Java 如何使用volley库访问restful web服务方法

Java 如何使用volley库访问restful web服务方法,java,android,rest,android-volley,Java,Android,Rest,Android Volley,我已经使用本教程创建了一个restful web服务,在运行本教程之后,我得到了一个自动生成的java文件,其中包含以下代码 public class RestAPI { private final String urlString = "http://125.0.0.174/Handler1.ashx"; private static String convertStreamToUTF8String(InputStream stream) throws IOExceptio

我已经使用本教程创建了一个restful web服务,在运行本教程之后,我得到了一个自动生成的java文件,其中包含以下代码

public class RestAPI {

    private final String urlString = "http://125.0.0.174/Handler1.ashx"; 
    private static String convertStreamToUTF8String(InputStream stream) throws IOException {
    String result = "";
    StringBuilder sb = new StringBuilder();
    try {
        InputStreamReader reader = new InputStreamReader(stream, "UTF-8");
        char[] buffer = new char[4096];
        int readedChars = 0;
        while (readedChars != -1) {
            readedChars = reader.read(buffer);
            if (readedChars > 0)
               sb.append(buffer, 0, readedChars);
        }
        result = sb.toString();
    } catch (UnsupportedEncodingException e){
        e.printStackTrace();
    }
    return result;
}

private String load(String contents) throws IOException {
    URL url = new URL(urlString);
    HttpURLConnection conn = (HttpURLConnection)url.openConnection();
    conn.setRequestMethod("POST");
    conn.setConnectTimeout(60000);
    Log.e("load r2","load r2");
    conn.setDoOutput(true);
    conn.setDoInput(true);
    OutputStreamWriter w = new OutputStreamWriter(conn.getOutputStream());
    w.write(contents);
    w.flush();
    InputStream istream = conn.getInputStream();
    String result = convertStreamToUTF8String(istream);
    return result;
}

private Object mapObject(Object o) {
    Object finalValue = null;
    if (o.getClass() == String.class) {
        finalValue = o;
    }
    else if (Number.class.isInstance(o)) {
        finalValue = String.valueOf(o);
    } else if (Date.class.isInstance(o)) {
        SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss", new Locale("en", "USA"));
        finalValue = sdf.format((Date)o);
    }
    else if (Collection.class.isInstance(o)) {
        Collection<?> col = (Collection<?>) o;
        JSONArray jarray = new JSONArray();
        for (Object item : col) {
            jarray.put(mapObject(item));
        }
        finalValue = jarray;
    } else {
        Map<String, Object> map = new HashMap<String, Object>();
        Method[] methods = o.getClass().getMethods();
        for (Method method : methods) {
            if (method.getDeclaringClass() == o.getClass()
                    && method.getModifiers() == Modifier.PUBLIC
                    && method.getName().startsWith("get")) {
                String key = method.getName().substring(3);
                try {
                    Object obj = method.invoke(o, null);
                    Object value = mapObject(obj);
                    map.put(key, value);
                    finalValue = new JSONObject(map);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
    return finalValue;
}

public JSONObject GetDoctors(String Terr_Code) throws Exception {
    JSONObject result = null;
    JSONObject o = new JSONObject();
    JSONObject p = new JSONObject();
    o.put("interface","RestAPI");
    o.put("method", "GetDoctors");
    p.put("Terr_Code",mapObject(Terr_Code));
    o.put("parameters", p);
    String s = o.toString();
    String r = load(s);
    result = new JSONObject(r);
    return result;
}

public JSONObject GetUserDetail(String IMEINO) throws Exception {
    JSONObject result = null;
    JSONObject o = new JSONObject();
    JSONObject p = new JSONObject();
    o.put("interface","RestAPI");
    o.put("method", "GetUserDetail");
    p.put("IMEINO",mapObject(IMEINO));
    o.put("parameters", p);
    String s = o.toString();
    String r = load(s);
    result = new JSONObject(r);
    return result;
}
}
公共类RestAPI{
私有最终字符串urlString=”http://125.0.0.174/Handler1.ashx"; 
私有静态字符串convertStreamToUTF8String(InputStream流)引发IOException{
字符串结果=”;
StringBuilder sb=新的StringBuilder();
试一试{
InputStreamReader reader=新的InputStreamReader(流,“UTF-8”);
char[]buffer=新字符[4096];
int readedChars=0;
while(readedChars!=-1){
readedChars=reader.read(缓冲区);
如果(读取字符>0)
sb.追加(缓冲区,0,readedChars);
}
结果=sb.toString();
}捕获(不支持的编码异常e){
e、 printStackTrace();
}
返回结果;
}
私有字符串加载(字符串内容)引发IOException{
URL=新URL(URL字符串);
HttpURLConnection conn=(HttpURLConnection)url.openConnection();
conn.setRequestMethod(“POST”);
连接设置连接超时(60000);
Log.e(“负载r2”,“负载r2”);
连接设置输出(真);
conn.setDoInput(真);
OutputStreamWriter w=新的OutputStreamWriter(conn.getOutputStream());
w、 写(内容);
w、 冲洗();
InputStream istream=conn.getInputStream();
字符串结果=convertStreamToUTF8String(istream);
返回结果;
}
私有对象映射对象(对象o){
对象finalValue=null;
if(o.getClass()==String.class){
最终价值=o;
}
else if(编号、类别、实例(o)){
finalValue=String.valueOf(o);
}else if(日期、类别、持续时间(o)){
SimpleDateFormat sdf=新SimpleDateFormat(“MM/dd/yyyy hh:MM:ss”,新语言环境(“en”,“USA”);
最终值=sdf.格式((日期)o);
}
else if(Collection.class.isInstance(o)){
集合col=(集合)o;
JSONArray jarray=新的JSONArray();
用于(对象项:col){
jarray.put(映射对象(项));
}
最终价值=jarray;
}否则{
Map Map=newhashmap();
方法[]方法=o.getClass().getMethods();
用于(方法:方法){
if(method.getDeclaringClass()==o.getClass()
&&方法.getModifiers()==Modifier.PUBLIC
&&方法.getName().startsWith(“get”)){
String key=method.getName().substring(3);
试一试{
Object obj=method.invoke(o,null);
对象值=映射对象(obj);
map.put(键、值);
最终值=新的JSONObject(映射);
}捕获(例外e){
e、 printStackTrace();
}
}
}
}
返回最终值;
}
公共JSONObject GetDoctors(字符串Terr_代码)引发异常{
JSONObject结果=null;
JSONObject o=新的JSONObject();
JSONObject p=新的JSONObject();
o、 put(“接口”、“重新启动PI”);
o、 put(“方法”、“获取医生”);
p、 put(“地球代码”,地图对象(地球代码));
o、 put(“参数”,p);
字符串s=o.toString();
字符串r=荷载;
结果=新的JSONObject(r);
返回结果;
}
公共JSONObject GetUserDetail(字符串IMEINO)引发异常{
JSONObject结果=null;
JSONObject o=新的JSONObject();
JSONObject p=新的JSONObject();
o、 put(“接口”、“重新启动PI”);
o、 put(“方法”、“GetUserDetail”);
p、 put(“IMEINO”,映射对象(IMEINO));
o、 put(“参数”,p);
字符串s=o.toString();
字符串r=荷载;
结果=新的JSONObject(r);
返回结果;
}
}
我在async任务中调用这个类,一切都很好,但我想通过截击使用它,因为async任务很慢。 这个类只有一个url,我不知道如何为单个方法调用这个url,我尝试了下面的代码,但得到了错误的url异常。请告诉我如何使用单独的URL访问RESTAPI的方法

