我写了个JSP的登录页面，老是提交不过去，大家帮忙看看了谢谢
登录页面就不写了logOn.jsp提交给LoginServlet.java
LoginServlet.java代码：
package com.gsi.role.servlet;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.gsi.role.db.ConnectionPool;
import com.gsi.role.db.DB;
/**
* Servlet implementation class for Servlet: LoginServlet
*/
public class LoginServlet extends javax.servlet.http.HttpServlet implements
javax.servlet.Servlet {
/*
* (non-Java-doc)
*
* @see javax.servlet.http.HttpServlet#HttpServlet()
*/
public LoginServlet() {
super();
}
/*
* (non-Java-doc)
*
* @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request,
* HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/*
* (non-Java-doc)
*
* @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request,
* HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType( "text/html ");
String result = " ";
// 获取提交的用户名：
String strUserName = request.getParameter( "C_Usr_Id ");
// 获取提交的密码：
String strPassword = request.getParameter( "C_Usr_Passwd ");
if ((strUserName == null) || (strUserName.equals( " "))
|| (strUserName.length() > 20)) {
result = "请输入用户名(不超过20字符) ";
request.setAttribute( "error_username ", result);
response.sendRedirect( "logOn.jsp ");
}
if ((strPassword == null) || (strPassword.equals( " "))
|| (strPassword.length() > 20)) {
result = "请输入密码(不超过20字符) ";
request.setAttribute( "error_password ", result);
response.sendRedirect( "logOn.jsp ");
}
// 创建数据库连接对象：
ConnectionPool connPool = DB.getConnPool();
Connection conn = connPool.getConnection();
Statement stmt = null;
ResultSet rs = null;
String sql= " ";
try {
// sql语句：
sql = "select * from sys_usr where C_Usr_Id= ' "+ strUserName + " ' and C_Usr_Passwd= ' " + strPassword + " ' ";
// 创建数据记录集对象：
stmt = conn.createStatement();
// 执行sql语句，返回一个记录集到rs：
rs = stmt.executeQuery(sql);
// 如果记录集为非空，表明有相匹配的用户名和密码，登录成功：
if (rs.next()) {
// 登录成功时,把strUserName设成session变量UserName
request.getSession(true).setAttribute( "userName ", strUserName);
response.sendRedirect( "index.htm ");
} else {
// 否则（记录集为空），表明失败：
response.sendRedirect( "err.jsp ");
}
} catch (SQLException sqlExc) {
sqlExc.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
// 关闭连接，释放数据库资源：
try {
if (rs != null) {
rs.close();
}
if (stmt != null) {
stmt.close();
}
connPool.freeConnection(conn);
} catch (SQLException sqlExc) {
sqlExc.printStackTrace();
}
}
}
}
[解决办法]
在doGet方法里面加一句
{
doPost(HttpServletRequest request,
HttpServletResponse response);
}
[解决办法]
同楼上,你在 doget里加上dopost
