MyEclipse------在特定目录创建文件和书写内容

readwrite.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>
<%@page import="java.io.*,java.lang.*"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'readwrite.jsp' starting page</title>
</head>

<body>
    <!-- 因为path系统已经定义过了，所以不需要加String -->
    <%
        //这里应该包含test.txt所在的路径，因为FileWriter和FileReader里面的参数不能带路径
        path=request.getRealPath("")+"\\file";
        
        FileWriter fw=new FileWriter(path+"\\test.txt");
        fw.write("您好，世界"+"<br>");
        fw.write("我来了");
        fw.close();
        
        FileReader fr=new FileReader(path+"\\test.txt");
        int c=fr.read();
        while(c!=-1){
            out.print((char)c);
            c=fr.read();
            if(c==13){
                out.print("<br>");
                fr.skip(1);
                fr.read();
            }
        }
        fr.close();
     %>
</body>
</html>

 

快速在特定目录下创建文件的方法：

        path=request.getRealPath("");
        File file=new File(path,"sdf.txt");
        if(file.exists()){
            out.print("该文件已经存在");
        }
        else{
            file.createNewFile();
            out.print("该文件创建成功");
        }

 

运行可执行文件：Runtime(好像只能执行exe，txt就不行了)

        File file=new File("D:\\酷狗\\KuGou2012\\","KuGou.exe");
        
        try{
            Runtime ce=Runtime.getRuntime();
            ce.exec(file.getPath());
            out.print("执行文件成功");
        }
        catch(Exception e){
            out.print(e);
        }

 

posted @ 2016-03-27 12:03  玉天恒  阅读(303)  评论(0)  编辑  收藏  举报