如何在 java 中将字符串转换为泛型

Question

我有一个 class 与此类似：

public class Car<T> {
   private T model;
   private CarBodyParts body;
}

public class CarBodyParts {
   private Integer carWidth;
   private Integer carHeight;
}

public class Jaguar {
   private String name;
   private Integer wheelsCount;
}

String val = "{ "model": { "name": "Jaguar", "wheelsCount": 4 }, "body": { "carWidth": 100, "carHeight": 20 } }" =15=]

如何将此字符串 val 转换为 Car<Jaguar> 对象？

Answer 1

您可以使用 Jackson 库将字符串转换为 class。将以下依赖项添加到您的项目

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.13.2.2</version>
</dependency>

使用下面的代码将字符串转换为 Car:

ObjectMapper objectMapper = new ObjectMapper();
String str = "{ \"model\": { \"name\": \"Jaguar\", \"wheelsCount\": 4 }, \"body\": { \"carWidth\": 100, \"carHeight\": 20 } }";
Car<Jaguar> car1 = objectMapper.readValue(str,Car.class);

从 here

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