大家好，今天我给大家带来的是微信开发之发送消息。
用户关注微信号，那么肯定是为了得到某种功能，假如用户发送文本信息“电话”，我们能给用户发送我的联系电话，这样是不是很友好呢？
好，昨天我们已经接受到了用户发送的信息，，今天我们就对用户进行回复消息吧！
首先，回复消息有6个种类：
1 回复文本消息2 回复图片消息3 回复语音消息4 回复视频消息5 回复音乐消息6 回复图文消息
我们先来做一个简单的回复文本消息的例子吧！
回复文本消息
<xml><ToUserName><![CDATA[toUser]]></ToUserName><FromUserName><![CDATA[fromUser]]></FromUserName><CreateTime>12345678</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[你好]]></Content></xml>1.新建发送消息基本对象com.ansitech.weixin.sdk.message.OutputMessage.java/* * 微信公众平台(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.message;/** * 微信发送被动响应消息的抽象类 * * <p>应用程序需要定义一个子类，来实现具体方法</p> * * @author qsyang<yangqisheng274@163.com> */public abstract class OutputMessage implements java.io.Serializable {/*** 接收方帐号（收到的OpenID）*/private String ToUserName;/*** 开发者微信号*/private String FromUserName;/*** 消息创建时间 （整型）*/private Long CreateTime;/*** 获取 接收方帐号（收到的OpenID）** @return 接收方帐号（收到的OpenID）*/public String getToUserName() {return ToUserName;}/*** 设置 接收方帐号（收到的OpenID）** @return 接收方帐号（收到的OpenID）*/public String getFromUserName() {return FromUserName;}/*** 获取 消息创建时间 （整型）** @return 消息创建时间 （整型）*/public Long getCreateTime() {return CreateTime;}/*** 获取 消息类型** @return 消息类型*/public abstract String getMsgType();}2.新建文本消息发送对象com.ansitech.weixin.sdk.message.TextOutputMessage.java/* * 微信公众平台(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.message;/** * 这个类实现了<tt>OutputMessage</tt>，用来回复文本消息 * * <p>提供了获取文本内容<code>getContent()</code>等主要方法.</p> * * @author qsyang<yangqisheng274@163.com> */public class TextOutputMessage extends OutputMessage {/*** 消息类型:文本消息*/private String MsgType = "text";/*** 文本消息*/private String Content;/*** 创建一个新的 Output Message.并且MsgType的值为text.*/public TextOutputMessage() {}/*** 创建一个自定义文本内容content的Output Message.** @param content 文本内容*/public TextOutputMessage(String content) {Content = content;}/*** 获取 消息类型** @return 消息类型*/@Overridepublic String getMsgType() {return MsgType;}/*** 获取 文本消息** @return 文本消息*/public String getContent() {return Content;}/*** 设置 文本消息** @param content 文本消息*/public void setContent(String content) {Content = content;}}3.修改com.ansitech.weixin.sdk.WeixinUrlFilter.java中接受文本消息部分代码。package com.ansitech.weixin.sdk;import com.ansitech.weixin.sdk.message.InputMessage;import com.ansitech.weixin.sdk.message.MsgType;import com.ansitech.weixin.sdk.message.OutputMessage;import com.ansitech.weixin.sdk.message.TextOutputMessage;import com.ansitech.weixin.sdk.util.SHA1;import com.thoughtworks.xstream.XStream;import com.thoughtworks.xstream.core.util.QuickWriter;import com.thoughtworks.xstream.io.HierarchicalStreamWriter;import com.thoughtworks.xstream.io.xml.DomDriver;import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;import com.thoughtworks.xstream.io.xml.XppDriver;…public class WeixinUrlFilter implements Filter {…@Overridepublic void doFilter(ServletRequest req, ServletResponse res,FilterChain chain) throws IOException, ServletException {HttpServletRequest request = (HttpServletRequest) req;HttpServletResponse response = (HttpServletResponse) res;…if (isGet) {…} else {…//根据消息类型获取对应的消息内容if (msgType.equals(MsgType.Text.toString())) {try {//文本消息System.out.println("开发者微信号：" + inputMsg.getToUserName());System.out.println("发送方帐号：" + inputMsg.getFromUserName());System.out.println("消息创建时间：" + inputMsg.getCreateTime());System.out.println("消息内容：" + inputMsg.getContent());System.out.println("消息Id：" + inputMsg.getMsgId());//发送文本消息 startXStream xstream = new XStream(new XppDriver() {@Overridepublic HierarchicalStreamWriter createWriter(Writer out) {return new PrettyPrintWriter(out) {@Overrideprotected void writeText(QuickWriter writer,String text) {if (!text.startsWith("<![CDATA[")) {text = "<![CDATA[" + text + "]]>";}writer.write(text);}};}});//创建文本发送消息对象TextOutputMessage outputMsg = new TextOutputMessage();outputMsg.setContent("你的消息已经收到，谢谢！");setOutputMsgInfo(outputMsg, inputMsg);//设置对象转换的XML根节点为xmlxstream.alias("xml", outputMsg.getClass());//将对象转换为XML字符串String xml = xstream.toXML(outputMsg);//将内容发送给微信服务器，发送到用户手机response.getWriter().write(xml);} catch (Exception ex) {System.out.println("消息接受和发送出现异常!");ex.printStackTrace();}}}}//设置详细信息private static void setOutputMsgInfo(OutputMessage oms,InputMessage msg) throws Exception {// 设置发送信息Class<?> outMsg = oms.getClass().getSuperclass();Field CreateTime = outMsg.getDeclaredField("CreateTime");Field ToUserName = outMsg.getDeclaredField("ToUserName");Field FromUserName = outMsg.getDeclaredField("FromUserName");ToUserName.setAccessible(true);CreateTime.setAccessible(true);FromUserName.setAccessible(true);CreateTime.set(oms, new Date().getTime());ToUserName.set(oms, msg.getFromUserName());FromUserName.set(oms, msg.getToUserName());}…}以上代码给出了发送消息的部分，“…”的部分请参考我的上俩篇文章。
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