Question

我想在servlet中弹出一个窗口，如何写？

要那种小窗口

Answer 1

看这段这是调用javabean的<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<jsp:useBean id="Purview" scope="page" class="com.teach.Main.PurviewBean" />
<%String userloginname = session.getAttribute("UserLoginName")
.toString();
String usertype = session.getAttribute("UserType").toString();
Collection plist = Purview.getPurviewList(userloginname, usertype);
if (plist == null) {
plist = new ArrayList();
}
pageContext.setAttribute("purviewlist", plist);
%>

这是拿个bean
package com.teach.Main;
import com.teach.db.ContextWy;
import com.teach.db.DBCPool;
import java.util.Collection;
import java.util.ArrayList;
import java.sql.*;

//得到左侧权限列表框
public class PurviewBean {
private String strDbip;
private String strType;
private String strUserid;
private Collection purviewlist;
private String strSQL;
private String strTemplate;
private String strQx;
public PurviewBean(){
strDbip=ContextWy.DEFAULT_DBIP;
strType="4";
strUserid="";
purviewlist=new ArrayList();
strSQL="";
strTemplate="";
strQx="";
}
public Collection getPurviewList(String userid,String usertype){
if(userid!=null&&(!userid.equals(""))){
strUserid=userid;
}
if(usertype!=null&&(!usertype.equals(""))){
strType=usertype;
}

DBCPool dbc= new DBCPool();
Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
try{
if(strType.equals("2")){
conn=dbc.getConnection("YuanDa",strDbip);
}else{
conn=dbc.getConnection("YuanDa",strDbip);
}
}catch(Exception e){
System.out.println("Conn Err :"+e.getMessage());
}
if(strType.equals("1")){
strSQL="select user_templateId as qx from users where user_name='"+strUserid+"'";
}else if(strType.equals("2")){
strSQL="select templateId as qx from student where name='"+strUserid+"'";
}
if(conn!=null){
try{
stmt=conn.createStatement (ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);
}catch(Exception e1){
System.out.println("Stmt Err : "+e1.getMessage());
}
}
try{
//stmt=conn.createStatement (ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);
rs=stmt.executeQuery(strSQL);
if(rs.next()){
strTemplate=rs.getString("qx");
}
rs.close();
if(!strTemplate.equals(""))
{
strSQL="select * from permission_templet where templet_id='"+strTemplate+"'";
}
rs=stmt.executeQuery(strSQL);
if(rs.next())
{
strQx=rs.getString("templet_permission");
}
if(!strQx.equals("")){
String[] strArr=strQx.split(",");
for(int i=0;i<strArr.length;i++){
Purview purview=new Purview();
strSQL="select * from Permission where permission_id='"+strArr[i]+"'";
rs=stmt.executeQuery(strSQL);
if(rs.next()){
purview.setQxid(Integer.toString(rs.getInt("permission_id")));
purview.setQxmc(rs.getString("permission_name"));
purview.setQxurl(rs.getString("permission_url"));
purview.setQxtarget(rs.getString("permission_target"));
purview.setQxfid(Integer.toString(rs.getInt("permission_parentId")));
String qxsign=rs.getString("permission_sign");
qxsign=qxsign.trim();
purview.setQxsign(qxsign);
}
rs.close();
purviewlist.add(purview);
}
}
stmt.close();
conn.close();
}catch(Exception er){
System.out.println("RS Err2 : "+er.getMessage());
}
return purviewlist;
}
}
注意路径，这就是javabean的用法