难以将数据从 ajax 发送到 spring mvc 控制器

Question

我的 ajax 代码如下所示：

function GetProjectlist() { 
            alert(department);
            var obj = { department : department};
            $.ajax({
                type: "POST",
                url:  "http://localhost:8080/MyApplication/getAllProjects",               
                data: JSON.stringify(obj),
                contentType: "application/json; charset=utf-8",         
                dataType: "json",
                success: OnGetProjectSuccess,
              error: OnGetProjectError
            });
           }

另一方面，我的控制器看起来像这样：

@RequestMapping(value = "/getAllProjects", method = RequestMethod.POST,headers = {"Content-type=application/json"}) 
    public @ResponseBody JsonJtableProjectListResponse getAllProjects(@RequestParam(value = "department", required = false) String department) {        

        System.out.print("department"+department);
        logger.info("Home Controller -getAllProjects");

................................................ .....

当我在控制器中打印部门时，它是空的。谁能告诉我如何将部门从 ajax 传递给控制器？

Answer 1

尝试使用@RequestBody 注释而不是@RequestParam 注释，因为您正在发送json 数据。查看这篇文章了解如何操作。

http://hmkcode.com/spring-mvc-json-json-to-java/

对于简单的参数传递，使用类似下面的内容并像之前一样在服务器端使用@RequestParam。

$.ajax({
                type: "GET",
                url:  "http://localhost:8080/MyApplication/getAllProjects",               
                data: {department:department},
                dataType: "json",
                success: OnGetProjectSuccess,
              error: OnGetProjectError
            });

难以将数据从 ajax 发送到 spring mvc 控制器

Having difficulties sending data from ajax to spring mvc controller

ajax

model-view-controller

spring