java 如何在 Spring Boot 中使用 CommonsMultipartResolver
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How to use CommonsMultipartResolver in Spring Boot
提问by Carlos Alberto
I have tried to use CommonsMultipartResolver in Boot translating my old application (WAR) to Boot, and right now it got the following code:
我尝试在 Boot 中使用 CommonsMultipartResolver 将我的旧应用程序 (WAR) 转换为 Boot，现在它得到了以下代码：
@Configuration
public class TestConfig {
@Bean
public FilterRegistrationBean openEntityManagerFilterRegistrationBean() {
// Set upload filter
final MultipartFilter multipartFilter = new MultipartFilter();
final FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(multipartFilter);
filterRegistrationBean.addInitParameter("multipartResolverBeanName", "commonsMultipartResolver");
return filterRegistrationBean;
}
@Bean
public CommonsMultipartResolver commonsMultipartResolver() {
final CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
commonsMultipartResolver.setMaxUploadSize(-1);
return commonsMultipartResolver;
}
}
Is this the right way in Boot, cause a I saw some properties to be applied in application.properties. Would they be the same purpose than defining a FilterRegistrationBean?
这是 Boot 中的正确方法吗，导致我看到一些属性要应用到 application.properties 中。它们与定义 FilterRegistrationBean 的目的相同吗？
# MULTIPART (MultipartProperties)
multipart.enabled=true
multipart.file-size-threshold=0 # Threshold after which files will be written to disk.
multipart.location= # Intermediate location of uploaded files.
multipart.max-file-size=1Mb # Max file size.
multipart.max-request-size=10Mb # Max request size.
Could anyone provide any sample how to use it? Thanks.
谁能提供任何示例如何使用它？谢谢。
By the way, It tried to set the property "multipart.enabled=true" and I got:
顺便说一句，它试图设置属性“multipart.enabled=true”，我得到：
Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'enabled' of bean class [org.springframework.boot.autoconfigure.web.MultipartProperties]: Bean property 'enabled' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1076)
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:927)
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:95)
at org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:749)
at org.springframework.validation.DataBinder.doBind(DataBinder.java:645)
at org.springframework.boot.bind.RelaxedDataBinder.doBind(RelaxedDataBinder.java:121)
at org.springframework.validation.DataBinder.bind(DataBinder.java:630)
at org.springframework.boot.bind.PropertiesConfigurationFactory.doBindPropertiesToTarget(PropertiesConfigurationFactory.java:253)
at org.springframework.boot.bind.PropertiesConfigurationFactory.bindPropertiesToTarget(PropertiesConfigurationFactory.java:227)
at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:296)
... 73 common frames omitted
采纳答案by Phil Webb
回答by K. Siva Prasad Reddy
First, there is no enabledproperty in org.springframework.boot.autoconfigure.web.MultipartPropertiesclass.
首先，类中没有启用的属性org.springframework.boot.autoconfigure.web.MultipartProperties。
If you are using Servlet 3 container you no need to use commons-fileupload mechanism and Multipart support is enabled by default. If you don't want to customize any multipart default config no need to add any config in application.propertiesas well.
如果您使用的是 Servlet 3 容器，则无需使用 commons-fileupload 机制，并且默认情况下启用 Multipart 支持。如果您不想自定义任何多部分默认配置，也无需添加任何配置application.properties。
<form method="post" action="upload" enctype="multipart/form-data">
File: <input type="file" name="file"/>
<input type="submit" value="Submit"/>
</form>
@RequestMapping(value="/upload", method=RequestMethod.POST)
public String upload(@RequestPart("file") MultipartFile multipartFile)
{
System.out.println(multipartFile.getOriginalFilename());
return "redirect:/";
}
If you want to use commons-fileupload then adding following configuration is working fine:
如果你想使用 commons-fileupload 然后添加以下配置工作正常：
package demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.embedded.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.multipart.support.MultipartFilter;
@SpringBootApplication
public class BootDemoApplication {
public static void main(String[] args) {
SpringApplication.run(BootDemoApplication.class, args);
}
@Bean
public CommonsMultipartResolver commonsMultipartResolver() {
final CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
commonsMultipartResolver.setMaxUploadSize(-1);
return commonsMultipartResolver;
}
@Bean
public FilterRegistrationBean multipartFilterRegistrationBean() {
final MultipartFilter multipartFilter = new MultipartFilter();
final FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(multipartFilter);
filterRegistrationBean.addInitParameter("multipartResolverBeanName", "commonsMultipartResolver");
return filterRegistrationBean;
}
}
And of course we need to add commons-fileupload dependency.
当然，我们需要添加 commons-fileupload 依赖项。
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
回答by u9703212
If you want to use CommonsMultipartFileto upload a file, please add @EnableAutoConfiguration(exclude = {MultipartAutoConfiguration.class})in your spring boot project. Disable the multi-part configuration in spring boot.
如果你想用来CommonsMultipartFile上传文件，请@EnableAutoConfiguration(exclude = {MultipartAutoConfiguration.class})在你的spring boot项目中添加。在 spring boot 中禁用多部分配置。
public RespDataView provisionalMediaUpload(@RequestParam("file") CommonsMultipartFile file,
@RequestParam("type") String type) {}
