先来一个分层架构图：
WeebRoot目录下的页面：
现在，此项目以实现登录，注销，新闻列表，编辑主题》》》》
先来登录部分的关键代码
index.jsp中的代码
userInfoServlet中的全部代码：
TopicServlet中的代码
package cn.news.Servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.news.dao.impl.TopicDAOImpl;
import cn.news.entity.Topic;
import cn.news.service.ITopicService;
import cn.news.service.impl.TopicServiceImpl;
public class TopicServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//调度Topic的service
ITopicService service=new TopicServiceImpl();
try {
List<Topic> list=service.getAllTopic();
request.setAttribute("topiclist", list);
//System.out.println(list.size());
//转发到列表页
request.getRequestDispatcher("/newspages/topic_list.jsp").forward(request, response);
} catch (SQLException e) {
}
}
}
topic_list中的代码
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> </head> <body> <%=path %> <form enctype="multipart/form-data" action="<%=path %>/test.jsp" method="post"> 姓 名： <input name="username"/> 选择文件：<input type="file" name="myfile" /> <input type="submit" value="上传"/> </form> </body></html> |
<%@page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="java.io.File"%>
<%@page import="org.apache.commons.fileupload.FileItem"%>
<%@page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>
<%@page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%
request.setCharacterEncoding("UTF-8");
//将用户传递过来的request中的内容解析出来，判定其类型，如果是常规的普通表单字段，执行处理方式一
//否则就代表的是文件域，那么执行处理方式二
//01.判定是普通表单，还是用来上传文件的表单
boolean flag= ServletFileUpload.isMultipartContent(request);
if(flag){
//开始找到一个解析器，来解析请求中的各个项目
DiskFileItemFactory factory=new DiskFileItemFactory();
ServletFileUpload upload=new ServletFileUpload(factory);//解析器upload创建成功
List<FileItem> fileList=upload.parseRequest(request);
//每一个FileItem都代表一个表单元素
Iterator<FileItem> myitor=fileList.iterator();
while(myitor.hasNext()){
FileItem item=myitor.next();
if(item!=null){
//对当前item进行验证，看它是普通表单还是上传用的文件域
if(item.isFormField()){//证明是普通的表单字段
//获取该表单元素的内容(value值)
String name=item.getFieldName();//这是表单元素的name属性，而不是value值
if(name.equals("username")){
out.print(item.getString("UTF-8"));
}
}else{ //是一个文件域
String fileName=item.getName();//ef.doc
//扔到服务器的目录下
String path="/WEB-INF/upload";//文件上传不能用相对路径
//将相对路径转换成绝对路径
String abosolutePath=this.getServletContext().getRealPath(path);
File file=new File(fileName);
File uploadFile=new File(abosolutePath,file.getName());
item.write(uploadFile);
out.print("上传成功");
}
}
}
}
%>