全局异常处理
全局数据绑定
全局数据预处理



@RestControllerAdvice 与 @ControllerAdvice的区别 
@RestController 与 @Controller 区别类似

@RestControllerAdvice =  @ControllerAdvice + @ResponseBody

@ExceptionHandler   异常处理 ( 可定义各种异常的处理)
@InitBinder     request 自定义参数解析方式注册 
@ModelAttribute  可返回值或直接操作model


@ExceptionHandler(value = Exception.class)
@ExceptionHandler(value = RuntimeException.class)


@InitBinder
public void globalInitBinder(WebDataBinder binder) {
    binder.addCustomFormatter(new DateFormatter("yyyy-MM-dd"));
}
    
    
org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of type 'java.lang.String' to required type 'java.util.Date'; 
nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [java.util.Date] for value '2021-02-01'; 
nested exception is java.lang.IllegalArgumentException


    @ModelAttribute(value = "globalMessage")
    public String globalModelAttribute() {
        System.out.println("globalModelAttribute set");
        return "globalMessage,"+LocalDateTime.now();
    }
    
    @ModelAttribute 
    public void globalModelAttributeBuild(Model model) {
        System.out.println("globalModelAttributeBuild run");
        model.addAttribute("globalModelAttribute2", "globalModelAttribute2-"+LocalDateTime.now());     
    }
    
    
MyControllerAdvice
AdviceTestController
ErrorController

测试

/errorTest?error=Throwable
/errorTest?error=Error

/errorTest?error=Exception
/errorTest?error=RuntimeException

Throwable  Error 异常 无法拦截处理

/advicetest?date=2021-02-01
/advicetest2?date=2021-02-01


完整代码
https://gitee.com/dyyx/springboothello





import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;


@RestControllerAdvice
public class GlobalExceptionHandler {

    static final Logger LOG = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    @ExceptionHandler(value = Exception.class)
    public Object handleException(Exception ex) {
        LOG.error("GlobalExceptionHandler_handleException",ex);
        return ex+"";
    }
}



 springboot 使用 servlet 过滤器 

 springboot 使用 拦截器