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
[html] view plain copy print ? <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 [java] view plain copy print ? /* * 微信公众平台(JAVA) SDK * * Copyright (c) 2014, Ansitech Network Technology Co.,Ltd All rights reserved. * http://www.ansitech.com/weixin/sdk/ * * 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 * * http://www.apache.org/licenses/LICENSE-2.0 * * 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 [java] view plain copy print ? /* * 微信公众平台(JAVA) SDK * * Copyright (c) 2014, Ansitech Network Technology Co.,Ltd All rights reserved. * http://www.ansitech.com/weixin/sdk/ * * 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 * * http://www.apache.org/licenses/LICENSE-2.0 * * 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 */ @Override public 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。 [java] view plain copy print ? 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 { ... @Override public 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 start XStream xstream = new XStream(new XppDriver() { @Override public HierarchicalStreamWriter createWriter(Writer out) { return new PrettyPrintWriter(out) { @Override protected 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xml xstream.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。如有疑问，请留言。
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