Question

我想创建一个Restful网络服务，它将生成JSON输出... 因为它应该包含一些像下面这样的图像URL以及json数组和json对象的数量，..

    { 
    "worldpopulation": 
    [
         {
         "rank":1,"country":"China",
         "population":"1,354,040,000",
         "flag":"http://www.androidbegin.com/tutorial/flag/china.png"
         }, 

         {
         "rank":2,"country":"India",
         "population":"1,210,193,422",
         "flag":"http://www.androidbegin.com/tutorial/flag/india.png"
         }, 

         {
         "rank":3,"country":"United States",
         "population":"315,761,000",
         "flag":"http://www.androidbegin.com/tutorial/flag/unitedstates.png"
         }

    ] 
    }

所以我以后可以在移动设备上使用它，......

Answer 1

您的Google是否已关闭!!! Google提供了许多与REST网络服务相关的好东西。

无论如何看看这个东西

<强> Building a Simple RESTful Web Service to produce JSON using Jersey

<强> Developing REST Web Services in Eclipse

要创建JSON，请参阅此示例
假设您要创建一个JSON，如下所示

 { 
    "worldpopulation": 
    [
         {
         "rank":1,"country":"China",
         "population":"1,354,040,000",
         "flag":"http://www.androidbegin.com/tutorial/flag/china.png"
         }, 

         {
         "rank":2,"country":"India",
         "population":"1,210,193,422",
         "flag":"http://www.androidbegin.com/tutorial/flag/india.png"
         }, 

         {
         "rank":3,"country":"United States",
         "population":"315,761,000",
         "flag":"http://www.androidbegin.com/tutorial/flag/unitedstates.png"
         }

    ] 
 }

用于创建上述JSON的java代码如下所示

JSONObject jsonobj=new JSONObject();
JSONArray obj = new JSONArray();
HashMap rows=new HashMap();
rows.put("rank","1");
rows.put("country","China");
rows.put("population","1,354,040,000");
rows.put("flag","http://www.androidbegin.com/tutorial/flag/china.png");
obj.put(rows);

rows=new HashMap();
rows.put("rank","2");
rows.put("country","India");
rows.put("population","1,210,193,422");
rows.put("flag","http://www.androidbegin.com/tutorial/flag/india.png");
obj.put(rows);

rows=new HashMap();
rows.put("rank","3");
rows.put("country","United States");
rows.put("population","315,761,000");
rows.put("flag","http://www.androidbegin.com/tutorial/flag/unitedstates.png");

jsonobj.put("worldpopulation", obj);

System.out.println(jsonobj.toString());

Answer 2

你可以做的第一件快速的事情就是为了一个tomcat“你好世界”而谷歌，并改变它以将你的json作为一个硬编码的字符串返回。

我的第一个google结果是此链接http://www-inf.it-sudparis.eu/~nguyen_n/teaching_assistant/servlet-jsp/helloworld-tomcat

在那里你可以改变像：

这样的行

out.println("<HTML>");

就像

out.println("{ 
                \"worldpopulation\": 
                [
                 {\"
            ....");

如何使用java tomcat创建Restful服务

2 个答案: