第一步：创建项目 添加Maven依赖： dependency groupIdorg.springframework.boot/groupId artifactIdspring-boot-starter-web/artifactId/dependency!-- 集成thymeleaf--dependency groupIdorg.springframework.boot/groupId artifactIdspring
第一步：创建项目
添加Maven依赖：
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 集成thymeleaf--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>nz.net.ultraq.thymeleaf</groupId> <artifactId>thymeleaf-layout-dialect</artifactId> <version>2.4.1</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency>application.yml
server: port: 80 servlet: context-path: /wpe spring: thymeleaf: #前缀，也就是模板存放的路径 prefix: classpath:/templates/ #编码格式 encoding: UTF-8 check-template-location: false #关闭缓存，不然无法看到实时页面 cache: false #后缀 suffix: .html #设置不严格的html mode: HTML servlet: content-type: text/html第二步：自定义异常
CustomException.java：
public class CustomException extends RuntimeException { // 异常错误编码 private Integer code; // 异常信息 private String msg; private CustomException() { } public CustomException(Integer code, String msg) { this.code = code; this.msg = msg; } public Integer getCode() { return code; } public String getMsg() { return msg; } }ModelAndViewException.java
public class ModelAndViewException extends RuntimeException { // 异常错误编码 private Integer code; // 异常信息 private String msg; private ModelAndViewException() { } public static ModelAndViewException transfer(CustomException e) { return new ModelAndViewException(e.getCode(), e.getMessage()); } private ModelAndViewException(int code, String msg) { this.code = code; this.msg = msg; } public Integer getCode() { return code; } public String getMsg() { return msg; } }第三步：自定义异常处理器
@ControllerAdvice @Slf4j public class GlobalExceptionHandler { @ExceptionHandler(ModelAndViewException.class) public ModelAndView viewExceptionHandler(HttpServletRequest req, ModelAndViewException e) { ModelAndView modelAndView = new ModelAndView(); //将异常信息设置如modelAndView modelAndView.addObject("exception", e); modelAndView.addObject("url", req.getRequestURL()); modelAndView.setViewName("error"); //返回ModelAndView return modelAndView; } }第四步：自定义注解及处理器
注解
@Documented @Retention(RetentionPolicy.RUNTIME) @Target({ElementType.METHOD}) public @interface ModelAndView { }注解处理器
@Aspect @Component public class ModelViewAspect { //设置切入点：这里直接拦截被@ModelView注解的方法 @Pointcut("@annotation(com.hc.anno.ModelAndView)") public void pointcut() { } /** * 当有ModelAndView的注解的方法抛出异常的时候，做如下的处理 */ @AfterThrowing(pointcut="pointcut()",throwing="e") public void afterThrowable(Throwable e) { if(e instanceof CustomException){ throw ModelAndViewException.transfer((CustomException) e); } } }第五步：创建Controller
@Controller @RequestMapping("/mave") @Slf4j public class ModelAndViewExceptionController { /** * 模拟系统异常 */ @ModelAndView @GetMapping("/fun1") public String fun1() { try { Class.forName("com.mysql.jdbc.xxxx.Driver"); } catch (ClassNotFoundException e) { throw new CustomException(400,"在XXX业务，ff1()方法内，出现ClassNotFoundException"); } return "index"; } }第六步：在resources/templates目录下创建error.html
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"> <head lang="en"> <meta charset="UTF-8"/> <title>错误页面</title> </head> <body> error <div th:text="${exception}"></div> <div th:text="${url}"></div> </body> </html>第七步：启动项目，结果：
