我可以在此代码中使用什么来代替 try-catch 异常处理

Question

我可以在此代码中使用什么来代替 try-catch 异常处理？我尝试使用 Java throws 关键字来声明异常而不是 try-catch 异常处理，但它没有在测试用例中传递。还有其他方法可以处理这里的异常吗？我试图删除一些重复的代码，我用 *** 标记了重复的代码（我在 8 个方法中有相同的代码），但是如果我创建一个方法，它正在使用它自己的 try 块中的 class 对象并在那里使用 try catch 块然后我必须传递的参数仍在 try 块中，在最后一行我评论说 out

AjaxResponseBean moveControl(@PathVariable Integer formId, @RequestBody AjaxRequestBean request) {
        try {
            Form form = formService.getFormWithDraft(formId);
            FormDraftData draft = formService.getFormWithDraft(formId).getDraft();

            String formXml = draft.getData();
            String id = request.getData().getControls().get(0).getId();
            String beforeId = request.getData().getControls().get(0).getBeforeId();

            JAXBContext jaxbControlContext = JAXBContext.newInstance(XmlFormBean.class);
            Unmarshaller jaxbControlUnmarshaller = jaxbControlContext.createUnmarshaller();
            XmlFormBean xmlFormBean = (XmlFormBean) jaxbControlUnmarshaller.unmarshal(new StringReader(formXml));

            XmlFormBean.Control xmlControl = new XmlFormBean.Control(id);
            for (XmlFormBean.Control c : xmlFormBean.getControls()) {
                if (c.getId().equalsIgnoreCase(id)) {
                    xmlControl = c;
                    break;
                }
            }

            xmlFormBean.getControls().remove(xmlControl);
            int index = -1;
            if (StringUtils.isNotBlank(beforeId)) {
                index = xmlFormBean.getControls().indexOf(new XmlFormBean.Control(beforeId));
            }
            if (index == -1) {
                xmlFormBean.getControls().add(xmlControl);
            } else {
                xmlFormBean.getControls().add(index, xmlControl);
            }
//******************************
       Marshaller jaxbControlMarshaller = jaxbControlContext.createMarshaller();
            StringWriter writer = new StringWriter();
            jaxbControlMarshaller.marshal(xmlFormBean, writer);
            form.getDraft().setData(writer.toString());
            formService.addForm(form);

            // AjaxResponseBean
            AjaxResponseBean response = new AjaxResponseBean();
            response.setResult("success");
            response.setData(request.getData());
            return response;


        } catch (JAXBException e) {
            e.printStackTrace();
        }

        AjaxResponseBean response = new AjaxResponseBean();
        AjaxDataBean data = new AjaxDataBean();
        data.setMessage("The client request failed.");
        response.setResult("failure");
        response.setData(data);
        //return MarshallerSomething(form, jaxbControlContext, xmlFormBean, request);
        return response;
//******************************
    }
}

Answer 1

可以在params中提到JAXBContext的超类，按照方法的要求传递子类，这样即使需要不同的实现，也可以把通用的代码取出来，移到不同的方法中。

假设 Context 是 JAXBContext 的超类，而 JContext 是它的子类。

public void testMethod(Context con, String str){
//your logic here
}

Context c1 = new JAXBContext()
Context c2 = new JContext() 
testMethod(c1, "test1")
testMethod(c2, "test2")

你可以试试下面不会得到编译时异常

AjaxResponseBean moveControl(@PathVariable Integer formId, @RequestBody AjaxRequestBean request) {
        Form form = null;
        JAXBContext jaxbControlContext= null;
        XmlFormBean xmlFormBean = null;
            try {
                form = formService.getFormWithDraft(formId);
                FormDraftData draft = formService.getFormWithDraft(formId).getDraft();

                String formXml = draft.getData();
                String id = request.getData().getControls().get(0).getId();
                String beforeId = request.getData().getControls().get(0).getBeforeId();

                jaxbControlContext = JAXBContext.newInstance(XmlFormBean.class);
                Unmarshaller jaxbControlUnmarshaller = jaxbControlContext.createUnmarshaller();
                xmlFormBean = (XmlFormBean) jaxbControlUnmarshaller.unmarshal(new StringReader(formXml));

                XmlFormBean.Control xmlControl = new XmlFormBean.Control(id);
                for (XmlFormBean.Control c : xmlFormBean.getControls()) {
                    if (c.getId().equalsIgnoreCase(id)) {
                        xmlControl = c;
                        break;
                    }
                }

                xmlFormBean.getControls().remove(xmlControl);
                int index = -1;
                if (StringUtils.isNotBlank(beforeId)) {
                    index = xmlFormBean.getControls().indexOf(new XmlFormBean.Control(beforeId));
                }
                if (index == -1) {
                    xmlFormBean.getControls().add(xmlControl);
                } else {
                    xmlFormBean.getControls().add(index, xmlControl);
                }
//******************************
                Marshaller jaxbControlMarshaller = jaxbControlContext.createMarshaller();
                StringWriter writer = new StringWriter();
                jaxbControlMarshaller.marshal(xmlFormBean, writer);
                form.getDraft().setData(writer.toString());
                formService.addForm(form);

                // AjaxResponseBean
                AjaxResponseBean response = new AjaxResponseBean();
                response.setResult("success");
                response.setData(request.getData());
                return response;


            } catch (JAXBException e) {
                e.printStackTrace();
            }

            AjaxResponseBean response = new AjaxResponseBean();
            AjaxDataBean data = new AjaxDataBean();
            data.setMessage("The client request failed.");
            response.setResult("failure");
            response.setData(data);
            return MarshallerSomething(form, jaxbControlContext, xmlFormBean, request);
            //return response;
//******************************
        }

我可以在此代码中使用什么来代替 try-catch 异常处理

What Can I use In this Code Instead of try-catch exception handling

java

jaxb

jackson