spring - Spring EL（SpEL）替换属性文件中的占位符？(Spring EL (SpEL) to replace placeholders from properties file?)

Question

I am using Spring Boot and SpEL (Expression Language) .

(我正在使用Spring Boot and SpEL (Expression Language) 。)

I am want to create placeholder in message.properties file so that value can be replace and send to UI.

(我想在message.properties文件中创建占位符 ，以便可以替换值并将其发送到UI。)

message.properties

(message.properties)

not.found={0} not found

Code:

(码：)

@Override
@Transactional
public void deleteEmployee(String employeeId) {
    int deletedCnt = employeeRepository.deleteEmployee(Integer.valueOf(employeeId));
    if(deletedCnt == 0 )
        throw new ResourceNotFoundException(env.getProperty("not.found"));
}

Here I want to show EmployeeId (Say 123) is not found.

(在这里我想显示找不到EmployeeId（说123）。)

  ask by PAA translate from so

Answer 1

The value located under your not.found property is nothing more than String , so you can perform any operations on that String.

(位于not.found属性下的值not.found是String ，因此您可以对该String执行任何操作。)

Eg.

(例如。)

not.found = Employee with id %s not found

And process this message in your service however you desire.

(并根据需要在您的服务中处理此消息。)

throw new ResourceNotFoundException(String.format(env.getProperty("not.found"), employeeId));

Moreover you can access other properties and environment variables in your config.

(此外，您可以在配置中访问其他属性和环境变量。)

default.message = Exception occurred:
not.found = ${default.message} ${ENVIRONMENT_VARIABLE}