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网站访问计数器

2013-10-14 17:13 127 查看

文章来源于：/article/3792643.html

Java代码：

package test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public class CounterBean {
private String path;//文件全路径
private String write;//要向文件写入的内容
private String read;//从文件读取的内容

public CounterBean(){}

public int readFile(){//从文件读取内容
try {
FileReader freader = new FileReader(path);
BufferedReader breader = new BufferedReader(freader);
read = breader.readLine();System.out.println("1 read="+read);
String line = breader.readLine();System.out.println("2 line="+line);
while(line!=null){
read = read+"<br>"+line;System.out.println("3 read="+read);
line = breader.readLine();System.out.println("4 line="+line);
}
breader.close();
freader.close();
return 0;
} catch (Exception e) {
return -1;
}
}

public int writeOver(){//向文件写入内容（write），原来内容将会被冲掉
try {
FileWriter fwriter = new FileWriter(path);
BufferedWriter bwrite = new BufferedWriter(fwriter);
bwrite.write(write, 0, write.length());
bwrite.flush();
bwrite.close();
return 0;
} catch (Exception e) {
return -1;
}
}

public int writeAppend(){//向文件追加写入内容（write），本次没有用到该方法
try {
FileWriter fwrite = new FileWriter(path);
BufferedWriter bwrite = new BufferedWriter(fwrite);
bwrite.newLine();
bwrite.write(write, 0, write.length());
bwrite.flush();
bwrite.close();
return 0;
} catch (Exception e) {
return -1;
}
}

public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public String getWrite() {
return write;
}
public void setWrite(String write) {
this.write = write;
}
public String getRead() {
return read;
}
public void setRead(String read) {
this.read = read;
}

}

jsp代码

html代码

<%@ page language="java" pageEncoding="gb2312"%>
<jsp:useBean id = "counterBean" class="test.CounterBean"></jsp:useBean>
<html>
<head>
<title>计数器</title>
<%!
String filePath;
%>
</head>
<body>
<center>
<%
filePath =request.getRealPath("/")+"WEB-INF\\count.txt";
counterBean.setPath(filePath);
counterBean.readFile();
int count = Integer.parseInt(counterBean.getRead())+1;
counterBean.setWrite(String.valueOf(count));
counterBean.writeOver();
out.print("总共访问人数："+count);
%>
</center>
</body>
</html>

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