Spring AOP統一功能処理示例代碼

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;
@Aspect
@Component
public class UserAspect {
    // 定義切點⽅法
    @Pointcut("execution(* com.example.demo.controller.UserController.*
(..))")
    public void pointcut(){ }
    // 前置通知
    @Before("pointcut()")
    public void doBefore(){
        System.out.println("執⾏ Before ⽅法");
    }
    // 後置通知
    @After("pointcut()")
    public void doAfter(){
        System.out.println("執⾏ After ⽅法");
    }
    // return 之前通知
    @AfterReturning("pointcut()")
    public void doAfterReturning(){
        System.out.println("執⾏ AfterReturning ⽅法");
    }
    // 拋出異常之前通知
    @AfterThrowing("pointcut()")
    public void doAfterThrowing(){
        System.out.println("執⾏ doAfterThrowing ⽅法");
    }
    
    // 添加環繞通知
    @Around("pointcut()")
    public Object doAround(ProceedingJoinPoint joinPoint){
        Object obj = null;
        System.out.println("Around ⽅法開始執⾏");
        try {
            // 執⾏攔截⽅法
           obj = joinPoint.proceed();
           } catch (Throwable throwable) {
            throwable.printStackTrace();
        }
        System.out.println("Around ⽅法結束執⾏");
        return obj;
    }
}

import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, 
HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession(false);
        if (session != null && session.getAttribute("userinfo") != null) {
            return true;
        }
        response.setStatus(401);
        return false;
    }
}

@Configuration
public class AppConfig implements WebMvcConfigurer {
    // 添加攔截器
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginInterceptor())
                .addPathPatterns("/**") // 攔截所有接⼝
                .excludePathPatterns("/art/param11"); // 排除接⼝
    }
}

// 攔截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(new LoginInterceptor())
        .addPathPatterns("/**") // 攔截所有接⼝
        .excludePathPatterns("/**/*.js")
        .excludePathPatterns("/**/*.css")
        .excludePathPatterns("/**/*.jpg")
        .excludePathPatterns("/login.html")
        .excludePathPatterns("/**/login"); // 排除接⼝
}

@Configuration
public class AppConfig implements WebMvcConfigurer {
    // 所有的接⼝添加 api 前綴
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        configurer.addPathPrefix("api", c -> true);
    }
}

@Configuration
public class AppConfig implements WebMvcConfigurer {
    // 所有的接⼝添加 api 前綴
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        configurer.addPathPrefix("api", c -> true);
    }
}

import java.util.HashMap;

@ControllerAdvice
public class ErrorAdive {
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Object handler(Exception e) {
        HashMap<String, Object> map = new HashMap<>();
        map.put("success", 0);
        map.put("status", 1);
        map.put("msg", e.getMessage());
        return map;
    }
}

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.HashMap;

@ControllerAdvice
@ResponseBody
public class ExceptionAdvice {
    @ExceptionHandler(Exception.class)
    public Object exceptionAdvice(Exception e) {
        HashMap<String, Object> result = new HashMap<>();
        result.put("success", -1);
        result.put("message", "縂的異常信息：" + e.getMessage());
        result.put("data", null);
        return result;
    }
    @ExceptionHandler(NullPointerException.class)
    public Object nullPointerexceptionAdvice(NullPointerException e) {
        HashMap<String, Object> result = new HashMap<>();
        result.put("success", -1);
        result.put("message", "空指針異常：" + e.getMessage());
        result.put("data", null);
        return result;
    }
}

@RestController
@RequestMapping("/u")
public class UserController {
    @RequestMapping("/index")
    public String index() {
        Object obj = null;
        int i = obj.hashCode();
        return "Hello,User Index.";
    }
}

import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
import java.util.HashMap;
@ControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice {
    /**
     * 內容是否需要重寫（通過此⽅法可以選擇性部分控制器和⽅法進⾏重寫）
     * 返廻 true 表示重寫
     */
    @Override
    public boolean supports(MethodParameter returnType, Class 
converterType) {
        return true;
    }
    /**
     * ⽅法返廻之前調⽤此⽅法
     */
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter 
		returnType, MediaType selectedContentType, Class selectedConverterType, 
		ServerHttpRequest request, ServerHttpResponse response) {
        // 搆造統⼀返廻對象
        HashMap<String, Object> result = new HashMap<>();
        result.put("success", 1);
        result.put("message", "");
        result.put("data", body);
        return result;
    }
}