java - Jersey 多个构造函数@inject

Question

我正在为我的 Jersey 资源创建两个构造函数，但是只有一个可以调用，

这是示例代码，

public class jerseyresoure {
    private String name;
    private int age;

    @Inject 
    public jerseyresoure (String name){
          this.name = name;
    }

    @Inject 
    public jerseyresoure (int age){
          this.age= age;
    }
}

参数为int的get构造函数是调用成功的构造函数，你能帮我解决这个问题吗？

Answer 1

根据 CDI 规范，使用 @Inject 注解多个构造函数是非法的(请参阅 CDI 规范第 3.9 节):

If a bean class does not explicitly declare a constructor using @Inject, the constructor that accepts no parameters is the bean constructor.

If a bean class has more than one constructor annotated @Inject, the container automatically detects the problem and treats it as a definition error.

A bean constructor may have any number of parameters. All parameters of a bean constructor are injection points.

所以你可以做如下:

public class jerseyresoure {
    private String name;
    private int age;

    @Inject 
    public jerseyresoure (String name, int age){
        this.name = name;
        this.age = age;
    }

}

我假设您正在使用生产者方法，以便注入(inject)值(name 和 age)。