春节休息分段文件上传与AngularJS（Java的配置）？ [英] Spring Rest Multipart file upload with AngularJS (Java Config)?

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问题描述

我用的Spring MVC与Java的配置，我已经定义了一些其他的服务。我用Spring作为服务器后端和AngularJS为WebFrontend。

我想从我的AngularJS站点中的一个或两个的CSV文件到我的休息服务上传。如何我必须配置Spring的Java配置，这样它的作品？我用Tomcat和一个Servlet容器3

我上传REST服务是这样的：

  @Controller
@RequestMapping（上传）
@MultipartConfig（fileSizeThreshold = 1024 * 1024 * 10 // 10 MB
MAXFILESIZE = 1024 * 1024 * 50，// 50 MB
maxRequestSize = 1024 * 1024 * 100）// 100 MB
公共类UploadController {    @RequestMapping（值=/上传，方法= RequestMethod.GET）
    公共字符串@ResponseBody provideUploadInfo（）{
        返回你可以通过发布此相同的URL上传的文件。
    }    @RequestMapping（值=/上传，方法= RequestMethod.POST）
    公共字符串@ResponseBody handleFileUpload（@RequestParam（name）的字符串名称，
            @RequestParam（文件）MultipartFile文件）{
        如果（！file.isEmpty（））{
            尝试{
                字节[]字节= file.getBytes（）;
                的BufferedOutputStream流=
                        新的BufferedOutputStream（新的FileOutputStream（新文件（名称+-uploaded）））;
                stream.write（字节）;
                stream.close（）;
                返回您已成功上传+姓名+到+姓名+-uploaded！;
            }赶上（例外五）{
                返回你上传失败+姓名+=＆gt;中+ e.getMessage（）;
            }
        }其他{
            返回你上传失败+姓名+，因为该文件是空的。
        }
    }}

我需要一个StandardServletMultipartResolver？或其他任何让上传工作？如果是这样，我怎么能实现用java配置多部分上传？我此刻的配置是这样的：

 公共类WebInitializer扩展AbstractAnnotationConfigDispatcherServletInitializer {    @覆盖
    保护类＆LT;＆GT; [] getRootConfigClasses（）{
        返回新的Class＆LT;＆GT; [] {PersistenceContext.class，AppConfig.class，SecurityConfig.class};
    }    @覆盖
    保护类＆LT;＆GT; [] getServletConfigClasses（）{
        返回新的Class＆LT;＆GT; [] {} WebConfig.class;
    }    @覆盖
    受保护的String [] getServletMappings（）{
        返回新的String [] {/春/ *};
    }    @覆盖
    保护过滤器[] getServletFilters（）{        CharacterEncodingFilter characterEncodingFilter =新CharacterEncodingFilter（）;
        characterEncodingFilter.setEncoding（UTF-8）;        CorsFilter CF =新CorsFilter（）;
            MultipartFilter MPF =新MultipartFilter（）; // MultipartFilter支持
        返回新的过滤[] {characterEncodingFilter，CF，强积金};    }
}

和WebConfig：

  @Configuration
    @EnableWebMvc
    @ComponentScan（basePackages = {控制器}）
    公共类WebConfig扩展WebMvcConfigurerAdapter {       @豆
公共MultipartResolver multipartResolver（）{        返回新StandardServletMultipartResolver（）;
    }

}

和ApplicationConfig 

  @Configuration
公共类的AppConfig {    @豆
    公开测试getTest（）{
        返回新的测试（）;
    }
}

与上传的示例是从本网站 http://spring.io/guides/gs/uploading-files / 但他们用MultiPartConfigFactory，这是从春天开机;我可以用这个来？我没有在目前使用的春天开机。那么什么是让多部分上传我的配置工作的最简单的方法！？

EDIT2：我已经添加了两件事情对我的配置上面新getServletFilter看起来现在这​​个样子，我添加了一个MultipartFilter（）：

  @覆盖
    保护过滤器[] getServletFilters（）{        CharacterEncodingFilter characterEncodingFilter =新CharacterEncodingFilter（）;
        characterEncodingFilter.setEncoding（UTF-8）;
        CorsFilter CF =新CorsFilter（）;        MultipartFilter MPF =新MultipartFilter（）; // MultipartFilter支持
        返回新的过滤[] {characterEncodingFilter，CF，强积金};    }

和在我的WebConfig我添加了一个StandardServletMultipartResolver：

  @Bean
公共MultipartResolver multipartResolver（）{        返回新StandardServletMultipartResolver（）;
    }

