xml格式；json格式；
2、JSON：
* 概念：是一种轻量级的数据交换格式；采用的是完全独立于语言的文本格式；
3、json数据格式分类：
* key-values 格式； {name:"mike",age : 18}
* 对象格式； {{name:"mike",age : 18},{name:"mike2",age : 19}} 注意：{} 为对象；
* 数组格式：{name:["","",""],age:38} 注意：[] 表示的是数组；
* 数组中包含对象：{students:[{},{}],age:33}
小贴士：万事万物皆对象；
3、将数据以JSON 的格式实现：案例如下
java代码：
package com.example.json_parse;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EncodingUtils;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Xml.Encoding;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.JsPromptResult;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button parseJSON,achieveJSON;
private EditText show;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/* 组件对象 */
parseJSON = (Button) findViewById(R.id.parseJSON);
achieveJSON = (Button) findViewById(R.id.achieveJSON);
show = (EditText) findViewById(R.id.show);
/* 设置事件监听器：将数据用JSON格式表示 */
achieveJSON.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
achieve_JSON();
}
});
/* 设置事件监听器：解析JSON */
parseJSON.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
parse_JSON();
}
});
}
/* 解析JSON格式文本为字符串 */
protected void parse_JSON(){
try{
/* 首先获取服务器返回的JSON文件信息，保存在一个jsp页面中 */
String path ="http://192.168.16.16:8080/index1.jsp";
/* 设置访问方式;并通过IP地址访问服务器 */
HttpGet httpGet = new HttpGet(path);
/* 发送请求 */
HttpClient httpClient = new DefaultHttpClient();
HttpResponse httpResponse = httpClient.execute(httpGet);
/* 上述请求发送到服务器后会返回请求码，可以用来判断是否请求成功,200代表成功 */
if(httpResponse.getStatusLine().getStatusCode()==200){
Toast.makeText(MainActivity.this, "请求成功！", 1000).show();
HttpEntity httpEntity = httpResponse.getEntity();
/* 获取数据：工具类EntityUtils , 能将得到的数据转换为字符串 */
String info = EntityUtils.toString(httpEntity, "UTF-8");
/* 对字符串操作：将字符串转换为 JSONObject 对象 */
JSONObject person = new JSONObject(info);
/**********************************************************************/
/* key==students 的值 */
JSONObject students_value = (JSONObject) person.get("students");
/* key==school的值 */
String school_value = EncodingUtils.getString(person.getString("school").getBytes(),"GBK") ;
/**********************************************************************/
/**********************************************************************/
/* 在key==students 的值中，key==c1 的值 *//* key==c2 的值 */
JSONObject students_c1_value = students_value.getJSONObject("c1");
JSONObject students_c2_value = students_value.getJSONObject("c2");
/**********************************************************************/
/**********************************************************************/
/* 在key==students ,key==c1 中，并且：key==class / number /detail */
String c1_class_value = students_c1_value.getString("class");
String c1_number_value = students_c1_value.getString("number");
JSONArray detail_value = students_c1_value.getJSONArray("detail");
/* 处理detail数组中的元素 */
String c1_detail_name_value = "";
String c1_detail_age_value = "";
ArrayList<String> c1_detail_list = new ArrayList<String>();
for(int i=0;i<detail_value.length();i++){
JSONObject detail_value_item = detail_value.getJSONObject(i);
c1_detail_name_value = detail_value_item.getString("name");
c1_detail_age_value = detail_value_item.getString("age");
c1_detail_list.add(c1_detail_name_value+" "+c1_detail_age_value);
}
/**********************************************************************/
/**********************************************************************/
/* key==student ,key==c2中,并且：key=class /number/detail */
