英文:
Format specifiers should be used instead of string concatenation in java
问题
我正在编写下面的代码：
Logger.error("文件 x 中出错：" + e.getMessage());
但是对于上面的代码行，我收到了一个错误，建议使用格式说明符而不是字符串连接。我应该如何修复它？
英文:
I am writing code the below code
Logger.error("Error in x file :",+ e.getMessage());
But for the above line of code I am getting the error to use format specifiers instead of string concatenation. How should I fix it?
答案1
得分: 1
private static final Logger logger = LoggerFactory.getLogger(YourClassName.class);
and try this:
logger.error("Error in x file {}", e.getMessage());
Logging this way, you avoid performance overhead for strings concatenation.
More about spring-boot logging configuration Zero Configuration Logging
英文:
Add to your class:
private static final Logger logger = LoggerFactory.getLogger(YourClassName.class);
and try this:
logger.error("Error in x file {}", e.getMessage());
Logging this way, you avoid performance overhead for strings concatenation.
More about spring-boot logging configuration Zero Configuration Logging
答案2
得分: -1
请参考以下翻译：
"Instead of concatenating the string with + (in "Error in x file :",+ e.getMessage()), you can use String.format to build the string instead:
Logger.error(String.format("Error in x file :%s", e.getMessage()));
Documentation on how Java String formatting works can be found here."
英文:
Instead of concatenating the string with + (in "Error in x file :",+ e.getMessage()), you can use String.format to build the string instead:
Logger.error(String.format("Error in x file :%s", e.getMessage()));
Documentation on how Java String formatting works can be found here.
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