如何在 jsp中写一个类,接受一个参数 ,调用后再返回一个值呀 写个javaBean就行了,然后在jsp中调用! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 为什么要放到jsp里面,随便些个什么类在jsp里面引用就好了 是想写个类放在jsp里,但不知这个类怎么写呀以及怎么引用 呀能给你程序结构吗 package com.css;import java.io.*;import java.sql.*;import java.lang.*;public class Login{ String name,pwd,outstr; int retcode; static Connection conn; public Login(){ conn=null; outstr=null; retcode=-99; } public void setLogin(String as_name,String as_pwd){ if ((as_name==null || as_name.length()==0) && (as_pwd==null || as_pwd.length()==0)){ retcode=-99; return; } if (as_name==null || as_name.length()==0){ retcode=-1; return; } if (as_pwd==null || as_pwd.length()==0){ retcode=-2; return; } } public String getoutstr(){ switch(retcode){ case -1:outstr="name can not null"; return outstr; case -2:outstr="password can not null"; return outstr; case 0:outstr="database connect failed"; return outstr; case 1:outstr="connect successed"; return outstr; case -99:outstr=""; return outstr; default:outstr="-2000"; return outstr; } } }然后在jsp中调用:<%@ page import="com.css.Login"%>...<%Login MM_login=new Login();%>....<% String ls_name,ls_pwd,ls_outstr; ls_name=request.getParameter("name"); ls_pwd=request.getParameter("pwd"); MM_login.setLogin(ls_name,ls_pwd); ls_outstr=MM_login.getoutstr(); out.println(ls_outstr);%> javabean干什么的啊?就是这个!!! 帮配一个ibatis的小例子,谢谢了 java类 向页面传值的问题 怎样用js完成图片的旋转加剪裁,并且有实时预览效果 Ext 怎么把store中的数据显示到grid中??? jsp+tomcat+sql server2000 无法插入中文,在线急等!!! 数据库问题! struts开发中遇到使用脚本问题 jsp+javabean连接access出错,跪求大侠帮忙。 大家好,一个小问题如何使button按钮失效,防止双击情况 关于JSP的分行问题?急!高分 请大家进来一下,关于JSP的问题,有没有好的程序方法~~~~~很急的~~~~在线等~~ JSP与ASP比较
以及怎么引用 呀能给你程序结构吗
import java.sql.*;
import java.lang.*;public class Login{
String name,pwd,outstr;
int retcode;
static Connection conn;
public Login(){
conn=null;
outstr=null;
retcode=-99;
} public void setLogin(String as_name,String as_pwd){
if ((as_name==null || as_name.length()==0) && (as_pwd==null || as_pwd.length()==0)){
retcode=-99;
return;
}
if (as_name==null || as_name.length()==0){
retcode=-1;
return;
}
if (as_pwd==null || as_pwd.length()==0){
retcode=-2;
return;
}
} public String getoutstr(){
switch(retcode){
case -1:outstr="name can not null";
return outstr;
case -2:outstr="password can not null";
return outstr;
case 0:outstr="database connect failed";
return outstr;
case 1:outstr="connect successed";
return outstr;
case -99:outstr="";
return outstr;
default:outstr="-2000";
return outstr;
}
} }然后在jsp中调用:
<%@ page import="com.css.Login"%>
...
<%Login MM_login=new Login();%>
....
<%
String ls_name,ls_pwd,ls_outstr;
ls_name=request.getParameter("name");
ls_pwd=request.getParameter("pwd");
MM_login.setLogin(ls_name,ls_pwd);
ls_outstr=MM_login.getoutstr();
out.println(ls_outstr);
%>