Spring

自定义注解使用SPEL表达式绑定动态变量参数值

1、定义注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface OperationLog {
    String module();
    String operation();
    String businessId() default "";
}

2、定义AOP

@Service
@Aspect
public class OperationLogAop {
    @After("@annotation(operationLog)")
    public void interceptOperation(JoinPoint point, OperationLog operationLog) {
        String module = operationLog.module();
        String operation = operationLog.operation();
        String businessIdSpel = operationLog.businessId();
        Object[] args = point.getArgs();
        Method method = ((MethodSignature) point.getSignature()).getMethod();
        //获取被拦截方法参数名列表(使用Spring支持类库)
        LocalVariableTableParameterNameDiscoverer localVariableTable = new LocalVariableTableParameterNameDiscoverer();
        String[] paraNameArr = localVariableTable.getParameterNames(method);
        //使用SPEL进行key的解析
        ExpressionParser parser = new SpelExpressionParser();
        //SPEL上下文
        StandardEvaluationContext context = new StandardEvaluationContext();
        //把方法参数放入SPEL上下文中
        for(int i=0;i<paraNameArr.length;i++) {
            context.setVariable(paraNameArr[i], args[i]);
        }
        String businessId = null;
        // 使用变量方式传入业务动态数据
        if(businessIdSpel.matches("^#.*.$")) {
            businessId = parser.parseExpression(businessIdSpel).getValue(context, String.class);
        }
        System.out.println(businessId);
    }
}

3、使用注解

@OperationLog(module = "role", operation = "insert", businessId = "#entity.name")
@PostMapping("/insert")
public void insert(Role entity) {

}

本文由 创作，采用 知识共享署名4.0 国际许可协议进行许可。本站文章除注明转载/出处外，均为本站原创或翻译，转载前请务必署名。最后编辑时间为: 2021/03/25 04:23