Article directory `defer` and exception handling Why use `defer` How to use `defer` Notes on using `defer` Precomputed parameters What are exceptions and errors How to handle exceptions and errors Considerations for handling exceptions and errors defer and exception handling In this article, we introduce the use and precautions of defer in Go language, and […]
Tag: except
Mybatis creation return object exception caused by Lombok’s @Builder annotation
Mybatis creation return object exception caused by Lombok’s @Builder annotation **Conclusion:** After using the Bbuilder annotation, a fully parameterized constructor will be produced based on the current class (excluding the attributes of the parent class). Mybaitis will cause many strange exceptions when it attributes the returned data, so it is best not to use it. […]
ResolvedFailed to start bean documentationPluginsBootstrapper; nested exception .lang.NullPointerEx
Article directory Exception information reason Solution Plan 0 plan 1 Insert image description here Exception information Failed to start bean ‘documentationPluginsBootstrapper’; nested exception is java.lang.NullPointerException 2023-11-10 11:21:44.013 ERROR 44100 — [o-8080-Acceptor] org.apache.tomcat.util.net.Acceptor : Socket accept failed java.nio.channels.AsynchronousCloseException: null at java.base/java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:202) ~[na:na] at java.base/sun.nio.ch.ServerSocketChannelImpl.end(ServerSocketChannelImpl.java:269) ~[na:na] at java.base/sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:288) ~[na:na] at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:547) ~[tomcat-embed-core-9.0.68.jar:9.0.68] at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:79) ~[tomcat-embed-core-9.0.68.jar:9.0.68] at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:129) […]
Analysis of anonymous mapping page fault exception in Linux kernel virtual memory management
Before explaining the anonymous mapping page fault exception, we must first understand what is an anonymous page? Corresponding to the anonymous page is the file page. We should understand the file page well, which is the page that maps the file, such as mapping the file to the virtual memory through mmap and then reading […]
Attack and utilization techniques of overflow vulnerabilities in exception handling – Part 1
This article focuses on the exception handling corresponding to C++ under Linux, that is, the study of attack methods for the unwind exception handling process based on eh_frame. Since there are certain differences in the exception handling process and underlying implementation in different operating systems and languages, specific issues need to be dealt with on […]
Will java try catch continue execution after exception?
1. There is a try-catch statement block, and throw is in the catch statement block. Then the subsequent code of the line of code that causes the exception (error report) in the try statement block will not be executed, and the code after the catch statement block will not be executed (in case of Except […]
Springboot integrates redis, mybatis-plus and websocket exception framework code encapsulation
In the process of software development, a well-encapsulated, concise and elegant Family Bucket framework can greatly improve the work efficiency of developers, while also reducing the complexity of the code and making it easier to maintain in the future. The source code involved in this article is at the end of the article, with a […]
OpenHarmony 4.0 Release compilation exception handling
1. Environment configuration Compilation environment: Ubuntu 20.04 OpenHarmony software version: 4.0 Release Equipment platform: rk3568 2. Drop-down code Refer to the official website for steps: OpenHarmony 4.0 Release source code acquisition repo init -u https://gitee.com/openharmony/manifest -b OpenHarmony-4.0-Release –no-repo-verify repo sync -c repo forall -c ‘git lfs pull’ 3. Compile code Refer to the official website […]
Solving errors in web projects, java.io.FileNotFoundException: druid.properties (the system cannot find the specified file); [spring factory decoupling development]
When using Tomcat9.0, spring5.0 framework original factory class decoupling, druid-1.0.9jar version, JDK9, MSQL8 version database to simulate web page login case, an error message that the druid.properties file cannot be found appears, the details are as follows [Case code posted at the end]; Normally speaking, the configuration file is placed under the src directory, and […]
Brief description of SpringBoot exception handling mechanism
SpringBoot exception handling mechanism 1. Basic introduction Spring Boot provides a powerful exception handling mechanism, allowing developers to capture and handle various exceptions that occur in applications to provide more friendly error messages or perform appropriate error handling operations. The following is a brief introduction to the Spring Boot exception handling mechanism: @ControllerAdvice: @ControllerAdvice is […]