spring boot 1.5.4 exception control
spring boot has implemented unified exception handling. Let’s take a look at how to customize exception handling
1. Error code page mapping
1.1 Static page
Must be configured in the resources/static/error folder and named after the error code
The following is the content of the 404 error page. When accessing When a link does not exist, locate this page
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Not Found</title></head><body><h1>Sorry, Not Found</h1><p>status code is 404</p></body></html>
Display effect
1.2 Dynamic Template page (the page storage location cannot be changed, and there are only two names: 4xx and 5xx)
Example (5xx.ftl)
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Error</title></head><body><h1>server error</h1><p><div style="color:red;font-size:large">error code: ${status}-${error}</div><div style="color:red;font-size:medium">error msg: ${exception!},${message!}</div><div><div id="trace" style="color:grey;font-size:small;display: none;border: 1px solid black;padding: 10px;">${trace!}</div></div></p></body></html>
Deliberately access a request that throws an exception (/test2/throwex)
@Controller
@RequestMapping("/test2")public class Test2 {
@RequestMapping("")public String index(){return "test";
}
@RequestMapping("/throwex")
@ResponseBodypublic String throwex(){int a = 3;int b=0;return String.valueOf(a/b);
}
}Page effect
If you use ajax to access this error request, the error message represented by json will be returned
Demo page (/test2 -> test.ftl)
<!DOCTYPE html><html><head><meta charset="UTF-8" /><title>test</title><script type="text/javascript" src="/js/jquery-2.0.3.min.js?1.1.11"></script></head><body><h1>test page</h1><div><button onclick="doAjax();">请求异常测试</button><div id="msg"></div><textarea id="errorMsg" style="color:red;width: 80%;height:300px"></textarea></div><script type="text/javascript">var doAjax = function () {
$.ajax({
url:'/test2/throwex',
async:true,
type:'GET',
data:{},
dataType:'json',
success:function (data) {
$('#msg').text(data);
},
error: function(xhr, textStatus, errorThrown) {// alert(XMLHttpRequest.status);// alert(XMLHttpRequest.readyState);// alert(textStatus); $('#errorMsg').text(xhr.responseText);
}
});
};</script></body></html>Visit the test page, click the button, and check the effect as follows:
Here, use the web browser and ajax to access the error interface to get different results, one output Error page, an output error Json, which is determined by the reception type of the request.
2. Customize the mapping of error codes to pages
2.1 Static page mapping configuration (control the error code mapping relationship when customizing the embedded container )
@Componentpublic class CustomizationBean implements EmbeddedServletContainerCustomizer{/** * 定制方法一：实现EmbeddedServletContainerCustomizer
* @param container */@Overridepublic void customize(ConfigurableEmbeddedServletContainer container) {//container.setPort(9000); }/** * 定制方法二：注入EmbeddedServletContainerFactory
* @return */@Beanpublic EmbeddedServletContainerFactory servletContainer() {
TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
factory.setPort(9001);
factory.setSessionTimeout(10, TimeUnit.MINUTES);//优先级高于配置在/static/error文件夹里面的404.html页面factory.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/error/403.html"));return factory;
}
}
2.2 Dynamic page mapping configuration
@Componentpublic class MyErrorViewResolver implements ErrorViewResolver {
@Overridepublic ModelAndView resolveErrorView(HttpServletRequest request, HttpStatus status, Map<String, Object> model) { return new ModelAndView("/error/error",model);}
}
This custom ViewResolver will replace the default page processor DefaultErrorViewResolver. The above configuration maps all errors (regardless of error codes) to the error page error.ftl for unified management.
New error.ftl page rendering error content
Similar configuration to 5xx.ftl
3. Some abnormal configurations
#BasicErrorController的请求路径(你可以遇到错误后跳转的路径，该路径是一个BasicErrorController的请求路径，映射到它errorHtml或者error方法，由请求接受类型决定，一个返回错误页面，一个返回错误json)
#server.error.path=/error
#always include stacktrace（是否包含异常的堆栈信息，默认NEVER，页面无法获取到${trace!}的值，可取值NEVER,ALWAYS,ON_TRACE_PARAM; on_trace_param意思是请求带上参数 ?trace=true）<em>server.error.include-stacktrace=always<br><br><br></em>
4.springboot exception handling process
controller->Error jump->BasicErrorController->Call errorHtml method->getErrorAttributes (get error attributes and return model)->Throw to the page Processor ErrorViewResolver
So you can customize controller/customize##ErrorAttributes/customizeErrorViewResolver etc., implement More complex exception handling
The above is the detailed content of spring boot 1.5.4 exception control. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1666
14
1425
52
1323
25
1272
29
1251
24
![Windows ISO file too large BootCamp error [Fixed]](https://img.php.cn/upload/article/000/887/227/170831702395455.jpg?x-oss-process=image/resize,m_fill,h_207,w_330)
Windows ISO file too large BootCamp error [Fixed]
Feb 19, 2024 pm 12:30 PM
If you get the error message "The Windows ISO file is too large" when using BootCampAssistant on a Mac computer, this may be because the ISO file size exceeds the limit supported by BootCampAssistant. The solution to this problem is to use other tools to compress the ISO file size to ensure that it can be processed in BootCamp Assistant. BootCampAssistant is a convenient tool provided by Apple for installing and running Windows operating system on Mac computers. It helps users set up a dual-boot system, allowing them to easily choose to use MacOS or Wind at startup
A new programming paradigm, when Spring Boot meets OpenAI
Feb 01, 2024 pm 09:18 PM
In 2023, AI technology has become a hot topic and has a huge impact on various industries, especially in the programming field. People are increasingly aware of the importance of AI technology, and the Spring community is no exception. With the continuous advancement of GenAI (General Artificial Intelligence) technology, it has become crucial and urgent to simplify the creation of applications with AI functions. Against this background, "SpringAI" emerged, aiming to simplify the process of developing AI functional applications, making it simple and intuitive and avoiding unnecessary complexity. Through "SpringAI", developers can more easily build applications with AI functions, making them easier to use and operate.