public void requestJSON() {

          String tag_json_obj = "json_obj_req";

          final ProgressDialog pDialog = new ProgressDialog(context);
          pDialog.setMessage("Loading...");
          pDialog.show();
          JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET, null,
                null, new Response.Listener<JSONObject>() {

                   @Override
                   public void onResponse(JSONObject response) {
                        try {
                             RestAPI restAPI = new RestAPI(); 
                             response = restAPI.GetDoctors(terrcode);                            
                        }   
                        catch (Exception e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

                 display.setText(response.toString());

                      pDialog.hide();
                   }

              }, new Response.ErrorListener() {

                   @Override
                   public void onErrorResponse(VolleyError error) {
                      display.setText(error.toString());
                      pDialog.hide();
                   }
                });

          // Adding request to request queue
          VolleySingleton.getInstance().addToRequestQueue(jsonObjReq,
                tag_json_obj);
       }
public void requestJSON(){
字符串tag_json_obj=“json_obj_req”;
final ProgressDialog pDialog=新建ProgressDialog(上下文);
设置消息(“加载…”);
pDialog.show();
JsonObjectRequest JSONObjectReq=新的JsonObjectRequest(Method.GET,null,
null,新响应。侦听器(){
@凌驾
公共void onResponse(JSONObject响应){
试一试{
RestAPI RestAPI=新RestAPI();
响应=restAPI.GetDoctors(terrcode);
}   
捕获(例外e){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
display.setText(response.toString());
pDialog.hide();
}
},new Response.ErrorListener(){
@凌驾
公共无效onErrorResponse(截击错误){
display.setText(error.toString());
pDialog.hide();
}
});
//将请求添加到请求队列
VolleySingleton.getInstance().addToRequestQueue(jsonObjReq,
标签(json)(obj);;
}

使用截击作为截击服务:

public class VolleyService {

    private static VolleyService instance;
    private RequestQueue requestQueue;
    private ImageLoader imageLoader;

    private VolleyService(Context context) {
        requestQueue = Volley.newRequestQueue(context);

        imageLoader = new ImageLoader(requestQueue, new ImageLoader.ImageCache() {
            private final LruCache<String, Bitmap> cache = new LruCache<String, Bitmap>(20);

            @Override
            public Bitmap getBitmap(String url) {
                return cache.get(url);
            }

            @Override
            public void putBitmap(String url, Bitmap bitmap) {
                cache.put(url,bitmap);
            }
        });
    }

    public static VolleyService getInstance(Context context) {
        if (instance == null) {
            synchronized(VolleyService.class) {
                if (instance == null) {
                    instance = new VolleyService(context);
                }
            }
        }
        return instance;
    }

    public RequestQueue getRequestQueue() {
        return requestQueue;
    }

    public ImageLoader getImageLoader() {
        return imageLoader;
    }
}
公共类截击服务{
私有静态截击服务实例;
私有请求队列请求队列;
私有图像加载器;
专用截击服务(上下文){
requestQueue=Volley.newRequestQueue(上下文);
imageLoader=new imageLoader(requestQueue,new imageLoader.ImageCache(){
专用最终LruCache缓存=新LruCache(20);
@凌驾
公共图书馆
RequestQueue queue = VolleyService.getInstance(this.getContext()).getRequestQueue();
StringRequest request = new StringRequest(url, new Response.Listener<String>() {    
                @Override
                public void onResponse(String response) {
                    // we got the response, now our job is to handle it
                    try {
//Here you parse your JSON - best approach is to use GSON for deserialization
                        getJsonFromResponse(response);
                    } catch (RemoteException | OperationApplicationException e) {
                        e.printStackTrace();
                    }
                }
            }, new Response.ErrorListener() {

                @Override
                public void onErrorResponse(VolleyError error) {
                    //something happened, treat the error.
                    Log.e("Error", error.toString());
                }
            });

            queue.add(request);