SpringBoot默认访问不存在资源就会出现404
解决后:
主要是添加下面配置:
# 自定义
#出现错误时, 直接抛出异常
spring.mvc.throw-exception-if-no-handler-found=true
#不要为我们工程中的资源文件建立映射
spring.web.resources.add-mappings=false
全局处理异常:
package com.qykhhr.dujiaoshouservice.exceptionhandler;
import com.qykhhr.dujiaoshouservice.util.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import java.sql.SQLIntegrityConstraintViolationException;
/**
* 异常处理机制
* 先找到特定异常处理机制,如果没有就会调用Exception异常处理机制
*/
@ControllerAdvice
@Slf4j
public class GlobalExceptionHandler {
/**
* 指定出现什么异常来执行这个方法
* @param e
* @return
*/
@ExceptionHandler(Exception.class)
@ResponseBody
public R error(Exception e){
e.printStackTrace();
if (e instanceof SQLIntegrityConstraintViolationException){
return R.error().message("数据库主键冲突,如是本人,请联系管理员");
}else if (e instanceof org.springframework.web.servlet.NoHandlerFoundException){
return R.error().message("找不到资源,/(ㄒoㄒ)/~~");
}
return R.error().message("内部服务器错误,/(ㄒoㄒ)/~~!");
}
/**
* 自定义异常处理
* @param e
* @return
*/
@ExceptionHandler(DujiaoshouException.class)
@ResponseBody
public R error(DujiaoshouException e){
log.error(e.getMessage());
e.printStackTrace();
return R.error().code(e.getCode()).message(e.getMsg());
}
}
统一结果返回:
package com.qykhhr.dujiaoshouservice.util;
import lombok.Data;
import java.util.HashMap;
import java.util.Map;
/**
* 统一返回结果的类
* @author 雨林
*/
@Data
public class R {
private Boolean success;
private Integer code;
private String message;
private Map<String,Object> data = new HashMap<>();
// 把构造方法私有化,只能使用提供的静态方法
private R(){
}
// 成功静态方法
public static R ok(){
R r = new R();
r.setSuccess(true);
r.setCode(ResultCode.SUCCESS);
r.setMessage("成功");
return r;
}
// 失败静态方法
public static R error(){
R r = new R();
r.setSuccess(false);
r.setCode(ResultCode.ERROR);
r.setMessage("失败");
return r;
}
public R message(String message){
this.setMessage(message);
return this;
}
public R code(Integer code){
this.setCode(code);
return this;
}
public R data(Map<String, Object> map){
this.setData(map);
return this;
}
public R data(String key, Object value){
this.data.put(key, value);
return this;
}
}
我有发现了一个问题,因为我配置了映射,当我访问upload请求找不到文件时,依旧返回了SpingBoot的默认404页面.
upload.image.path=/util/images/
upload.apk.path=/util/apk/
upload.crash.exception.file.path=/util/crash/
/**
* 资源映射路径,只能配置一个映射
*/
@Configuration
public class MyWebMvcConfigurer extends WebMvcConfigurerAdapter {
@Value("${upload.file.path}")
private String uploadPath;
@Value("${upload.image.path}")
private String uploadImagePath;
@Value("${upload.crash.exception.file.path}")
private String uploadCrashExceptionFilePath;
@Value("${upload.apk.path}")
private String uploadApkPath;
/**
* 将D:\\upload下的文件映射到当前项目/upload/下
* @param registry
*/
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/favicon.ico").addResourceLocations("classpath:/static/");
//addResourceHandler()里配置需要映射的文件夹,此处代表映射文件夹user下的所有资源。
//addResourceLocations()配置文件夹在系统中的路径,使用绝对路径,格式为“file:你的路径/” 后面的 / 必须加上,否则映射失效
// registry.addResourceHandler("/upload/**").addResourceLocations("file:D:/dujiaoshouapp/");
// registry.addResourceHandler("/upload/**").addResourceLocations("file:"+uploadPath);
registry.addResourceHandler("/upload/images/**").addResourceLocations("file:"+uploadImagePath);
registry.addResourceHandler("/upload/crash/**").addResourceLocations("file:"+uploadCrashExceptionFilePath);
registry.addResourceHandler("/upload/apk/**").addResourceLocations("file:"+uploadApkPath);
}
}