java - 如何从 Controller 发送多个数组列表到ajax成功函数

Question

我的 spring Controller 中有多个单独的 arrayList。

@RequestMapping(value = "/deleteFileFromS31")
public  @ResponseBody List<String> deleteFileFromS3(){
ArrayList<String> l1=new ArrayList<String>();
ArrayList<String> l2=new ArrayList<String>();
ArrayList<String> l3=new ArrayList<String>();   
}

我如何在ajax成功函数中获取这些单独的数组列表

Answer 1

您只需返回 List<List<String>>要获取 json 中的数组，但您没有名称，并且必须基于顺序:

@RestController
public class MyController {

    @RequestMapping(path = "/hello")
    public List<List<String>> path() {
        List<String> l1 = Arrays.asList("l11","l12","l13");
        List<String> l2 = Arrays.asList("l21","l22","l23");
        List<String> l3 = Arrays.asList("l31","l32","l33");
        return Arrays.asList(l1,l2,l3);
    }
}

Result: [["l11","l12","l13"],["l21","l22","l23"],["l31","l32","l33"]]

或者创建一个封装这些的 DTO 并直接返回它以获取包含参数名称的 json 对象:

@RestController
public class MyController {

    @RequestMapping(path = "/hello")
    public DTO path() {
        List<String> l1 = Arrays.asList("l11","l12","l13");
        List<String> l2 = Arrays.asList("l21","l22","l23");
        List<String> l3 = Arrays.asList("l31","l32","l33");
        return new DTO(l1,l2,l3);
    }

    public static class DTO {
        private final List<String> l1;
        private final List<String> l2;
        private final List<String> l3;

        public DTO(List<String> l1, List<String> l2, List<String> l3) {
            this.l1 = l1;
            this.l2 = l2;
            this.l3 = l3;
        }

        public List<String> getL1() {
            return l1;
        }

        public List<String> getL2() {
            return l2;
        }

        public List<String> getL3() {
            return l3;
        }
    }
}

Result: {"l1":["l11","l12","l13"],"l2":["l21","l22","l23"],"l3":["l31","l32","l33"]}