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微信公众开放平台开发02---微信公众平台PHP接口和java接口对比

技术qq交流群：JavaDream：251572072 ----------------------------------- 这一节中的代码收集于网友的制作 ------------------------------------------- a.java-jsp版 b.PHP的接口代码: <?php /**   * wechat php test   */

//define your token

define("TOKEN", "weixin"); $wechatObj = new wechatCallbackapiTest(); $wechatObj->valid();

class wechatCallbackapiTest

{  public function valid()     {         $echoStr = $_GET["echostr"];

        //valid signature , option

        if($this->checkSignature()){          echo $echoStr;          exit;         }     }

    public function responseMsg()

    {   //get post data, May be due to the different environments   $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

       //extract post data

  if (!empty($postStr)){                                $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);                 $fromUsername = $postObj->FromUserName;                 $toUsername = $postObj->ToUserName;                 $keyword = trim($postObj->Content);                 $time = time();                 $textTpl = "<xml>        <ToUserName><![CDATA[%s]]></ToUserName>        <FromUserName><![CDATA[%s]]></FromUserName>        <CreateTime>%s</CreateTime>        <MsgType><![CDATA[%s]]></MsgType>        <Content><![CDATA[%s]]></Content>        <FuncFlag>0</FuncFlag>        </xml>";                 if(!empty( $keyword ))                 {                 $msgType = "text";                  $contentStr = "Welcome to wechat world!";                  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);                  echo $resultStr;                 }else{                  echo "Input something...";                 }

        }else {

         echo "";          exit;         }     }     private function checkSignature()  {         $signature = $_GET["signature"];         $timestamp = $_GET["timestamp"];         $nonce = $_GET["nonce"];               $token = TOKEN;   $tmpArr = array($token, $timestamp, $nonce);   sort($tmpArr);   $tmpStr = implode( $tmpArr );   $tmpStr = sha1( $tmpStr );      if( $tmpStr == $signature ){    return true;   }else{    return false;   }  } }

?>

-------------------------------------------------- c.java版接口 < import="java.util.Date"%> < import="org.dom4j.Element"%> < import="org.dom4j.DocumentHelper"%> < import="org.dom4j.Document"%> < import="java.io.IOException"%> < import="java.io.InputStreamReader"%> < import="java.io.BufferedReader"%> < import="java.io.Reader"%> < import="java.security.MessageDigest"%> < import="java.util.Arrays"%> <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%  //WeiXinHandler为内部类不能使用非final类型的对象  final String TOKEN="weixin";  final HttpServletRequest final_request=request;  final HttpServletResponse final_response=response; %> <% class WeiXinHandler{  public void valid(){   String echostr=final_request.getParameter("echostr");   if(null==echostr||echostr.isEmpty()){    responseMsg();   }else{    if(this.checkSignature()){     this.print(echostr);    }else{     this.print("error");                                                                                                                                                                                                                                                                                                                                            }   }  }  //自动回复内容  public void responseMsg(){   String postStr=null;   try{    postStr=this.readStreamParameter(final_request.getInputStream());   }catch(Exception e){    e.printStackTrace();   }   //System.out.println(postStr);   if (null!=postStr&&!postStr.isEmpty()){    Document document=null;    try{     document = DocumentHelper.parseText(postStr);    }catch(Exception e){     e.printStackTrace();    }    if(null==document){     this.print("");     return;    }    Element root=document.getRootElement();             String fromUsername = root.elementText("FromUserName");             String toUsername = root.elementText("ToUserName");             String keyword = root.elementTextTrim("Content");             String time = new Date().getTime()+"";             String textTpl = "<xml>"+       "<ToUserName><![CDATA[%1$s]]></ToUserName>"+       "<FromUserName><![CDATA[%2$s]]></FromUserName>"+       "<CreateTime>%3$s</CreateTime>"+       "<MsgType><![CDATA[%4$s]]></MsgType>"+       "<Content><![CDATA[%5$s]]></Content>"+       "<FuncFlag>0</FuncFlag>"+       "</xml>";                    if(null!=keyword&&!keyword.equals(""))             {             String msgType = "text";              String contentStr = "Welcome to wechat world!";              String resultStr = textTpl.format(textTpl, fromUsername, toUsername, time, msgType, contentStr);              this.print(resultStr);             }else{              this.print("Input something...");             }