String c2_class_value = students_c2_value.getString("class");
String c2_number_value = students_c2_value.getString("number");
JSONArray c2_detail_value = students_c2_value.getJSONArray("detail");
/* 处理detail数组中的元素 */
ArrayList<String> c2_detail_list = new ArrayList<String>();
for(int i=0;i<detail_value.length();i++){
JSONObject detail_value_item = detail_value.getJSONObject(i);
String c2_detail_name_value = detail_value_item.getString("name");
String c2_detail_age_value = detail_value_item.getString("age");
c2_detail_list.add(c2_detail_name_value+" "+c2_detail_age_value);
}
/**********************************************************************/
/* 输出信息 */
for(int i=0;i<c1_detail_list.size();i++){
Toast.makeText(MainActivity.this, c1_class_value+"\n"+c1_number_value+"\n"+c1_detail_list.get(i)+"\n"+school_value,
1000).show();
}
for(int i=0;i<c2_detail_list.size();i++){
Toast.makeText(MainActivity.this, c2_class_value+"\n"+c2_number_value+"\n"+c2_detail_list.get(i)+"\n"+school_value,
1000).show();
}
}else{
Toast.makeText(MainActivity.this, "服务器访问失败！", 1000).show();
}
}catch(Exception ex){
ex.printStackTrace();
Toast.makeText(MainActivity.this, "出现异常了！", 1000).show();
}
}
/* 将数据以JSON 的格式表示 */
protected void achieve_JSON(){
// {
// students:
// {
// c1:{class:"android1",number:37,detail:[{name:"aa",age:18},{name:"ff",age:19}]},
// c2:{class:"android2",number:38,detail:[{name:"hh",age:16}{name:"kk",age:19}]},
//
// },
// school:"国土地信学院"
// }
try{
/* 对上述的格式表示：从最小的级别进行推导 *//* 按如下导论进行格式转换设置 */
/* detail:[{name:"aa",age:18},{name:"ff",age:19}] */
JSONArray detail_jsonArr = new JSONArray();
/* 数组中的元素1 */
JSONObject detail_json_arr_item = new JSONObject();
detail_json_arr_item.put("name", "aa");
detail_json_arr_item.put("age", 18);
/* 数组中的元素2 */
JSONObject detail_json_arr_item2 = new JSONObject();
detail_json_arr_item2.put("name", "ff");
detail_json_arr_item2.put("age", 19);
detail_jsonArr.put(detail_json_arr_item);
detail_jsonArr.put(detail_json_arr_item2);
/* c1:{class:"android1",number:37,detail:[{name:"aa",age:18},{name:"ff",age:19}]} */
JSONObject c1_jsonObject = new JSONObject();
c1_jsonObject.put("class", "android1");
c1_jsonObject.put("number", 37);
c1_jsonObject.put("detail", detail_jsonArr);
/* detail:[{name:"hh",age:16},{name:"kk",age:19}] */
JSONArray c2_detail_jsonArr = new JSONArray();
/* 数组中的元素1 */
JSONObject c2_detail_json_arr_item = new JSONObject();
c2_detail_json_arr_item.put("name", "bb");
c2_detail_json_arr_item.put("age", 38);
/* 数组中的元素2 */
JSONObject c2_detail_json_arr_item2 = new JSONObject();
c2_detail_json_arr_item2.put("name", "cc");
c2_detail_json_arr_item2.put("age", 49);
/* 将元素添加到数组 */
c2_detail_jsonArr.put(c2_detail_json_arr_item);
c2_detail_jsonArr.put(c2_detail_json_arr_item2);
/* c2:{class:"android2",number:38,detail:[{name:"hh",age:16},{name:"kk",age:19}]} */
JSONObject c2_jsonObject = new JSONObject();
c2_jsonObject.put("class", "android2");
c2_jsonObject.put("number", 38);
c2_jsonObject.put("detail", c2_detail_jsonArr);
/* students:{
c1:{class:"android1",number:37,detail:[{name:"aa",age:18},{name:"ff",age:19}]},
c2:{class:"android2",number:38,detail:[{name:"hh",age:16},{name:"kk",age:19}]}} */
JSONObject students_json = new JSONObject();
students_json.put("c1", c1_jsonObject);
students_json.put("c2", c2_jsonObject);
/* 所有 */
JSONObject person = new JSONObject();
person.put("students", students_json);
person.put("school","湖北国土资源职业学院");
show.setText(person.toString());
}catch(Exception ex){
}
}
}