Json 解析无法反序列化 api 调用

Question

我正在尝试将 json 发送到我的 api，在多次尝试其他解决方案之后，我真的陷入困境，再也找不到任何解决方案了。我通过以下函数收到了一个电话留言

@PostMapping(path = "ts/sts")
    public void saveTestStep(@RequestBody TestStepDTO testStepDTO){
        TestStep testStep = new TestStep(testStepDTO.getTestCaseId(),
                testStepDTO.getStepNumber(),
                testStepDTO.getDescription(),
                testStepDTO.getTestdata(),
                testStepDTO.getPrerequisite(),
                testStepDTO.getResult());
        TestStepService testStepService = new TestStepService();
        testStepService.save(testStep);
    }

我用下面的 javascript 脚本调用它

for(i=0;i<prerquisites.length;i++){

                        b = i+1;
                        $.ajax({
                            url: 'http://localhost:8080/ts/sts',
                            dataType: 'json',
                            type: 'post',
                            contentType: 'application/json',
                            data: [{ "result": result[i], "stepNumber": b, "description":  description[i],"testCaseId": 1 , "testdata": testdata[i], "prerequisite": prerquisites[i]}] ,
                            processData: false,
                            success: function( data, textStatus, jQxhr ){
                                $('#response pre').html( JSON.stringify( data ) );
                            },
                            error: function( jqXhr, textStatus, errorThrown ){
                                console.log( errorThrown );
                                console.log("testcaseid: " + testcaseid);
                            }
                        });
                    }

我有我的 DTO 课程

public class TestStepDTO {

    @NotBlank
    private Integer testCaseId;
    @NotBlank
    private Integer stepNumber;
    @NotBlank
    private String description;
    @NotBlank
    private String result;
    @NotBlank
    private String testdata;
    @NotBlank
    private String prerequisite;

    public Integer getTestCaseId() {
        return testCaseId;
    }

    public void setTestCaseId(Integer testCaseId) {
        this.testCaseId = testCaseId;
    }

    public Integer getStepNumber() {
        return stepNumber;
    }

    public void setStepNumber(Integer stepNumber) {
        this.stepNumber = stepNumber;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getResult() {
        return result;
    }

    public void setResult(String result) {
        this.result = result;
    }

    public String getTestdata() {
        return testdata;
    }

    public void setTestdata(String testdata) {
        this.testdata = testdata;
    }

    public String getPrerequisite() {
        return prerequisite;
    }

    public void setPrerequisite(String prerequisite) {
        this.prerequisite = prerequisite;
    }
}

但是当我运行它时，我得到以下错误

2021-04-01 18:49:06.043  WARN 28296 --- [io-8080-exec-10] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of `be.
tquality.TestManager.RestService.POJO.TestStepDTO` out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `be.tquality.TestManager.RestService.POJO.T
estStepDTO` out of START_ARRAY token

有人知道或看到我在这个过程中做错了什么吗？

Answer 1

删除 ajax post call 中数据行上的方括号。

data: [{ "result": result[i]... }] 

应该是

data: { "result": result[i] ... }

这会将 json 作为数组发送到 API，因为方括号 [] 是数组表示法，大括号 {} 对象表示法周围。