multipartResolver上傳文件配置
1、gradle配置
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compile ('commons-io:commons-io:1.4')compile('commons-fileupload:commons-fileupload:1.2.1') |
2、注冊Bean
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@Bean(name = "multipartResolver")public MultipartResolver multipartResolver(){ CommonsMultipartResolver resolver = new CommonsMultipartResolver(); resolver.setDefaultEncoding("UTF-8"); //resolveLazily屬性啟用是為了推遲文件解析，以在在UploadAction中捕獲文件大小異常 resolver.setResolveLazily(true); resolver.setMaxInMemorySize(40960); //上傳文件大小 50M 50*1024*1024 resolver.setMaxUploadSize(50*1024*1024); return resolver;} |
SpringBoot MultipartResolver的坑
在使用springBoot上傳文件的時候，我們會用到MultipartResolver。我看通過源碼可以看到
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@Configuration@ConditionalOnClass({ Servlet.class, StandardServletMultipartResolver.class, MultipartConfigElement.class })@ConditionalOnProperty(prefix = "spring.http.multipart", name = "enabled", matchIfMissing = true)@EnableConfigurationProperties(MultipartProperties.class)public class MultipartAutoConfiguration { private final MultipartProperties multipartProperties; public MultipartAutoConfiguration(MultipartProperties multipartProperties) { this.multipartProperties = multipartProperties; } @Bean @ConditionalOnMissingBean({ MultipartConfigElement.class, CommonsMultipartResolver.class }) public MultipartConfigElement multipartConfigElement() { return this.multipartProperties.createMultipartConfig(); } @Bean(name = DispatcherServlet.MULTIPART_RESOLVER_BEAN_NAME) @ConditionalOnMissingBean(MultipartResolver.class) public StandardServletMultipartResolver multipartResolver() { StandardServletMultipartResolver multipartResolver = new StandardServletMultipartResolver(); multipartResolver.setResolveLazily(this.multipartProperties.isResolveLazily()); return multipartResolver; } |
可以看出MultipartAutoConfiguration配置類，默認加載的是StandardServletMultipartResolver。
然而，我們往往會在項目中加入commons-fileupload依賴，加載的是CommonsMultipartResolver。此時同時使用兩個，會產生沖突。
解決方案
1、使用SpringBoot 默認的StandardServletMultipartResolver，不依賴commons-fileupload。
2、使用commons-fileupload的CommonsMultipartResolver，
排除默認
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spring: autoconfigure: exclude: org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration |
自定義文件解析對象
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@Bean(name = "multipartResolver")public MultipartResolver multipartResolver() { CommonsMultipartResolver resolver = new CommonsMultipartResolver(); resolver.setDefaultEncoding("UTF-8"); return resolver;} |
以上為個人經驗，希望能給大家一個參考，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/u011110968/article/details/82856736
