错误:缺少必需的请求正文

Question

我正在尝试弹簧框架.我有RestController和函数:

@RequestMapping(value="/changePass", method=RequestMethod.POST)
    public Message changePassword(@RequestBody String id, @RequestBody String oldPass, 
                                                        @RequestBody String newPass){
        int index = Integer.parseInt(id);
        System.out.println(id+" "+oldPass+" "+newPass);
        return userService.changePassword(index, oldPass, newPass);
    }

和代码angularJS

$scope.changePass = function(){//changePass
        $scope.data = {
            id: $scope.userId,
            oldPass:$scope.currentPassword,
            newPass:$scope.newPassword
        }
        $http.post("http://localhost:8080/user/changePass/", $scope.data).
            success(function(data, status, headers, config){
                if(date.state){
                    $scope.msg="Change password seccussful!";
                } else {
                    $scope.msg=date.msg;
                }
        })
        .error(function(data, status, headers, config){
            $scope.msg="TOO FAIL";
        });
    }

当我运行它.

错误信息 :

Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public com.csc.mfs.messages.Message com.csc.mfs.controller.UserController.changePassword(java.lang.String,java.lang.String,java.lang.String)

帮我解决一下,请...

Answer 1

问题出在此代码中.

@RequestBody String id, @RequestBody String oldPass, 
                                                        @RequestBody String newPass

您不能@RequestBody在同一方法中使用多个,因为它只能绑定到单个对象(正文只能被使用一次).

方法1:

对该问题的补救措施创建了一个捕获所有相关数据的对象,而不是创建参数中的对象.

一种方法是将它们全部嵌入到单个JSON中,如下所示

{id:"123", oldPass:"abc", newPass:"xyz"}

并将您的控制器作为单个参数,如下所示

 public Message changePassword(@RequestBody String jsonStr){

        JSONObject jObject = new JSONObject(jsonStr);
.......
 }

方法2:

为您创建自己的自定义实现 ArgumentResolver