1.问题描述:
之前用spring MVC，转成spring boot之后发现上传不能用。网上参考说是spring boot已经有CommonsMultipartResolver了，但是我的上传后台接收的还是null。
2.第一种解决方法
加入配置类
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
@Configuration
public class UploadConfig {
//显示声明CommonsMultipartResolver为mutipartResolver
@Bean(name = "multipartResolver")
public MultipartResolver multipartResolver() {
CommonsMultipartResolver resolver = new CommonsMultipartResolver();
resolver.setDefaultEncoding("UTF-8");
//resolveLazily属性启用是为了推迟文件解析，以在在UploadAction中捕获文件大小异常
resolver.setResolveLazily(true);
resolver.setMaxInMemorySize(40960);
//上传文件大小 5M 5*1024*1024
resolver.setMaxUploadSize(5 * 1024 * 1024);
return resolver;
}
}在springboot启动类上加入注解
//排除原有的Multipart配置
@EnableAutoConfiguration(exclude = {MultipartAutoConfiguration.class})
public class Application extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
特别注意Controller接收的时候一定要加上@RequestParam,否则不可用,如下所示:
@RequestParam("file") MultipartFile multipartFile
第二种方法：注（请自行搜索您项目中Filter的拦截类，以下针对自己的项目中的请求）
如果说还是不行就可能项目中的file拦截器做了http请求处理或者做了请求转化，如果是因为这个下面解决方式重写方法
package com.wl.partner.aspect;
import com.cre.dmp.osp.app.gateway.RequestWrapper;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.support.StandardMultipartHttpServletRequest;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* 此类为一个切面类，主要作用就是对接口的请求进行拦截
* 注：废弃{拦截的方式，只需要在指定接口方法上面加上@MonitorRequest注解即可}
* chufangbo
* 2020-09-28
*/
@Aspect
@Component
@WebFilter(
urlPatterns = {"*"},
filterName = "tokenAuthorFilter"
)
public class RequestAspect implements Filter{
// /**
// * 表示在执行被@MonitorRequest 会执行doBefore()方法
// *
// * @param joinPoint 连接点，就是被拦截点
// */
// @Before(value = "@annotation(com.wl.partner.aspect.MonitorRequest)")
// public void doBefore(JoinPoint joinPoint){
// System.out.println("--------------表示在执行被@MonitorRequest 会执行doBefore()方法--------------------");
// //获取到请求的属性
// ServletRequestAttributes attributes =
// (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
// //获取到请求对象
// HttpServletRequest request = attributes.getRequest();
// //URL：根据请求对象拿到访问的地址
// urlGl=request.getRequestURL().toString();
// logger.info("url=" + request.getRequestURL());
// //获取请求的方法，是Get还是Post请求
// logger.info("method=" + request.getMethod());
// //ip：获取到访问
// logger.info("ip=" + request.getRemoteAddr());
// //获取被拦截的类名和方法名
// logger.info("class=" + joinPoint.getSignature().getDeclaringTypeName() +
// "and method name=" + joinPoint.getSignature().getName());
// //参数
// logger.info("参数=" + joinPoint.getArgs().toString());
// //方法内部类即嵌套在方法里面
// }
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest servletRequest1 = (HttpServletRequest) servletRequest;
String requestURI = servletRequest1.getRequestURI();
//TODO URL：根据请求对象拿到访问的地址(放开导入拦截) 此处需要配置项目路径的具体方法
// List<String> passlist = new ArrayList<>();
// passlist.add("/wl-ltx-partner-api/excelAllController/importCityManagerDealer");
// passlist.add("/wl-ltx-partner-api/partnerController/importPartner");
ServletRequest requestWrapper = null;
if (!requestURI.contains("/wl-ltx-partner-api/excelAllController")) {
//if (!passlist.contains(requestURI)) {
requestWrapper = new RequestWrapper((HttpServletRequest)servletRequest);
}
if (requestWrapper == null) {
System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>开始进入自定义导入：重写doFilter 跳过内置getWay拦截{HttpServletFilter}<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
StandardMultipartHttpServletRequest standardMultipartHttpServletRequest = new StandardMultipartHttpServletRequest((HttpServletRequest) servletRequest);
filterChain.doFilter(standardMultipartHttpServletRequest, servletResponse);
} else {
//System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>走内置com.cre.dmp.osp.app.gateway.filter【getWay】拦截{HttpServletFilter}<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
filterChain.doFilter(requestWrapper, servletResponse);
}
}
}
如果说还是不行请查询日志打印的请求拦截处理
跳过：&& !execution(* com.wl.partner.controller.ExcelAllController.*(..)) 拦截
package com.wl.partner.aspect;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 全局日志打印--liuling
*/
@Component
@Aspect
@Slf4j
public class LogAspect {
//跳过导入导出的controller&& !execution(* com.wl.partner.controller.ExcelAllController.*(..))
@Pointcut("execution(public * com.wl.partner.controller..*.*(..)) && !execution(* com.wl.partner.controller.ExcelAllController.*(..))")
public void webLog() {
}
@Before("webLog()")
public void doBefore(JoinPoint joinPoint) throws Throwable {
// 接收到请求，记录请求内容
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
// 记录下请求内容
if (joinPoint.getArgs().length>0) {
if (joinPoint.getArgs()[0] instanceof HttpServletResponse) {
if (joinPoint.getArgs().length > 1) {
log.info("-------------------------------------收到请求 --> " + request.getRequestURL().toString() + ":" + JSONObject.toJSONString(joinPoint.getArgs()[1]));
} else {
log.info("-------------------------------------收到请求 --> " + request.getRequestURL().toString());
}
} else {
log.info("-------------------------------------收到请求 --> " + request.getRequestURL().toString() + ":" + JSONObject.toJSONString(joinPoint.getArgs()[0]));
}
}
}
@AfterReturning(returning = "ret", pointcut = "webLog()")
public void doAfterReturning(Object ret) throws Throwable {
// 处理完请求，返回内容
log.info("-------------------------------------返回参数--> : " + JSONObject.toJSONString(ret));
}
}
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