springboot(四)拦截器和全局异常捕捉

github代码：https://github.com/showkawa/springBoot_2017/tree/master/spb-demo/spb-brian-query-service

全部内容：
1.拦截器配置
2.全局的异常捕捉

1.拦截器配置

1.1  重写WebMvcConfigurerAdapter中的addInterceptors方法自定义拦截器

package com.kawa.interceptor;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class SPBWebMvcConfigurerAdapter extends WebMvcConfigurerAdapter{
    /**
    * 拦截器的配置规则
    * @param registry
    */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // addPathPatterns 添加拦截规则
        // excludePathPatterns 排除拦截
        registry.addInterceptor(new LoginInterceptor()).addPathPatterns("/**")
                       .excludePathPatterns("/register","/login");
        super.addInterceptors(registry);
    }
}

1.2 自定义拦截器

package com.kawa.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

/**
 *
 * @author Administrator
 *
 *
 */
public class LoginInterceptor  implements HandlerInterceptor{

    private final static  Logger logger = Logger.getLogger(LoginInterceptor.class);   

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception exception)
            throws Exception {

    }

    @Override
    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
            throws Exception {

    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        logger.info("---------------------------拦截器-----------------------");
        return true;
    }

}

2 全局异常捕捉

package com.kawa.config;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;

/**
 * 全局异常捕捉
 * @author Administrator
 *
 */
@ControllerAdvice
public class GlobaExceptionHandler {
    @ExceptionHandler(Exception.class)
    public ResponseEntity<Map<String,String>> globaException(HttpServletRequest request,Exception exception){
        Map<String,String> map = new HashMap<>();
        map.put("code","500");
        map.put("result","error");
        map.put("message","网络高峰期，等待红绿灯！");
        return new ResponseEntity<Map<String,String>>(map, HttpStatus.OK);
    }
}