Jersey 2.0与Json之间的HashMap转换

Question

{   ... 
    "metadata": {
        "name": "test_server",
        "server_type": "test",
         ...
    },
     ...
}

public class Server 
    {
      ...

      private Map<String, String> metadata = new HashMap<String, String>();
      ...
      public Server(){}
    }

{
    "metadata": {
        "entry":[]
    }
}

Answer 1

我已经测试了您提供的JSON字符串，它使用TypeReference和ObjectMapper运行，它们根据这个JSON字符串返回Map > 。

代码如下：

String jsonString = "{\"metadata\": {\"name\": \"test_server\",\"server_type\": \"test\"}}";

TypeReference<Map<String, Map<String, String>>> typeRef = 
                        new TypeReference<Map<String, Map<String, String>>>() {};
ObjectMapper mapper = new ObjectMapper();
try {
    Map<String, Map<String, String>> jsonObject = 
                                       mapper.readValue(jsonString, typeRef);
    System.out.println(jsonObject.get("metadata"));
} catch (Exception e) {
    System.out.println("Three might be some issue wiht the JSON string");
}

输出：

{name=test_server, server_type=test}