SpringBoot 统一页面异常处理

相关博客：SpringBoot 统一异常处理

第一步：创建项目 添加Maven依赖：

    org.springframework.boot
    spring-boot-starter-web



    org.springframework.boot
    spring-boot-starter-thymeleaf


    nz.net.ultraq.thymeleaf
    thymeleaf-layout-dialect
    2.4.1


    org.projectlombok
    lombok
    true


    org.springframework.boot
    spring-boot-starter-test
    test

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

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
public @interface ModelAndView {
}

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

    
        
        错误页面
    
    
        error

        
        
    

第七步：启动项目，结果：