利用GSON解析JSON数据
jopen
10年前
main.xml如下:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginTop="20dip" android:textSize="22sp" android:text="GSON测试" /> <Button android:id="@+id/button" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginTop="180dip" android:text="将复杂JSON转换为JavaBean格式" /> </RelativeLayout>
TestJavaBean如下:
package com.rbt; public class TestJavaBean { public String COUPON_NO; public String COUPON_NM; public String COUPON_IMG; public String COUPON_CP; public String COUPON_EXPIRE_DATE; public String COUPON_EXPIRE_START_DM; public String COUPON_EXPIRE_END_DM; public String COUPON_grant_FLAG; public TestJavaBean() { super(); } public String getCOUPON_NO() { return COUPON_NO; } public void setCOUPON_NO(String cOUPON_NO) { COUPON_NO = cOUPON_NO; } public String getCOUPON_NM() { return COUPON_NM; } public void setCOUPON_NM(String cOUPON_NM) { COUPON_NM = cOUPON_NM; } public String getCOUPON_IMG() { return COUPON_IMG; } public void setCOUPON_IMG(String cOUPON_IMG) { COUPON_IMG = cOUPON_IMG; } public String getCOUPON_CP() { return COUPON_CP; } public void setCOUPON_CP(String cOUPON_CP) { COUPON_CP = cOUPON_CP; } public String getCOUPON_EXPIRE_DATE() { return COUPON_EXPIRE_DATE; } public void setCOUPON_EXPIRE_DATE(String cOUPON_EXPIRE_DATE) { COUPON_EXPIRE_DATE = cOUPON_EXPIRE_DATE; } public String getCOUPON_EXPIRE_START_DM() { return COUPON_EXPIRE_START_DM; } public void setCOUPON_EXPIRE_START_DM(String cOUPON_EXPIRE_START_DM) { COUPON_EXPIRE_START_DM = cOUPON_EXPIRE_START_DM; } public String getCOUPON_EXPIRE_END_DM() { return COUPON_EXPIRE_END_DM; } public void setCOUPON_EXPIRE_END_DM(String cOUPON_EXPIRE_END_DM) { COUPON_EXPIRE_END_DM = cOUPON_EXPIRE_END_DM; } public String getCOUPON_grant_FLAG() { return COUPON_grant_FLAG; } public void setCOUPON_grant_FLAG(String cOUPON_grant_FLAG) { COUPON_grant_FLAG = cOUPON_grant_FLAG; } @Override public String toString() { return "TestJavaBean [COUPON_NO=" + COUPON_NO + ", COUPON_NM=" + COUPON_NM + ", COUPON_IMG=" + COUPON_IMG + ", COUPON_CP=" + COUPON_CP + ", COUPON_EXPIRE_DATE=" + COUPON_EXPIRE_DATE + ", COUPON_EXPIRE_START_DM=" + COUPON_EXPIRE_START_DM + ", COUPON_EXPIRE_END_DM=" + COUPON_EXPIRE_END_DM + ", COUPON_grant_FLAG=" + COUPON_grant_FLAG + "]"; } }
MainActivity如下:
package com.rbt; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.lang.reflect.Type; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.params.HttpConnectionParams; import org.apache.http.protocol.HTTP; import org.json.JSONArray; import org.json.JSONObject; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import com.google.gson.Gson; import com.google.gson.reflect.TypeToken; /** * Demo描述: * 利用GSON解析JSON数据--将json数据封装到ArrayList<Object>中 * 注意: * JavaBean中的每个变量名于每个JSON数据的字段严格对应. * 比如大小写 * */ public class MainActivity extends Activity { private Gson mGson; private Button mButton; private String mJSONData; private ArrayList<TestJavaBean> mTestJavaBeansArrayList; private String mUrl="your url"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); init(); } private void init(){ mButton=(Button) findViewById(R.id.button); mButton.setOnClickListener(new ClickListenerImpl()); } private class ClickListenerImpl implements OnClickListener { @Override public void onClick(View v) { switch (v.getId()) { case R.id.button: try { mJSONData = getJSONData(); mGson = new Gson(); JSONObject jsonObject = new JSONObject(mJSONData); JSONArray jsonArray = jsonObject.getJSONArray("COUPON_LIST"); System.out.println("需要转换的JSONArray=" + jsonArray.toString()); Type listType = new TypeToken<ArrayList<TestJavaBean>>() {}.getType(); mTestJavaBeansArrayList = mGson.fromJson(jsonArray.toString(), listType); System.out.println("linkedList.size()="+ mTestJavaBeansArrayList.size()); for (int i = 0; i < mTestJavaBeansArrayList.size(); i++) { TestJavaBean testJavaBean = mTestJavaBeansArrayList.get(i); System.out.println("现在是第" + i + "个数据:" + " "+ testJavaBean.toString()); } } catch (Exception e) { } break; default: break; } } } public String getJSONData() { HttpEntity httpEntity = null; HttpResponse response = null; try { Map<String, String> paramsHashMap = new HashMap<String, String>(); paramsHashMap.put("IF_NO", "IF0002"); paramsHashMap.put("UID", "12345"); HttpPost httpPost = new HttpPost(mUrl); DefaultHttpClient httpClient = getHttpClient(); List<BasicNameValuePair> postData = new ArrayList<BasicNameValuePair>(); for (Map.Entry<String, String> entry : paramsHashMap.entrySet()) { postData.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } UrlEncodedFormEntity entity = new UrlEncodedFormEntity(postData,HTTP.UTF_8); httpPost.setEntity(entity); response = httpClient.execute(httpPost); httpEntity = response.getEntity(); InputStream is = httpEntity.getContent(); StringBuffer sb = new StringBuffer(); BufferedReader br = new BufferedReader(new InputStreamReader(is)); String line = ""; while ((line = br.readLine()) != null) { sb.append(line); } return sb.toString(); } catch (Exception e) { } return null; } private DefaultHttpClient getHttpClient() { DefaultHttpClient httpClient = new DefaultHttpClient(); HttpConnectionParams.setConnectionTimeout(httpClient.getParams(), 8000); HttpConnectionParams.setSoTimeout(httpClient.getParams(), 10000); HttpConnectionParams.setTcpNoDelay(httpClient.getParams(), true); return httpClient; } }