java - 如何通过自己的REST服务传递API异常输出？

Question

摘要:我想使用我自己的 Rest 服务将一个 REST 服务端点给出的有效异常输出传递给最终用户。

我所做的是，我使用 RestTemplate 类在服务类中调用该服务，它在有效的发布请求上提供有效的输出。但是，当我向它传递无效输入时，我在调用该 API 的服务类中仅得到“400 BAD REQUEST”结果。但是，当我使用 postman 单独调用该 API 时，我得到了预期的输出。

代码示例:

class Abc {
    ResponseEntity<String> = response;
    static final String url = "https://abc-xyz.com/client-rest-end-point-url";
    public ResponseEntity getDetails(RequestInput requestInput) {

        try{
            response=restTemplate.postForObject(url,requestInput,String.class);
        } catch(Exception e) {
            ResponseEntity response = (ResponseEntity<ErrorModel>)restTemplate.postForEntity(url,requestInput,ErrorModel.class);
        }//try-catch
    }//getDetails method
}//class

Answer 1

您可以为整个应用程序创建自定义异常类，并且可以使用 throw 关键字以 JSON 格式发送数据假设您的异常类是:

public class TestException extends Exception {

private static final long serialVersionUID = 1L;
private String code;
private String detailMessage;

public TestException() {
};

public TestException(String message, String code, String detailMessage) {
    super(message);
    this.code = code;
    this.detailMessage = detailMessage;
}

public TestException(String message, String code) {
    super(message);
    this.code = code;
}
//TestExceptionResponseCode is another class for message data, if required.
public TestException(TestExceptionResponseCode testExceptionResponseCode) {
    super(testExceptionResponseCode.getMessage());
    this.code = testExceptionResponseCode.getCode();
}

public String getCode() {
    return code;
}

public void setCode(String code) {
    this.code = code;
}

public String getDetailMessage() {
    return detailMessage;
}

public void setDetailMessage(String detailMessage) {
    this.detailMessage = detailMessage;
}

}

现在在你的情况下抛出异常可以是这样的:

class Abc {
ResponseEntity<String> = response;
static final String url = "https://abc-xyz.com/client-rest-end-point-url";
public ResponseEntity getDetails(RequestInput requestInput) {
       if(requestInput==null){
          throw new TestException("FAILED", "1", "Data can't be null");
    }

}