java怎么生成帶用戶微信頭像的圖片，并把這張圖片發(fā)送給用戶。

1、下載生成二維碼所需要的jar包qrcode.jar；2、直接上生成二維碼的java代碼 //需要導(dǎo)入的包import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.File;import javax.imageio.ImageIO;import com.swetake.util.Qrcode; /** * 生成二維碼(QRCode)圖片 * @param content 二維碼圖片的內(nèi)容 * @param imgPath 生成二維碼圖片完整的路徑 * @param ccbpath 二維碼圖片中間的logo路徑 */ public static int createQRCode(String content, String imgPath,String ccbPath) { try { Qrcode qrcodeHandler = new Qrcode(); qrcodeHandler.setQrcodeErrorCorrect('M'); qrcodeHandler.setQrcodeEncodeMode('B'); qrcodeHandler.setQrcodeVersion(7); // System.out.println(content); byte[] contentBytes = content.getBytes("gb2312"); //構(gòu)造一個(gè)BufferedImage對(duì)象 設(shè)置寬、高 BufferedImage bufImg = new BufferedImage(140, 140, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); gs.setBackground(Color.WHITE); gs.clearRect(0, 0, 140, 140); // 設(shè)定圖像顏色 BLACK gs.setColor(Color.BLACK); // 設(shè)置偏移量 不設(shè)置可能導(dǎo)致解析出錯(cuò) int pixoff = 2; // 輸出內(nèi)容 二維碼 if (contentBytes.length 0 contentBytes.length 120) { boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes); for (int i = 0; i codeOut.length; i++) { for (int j = 0; j codeOut.length; j++) { if (codeOut[j][i]) { gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3); } } } } else { System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,120 ]. "); return -1; } Image img = ImageIO.read(new File(ccbPath));//實(shí)例化一個(gè)Image對(duì)象。 gs.drawImage(img, 55, 55, 30, 30, null); gs.dispose(); bufImg.flush(); // 生成二維碼QRCode圖片 File imgFile = new File(imgPath); ImageIO.write(bufImg, "png", imgFile); }catch (Exception e){ e.printStackTrace(); return -100; } return 0; }

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微信公眾平臺(tái)發(fā)送客服消息基于java怎么實(shí)現(xiàn)，求具體代碼？謝謝

這個(gè)代碼可能比較多。。看微信公眾平臺(tái)的api，里面寫(xiě)的很清楚，其實(shí)就是一個(gè)http請(qǐng)求，加上指定的報(bào)文就可以了，用java寫(xiě)還比較簡(jiǎn)單的。。

怎樣用java開(kāi)發(fā)微信

java公眾號(hào)不需要特殊的架構(gòu) ，

從最原始的servlet到流行的ssh ssm框架都可以做 ，

后端通過(guò)網(wǎng)絡(luò)請(qǐng)求微信的接口，

從而獲得請(qǐng)求的數(shù)據(jù) ，

前端可以使用各種前端框架實(shí)現(xiàn)，

比如easyui或者bootstrap都可以，

微信開(kāi)發(fā)文檔中有詳細(xì)的示例 。

如何使用微信sdk java版

1.首先我們新建一個(gè)Java開(kāi)發(fā)包WeiXinSDK

2.包路徑：com.ansitech.weixin.sdk

測(cè)試的前提條件：

假如我的公眾賬號(hào)微信號(hào)為：vzhanqun

我的服務(wù)器地址為：

下面我們需要新建一個(gè)URL的請(qǐng)求地址

我們新建一個(gè)Servlet來(lái)驗(yàn)證URL的真實(shí)性，具體接口參考

接入指南

3.新建com.ansitech.weixin.sdk.WeixinUrlFilter.java

這里我們主要是獲取微信服務(wù)器法師的驗(yàn)證信息，具體驗(yàn)證代碼如下

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package com.ansitech.weixin.sdk;

import com.ansitech.weixin.sdk.util.SHA1;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class WeixinUrlFilter implements Filter {

