Java微信公衆平臺開發_07_JSSDK圖片上傳

1、本節要點

1.獲取jsapi_ticket

    //2.獲取getJsapiTicket的接口地址,有效期爲7200秒 
    private static final String GET_JSAPITICKET_URL="https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi"; 


/**
     * @desc ：2.獲取JsapiTicket
     *  
     * @param accessToken  有效憑證
     * @return
     * @throws Exception String
     */
    public static String getJsapiTicket(String accessToken) throws Exception {
        //1.獲取請求url
        String url=GET_JSAPITICKET_URL.replace("ACCESS_TOKEN", accessToken);

        //2.發起GET請求，獲取返回結果
        JSONObject jsonObject=HttpHelper.doGet(url);
        logger.info("jsonObject:"+jsonObject.toJSONString());

        //3.解析結果，獲取accessToken
        String jsapiTicket="";  
        if (null != jsonObject) {  
            //4.錯誤消息處理
            if (jsonObject.getInteger("errcode")!=null && 0 != jsonObject.getInteger("errcode")) {  
                int errCode = jsonObject.getInteger("errcode");
                String errMsg = jsonObject.getString("errmsg");
                throw new Exception("error code:"+errCode+", error message:"+errMsg); 
                //5.成功獲取jsapiTicket
            }else {
                jsapiTicket=jsonObject.getString("ticket");
            }  
        }  


        return jsapiTicket;
    }

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2.JS-SDK 使用權限簽名算法

    /**
     * @desc ：4.獲取前端jsapi須要的配置參數
     *  
     * @param request
     * @return String
     */
    public static String getJsapiConfig(HttpServletRequest request){  

        //1.準備好參與簽名的字段
        //1.1 url
        /* 
         *以http://localhost/test.do?a=b&c=d爲例 
         *request.getRequestURL的結果是http://localhost/test.do 
         *request.getQueryString的返回值是a=b&c=d 
         */  
        String urlString = request.getRequestURL().toString();
        String queryString = request.getQueryString();
        String queryStringEncode = null;
        String url;
        if (queryString != null) {
            queryStringEncode = URLDecoder.decode(queryString);
            url = urlString + "?" + queryStringEncode;
        } else {
            url = urlString;
        }

        //1.2 noncestr
        String nonceStr=UUID.randomUUID().toString();      //隨機數
        //1.3 timestamp
        long timeStamp = System.currentTimeMillis() / 1000;     //時間戳參數  

        String signedUrl = url;

        String accessToken = null;
        String ticket = null;

        String signature = null;       //簽名


        try {  
            //1.4 jsapi_ticket
            accessToken=getAccessToken(Env.APP_ID, Env.APP_SECRET);  
            ticket=getJsapiTicket(accessToken);  

            //2.進行簽名，獲取signature
            signature=getSign(ticket,nonceStr,timeStamp,signedUrl);  


        } catch (Exception e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  

        logger.info("accessToken:"+accessToken);
        logger.info("ticket:"+ticket);
        logger.info("nonceStr:"+nonceStr);
        logger.info("timeStamp:"+timeStamp);
        logger.info("signedUrl:"+signedUrl);
        logger.info("signature:"+signature);
        logger.info("appId:"+Env.APP_ID);




        String configValue = "{signature:'" + signature + "',nonceStr:'" + nonceStr + "',timeStamp:'"
                + timeStamp + "',appId:'" + Env.APP_ID + "'}";
        logger.info("configValue:"+configValue);

        return configValue;  
    }  


    /**
     * @desc ： 4.1 生成簽名的函數 
     *  
     * @param ticket jsticket
     * @param nonceStr 隨機串，本身定義
     * @param timeStamp 生成簽名用的時間戳 
     * @param url 須要進行免登鑑權的頁面地址，也就是執行dd.config的頁面地址 
     * @return
     * @throws Exception String
     */

    public static String getSign(String jsTicket, String nonceStr, Long timeStamp, String url) throws Exception {  
        String plainTex = "jsapi_ticket=" + jsTicket + "&noncestr=" + nonceStr + "&timestamp=" + timeStamp + "&url=" + url;
        System.out.println(plainTex);
        try {  
            MessageDigest crypt = MessageDigest.getInstance("SHA-1");
            crypt.reset();
            crypt.update(plainTex.getBytes("UTF-8"));
            return byteToHex(crypt.digest());
        } catch (NoSuchAlgorithmException e) {  
            throw new Exception(e.getMessage());  
        } catch (UnsupportedEncodingException e) {  
            throw new Exception(e.getMessage());  
        }  
    }  

