android客户端和struts框架使用json数据通信很方便。参考了网上的一些资料和博客
struts.xml文件一定要注意小心：今天因为粗心浪费了不少时间。。
<package name="struts2" extends="json-default" namespace="/">一定不要写成
<package name="struts2" extends="struts-default" namespace="/">android客户端得json数据。服务器端：
其中一个action配置如：
<action name="returnGroupList" class="flow.com.cn.action.GroupPurchaseAction" method="returnGroupPurchaseInfoList">
??? ??? ?? <result name="success" type="json">?
?????????? </result>
??? ??? </action>
服务器端其他的和一样，返回单个实体对象和实体列表没有区别。
json返回结果类型,那么这个响应结果不需要返回给任何视图层,JSON会将Action里的状态信息序列化为JSON指定格式的数据,并将该数据返回。
<result name="success" type="json">
只要为Action指定类型为json返回结果类型,那么这个响应结果不需要返回给任何视图层,JSON会将Action里的状态信息序列化为JSON指定格式的数据,并将该数据返回
??? ??? ?? <param name="includeProperties">?
??????????????????? flowinfo\.id,flowinfo\.monthusedflow,flowinfo\.dayusedflow?
?????????? </param>?
<result>
?
服务器端接收android客户端传递过来的数据其中一个插入方法
public Boolean insertFeedbackInfo(FeedbackInfo feedback)throws Throwable{
??? ??? // TODO Auto-generated method stub
??? ??? String sql="insert into feedbackinfo(content,time)values('"+feedback.getContent()+"','"+feedback.getTime()+"')";
??? ??? Connection conn=null;
??? ??? PreparedStatement ps=null;
??? ??? conn=(Connection) DBUtilsC3P0.getInstance().getConnection();
??? ??? try {
??? ??? ??? ps=conn.prepareStatement(sql);
??? ??? ??? if(ps.execute())
??? ??? ??? ??? return true;
??? ??? } catch (SQLException e) {
??? ??? ??? // TODO Auto-generated catch block
??? ??? ??? e.printStackTrace();
??? ??? }finally{
??? ??? ??? ps.close();
??? ??? ??? conn.close();
??? ??? }
??? ???
??? ??? return false;
??? }
struts.xml中配置为：??
? <action name="insertFeedbackInfo" class="flow.com.cn.action.FeedbackInfoAction" method="insertFeedbackInfo">
??? ??? <result name="success">/index.jsp</result>
?? </action>
android客户端：
@Override
??? public Boolean insertFeedbackInfo(String content,String time) {
??? ??? //192.168.1.122:8089为本机IP地址，不能用localhost代替
??? ??? ? String path = "http://192.168.1.122:8089/FlowServer/insertFeedbackInfo.action";
//??? ??? ? http://192.168.1.122:8089/Strust2Json/csdn/listNewsGoods.action
??? ??? ? Map<String,String> params = new HashMap<String,String>();
??? ??? ? params.put("content", content);
??? ??? ? params.put("time",time);
??? ??? ? Boolean res=false;
??? ??? try {
??? ??? ??? res=sendHttpClientPOSTRequest(path,params,"UTF-8");
??? ??? ??? System.out.println(res+"..............");
??? ??? ??? return res;
??? ??? } catch (Exception e) {
??? ??? ??? // TODO Auto-generated catch block
??? ??? ??? e.printStackTrace();
??? ??? ???
??? ??? }
??? return res;
??? ??? ???
??? ??? }
httpclient请求方法
?private? boolean sendHttpClientPOSTRequest(String path,
??? ??? ??? ?? Map<String, String> params, String encoding) throws Exception {
??? ??? ??? ? List<NameValuePair> pairs = new ArrayList<NameValuePair>();//存放请求参数
??? ??? ??? ?
??? ??? ??? ? for(Map.Entry<String, String> entry:params.entrySet()){
??? ??? ??? ?? pairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
??? ??? ??? ? }
??? ??? ??? ? //防止客户端传递过去的参数发生乱码，需要对此重新编码成UTF-8
??? ??? ??? ? UrlEncodedFormEntity entity = new UrlEncodedFormEntity(pairs,encoding);
??? ??? ??? ? HttpPost httpPost = new HttpPost(path);
??? ??? ??? ? httpPost.setEntity(entity);
??? ??? ??? ? DefaultHttpClient client = new DefaultHttpClient();
??? ??? ??? ? HttpResponse response = client.execute(httpPost);
??? ??? ??? ? if(response.getStatusLine().getStatusCode()==200){
??? ??? ??? ?? return true;
??? ??? ??? ? }
??? ??? ??? ? return false;
??? ??? ??? ?}
/**
??? ? * 发送post请求
??? ? * @param path 请求路径
??? ? * @param params 请求参数
??? ? * @param encoding 编码
??? ? * @return 请求是否成功
??? ? */
??? ?private static boolean sendPOSTRequest(String path,
??? ?? Map<String, String> params, String encoding) throws Exception{
??? ? StringBuilder data = new StringBuilder(path);
??? ? for(Map.Entry<String, String> entry:params.entrySet()){
??? ?? data.append(entry.getKey()).append("=");
??? ?? //防止客户端传递过去的参数发生乱码，需要对此重新编码成UTF-8
??? ?? data.append(URLEncoder.encode(entry.getValue(),encoding));
??? ?? data.append("&");
??? ? }
??? ?
??? ? data.deleteCharAt(data.length() - 1);
??? ?
??? ? byte[] entity = data.toString().getBytes();//得到实体数据
??? ? HttpURLConnection conn = (HttpURLConnection) new URL(path).openConnection();
??? ? conn.setConnectTimeout(5000);
??? ? conn.setRequestMethod("POST");
??? ?
??? ? conn.setDoOutput(true);//设置为允许对外输出数据
??? ?
??? ? conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
??? ? conn.setRequestProperty("Content-Length", String.valueOf(entity.length));
??? ?
??? ? OutputStream outStream = conn.getOutputStream();
??? ? outStream.write(entity);//写到缓存
??? ?
??? ? if(conn.getResponseCode()==200){//只有取得服务器返回的http协议的任何一个属性时才能把请求发送出去
??? ?? return true;
??? ? }
??? ?
??? ? return false;
??? ?}
??? ?/**
??? ? * 发送GET请求
??? ? * @param path 请求路径
??? ? * @param params 请求参数
??? ? * @return 请求是否成功
??? ? * @throws Exception
??? ? */
??? ?private static boolean sendGETRequest(String path,
??? ?? Map<String, String> params,String encoding) throws Exception {
??? ? StringBuilder url = new StringBuilder(path);
??? ? url.append("?");
??? ? for(Map.Entry<String, String> entry:params.entrySet()){
??? ?? url.append(entry.getKey()).append("=");
??? ?? //get方式请求参数时对参数进行utf-8编码，URLEncoder
??? ?? //防止客户端传递过去的参数发生乱码，需要对此重新编码成UTF-8
??? ?? url.append(URLEncoder.encode(entry.getValue(), encoding));
??? ?? url.append("&");
??? ? }
??? ? url.deleteCharAt(url.length()-1);
??? ? HttpURLConnection conn = (HttpURLConnection) new URL(url.toString()).openConnection();
??? ? conn.setConnectTimeout(5000);
??? ? conn.setRequestMethod("GET");
??? ? if(conn.getResponseCode() == 200){
??? ?? return true;
??? ? }
??? ? return false;
??? ?}
android客户端要导入gson.jar包。
?
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