id name
1 a
2 b
以上是数据库ssc中的表student(mysql)
以下是代码/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/import java.io.IOException;
import java.lang.String;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
@WebServlet(urlPatterns = {"/SSCServer"})
public class SSCServer extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Configuration cfg = new Configuration().configure();
SessionFactory sf = cfg.buildSessionFactory();
Session session = sf.openSession();
Transaction ts = session.beginTransaction();
String href = "/SSC2/Complete.jsp";
Connection conn;
Statement stmt;
ResultSet rst;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
String url = "jdbc:mysql://localhost:3306/ssc";
String user = "root";
String passWord = "111111";
conn = DriverManager.getConnection(url, user, passWord);
// List list = session.createQuery("select name from student where id=2").list();
stmt = conn.createStatement();
rst = stmt.executeQuery("select name from student where id=2");
String name1 = rst.getString(1);//***************
response.sendRedirect(href);
} catch (Exception e) {
e.getMessage();
}
ts.commit();
session.close();
sf.close(); }}********处(String name1=rst.getString(1))执行不了 求解释 先谢谢各位了!数据库MySQL
1 a
2 b
以上是数据库ssc中的表student(mysql)
以下是代码/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/import java.io.IOException;
import java.lang.String;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
@WebServlet(urlPatterns = {"/SSCServer"})
public class SSCServer extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Configuration cfg = new Configuration().configure();
SessionFactory sf = cfg.buildSessionFactory();
Session session = sf.openSession();
Transaction ts = session.beginTransaction();
String href = "/SSC2/Complete.jsp";
Connection conn;
Statement stmt;
ResultSet rst;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
String url = "jdbc:mysql://localhost:3306/ssc";
String user = "root";
String passWord = "111111";
conn = DriverManager.getConnection(url, user, passWord);
// List list = session.createQuery("select name from student where id=2").list();
stmt = conn.createStatement();
rst = stmt.executeQuery("select name from student where id=2");
String name1 = rst.getString(1);//***************
response.sendRedirect(href);
} catch (Exception e) {
e.getMessage();
}
ts.commit();
session.close();
sf.close(); }}********处(String name1=rst.getString(1))执行不了 求解释 先谢谢各位了!数据库MySQL
{
String name1 = rst.getString(1);
}
关键不是while循环,而是rst.next();
rst.next();
String name1 = rst.getString(1);
也可以的。
{
String name1 = rst.getString(1);
}