsoft.sqlserver.jdbc.SQLServerException: 结果集已关闭。
为什么 我只想把转换下!!!
package com.bjsxt.bbs;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class DB {
public static Connection getConn() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/bbs", "root" , "123456");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
public static Statement createStmt(Connection conn) {
Statement stmt = null;
try {
stmt = conn.createStatement();
} catch (SQLException e) {
e.printStackTrace();
}
return stmt;
}
public static ResultSet executeQuery(Statement stmt, String sql) {
ResultSet rs = null;
try {
rs = stmt.executeQuery(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return rs;
}
/*public static ResultSet executeQuery(Connection conn, String sql) {
Statement stmt = null;
ResultSet rs = null;
try {
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
} catch (SQLException e) {
e.printStackTrace();
}
// finally {
// close(stmt);
// }
return rs;
}*/
public static int executeUpdate(Connection conn, String sql) {
int ret = 0;
Statement stmt = null;
try {
stmt = conn.createStatement();
ret = stmt.executeUpdate(sql);
} catch (SQLException e) {
e.printStackTrace();
} finally {
close(stmt);
}
return ret;
}
public static PreparedStatement prepareStmt(Connection conn, String sql) {
PreparedStatement pstmt = null;
try {
pstmt = conn.prepareStatement(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return pstmt;
}
public static PreparedStatement prepareStmt(Connection conn, String sql, int autoGeneratedKeys) {
PreparedStatement pstmt = null;
try {
pstmt = conn.prepareStatement(sql, autoGeneratedKeys);
} catch (SQLException e) {
e.printStackTrace();
}
return pstmt;
}
public static void close(Connection conn) {
if(conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
conn = null;
}
}
public static void close(Statement stmt) {
if(stmt != null) {
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
stmt = null;
}
}
public static void close(ResultSet rs) {
if(rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
rs = null;
}
}
}