    /**
     * @desc ：4.2 將bytes類型的數據轉化爲16進制類型  
     *  
     * @param hash
     * @return 
     *   String
     */
    private static String byteToHex(byte[] hash) {
        Formatter formatter = new Formatter();
        for (byte b : hash) {
            formatter.format("%02x", new Object[] { Byte.valueOf(b) });
        }
        String result = formatter.toString();
        formatter.close();
        return result;
    }

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2.1 簽名生成規則

（1）參與簽名的字段包括：

          noncestr（隨機字符串）,

         有效的jsapi_ticket,

          timestamp（時間戳）,

          url（當前網頁的URL，不包含#及其後面部分） 。

（2）對全部待簽名參數按照字段名的ASCII 碼從小到大排序（字典序）後，使用URL鍵值對的格式 （即 key1=value1&key2=value2…）拼接成字符串string1。這裏須要注意的是全部參數名均爲小寫字符。對string1做sha1加密，字段名和字段值都採用原始值，不進行URL 轉義。

（3）對string1進行sha1簽名，獲得signature：

 

2.2 簽名算法應用實例

（1）待簽名參數：

      noncestr=Wm3WZYTPz0wzccnW

      jsapi_ticket=sM4AOVdWfPE4DxkXGEs8VMCPGGVi4C3VM0P37wVUCFvkVAy_90u5h9nbSlYy3-Sl-HhTdfl2fzFy1AOcHKP7qg

      timestamp=1414587457

      url=http://mp.weixin.qq.com

（2）字典序

string1=jsapi_ticket=sM4AOVdWfPE4DxkXGEs8VMCPGGVi4C3VM0P37wVUCFvkVAy_90u5h9nbSlYy3-Sl-HhTdfl2fzFy1AOcHKP7qg&noncestr=Wm3WZYTPz0wzccnW&timestamp=1414587457&url=http://mp.weixin.qq.com

（3）sha1加密

signature=sha1(string1)

 

3.JS-SDK使用步驟

（1）綁定域名

測試號：

 

（2）引入JS文件

在須要調用JS接口的頁面引入以下JS文件，（支持https）：http://res.wx.qq.com/open/js/jweixin-1.2.0.js

<script type="text/javascript"  src="http://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script>

 

（3）經過config接口注入權限驗證配置

//1.jsapi簽名校驗
wx.config({
    beta: true,// 必須這麼寫，不然在微信插件有些jsapi會有問題
    debug: true, // 開啓調試模式,調用的全部api的返回值會在客戶端alert出來，若要查看傳入的參數，能夠在pc端打開，參數信息會經過log打出，僅在pc端時纔會打印。
    appId: _config.appId, // 必填，公衆號的惟一標識
    timestamp: _config.timeStamp, // 必填，生成簽名的時間戳
    nonceStr: _config.nonceStr, // 必填，生成簽名的隨機串
    signature: _config.signature,// 必填，簽名，見附錄1
    jsApiList: [ 'checkJsApi', 'onMenuShareAppMessage',
        'onMenuShareWechat', 'startRecord', 'stopRecord',
        'onVoiceRecordEnd', 'playVoice', 'pauseVoice', 'stopVoice',
        'uploadVoice', 'downloadVoice', 'chooseImage',
        'previewImage', 'uploadImage', 'downloadImage',
        'getNetworkType', 'openLocation', 'getLocation',
        'hideOptionMenu', 'showOptionMenu', 'hideMenuItems',
        'showMenuItems', 'hideAllNonBaseMenuItem',
        'showAllNonBaseMenuItem', 'closeWindow', 'scanQRCode',
        'previewFile', 'openEnterpriseChat',
        'selectEnterpriseContact','chooseInvoice'

        ]// 必填，須要使用的JS接口列表，全部JS接口列表見附錄2
});

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（4）經過ready接口處理成功驗證

 

（5） 經過error接口處理失敗驗證

//2.jsapi簽名校驗失敗後執行error
wx.error(function(err){
    alert('wx error: ' + JSON.stringify(err));  
    // config信息驗證失敗會執行error函數，如簽名過時致使驗證失敗，具體錯誤信息能夠打開config的debug模式查看，也能夠在返回的res參數中查看，對於SPA能夠在這裏更新簽名。
});

 

4.圖片上傳

4.1 圖片上傳的流程

（1）使用 jssdk 上傳圖片到微信服務器，返回圖片對應的mediaId( 即 serverId)

    //2.2 上傳圖片
    var images = {
            localId : [],
            serverId : []
    };
    $("#uploadImg").click(function(){
        //2.2.1拍照或從手機相冊中選圖
        wx.chooseImage({
            success : function(res) {
                images.localId = res.localIds;
                alert('已選擇 ' + res.localIds.length + ' 張圖片');
                //2.2.2 上傳圖片
                uploadImg();
            }
        });
    });

    // 2.2.2 上傳圖片
    function uploadImg() {
        if (images.localId.length == 0) {
            alert('請先使用 chooseImage 接口選擇圖片');
            return;
        }
        var i = 0, length = images.localId.length;
        images.serverId = [];

        function upload() {
            wx.uploadImage({
                localId : images.localId[i],
                success : function(res) {
                    i++;
                    alert('已上傳：' + i + '/' + length);
                    images.serverId.push(res.serverId);
                    //將serverId上傳至服務器
                    alert("ajax請求即將執行--");

                    $.ajax({
                        type : "POST",
                        url : "http://se9mxs.natappfree.cc/weixin_gz/uploadimg",
                        data : {
                            serverId : res.serverId
                        },
                        dataType : "text",
                        success : function(data) {
                            alert(data);
                        }

                    });


                    if (i < length) {
                        upload();
                    }
                },
                fail : function(res) {
                    alert(JSON.stringify(res));
                }
            });
        }
        upload();
    };

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（2）使用素材管理接口，根據 mediaId 從微信服務器將圖片下載至服務器本地。參見：Java微信公衆平臺開發_06_素材管理

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String mediaId=request.getParameter("serverId");
        System.out.println("serverId:"+mediaId);

        try {
            String accessToken=AuthHelper.getAccessToken(Env.APP_ID, Env.APP_SECRET);
            
            //String savePath=System.getProperty("user.dir").replaceAll("\\\\", "/")+"/WebContent/img/"+mediaId+".png"; 
            String fileDir=request.getSession().getServletContext().getRealPath("").replaceAll("\\\\", "/")+"/img/"; 
            System.out.println("fileDir:"+fileDir);

            //2.調用業務類，獲取臨時素材
            TempMaterialService.getTempMaterial(accessToken, mediaId, fileDir);

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        PrintWriter out = response.getWriter(); 
        out.print("HHHHHHHHHH");  
        out.close();  
        out = null;  
        
        
    }

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2、代碼實現

1.前端頁面—uploadImg.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSSDK之上傳圖片</title>
<script src="js/jquery-3.2.1.min.js"></script>
<script type="text/javascript"
    src="http://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script>

<script type="text/javascript">
    var _config =
<%=com.ray.weixin.gz.util.AuthHelper.getJsapiConfig(request)%>
    ;
</script>

<script type="text/javascript" src="js/auth.js"></script>


</head>
<body>


    <div align="center">
        <img id="userImg" alt="頭像" src="">
    </div>

    <div align="center">
        <span>UserName:</span>
        <div id="userName" style="display: inline-block"></div>
    </div>

    <div align="center">
        <span>UserId:</span>
        <div id="userId" style="display: inline-block"></div>
    </div>


    <div align="center">
        <span class="desc">是否驗證成功</span>
        <button class="btn btn_primary" id="yanzheng">驗證</button>
    </div>
    
    <div align="center">
        <span class="desc">測試按鈕</span>
        <button class="btn btn_primary" id="ceshi">測試</button>
    </div>

    <div align="center">
        <span class="desc">上傳圖片按鈕</span>
        <button class="btn btn_primary" id="uploadImg">上傳圖片</button>
    </div>

    <div align="center">
        <span class="desc">拍照上傳圖片按鈕</span>
        <button class="btn btn_primary" id="uploadImgFromCamera">拍照上傳</button>
    </div>
    
    
    <div align="center">
        <span class="desc">掃碼按鈕</span>
        <button class="btn btn_primary" id="qrcode" >掃碼</button>
    </div>
</body>
</html>

