CODEWITHSUNDEEP
javarestspring-mvcpostput
gstackoverflow
gstackoverflow

Reputation: 37058

How to pass long to the spring PUT controller

I have controller:

@RestController
public class AdminController {

    @PutMapping("/path/max_file_size")
    public void setMaxFileSize(@ModelAttribute MaxFileSizeDto size) {
        System.out.println(size.getSize());
    }

    public static class MaxFileSizeDto {
        private long size;

        public long getSize() {
            return size;
        }

        public void setSize(long size) {
            this.size = size;
        }
    }
}

I send htpp request with postenter image description hereman:

but I always gets 0 for 

size.getSize()

what do I wrong?

Upvotes: 2

Views: 774

Answers (1)

Ataur Rahman Munna
Ataur Rahman Munna

Reputation: 3917

Before Adding model you should remember that, Model and Controller should be segregated. That means keep your model in another package or class.For posting/putting data you should use Object(String, Integer,Long) instead of primitive(int, long etc).

Suppose your Model Class

MaxFileSizeDto.java

public static class MaxFileSizeDto {
    private Long size;

    public Long getSize() {
        return size;
    }

    public void setSize(Long size) {
        this.size = size;
    }
}

And your controller class will be:

@RestController
public class AdminController {

    @PutMapping("/path/max_file_size")
    public void setMaxFileSize(@ModelAttribute MaxFileSizeDto size) {
        System.out.println(size.getSize());
    }
}

When you sent data as application/x-www-form-urlencoded then your data will be sent in this format and directly bind in @ModelAttribute defined class.

param1=data1&param2=data2&param3=data3

However postman internally send the data in this format. If you want to send data as a @RequestBody then you should use json data saying that your content type is application/json. To do that you should select raw radio button from postman and select application/json from drop down.(last element in the row) In these case data will be 

{
    "size":123456
}

Upvotes: 1

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