public class MySelfInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("在業(yè)務(wù)處理器處理請求之前被調(diào)用");
       //可以進行權(quán)限校驗，安全控制
        MyRequestWrapper requestWrapper = new MyRequestWrapper (request);
        // 讀取請求內(nèi)容
        BufferedReader br = requestWrapper.getReader();
        String line = null;
        StringBuilder sb = new StringBuilder();
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }
        // 將json字符串轉(zhuǎn)換為json對象
        JSONObject body = JSONObject.parseObject(sb.toString());
        //業(yè)務(wù)處理
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("在業(yè)務(wù)處理器處理請求執(zhí)行完成后，生成視圖之前執(zhí)行");
        //可以對返回來的ModelAndView進行處理，這個時候還未渲染視圖
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("在DispatcherServlet完全處理完請求后被調(diào)用");
        //請求已經(jīng)完成，頁面已經(jīng)渲染，數(shù)據(jù)已經(jīng)返回。這個時候可以做一些資源清理，或者記錄請求調(diào)用時間，做性能監(jiān)控
    }
}

@Component
public class MyInterceptor extends HandlerInterceptorAdapter {
    public SingleLoginInterceptor() {
        super();
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        return super.preHandle(request, response, handler);
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        super.postHandle(request, response, handler, modelAndView);
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        super.afterCompletion(request, response, handler, ex);
    }
    @Override
    public void afterConcurrentHandlingStarted(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        super.afterConcurrentHandlingStarted(request, response, handler);
    }
}

@Component
public class MyInterceptor implements WebRequestInterceptor {
    @Override
    public void preHandle(WebRequest webRequest) throws Exception {
    }
    @Override
    public void postHandle(WebRequest webRequest, ModelMap modelMap) throws Exception {
    }
    @Override
    public void afterCompletion(WebRequest webRequest, Exception e) throws Exception {
    }
}

@Configuration
public class CenterinsRequestInterceptor implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
    }
}

@Configuration
public class WebCofiguration extends WebMvcConfigurerAdapter {
     @Bean
	MyInterceptor getMyInterceptor (){
		return new MyInterceptor ();
	}
    public void addInterceptors(InterceptorRegistry registry) {
            // 將自己定義的攔截器注入進來進行攔截操作
        //registry.addInterceptor(new MySelfInterceptor ()) // 如果是new 出來的對象 會導致 攔截器中自動裝配為空
       registry.addInterceptor(getMyInterceptor ())
                .addPathPatterns("/**")
                .excludePathPatterns("/logout");
                //過濾器可以添加多個，這里的addPathPatterns的/**是對所有的請求都做攔截。
                //excludePathPatterns代表排除url的攔截路徑，即不攔截
    }
}

@Configuration
public class MyInterceptorConfig extends WebMvcConfigurationSupport {
    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
        super.addInterceptors(registry);
    }
}

@Override
protected void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");
    super.addResourceHandlers(registry);
}

@Configuration
public class MyInterceptorConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 實現(xiàn)WebMvcConfigurer不會導致靜態(tài)資源被攔截
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
    }
}

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface LogData {
}

@LogData
public ResponseMessage getUserList(@RequestParam Long id) {
        return ResponseMessage.ok();
    }

@Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //這個方法將在請求處理之前進行調(diào)用。注意：如果該方法的返回值為false ，將視為當前請求結(jié)束，不僅自身的攔截器會失效，還會導致其他的攔截器也不再執(zhí)行。
        log.info("進入到攔截器中:preHandle() 方法");
        HandlerMethod handlerMethod = (HandlerMethod) handler;
        LogData loginVerify = handlerMethod.getMethodAnnotation(LogData .class);
        if (loginVerify == null) {
            log.info("不需要對該路徑 進行攔截");
            return true;
        }else {
            log.info("對該路徑 進行攔截");
            log.info("業(yè)務(wù)操作...");
            return true;
        }
    }

 
import dm.jdbc.e.e;
import dm.jdbc.util.StreamUtil;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import lombok.extern.slf4j.Slf4j;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.*;
import java.nio.charset.StandardCharsets;
/**
  * 重寫 HttpServletRequestWrapper 
  * 
  */
@Slf4j
public class MyRequestWrapper extends HttpServletRequestWrapper {
	private byte[]  body; //用于保存讀取body中數(shù)據(jù)
    public MyRequestWrapper (HttpServletRequest request) throws IOException {    
        super(request);
        //讀取請求的數(shù)據(jù)保存到本類當中
        //body = StreamUtil.readBytes(request.getReader(), "UTF-8");
		StringBuilder stringBuilder = new StringBuilder();
		BufferedReader bufferedReader = null;
		InputStream inputStream = null;
		try{
			inputStream = request.getInputStream();
			if(inputStream != null){
				bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
				char[] charBuffer = new char[128];
				int bytesRead =-1;
				while((bytesRead = bufferedReader.read(charBuffer)) >0){
					stringBuilder.append(charBuffer,0, bytesRead);
				}
			}else{
				stringBuilder.append("");
			}
		}catch (Exception e){
		}finally {
			if(inputStream != null){
				inputStream.close();
			}
			if(bufferedReader != null){
				bufferedReader.close();
			}
		}
		body = stringBuilder.toString().getBytes();
    }
    //覆蓋（重寫）父類的方法
    @SuppressFBWarnings("DM_DEFAULT_ENCODING")
	@Override
    public BufferedReader getReader() throws IOException {    
        return new BufferedReader(new InputStreamReader(getInputStream()));    
    }    
    //覆蓋（重寫）父類的方法
    @Override    
    public ServletInputStream getInputStream() throws IOException {    
        final ByteArrayInputStream bais = new ByteArrayInputStream(body);
        return new ServletInputStream() {    
            @Override    
            public int read() throws IOException {    
                return bais.read();    
            }
			@Override
			public boolean isFinished() {
				// TODO Auto-generated method stub
				return false;
			}
			@Override
			public boolean isReady() {
				// TODO Auto-generated method stub
				return false;
			}
			@Override
			public void setReadListener(ReadListener arg0) {
				// TODO Auto-generated method stub
			} 
        };    
    }
    /**
     * 獲取body中的數(shù)據(jù)
     * @return
     */
	public byte[] getBody() {
		return body;
	}
	/**
	 * 把處理后的參數(shù)放到body里面
	 * @param body
	 */
	public void setBody(byte[] body) {
		this.body = body;
	}
}

import lombok.extern.slf4j.Slf4j;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
 * 過濾器
 * 
 */
@Slf4j
@WebFilter(urlPatterns = "/*", filterName = "logSignDataFilter")
public class LogSignDataFilter implements Filter {
	@Override
	public void destroy() {
	}
	@Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
		ServletRequest requestWrapper = null;
		if(request instanceof HttpServletRequest){
			requestWrapper = new MyRequestWrapper ((HttpServletRequest) request);
		}
		if(requestWrapper == null){
			filterChain.doFilter(request, response);
		}else{
			filterChain.doFilter(requestWrapper, response);
		}
    }
	@Override
	public void init(FilterConfig config) throws ServletException {
	}
}