     }else {

      this.print("");      }  }  //微信接口验证  public boolean checkSignature(){   String signature = final_request.getParameter("signature");         String timestamp = final_request.getParameter("timestamp");         String nonce = final_request.getParameter("nonce");         String token=TOKEN;         String[] tmpArr={token,timestamp,nonce};         Arrays.sort(tmpArr);         String tmpStr=this.ArrayToString(tmpArr);         tmpStr=this.SHA1Encode(tmpStr);         if(tmpStr.equalsIgnoreCase(signature)){    return true;   }else{    return false;   }  }  //向请求端发送返回数据  public void print(String content){   try{    final_response.getWriter().print(content);    final_response.getWriter().flush();    final_response.getWriter().close();   }catch(Exception e){       }  }  //数组转字符串  public String ArrayToString(String [] arr){   StringBuffer bf = new StringBuffer();   for(int i = 0; i < arr.length; i++){    bf.append(arr[i]);   }   return bf.toString();  }  //sha1加密  public String SHA1Encode(String sourceString) {   String resultString = null;   try {      resultString = new String(sourceString);      MessageDigest md = MessageDigest.getInstance("SHA-1");      resultString = byte2hexString(md.digest(resultString.getBytes()));   } catch (Exception ex) {   }   return resultString;  }  public final String byte2hexString(byte[] bytes) {   StringBuffer buf = new StringBuffer(bytes.length * 2);   for (int i = 0; i < bytes.length; i++) {    if (((int) bytes[i] & 0xff) < 0x10) {        buf.append("0");       }    buf.append(Long.toString((int) bytes[i] & 0xff, 16));   }   return buf.toString().toUpperCase();  }  //从输入流读取post参数  public String readStreamParameter(ServletInputStream in){   StringBuilder buffer = new StringBuilder();   BufferedReader reader=null;   try{    reader = new BufferedReader(new InputStreamReader(in));    String line=null;    while((line = reader.readLine())!=null){     buffer.append(line);          }   }catch(Exception e){    e.printStackTrace();   }finally{    if(null!=reader){     try {      reader.close();     } catch (IOException e) {      e.printStackTrace();     }    }   }   return buffer.toString();  } } %> <%  WeiXinHandler handler=new WeiXinHandler();  handler.valid(); %> ----------------------------------------- d.以上就是PHP接口和JSP接口的所有代码，   现在我们来对一些需要注意的地方做下分析：   首先的从总体看的话，jsp要比PHP繁琐一些，因为很多函数需要自己写，   像sha1加密，解析xml字符串等都需要自己找第三方的库。   第一点，我们要获取微信公众平台给jsp发送的post或get参数，正常情况下都是用request.getParameter就可以获取到，   但是在写的过程中发现PHP是这样获取   $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];   这时通过查询一些资料知道这样获取的是无法通过$_GET或$_POST函数得到的”未识别 MIME 类型的数据“，原始的 POST 数据   所以这里使用获取原始数据流的方式来解析post的xml数据   String postStr=null;   try{    postStr=this.readStreamParameter(final_request.getInputStream());   }catch(Exception e){    e.printStackTrace();   } ----------------------------------------------------- //从输入流读取post参数  public String readStreamParameter(ServletInputStream in){   StringBuilder buffer = new StringBuilder();   BufferedReader reader=null;   try{    reader = new BufferedReader(new InputStreamReader(in));    String line=null;    while((line = reader.readLine())!=null){     buffer.append(line);          }   }catch(Exception e){    e.printStackTrace();   }finally{    if(null!=reader){     try {      reader.close();     } catch (IOException e) {      e.printStackTrace();     }    }   }   return buffer.toString();  } -------------------------------------------------------------- 第二个，是response消息返回给微信平台，我尝试的用最一般的out.print去做，但是发现没反应，观察PHP的代码写法 echo ""; exit; ------------------ 猜想可能需要有个刷新的操作才能把消息response回去，于是找了下response内的一些函数做出以下尝试 //向请求端发送返回数据  public void print(String content){   try{    final_response.getWriter().print(content);    final_response.getWriter().flush();    final_response.getWriter().close();   }catch(Exception e){       }  } --------------------------------------- 关于微信公众平台的消息接口的详细介绍，可以参看微信公众平台的官方文档，里面介绍了消息的xml的格式和消息的发送方式等。

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