如何使用 Jackson 将 JSON 字符串解析为数组 [英] How to parse a JSON string to an array using Jackson

问题描述

我有一个具有以下值的 String:

<预><代码>[{"key1": "value11",key2":value12"},{"key1": "value21",key2":value22"}]

还有以下类:

public class SomeClass {私人字符串key1；私人字符串key2；/* ... 省略了 getter 和 setter ...*/}

我想将其解析为 List 或 SomeClass[]

使用 Jackson ObjectMapper 最简单的方法是什么?

解决方案

我终于明白了:

ObjectMapper objectMapper = new ObjectMapper();TypeFactory typeFactory = objectMapper.getTypeFactory();列表someClassList = objectMapper.readValue(jsonString, typeFactory.constructCollectionType(List.class, SomeClass.class));

I have a String with the following value:

[
  {
    "key1": "value11",
    "key2": "value12"
  },
  {
    "key1": "value21",
    "key2": "value22"
  }
]

And the following class:

public class SomeClass {
    private String key1;
    private String key2;
    /* ... getters and setters omitted ...*/
}

And I want to parse it to a List<SomeClass> or a SomeClass[]

Which is the simplest way to do it using Jackson ObjectMapper?

解决方案

I finally got it:

ObjectMapper objectMapper = new ObjectMapper();
TypeFactory typeFactory = objectMapper.getTypeFactory();
List<SomeClass> someClassList = objectMapper.readValue(jsonString, typeFactory.constructCollectionType(List.class, SomeClass.class));

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