json - 将复杂的 JSON 字符串映射到 POJO 类

Question

我想自动将以下 JSON 结构映射到 POJO 类:

{
    "fieldClass": 
    {
        "a": 1,
        "b": "b",
        "c": "c",
        "d": "d",
        "e": "e"
    }
}

我添加了参数以将 JSON 映射到 POJO 类到 web.xml。我还尝试定义两个类，一个用于包装类，一个用于内部类。但是当我尝试使用某种方法时抛出以下异常:

SEVERE: Servlet.service() for servlet [Jersey REST Service] in context with path [/projectName] threw exception [org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "fieldClass" (Class className), not marked as ignorable at [Source: org.apache.catalina.connector.CoyoteInputStream@4d5d6704; line: 1, column: 10] (through reference chain: className["fieldClass"])] with root cause

我可以自动将其映射到 Java 类吗？

Answer 1

看看这个部分:JSON.org Java section

还有 jackson Quickstart guide