What is the purpose of the @StandardException annotation in Lombok?

The @StandardException annotation in Lombok is used to automatically add standard exception handling code to generated Java classes. It will generate try-catch blocks for specified methods, containing code to handle specified types of exceptions. This helps reduce the amount of repetitive code writing, and enhances the readability and maintainability of the code.

When using the @StandardException annotation, it is necessary to specify the type of exception to handle. For example, annotating a method with @StandardException(IOException.class) will automatically generate a try-catch block in the generated class to handle IOException exceptions. Within the catch block, the stack trace information of the exception will be printed, and custom exception handling logic will be executed.

The sample code is shown as follows:

import lombok.StandardException;

public class ExampleClass {

    @StandardException(IOException.class)
    public void readFile(String fileName) throws IOException {
        // 读取文件的逻辑
    }
}

In the example above, the readFile method annotated with @StandardException(IOException.class) will automatically add a try-catch block in the generated class to handle the IOException exception. You can add custom exception handling logic in the catch block, such as logging or rolling back transactions.

In conclusion, the @StandardException annotation can help developers automatically generate standard exception handling code, improving development efficiency and code quality.