Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sun May 31 23:47:56 CST 2020
There was an unexpected error (type=Internal Server Error, status=500).
Error resolving template [hello], template might not exist or might not be accessible by any of the configured Template Resolvers
网上查看了很久都是一些spring关系加载扫描.html已经一些jar包等配置问题，配置一番发现不是
例如：
spring.thymeleaf.content-type: text/html
spring.thymeleaf.cache: false
spring.thymeleaf.mode: LEGACYHTML5
mvc:
view:
prefix: /
suffix: .html
<dependency>
<groupId>net.sourceforge.nekohtml</groupId>
<artifactId>nekohtml</artifactId>
<version>1.9.22</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<!--web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!--mybatis -->
实际问题出在返回值上：
错误代码：
//方法执行的前后调用
@Around("execution (* com.bootdo.home.controller.HomeController.shownews(..))")
public void around(ProceedingJoinPoint point) throws Throwable{
StatisticDo statisticDo = new StatisticDo();
ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
HttpServletRequest request = servletRequestAttributes.getRequest();
StringBuffer requestURL = request.getRequestURL();
int idValue = Integer.parseInt(request.getParameter("id"));
HashMap map = new HashMap<String,Object>();
String url = requestURL.toString()+idValue;
System.out.println(url);
map.put("url",url);
map.put("newsId",idValue);
HashOperations hashOperations = redisTemplate.opsForHash();
if( hashOperations.get(url,idValue) == null) {
if (statisticService.sqlSearch(url,idValue) == null) {
statisticDo.setUrl(url);
statisticDo.setNewsId(idValue);
statisticDo.setOperateTime(new Date());
statisticDo.setClickDate(new Date());
statisticDo.setTimes(1);
statisticService.save(statisticDo);
statisticService.saveRedis(url, idValue, 1);
} else {
StatisticDo statisticDo1 = statisticService.sqlSearch(url, idValue);
int times1 = statisticDo1.getTimes();
statisticService.updateRedis(url, idValue,times1+1);
statisticService.update(url,idValue);
}
}
else {
int times = (int)hashOperations.get(url, idValue);
statisticService.updateRedis(url,idValue,times+1);
System.out.println(times);
}
point.proceed();//目标方法
}
改正后代码和错误原因：
如果@Around注解的方法也就是环绕的方法设置的是void等
Object proceed = point.proceed();//目标方法
执行后，不能够直接返回页面，因为@Around注解的方法并没有结束，也就不能实现跳转。出现 网页 500错误
package com.bootdo.article.statisticaop;
import com.bootdo.article.domain.StatisticDo;
import com.bootdo.article.service.StatisticService;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.util.Date;
import java.util.HashMap;
/**
* @author helloLi
* @version 1.0
* @date 2020/5/27 10:47
*/
@Aspect
@Component
public class StatisticAop {
@Autowired
private StatisticService statisticService;
@Autowired
RedisTemplate redisTemplate;
//方法执行前调用
@Before("execution (* com.bootdo.home.controller..*.*(..))")
// @Before("execution (* com.bootdo.home.controller.HomeController.shownews())")
public void before() {
System.out.println("before:统计点击量的方法调用之前)");
}
//方法执行后调用
@After("execution (* com.bootdo.home.controller..*.*(..))")
public void after() {
System.out.println("after:统计点击量的方法调用之后)");
}
//方法执行的前后调用
@Around("execution (* com.bootdo.home.controller.HomeController.shownews(..))")
public Object around(ProceedingJoinPoint point) throws Throwable{
StatisticDo statisticDo = new StatisticDo();
ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
HttpServletRequest request = servletRequestAttributes.getRequest();
StringBuffer requestURL = request.getRequestURL();
int idValue = Integer.parseInt(request.getParameter("id"));
HashMap map = new HashMap<String,Object>();
String url = requestURL.toString()+idValue;
System.out.println(url);
map.put("url",url);
map.put("newsId",idValue);
HashOperations hashOperations = redisTemplate.opsForHash();
if( hashOperations.get(url,idValue) == null) {
if (statisticService.sqlSearch(url,idValue) == null) {
statisticDo.setUrl(url);
statisticDo.setNewsId(idValue);
statisticDo.setOperateTime(new Date());
statisticDo.setClickDate(new Date());
statisticDo.setTimes(1);
statisticService.save(statisticDo);
statisticService.saveRedis(url, idValue, 1);
} else {
StatisticDo statisticDo1 = statisticService.sqlSearch(url, idValue);
int times1 = statisticDo1.getTimes();
statisticService.updateRedis(url, idValue,times1+1);
statisticService.update(url,idValue);
}
}
else {
int times = (int)hashOperations.get(url, idValue);
statisticService.updateRedis(url,idValue,times+1);
System.out.println(times);
}
Object proceed = point.proceed();//目标方法
return proceed;
}
//方法运行出现异常时调用
@AfterThrowing(pointcut = "execution (* com.bootdo.home.controller.HomeController.shownews(..))",throwing = "ex")
public void afterThrowing(Exception ex){
System.out.println("aop around 方法中的错误");
System.out.println(ex);
}
}
增加后端点击量信息成功:
