第一种方法:
MultipartFile file = xxx;
CommonsMultipartFile cf= (CommonsMultipartFile)file;
DiskFileItem fi = (DiskFileItem)cf.getFileItem();
File f = fi.getStoreLocation();
会在项目的根目录的临时文件夹下生成一个文件;
第二种方法:
transferTo(File dest);
会在项目中生成一个新文件;
第三种方法:
File f = (File) xxx 强转即可。前提是要配置multipartResolver,要不然会报类型转换失败的异常。
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="104857600"/>
<property name="maxInMemorySize" value="4096"/>
</bean>
没试过;
第四种方法:
Workbook wb = Workbook.getWorkbook(xxx .getInputStream());
转换为输入流,直接读取;
第五种方法:
byte[] buffer = myfile.getBytes();
先转换为字节数组,没试过;
//显示声明CommonsMultipartResolver为mutipartResolver
@Bean(name = "multipartResolver")
public MultipartResolver multipartResolver(){
CommonsMultipartResolver resolver = new CommonsMultipartResolver();
resolver.setDefaultEncoding("UTF-8");
resolver.setResolveLazily(true);//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.setMaxInMemorySize(40960);
resolver.setMaxUploadSize(50*1024*1024);//上传文件大小 50M 50*1024*1024
return resolver;
}
转载于:https://www.cnblogs.com/huzi007/p/5971197.html