//這個(gè)Token是給微信開(kāi)發(fā)者接入時(shí)填的

//可以是任意英文字母或數(shù)字，長(zhǎng)度為3-32字符

private static String Token = "vzhanqun1234567890";

@Override

public void init(FilterConfig config) throws ServletException {

System.out.println("WeixinUrlFilter啟動(dòng)成功!");

}

@Override

public void doFilter(ServletRequest req, ServletResponse res,

FilterChain chain) throws IOException, ServletException {

HttpServletRequest request = (HttpServletRequest) req;

HttpServletResponse response = (HttpServletResponse) res;

//微信服務(wù)器將發(fā)送GET請(qǐng)求到填寫(xiě)的URL上,這里需要判定是否為GET請(qǐng)求

boolean isGet = request.getMethod().toLowerCase().equals("get");

System.out.println("獲得微信請(qǐng)求:" + request.getMethod() + " 方式");

if (isGet) {

//驗(yàn)證URL真實(shí)性

String signature = request.getParameter("signature");// 微信加密簽名

String timestamp = request.getParameter("timestamp");// 時(shí)間戳

String nonce = request.getParameter("nonce");// 隨機(jī)數(shù)

String echostr = request.getParameter("echostr");//隨機(jī)字符串

ListString params = new ArrayListString();

params.add(Token);

params.add(timestamp);

params.add(nonce);

//1. 將token、timestamp、nonce三個(gè)參數(shù)進(jìn)行字典序排序

Collections.sort(params, new ComparatorString() {

@Override

public int compare(String o1, String o2) {

return o1.compareTo(o2);

}

});

//2. 將三個(gè)參數(shù)字符串拼接成一個(gè)字符串進(jìn)行sha1加密

String temp = SHA1.encode(params.get(0) + params.get(1) + params.get(2));

if (temp.equals(signature)) {

response.getWriter().write(echostr);

}

} else {

//處理接收消息

}

}

@Override

public void destroy() {

}

}

好了，不過(guò)這里有個(gè)SHA1算法，我這里也把SHA1算法的源碼給貼出來(lái)吧！

4.新建com.ansitech.weixin.sdk.util.SHA1.java

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/*

* 微信公眾平臺(tái)(JAVA) SDK

*

* Copyright (c) 2014, Ansitech Network Technology Co.,Ltd All rights reserved.

*

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

*

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package com.ansitech.weixin.sdk.util;

import java.security.MessageDigest;

/**

* pTitle: SHA1算法/p

*

* @author qsyangyangqisheng274@163.com

*/

public final class SHA1 {

private static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5',

'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

/**

* Takes the raw bytes from the digest and formats them correct.

*

* @param bytes the raw bytes from the digest.

* @return the formatted bytes.

*/

private static String getFormattedText(byte[] bytes) {

int len = bytes.length;

StringBuilder buf = new StringBuilder(len * 2);

// 把密文轉(zhuǎn)換成十六進(jìn)制的字符串形式

for (int j = 0; j len; j++) {

buf.append(HEX_DIGITS[(bytes[j] 4) 0x0f]);

buf.append(HEX_DIGITS[bytes[j] 0x0f]);

}

return buf.toString();

}

public static String encode(String str) {

if (str == null) {

return null;

}

try {

MessageDigest messageDigest = MessageDigest.getInstance("SHA1");

messageDigest.update(str.getBytes());

return getFormattedText(messageDigest.digest());

} catch (Exception e) {

throw new RuntimeException(e);

}

}

}

5.把這個(gè)Servlet配置到web.xml中

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filter

description微信消息接入接口/description

filter-nameWeixinUrlFilter/filter-name

filter-classcom.ansitech.weixin.sdk.WeixinUrlFilter/filter-class

/filter

filter-mapping

filter-nameWeixinUrlFilter/filter-name

url-pattern/api/vzhanqun/url-pattern

/filter-mapping

好了，接入的開(kāi)發(fā)代碼已經(jīng)完成。

6.下面就把地址URL和密鑰Token填入到微信申請(qǐng)成為開(kāi)發(fā)者模式中吧。