解析 JSON 为对象 JAVA，无需 Root

Question

我的服务 ALFRESCO REST 的响应是：

[
{
"role": "SiteManager",
"authority":
{
    "authorityType": "USER",
    "fullName": "admin",
    "userName": "admin",
    "firstName": "Administrator",
    "lastName": "",
    "url": "\/alfresco\/service\/api\/people\/admin"
},
"url": "\/alfresco\/service\/api\/sites\/test3\/memberships\/admin"
}
,
{
"role": "SiteConsumer",
"authority":
{
    "authorityType": "GROUP",
    "shortName": "jamalgg",
    "fullName": "GROUP_jamalgg",
    "displayName": "jamalgg",
    "url": "\/alfresco\/service\/api\/groups\/jamalgg"
},
"url": "\/alfresco\/service\/api\/sites\/test3\/memberships\/GROUP_jamalgg"
}
,
{
"role": "SiteManager",
"authority":
{
    "authorityType": "GROUP",
    "shortName": "ALFRESCO_ADMINISTRATORS",
    "fullName": "GROUP_ALFRESCO_ADMINISTRATORS",
    "displayName": "ALFRESCO_ADMINISTRATORS",
    "url": "\/alfresco\/service\/api\/groups\/ALFRESCO_ADMINISTRATORS"
},
"url": "\/alfresco\/service\/api\/sites\/test3\/memberships\/GROUP_ALFRESCO_ADMINISTRATORS"
}
]

我想解析对象列表：

List<Memberships > listMemberships;

public class Memberships {
private String role;
private List<Authority> listAuthority ;
private String url;
}
public class Authority {
private String  authorityType;
private String  shortName;
private String  fullName;
private String  displayName;
private String  url;
}

我认为有两种解决方案：

1. 如何将标签 Memberships 添加到 JSON 结果用于封装 整体。
2. 如何将 JSON 结果直接解析到我的列表

谢谢

Answer 1

正如 a-better-java-json-library 中的回答，我会使用 google-gson 库。

Answer 2

谢谢奥佐利。我的问题的答案是：

Type targetType = new TypeToken<Collection<Memberships>>() {}.getType();
List<Memberships> list = (List<Memberships>)  new Gson().fromJson(renduJson,targetType);

Answer 3

您还可以使用 http://jsongen.byingtondesign.com/ 从 json 响应生成 java 代码，然后使用jackson 库 ( http://jackson.codehaus.org/ ) 将该响应数据绑定到您的对象）：

ObjectMapper mapper = new ObjectMapper();
User user = mapper.readValue(new File("c:\\user.json"), User.class);

Answer 4

抱歉没有格式化代码

Type targetType = new TypeToken<Collection<Memberships>>() {}.getType();
List<Memberships> list = (List<Memberships>)new Gson().fromJson(rendu,targetType);