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auth.js

//1.jsapi簽名校驗
wx.config({
    beta: true,// 必須這麼寫，不然在微信插件有些jsapi會有問題
    debug: true, // 開啓調試模式,調用的全部api的返回值會在客戶端alert出來，若要查看傳入的參數，能夠在pc端打開，參數信息會經過log打出，僅在pc端時纔會打印。
    appId: _config.appId, // 必填，公衆號的惟一標識
    timestamp: _config.timeStamp, // 必填，生成簽名的時間戳
    nonceStr: _config.nonceStr, // 必填，生成簽名的隨機串
    signature: _config.signature,// 必填，簽名，見附錄1
    jsApiList: [ 'checkJsApi', 'onMenuShareAppMessage',
        'onMenuShareWechat', 'startRecord', 'stopRecord',
        'onVoiceRecordEnd', 'playVoice', 'pauseVoice', 'stopVoice',
        'uploadVoice', 'downloadVoice', 'chooseImage',
        'previewImage', 'uploadImage', 'downloadImage',
        'getNetworkType', 'openLocation', 'getLocation',
        'hideOptionMenu', 'showOptionMenu', 'hideMenuItems',
        'showMenuItems', 'hideAllNonBaseMenuItem',
        'showAllNonBaseMenuItem', 'closeWindow', 'scanQRCode',
        'previewFile', 'openEnterpriseChat',
        'selectEnterpriseContact','chooseInvoice'

        ]// 必填，須要使用的JS接口列表，全部JS接口列表見附錄2
});

//2.jsapi簽名校驗成功後執行ready
wx.ready(function(){
    // config信息驗證後會執行ready方法，全部接口調用都必須在config接口得到結果以後，config是一個客戶端的異步操做，因此若是須要在頁面加載時就調用相關接口，則須把相關接口放在ready函數中調用來確保正確執行。對於用戶觸發時才調用的接口，則能夠直接調用，不須要放在ready函數中。

    //2.1 提示jsapi簽名驗證成功
    $("#yanzheng").html("驗證成功");  

    $("#ceshi").click(function(){
        alert("ceshiaaa");

    });

    $("#checkJsApi").click(function(){
        wx.checkJsApi({
            jsApiList: [ 'checkJsApi', 'onMenuShareAppMessage',
                'onMenuShareWechat', 'startRecord', 'stopRecord',
                'onVoiceRecordEnd', 'playVoice', 'pauseVoice', 'stopVoice',
                'uploadVoice', 'downloadVoice', 'chooseImage',
                'previewImage', 'uploadImage', 'downloadImage',
                'getNetworkType', 'openLocation', 'getLocation',
                'hideOptionMenu', 'showOptionMenu', 'hideMenuItems',
                'showMenuItems', 'hideAllNonBaseMenuItem',
                'showAllNonBaseMenuItem', 'closeWindow', 'scanQRCode',
                'previewFile', 'openEnterpriseChat',
                'selectEnterpriseContact','chooseInvoice'

                ], // 須要檢測的JS接口列表，全部JS接口列表見附錄2,
                success: function(res) {
                    // 以鍵值對的形式返回，可用的api值true，不可用爲false
                    // 如：{"checkResult":{"chooseImage":true},"errMsg":"checkJsApi:ok"}
                }
        });

    });



    //2.2 上傳圖片
    var images = {
            localId : [],
            serverId : []
    };
    $("#uploadImg").click(function(){
        //2.2.1拍照或從手機相冊中選圖
        wx.chooseImage({
            success : function(res) {
                images.localId = res.localIds;
                alert('已選擇 ' + res.localIds.length + ' 張圖片');
                //2.2.2 上傳圖片
                uploadImg();
            }
        });
    });

    // 2.2.2 上傳圖片
    function uploadImg() {
        if (images.localId.length == 0) {
            alert('請先使用 chooseImage 接口選擇圖片');
            return;
        }
        var i = 0, length = images.localId.length;
        images.serverId = [];

        function upload() {
            wx.uploadImage({
                localId : images.localId[i],
                success : function(res) {
                    i++;
                    alert('已上傳：' + i + '/' + length);
                    images.serverId.push(res.serverId);
                    //將serverId上傳至服務器
                    alert("ajax請求即將執行--");

                    $.ajax({
                        type : "POST",
                        url : "http://se9mxs.natappfree.cc/weixin_gz/uploadimg",
                        data : {
                            serverId : res.serverId
                        },
                        dataType : "text",
                        success : function(data) {
                            alert(data);
                        }

                    });


                    if (i < length) {
                        upload();
                    }
                },
                fail : function(res) {
                    alert(JSON.stringify(res));
                }
            });
        }
        upload();
    };

    //2.3 掃一掃
    $("#qrcode").click(function(){
        wx.scanQRCode({
            needResult: 1, // 默認爲0，掃描結果由微信處理，1則直接返回掃描結果，
            scanType: ["qrCode","barCode"], // 能夠指定掃二維碼仍是一維碼，默認兩者都有
            success: function (res) {
                var result = res.resultStr; // 當needResult 爲 1 時，掃碼返回的結果
                alert(result);

            },
            fail:function (res) {
                var result = res.resultStr; // 當needResult 爲 1 時，掃碼返回的結果
                alert(result);

