springboot 全局异常
import com.alibaba.fastjson.JSON;
import com.huifu.hongpos.profit.application.constants.Constant;
import com.huifu.hongpos.profit.application.constants.RespCode;
import io.undertow.server.handlers.form.MultiPartParserDefinition;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import java.util.HashMap;
import java.util.Map;
@ControllerAdvice
@ResponseBody
@Slf4j
public class CommonExceptionAdvice {
@ResponseStatus(HttpStatus.OK)
@ExceptionHandler(MultiPartParserDefinition.FileTooLargeException.class)
public String fileTooLarge(MultiPartParserDefinition.FileTooLargeException e) {
log.error("文件过大异常", e);
return "文件太大";
}
}
设置文件大小限制
springboot-1.x
spring.http.multipart.max-file-size=100mb
spring.http.multipart.max-request-size=1000mb
springboot-2.x
#设置上传APP的大小限制
spring.servlet.multipart.max-file-size=100Mb
spring.servlet.multipart.max-request-size=100Mb
定义 Bean
@Configuration
public class UploadConfig {
@Bean
public MultipartConfigElement multipartConfigElement() {
MultipartConfigFactory factory = new MultipartConfigFactory();
//单个文件最大
factory.setMaxFileSize("20480KB"); //KB,MB
/// 设置总上传数据总大小
factory.setMaxRequestSize("1024000KB");
return factory.createMultipartConfig();
}
}
undertow 异常无法捕获
maven 依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-undertow</artifactId>
</dependency>
版本：springboot 1.5x
配置设置
# 文件上传限制
spring.http.multipart.maxFileSize=10MB
spring.http.multipart.maxRequestSize=100MB
全局异常
// 上传文件过大
@ExceptionHandler(value = { MaxUploadSizeExceededException.class })
public Object maxUploadSizeExceededException(HttpServletRequest request, HttpServletResponse response,
MaxUploadSizeExceededException exception) throws IOException {
return this.errorHandler(request, response,
Message.fail(HttpStatus.BAD_REQUEST, "文件大小不能超过:" + exception.getMaxUploadSize()), exception);
}
处理
如果上传比较小的文件，那么一切正常，如果上传比较大的文件，直接异常，且无法捕获：
Caused by: io.undertow.server.handlers.form.MultiPartParserDefinition$FileTooLargeException: UT000054: The maximum size 8388608 for an individual file in a multipart request was exceeded
at io.undertow.server.handlers.form.MultiPartParserDefinition$MultiPartUploadHandler.data(MultiPartParserDefinition.java:262)
at io.undertow.util.MultipartParser$IdentityEncoding.handle(MultipartParser.java:365)
at io.undertow.util.MultipartParser$ParseState.entity(MultipartParser.java:343)
at io.undertow.util.MultipartParser$ParseState.parse(MultipartParser.java:131)
at io.undertow.server.handlers.form.MultiPartParserDefinition$MultiPartUploadHandler.parseBlocking(MultiPartParserDefinition.java:222)
at io.undertow.servlet.spec.HttpServletRequestImpl.parseFormData(HttpServletRequestImpl.java:792)
... 37 common frames omitted
MaxUploadSizeExceededException cannot be caught with undertow
发现这个是官方说的一个确实存在问题。
解决方案
网上有一些让舍弃 undertow，直接使用 tomcat 的。
我这边无法直接修改容器，影响比较大。于是直接想在前端做一下校验。
前端限制大小
<input type="file" id="file1" />
<script>
var size = $("#file1")[0].files[0].size;
</script>
加一个简单的判断即可：
// 文件大小，最大为 8M
var size = fileInput[0].files[0].size;
if(size > 8 * 1000 * 1000) {
alert("文件大小不可超过 8M!");
return;
}
参考资料
spring boot 上传附件文件过大时,没法捕捉异常(二)
springBoot 全局异常捕捉（里面包含个各种常见异常）
MaxUploadSizeExceededException cannot be caught with undertow
