java读取PHP接口数据的实现方法（四）

PHP文件：

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<?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：

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import java.io.InputStream; import java.net.HttpURLConnection; import java.net.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);     }   } }

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