和安卓是一个道理，读取json数据

PHP文件：

<?php class Test{ //日志路径 const LOG_PATH="E:\phpServer\Apache\logs\\error.log"; //显示的行数 const PAGES=50; public static function main(){ header("content-type:text/html;charset=utf-8"); if(!empty($_GET['action'])){ if(!method_exists('Test',$_GET['action'])){ echo "404"; }else{ self::$_GET['action'](); } exit; } } public static function showApacheLogs(){ $test=new Test(); $result=$test->readLogs(self::LOG_PATH,self::PAGES); $json=array(); for($i=0;$i<count($result);$i++){ $line=$result[$i]; //注意这里，如果处理会json解析失败 $line=str_replace("\r\n", "", $line); $result[$i]=array("num"=>$i+1,"msg"=>urlencode($line)); } $str=stripslashes(urldecode(json_encode($result))); echo $str; } /** * 读取日志 */ private function readLogs($filePath,$num=20){ $fp = fopen($filePath,"r"); $pos = -2; $eof = ""; $head = false; //当总行数小于Num时，判断是否到第一行了 $lines = array(); while($num>0){ while($eof != "\n"){ if(fseek($fp, $pos, SEEK_END)==0){ //fseek成功返回0，失败返回-1 $eof = fgetc($fp); $pos--; }else{ //当到达第一行，行首时，设置$pos失败 fseek($fp,0,SEEK_SET); $head = true; //到达文件头部，开关打开 break; } } array_unshift($lines,fgets($fp)); if($head){ break; } //这一句，只能放上一句后，因为到文件头后，把第一行读取出来再跳出整个循环 $eof = ""; $num--; } fclose($fp); return array_reverse($lines); } } Test::main();

java文件：

import java.io.InputStream; import .HttpURLConnection; import .URL; import org.json.JSONArray; import org.json.JSONObject; public class ReadLogs { public static void main(String[] args) throws Exception { URL url = new URL("http://localhost/test.php?action=showApacheLogs"); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setConnectTimeout(10000); conn.setRequestMethod("GET"); conn.setDoInput(true); conn.setDoOutput(true); // 输出返回结果 InputStream input = conn.getInputStream(); int resLen =0; byte[] res = new byte[1024]; StringBuilder sb=new StringBuilder(); while((resLen=input.read(res))!=-1){ sb.append(new String(res, 0, resLen)); } String jsonStr=sb.toString(); //String转换成JSON JSONArray jsonArray=new JSONArray(jsonStr); for(int i=0;i<jsonArray.length();i++){ JSONObject jsonObject=new JSONObject(jsonArray.getString(i)); String msg=(String) jsonObject.get("msg"); int num=(int) jsonObject.get("num"); System.out.println(num+":"+msg); } } }