android 调用resestful接口的例子

package com.api.demo; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpDelete; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpPut; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams; import org.apache.http.protocol.HTTP; import android.util.Log; import com.api.demo.model.State; import com.api.demo.util.LogUtil; import com.api.demo.util.PropertiesUtil; import com.google.gson.Gson; /** * * Restful 客户端类 * * @author Chasel.li * */ public class RestTemplate { private static final String LOGTAG = LogUtil.makeLogTag(RestTemplate.class); private HttpClient client = null; private String url = PropertiesUtil.getUrl(); private Gson gson; private static List<State> states; public RestTemplate () { HttpParams httpParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParams, 50 * 1000); HttpConnectionParams.setSoTimeout(httpParams, 20 * 1000); client = new DefaultHttpClient(httpParams); gson = new Gson(); } /** * Restful get请求,可用{@link packageUri}对url进行参数的封装 * @return */ public String httpGetDemo() { HttpGet httpGet = new HttpGet(url); HttpResponse response = null; StringBuffer result = new StringBuffer(); try { response = client.execute(httpGet); } catch (ClientProtocolException e) { return "httpGetDemo Request ClientProtocolException :" + e.getMessage(); } catch (IOException e) { return "httpGetDemo Request IOException :" + e.getMessage(); } try { InputStream inputStream = response.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String responseResult = ""; while ((responseResult = reader.readLine()) != null) { result.append(responseResult); } reader.close(); } catch (IllegalStateException e) { return "httpGetDemo Response IllegalStateException" + e.getMessage(); } catch (IOException e) { return "httpGetDemo Response IOException" + e.getMessage(); } Log.i(LOGTAG, result.toString()); return result.toString(); } /** * Restful post请求, 可以使用{@code HttpEntity}对参数进行封装 * @return */ public String httpPostDemo() { StringBuffer result = new StringBuffer(); HttpPost httpPost = new HttpPost(url); HttpResponse response = null; HttpEntity httpEntity = null; final List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(); params.add(new BasicNameValuePair("states", gson.toJson(getStates()))); try { httpEntity = new UrlEncodedFormEntity(params, HTTP.UTF_8); } catch (UnsupportedEncodingException e) { return "HttpPostDemo request httpEntity UnsupportedEncodingException:" + e.getMessage(); } httpPost.setEntity(httpEntity); try { response = client.execute(httpPost); } catch (ClientProtocolException e) { return "httpPostDemo Request ClientProtocolException:" + e.getMessage(); } catch (IOException e) { return "httpPostDemo Request IOException" + e.getMessage(); } try { InputStream inputStream = response.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String responseResult = ""; while ((responseResult = reader.readLine()) != null) { result.append(responseResult); } reader.close(); } catch (IllegalStateException e) { return "httpPostDemo Response IllegalStateException:" + e.getMessage(); } catch (IOException e) { return "httpPostDemo Response IOException" + e.getMessage(); } Log.i(LOGTAG, result.toString()); return result.toString(); } /** * Restful put请求, 可以使用{@code HttpEntity}对参数进行封装, * 该方法的url用httpEntity封装,参数会出现问题, 直接拼装URl服务器会正确返回, * 如果要使用httpEntity进行参数的封装, 请注意该问题 * @return 返回服务器端数据 */ public String httpPutDemo() { StringBuffer result = new StringBuffer(); HttpPut httpPut = new HttpPut(url+"?state=hello"); HttpResponse response = null; HttpEntity httpEntity = null; final List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(); State state = new State(); state.setName("南京"); state.setAbbreviation("NJ"); params.add(new BasicNameValuePair("state", gson.toJson(state))); try { httpEntity = new UrlEncodedFormEntity(params, HTTP.UTF_8); } catch (UnsupportedEncodingException e) { return "httpPutDemo request httpEntity UnsupportedEncodingException:" + e.getMessage(); } // httpPut.setEntity(httpEntity); try { response = client.execute(httpPut); } catch (ClientProtocolException e) { return "httpPutDemo Request ClientProtocolException"; } catch (IOException e) { return "httpPutDemo Request IOException"; } try { InputStream inputStream = response.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String responseResult = ""; while ((responseResult = reader.readLine()) != null) { result.append(responseResult); } reader.close(); } catch (IllegalStateException e) { return "httpPutDemo Response IllegalStateException:" + e.getMessage(); } catch (IOException e) { return "httpPutDemo Response IOException:" + e.getMessage(); } Log.i(LOGTAG, result.toString()); return result.toString(); } /** * Restful delete请求 * @return 返回服务器端数据 */ public String httpDeleteDemo() { StringBuffer result = new StringBuffer(); final Map<String, String> params = new HashMap<String, String>(); params.put("id", "1"); HttpDelete httpDelete = new HttpDelete(packageUri(url, params)); HttpResponse response = null; try { response = client.execute(httpDelete); } catch (ClientProtocolException e) { return "httpDeleteDemo Request ClientProtocolException:" + e.getMessage(); } catch (IOException e) { return "httpDeleteDemo Request IOException:" + e.getMessage(); } try { InputStream inputStream = response.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String responseResult = ""; while ((responseResult = reader.readLine()) != null) { result.append(responseResult); } reader.close(); } catch (IllegalStateException e) { return "httpDeleteDemo Response IllegalStateException:" + e.getMessage(); } catch (IOException e) { return "httpDeleteDemo Response IOException:" + e.getMessage(); } Log.i(LOGTAG, result.toString()); return result.toString(); } /** * 封装URL, 在get和delete请求中不能使用{@code HttpEntity}封装参数, 用该方法封装 * @param uri 原始uri * @param params 请求参数列表 * @return 原始uri和参数组成的新uri */ @SuppressWarnings("rawtypes") public String packageUri(String uri, Map<String, String> params) { String paramStr = ""; Iterator<?> iter = params.entrySet().iterator(); while (iter.hasNext()) { Map.Entry entry = (Map.Entry) iter.next(); String key = entry.getKey().toString(); String val = entry.getValue().toString(); try {//在请求参数中,值是中文时必须要进行UTF-8的转码 paramStr +=