            }
        });

    });

    //2.4 拉起發票列表
    //注意，調用此接口時，config接口必須傳入beta參數。
    $("#showInvoice").click(function(){
        alert("timestamp:"+invoice_config.timestamp);
        alert("nonceStr:"+invoice_config.nonceStr);
        alert("signType:"+invoice_config.signType);
        alert("cardSign:"+invoice_config.cardSign);

        wx.invoke('chooseInvoice', {
            'timestamp': invoice_config.timestamp, // 卡券簽名時間戳 
            'nonceStr' : invoice_config.nonceStr, // 卡券簽名隨機串 
            'signType' : invoice_config.signType, // 簽名方式，默認'SHA1' 
            'cardSign' : invoice_config.cardSign, // 卡券簽名 
        }, function(res) {
            // 這裏是回調函數 
            alert("aaaaaa");
            alert(JSON.stringify(res)); // 返回的結果 
        });

    });




});


//2.jsapi簽名校驗失敗後執行error
wx.error(function(err){
    alert('wx error: ' + JSON.stringify(err));  
    // config信息驗證失敗會執行error函數，如簽名過時致使驗證失敗，具體錯誤信息能夠打開config的debug模式查看，也能夠在返回的res參數中查看，對於SPA能夠在這裏更新簽名。
});

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2.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>weixin_gz</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <!--微信公衆號回調-->
    <servlet>
        <servlet-name>weixin</servlet-name>
        <servlet-class>com.ray.weixin.gz.controller.WeiXinServlet</servlet-class>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>weixin</servlet-name>
        <url-pattern>/weixin</url-pattern>
    </servlet-mapping>
    <!-- 微信公衆號回調-->

  
  <servlet>
    <description></description>
    <display-name>uploadimg</display-name>
    <servlet-name>uploadimg</servlet-name>
    <servlet-class>com.ray.weixin.gz.controller.UploadImgServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>uploadimg</servlet-name>
    <url-pattern>/uploadimg</url-pattern>
  </servlet-mapping>
  
  
</web-app>

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3.上傳圖片servlet—UploadImgServlet

package com.ray.weixin.gz.controller;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.ray.weixin.gz.config.Env;
import com.ray.weixin.gz.service.tempmaterial.TempMaterialService;
import com.ray.weixin.gz.util.AuthHelper;

/**
 * Servlet implementation class UploadImgServlet
 */
public class UploadImgServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public UploadImgServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String mediaId=request.getParameter("serverId");
        System.out.println("serverId:"+mediaId);

        try {
            String accessToken=AuthHelper.getAccessToken(Env.APP_ID, Env.APP_SECRET);
            
            //String savePath=System.getProperty("user.dir").replaceAll("\\\\", "/")+"/WebContent/img/"+mediaId+".png"; 
            String fileDir=request.getSession().getServletContext().getRealPath("").replaceAll("\\\\", "/")+"/img/"; 
            System.out.println("fileDir:"+fileDir);

            //2.調用業務類，獲取臨時素材
            TempMaterialService.getTempMaterial(accessToken, mediaId, fileDir);

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        PrintWriter out = response.getWriter(); 
        out.print("HHHHHHHHHH");  
        out.close();  
        out = null;  
        
        
    }

}

View Code

 

4.素材管理業務類—TempMaterialService.java

package com.ray.weixin.gz.controller;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.ray.weixin.gz.config.Env;
import com.ray.weixin.gz.service.tempmaterial.TempMaterialService;
import com.ray.weixin.gz.util.AuthHelper;

/**
 * Servlet implementation class UploadImgServlet
 */
public class UploadImgServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public UploadImgServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String mediaId=request.getParameter("serverId");
        System.out.println("serverId:"+mediaId);

        try {
            String accessToken=AuthHelper.getAccessToken(Env.APP_ID, Env.APP_SECRET);
            
            //String savePath=System.getProperty("user.dir").replaceAll("\\\\", "/")+"/WebContent/img/"+mediaId+".png"; 
            String fileDir=request.getSession().getServletContext().getRealPath("").replaceAll("\\\\", "/")+"/img/"; 
            System.out.println("fileDir:"+fileDir);

            //2.調用業務類，獲取臨時素材
            TempMaterialService.getTempMaterial(accessToken, mediaId, fileDir);

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        PrintWriter out = response.getWriter(); 
        out.print("HHHHHHHHHH");  
        out.close();  
        out = null;  
        
        
    }

}

View Code

其餘的同上一節