json数据怎么写_育才学习网

1. 安卓json注册怎么写(怎么获取安卓apk请求的json地址)

安卓json注册怎么写(怎么获取安卓apk请求的json地址)

1.怎么获取安卓apk请求的json地址

HttpClient client = new HttpClient();

PostMethod post = new PostMethod("your url");

//准备参数，可以是多个

NameValuePair simcard = new NameValuePair("key","value");

post.setRequestBody(new NameValuePair[]{simcard});

//执行请求

client.executeMethod(method);

//获取返回值

String response = new String(method.().getBytes("iso-8859-1"));

//把json字符串转换为对象，有很多方法

SONObject result = new JSONObject(response);

2.android 在服务器端生成json格式数据,在客户端怎么解析

因为这次要从服务器端得到Json数据，并且通过解析之后把解析后的数据显示在Android客户端中，首先部署服务器端代码（直接使用Jsp/Servlet）：构造的Json数据如下：[{"name"："张三"，"address"："北京"，"age":20},{"name"："李四"，"address"："上海"，"age":30},{"name"："王五"，"address"："深圳"，"age":35}] [一]服务器端（Person.java省略）： ①：数据构造JsonService.java public class JsonService { public static List getListPerson() { List mLists = new ArrayList(); mLists.add(new Person（"张三"， "北京"， 20）); mLists.add(new Person（"李四"， "上海"， 30）); mLists.add(new Person（"王五"， "深圳"， 35）); return mLists； } ②：Servlet的代码（包括构造Json数据，没有使用Json数据转换方法）JsonServlet.java public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); response.setCharacterEncoding("UTF-8"); PrintWriter out = response.getWriter(); List persons = JsonService.getListPerson(); StringBuffer sb = new StringBuffer(); sb.append('['); for (Person person : persons) { sb.append('{').append("\"name\":").append("\""+person.getName()+"\"").append(","); sb.append("\"address\":").append("\""+person.getAddress()+"\"").append(","); sb.append("\"age\":").append(person.getAge()); sb.append('}').append(","); } sb.deleteCharAt(sb.length() - 1); sb.append(']'); out.write(new String(sb)); out.flush(); out.close（)； } ③：部署到Tomact 浏览器输入http://localhost/JsonWeb/JsonServlet直接访问结果如下：[{"name"："张三"，"address"："北京"，"age":20},{"name"："李四"，"address"："上海"，"age":30},{"name"："王五"，"address"："深圳"，"age":35}] 至此服务器端代码编码完成，下面进行客户端代码编写；（二）客户端（Person类，和展示数据的布局文件因为简单省去） ①：获取服务器端的Json数据并且解析的工具类JsonParse.java 必要的需要导入的包省去 public class JsonParse { /** * 解析Json数据 * * @param urlPath * @return mlists * @throws Exception */ public static List getListPerson(String urlPath) throws Exception { List mlists = new ArrayList(); byte[] data = readParse(urlPath); JSONArray array = new JSONArray(new String(data)); for (int i = 0; i < array.length(); i++) { JSONObject item = array.getJSONObject(i); String name = item.getString("name"); String address = item.getString("address"); int age = item.getInt("age"); mlists.add(new Person(name, address, age)); } return mlists； } /** * 从指定的url中获取字节数组 * * @param urlPath * @return 字节数组 * @throws Exception */ public static byte[] readParse(String urlPath) throws Exception { ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] data = new byte[1024]; int len = 0; URL url = new URL(urlPath); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); InputStream inStream = conn.getInputStream(); while ((len = inStream.read(data)) != -1) { outStream.write(data, 0, len); } inStream.close(); return outStream.toByteArray（)； } } ②：主Activity类 public class MainActivity extends Activity { private Button mButton; private ListView mListView； //使用IP不能使用localhost或者127.0.0.1，因为android模拟器默认绑定这个IP，这里应该访问局域网IP private static final String urlPath = "http://10.16.31.207/JsonWeb/JsonServlet"; private static final String TAG = "MainActivity"; private List persons; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mButton = (Button) findViewById(R.id.button1); mListView = (ListView) findViewById(R.id.listView1); mButton.setOnClickListener(new MyOnClickListener()); } private class MyOnClickListener implements OnClickListener { @Override public void onClick(View v) { try { // 得到Json解析成功之后数据 persons = JsonParse.getListPerson(urlPath); List> data = new ArrayList>(); for (int i = 0; i < persons.size(); i++) { HashMap map = new HashMap(); map.put("name", persons.get(i).getName()); map.put("address", persons.get(i).getAddress()); map.put("age", persons.get(i).getAge()); data.add(map)； } //初始化适配器，并且绑定数据 SimpleAdapter _Adapter = new SimpleAdapter(MainActivity.this, data, R.layout.listview_item, new String[] { "name", "address", "age" }, new int[] { R.id。