jsp页面：
<%@ 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%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<link rel="stylesheet" type="text/css" href="jquery/easyui/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="jquery/easyui/themes/icon.css">
<link rel="stylesheet" type="text/css" href="jquery/easyui/demo/demo.css">
<script type="text/javascript" src="jquery/easyui/jquery.min.js"></script>
<script type="text/javascript" src="jquery/easyui/jquery.easyui.min.js"></script>
</head>
<script type="text/javascript">
function ok(){
$("#file_tree").tree({
url:'TestTreeServlet',
lines:true,
onClick:function(node){
if(node.type=="file"){
var ps={"id":node.id};
$.post("ReadFileServlet",ps,function(data){
alert(data);
$("#info").empty().append(data);
});
}
}
});
}
</script>
<body onload="ok()">
This is my JSP page. <br>
<ul id="file_tree"></ul>
<div id="info">
</div>
</body>
</html>
后台代码：
package servlet;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ReadFileServlet extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setCharacterEncoding("utf-8");
response.setContentType("text/html");
String fileName=request.getParameter("id");
File file = new File(fileName);
<span style="white-space:pre"> </span>BufferedReader reader = null;
<span style="white-space:pre"> </span>StringBuffer text=new StringBuffer("");
<span style="white-space:pre"> </span>try {
<span style="white-space:pre"> </span>reader = new BufferedReader(new FileReader(file));
<span style="white-space:pre"> </span>int line = 1;
<span style="white-space:pre"> </span>String tempString=null;
<span style="white-space:pre"> </span>// 一次读入一行，直到读入null为文件结束
<span style="white-space:pre"> </span> <span style="white-space:pre"> </span>while ((tempString = reader.readLine()) != null) {
<span style="white-space:pre"> </span>// 显示行号
<span style="white-space:pre"> </span>System.out.println(line + ": " + tempString);
<span style="white-space:pre"> </span>text.append(tempString+"\n");
<span style="white-space:pre"> </span>line++;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>reader.close();
<span style="white-space:pre"> </span>} catch (IOException e) {
<span style="white-space:pre"> </span>e.printStackTrace();
<span style="white-space:pre"> </span>} finally {
<span style="white-space:pre"> </span>if (reader != null) {
<span style="white-space:pre"> </span> try {
<span style="white-space:pre"> </span> reader.close();
<span style="white-space:pre"> </span> } catch (IOException e1) {
<span style="white-space:pre"> </span> }
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span> <span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>response.getWriter().write(text.toString());
}
}
读取文件内容显示到页面
package servlet;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
//import com.google.gson.JsonArray;
import util.TreeJson;
public class TestTreeServlet extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html");
String id=request.getParameter("id");
if(id==null || "".equals(id)){
id="E:/test/";
}
List list=readPath(id);
JSONArray json=JSONArray.fromObject(list);
response.getWriter().write(json.toString());
}
public static List readPath(String path){
List list=new ArrayList();
File file = new File(path);
if(file.exists()){
File[] fs=file.listFiles();
if(fs!=null && fs.length>0){
for(int i=0;i<fs.length;i++){
Map map = new HashMap();
map.put("id", fs[i].getAbsolutePath());
map.put("text", fs[i].getName());
if(fs[i].isDirectory()){
map.put("type", "folder");
if(fs[i].listFiles()==null || fs[i].listFiles().length==0){
map.put("iconCls", "icon-folder");
map.put("state", "open");
}else{
map.put("state", "closed");
}
}else{
map.put("type", "file");
map.put("state", "open");
}
list.add(map);
}
}else{
Map map = new HashMap();
map.put("id", file.getAbsolutePath());
map.put("text", file.getName());
if(file.listFiles()!=null && file.listFiles().length>0){//还有子文件
map.put("state", "closed");
}else{
map.put("state", "open");
}
map.put("iconCls", file.isFile()==true?"icon-file":"icon-folder");
map.put("type", file.isFile()==true?"file":"folder");
list.add(map);
}
}
System.out.println(list.toString());
return list;
}
}
页面效果展示：
时间： 2024-08-05 01:27:39