Use Spring Boot and Spring AI to build generative artificial intelligence applications
Apr 28, 2024 am 11:46 AM
As an industry leader, Spring+AI provides leading solutions for various industries through its powerful, flexible API and advanced functions. In this topic, we will delve into the application examples of Spring+AI in various fields. Each case will show how Spring+AI meets specific needs, achieves goals, and extends these LESSONSLEARNED to a wider range of applications. I hope this topic can inspire you to understand and utilize the infinite possibilities of Spring+AI more deeply. The Spring framework has a history of more than 20 years in the field of software development, and it has been 10 years since the Spring Boot 1.0 version was released. Now, no one can dispute that Spring
What are the implementation methods of spring programmatic transactions?
Jan 08, 2024 am 10:23 AM
How to implement spring programmatic transactions: 1. Use TransactionTemplate; 2. Use TransactionCallback and TransactionCallbackWithoutResult; 3. Use Transactional annotations; 4. Use TransactionTemplate in combination with @Transactional; 5. Customize the transaction manager.
A guide to the unusual missions in the Rise of Ronin Pool
Mar 26, 2024 pm 08:06 PM
The abnormality in the pool is a side task in the game. Many players want to know how to complete the abnormality in the pool task. It is actually very simple. First, we must master the technique of shooting in the water before we can accept the task and investigate the source of the stench. Later, we discovered It turns out that there are a lot of corpses under the pool. Let’s take a look at this graphic guide for the unusual tasks in the pool in Rise of Ronin. Guide to unusual missions in the Ronin Rise Pool: 1. Talk to Iizuka and learn the technique of shooting in the water. 2. Go to the location in the picture below to receive the abnormal task in the pool. 3. Go to the mission location and talk to the NPC, and learn that there is a foul smell in the nearby pool. 4. Go to the pool to investigate. 5. Swim to the location in the picture below, dive underwater, and you will find a lot of corpses. 6. Use a camera to take pictures of the corpse. 7
Practical tips for efficiently solving Java large file reading exceptions
Feb 21, 2024 am 10:54 AM
Practical tips for efficiently resolving large file read exceptions in Java require specific code examples. Overview: When processing large files, Java may face problems such as memory overflow and performance degradation. This article will introduce several practical techniques to effectively solve Java large file reading exceptions, and provide specific code examples. Background: When processing large files, we may need to read the file contents into memory for processing, such as searching, analyzing, extracting and other operations. However, when the file is large, the following problems are often encountered: Memory overflow: trying to copy the entire file at once
MIT's latest masterpiece: using GPT-3.5 to solve the problem of time series anomaly detection
Jun 08, 2024 pm 06:09 PM
Today I would like to introduce to you an article published by MIT last week, using GPT-3.5-turbo to solve the problem of time series anomaly detection, and initially verifying the effectiveness of LLM in time series anomaly detection. There is no finetune in the whole process, and GPT-3.5-turbo is used directly for anomaly detection. The core of this article is how to convert time series into input that can be recognized by GPT-3.5-turbo, and how to design prompts or pipelines to let LLM solve the anomaly detection task. Let me introduce this work to you in detail. Image paper title: Largelanguagemodelscanbezero-shotanomalydete
C++ function exceptions and single testing: ensuring code soundness
May 03, 2024 am 09:18 AM
Exception handling and unit testing are important practices to ensure the soundness of C++ code. Exceptions are handled through try-catch blocks, and when the code throws an exception, it jumps to the catch block. Unit testing isolates code testing to verify that exception handling works as expected under different circumstances. Practical case: The sumArray function calculates the sum of array elements and throws an exception to handle an empty input array. Unit testing verifies the expected behavior of a function under abnormal circumstances, such as throwing an std::invalid_argument exception when an array is empty. Conclusion: By leveraging exception handling and unit testing, we can handle exceptions, prevent code from crashing, and ensure that the code behaves as expected under abnormal conditions.
