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。