Question

我的弹簧控制器中有多个单独的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成功函数中获得这些个体arraylist

Answer 1

您只需返回List<List<String>>即可在json中获取数组，但您不会拥有这些名称，并且您必须基于该顺序：

@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);
    }
}

结果：[[＆＃34; l11＆＃34;，＆＃34; l12＆＃34;，＆＃34; l13＆＃34;]，[＆＃34; l21＆＃34;，＆＃34; l22＆＃34;＆＃34; L23＆＃34;]，[＆＃34; L31＆＃34;＆＃34; L32＆＃34;＆＃34; L33＆＃34;]]

或者创建一个封装这些的DTO并直接返回它以获取包含param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;
        }
    }
}

结果： {＆＃34; LI＆＃34;：[＆＃34; L11＆＃34;＆＃34; L12＆＃34;＆＃34; L13＆＃34]，＆＃34; L2＆＃34;：[＆＃34; L21＆＃34;＆＃34; L22＆＃34;＆＃34; L23＆＃34]，＆＃34; L3＆＃34;：[＆＃34; L31＆＃34;＆＃34; L32＆＃34;＆＃34; L33＆＃34;]}

Answer 2

您可以创建一个类并将ArrayLists放在其中，而不是在控制器中返回此类。

public class ClassName {
   List<String> l1 = new ArrayList<>();
   List<String> l2 = new ArrayList<>();
   List<String> l3 = new ArrayList<>();

   // Getters and Setters
}



public @ResponseBody ClassName deleteFileFromS3(){ 
    ClassName lists = new ClassName();
    // set lists
    return lists;
}

如何从控制器向ajax成功函数发送多个arraylist

2 个答案: