Android服务端获取json解析显示在客户端上面

Android从服务端获取json解析显示在客户端上面

首先说一下Json数据的最基本的特点,Json数据是一系列的键值对的集合,和XML数据来比,Json数据的体积更加小,传输效率高,易解析,不过可读性不高;

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 St