java - 使用 Jackson 解析 Json 文件

Question

我调用一个返回 Json 对象的 WS，如下所示:

   {
        "id": "salton", 
        "name": "salton", 
    }

我使用它解析没有任何问题

ObjectMapper mapper = new ObjectMapper();
return mapper.readValue(jsonStr, Show.class);

然后我有另一个返回对象列表的WS，如下

{
    "id": "saltonId", 
    "name": "salton", 
},
{
    "id": "elCordeLaCiutat", 
    "name": "elCordeLaCiutat", 
}

我想用它来解析

ObjectMapper mapper = new ObjectMapper();
return mapper.readValue(jsonStr, List<Show.class>.class);

但是我遇到了编译问题

Multiple markers at this line
    - List cannot be resolved to a variable
    - Syntax error on token ">", byte expected after this 
     token

Answer 1

对象列表应该被包裹在 [] 中，如下所示

[
    {
        "id": "saltonId", 
        "name": "salton", 
    },
    {
        "id": "elCordeLaCiutat", 
        "name": "elCordeLaCiutat", 
    }
]

你可以这样解开:

ObjectMapper mapper = new ObjectMapper();
List<Show> shows = Arrays.asList(mapper.readValue(json, Show[].class));