使用 Jackson 解析 Json 文件
Parsing Json file with Jackson
我将 return 的 WS 称为 Json 对象,如下所示:
{
"id": "salton",
"name": "salton",
}
我使用
解析没有任何问题
ObjectMapper mapper = new ObjectMapper();
return mapper.readValue(jsonStr, Show.class);
那我还有一个WS就是return一个对象列表,如下
{
"id": "saltonId",
"name": "salton",
},
{
"id": "elCordeLaCiutat",
"name": "elCordeLaCiutat",
}
我想用
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
Type listType = new TypeToken<List<Show>>() {}.getType();
return mapper.readValue(jsonStr, listType.class);
对象列表应按如下方式包装在 []
中
[
{
"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));
我将 return 的 WS 称为 Json 对象,如下所示:
{
"id": "salton",
"name": "salton",
}
我使用
解析没有任何问题ObjectMapper mapper = new ObjectMapper();
return mapper.readValue(jsonStr, Show.class);
那我还有一个WS就是return一个对象列表,如下
{
"id": "saltonId",
"name": "salton",
},
{
"id": "elCordeLaCiutat",
"name": "elCordeLaCiutat",
}
我想用
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
Type listType = new TypeToken<List<Show>>() {}.getType();
return mapper.readValue(jsonStr, listType.class);
对象列表应按如下方式包装在 []
中
[
{
"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));