现在我想用一个简单的HTML这样的网站来测试它：

 ＆LT; D​​OCTYPE HTML PUBLIC -  // W3C // DTD HTML 4.01过渡// ENhttp://www.w3.org/TR/html4/loose！ DTD＆GT;
＆LT; HTML和GT;
＆LT; HEAD＆GT;
＆LT; META HTTP-EQUIV =Content-Type的CONTENT =text / html的;字符集= ISO-8859-1＆GT;
＆LT;标题＆gt;此处插入标题＆LT; /标题＆GT;
＆LT; /头＆GT;
＆LT;身体GT;＆LT;形式方法=POSTENCTYPE =的multipart / form-data的
        行动=HTTP：//本地主机：8081 /项目/春/上传/上传＆GT;
        文件上传：LT;输入类型=文件名称=文件＆GT;＆LT; BR /＆GT;名称：或其可输入
            TYPE =文本名称=名字＆GT;＆LT; BR /＆GT; ＆LT; BR /＆GT; ＆LT;输入类型=提交
            值=上传＆GT;这里preSS要上传的文件！
    ＆LT; /表及GT;＆LT; /身体GT;
＆LT; / HTML＆GT;

但它说HTTP状态400 - 必需的字符串参数'名'是不是present。为什么不名称present！？


解决方案

  1. 我有同样的问题，事实证明，这是由于StandardServletMultipartResolver。它改成org.springframework.web.multipart.commons.CommonsMultipartResolver
    <一href=\"http://stackoverflow.com/questions/25830503/spring-mvc-http-status-400-required-multipartfile-parameter-file-is-not-$p$p\"标题=解决方案在这里找到>见从那里我得到了这个解决方案


  2. 这可能不会涉及到在这个岗位psented问题$ P $，但可能会有所帮助。
    具有调试打开，我可以看到在记录此调试消息： -
    请求已经是MultipartHttpServletRequest - 如果不是在前进，这通常是从一个额外的MultipartFilter导致的web.xml


得到通过删除 MultipartFilter 在 getServletFilters摆脱这种从过滤器的阵列（）。
MultipartFilter MPF =新MultipartFilter（）;

I have used spring MVC with java config and I have defined some rest-services. I used Spring as server backend and AngularJS as WebFrontend.

I want upload from my AngularJS site one or two CSV files to my rest service. How must i configure spring with java config so that it works? I used Tomcat and a Servlet 3 Container.

My upload rest service looks like this:

@Controller
@RequestMapping("Upload")
@MultipartConfig(fileSizeThreshold=1024*1024*10,    // 10 MB
maxFileSize=1024*1024*50,          // 50 MB
maxRequestSize=1024*1024*100)      // 100 MB
public class UploadController {

    @RequestMapping(value="/upload", method=RequestMethod.GET)
    public @ResponseBody String provideUploadInfo() {
        return "You can upload a file by posting to this same URL.";
    }

    @RequestMapping(value="/upload", method=RequestMethod.POST)
    public @ResponseBody String handleFileUpload(@RequestParam("name") String name, 
            @RequestParam("file") MultipartFile file){
        if (!file.isEmpty()) {
            try {
                byte[] bytes = file.getBytes();
                BufferedOutputStream stream = 
                        new BufferedOutputStream(new FileOutputStream(new File(name + "-uploaded")));
                stream.write(bytes);
                stream.close();
                return "You successfully uploaded " + name + " into " + name + "-uploaded !";
            } catch (Exception e) {
                return "You failed to upload " + name + " => " + e.getMessage();
            }
        } else {
            return "You failed to upload " + name + " because the file was empty.";
        }
    }

}

Do i need a "StandardServletMultipartResolver" ? or anything else to get the upload to work ? and if so, how can i enable the multi-part upload with java config ? my config at the moment looks like this:

public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]{ PersistenceContext.class,AppConfig.class,SecurityConfig.class }; 
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[] { WebConfig.class };
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/Spring/*" }; 
    }

    @Override
    protected Filter[] getServletFilters() {

        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding("UTF-8");

        CorsFilter cf=new CorsFilter();
            MultipartFilter mpf=new MultipartFilter(); //MultipartFilter support
        return new Filter[] {characterEncodingFilter,cf,mpf};

    }




}

and WebConfig:

@Configuration
    @EnableWebMvc
    @ComponentScan(basePackages = { "controller" })
    public class WebConfig extends WebMvcConfigurerAdapter {

       @Bean
public MultipartResolver multipartResolver(){

        return new StandardServletMultipartResolver();
    }

}

and ApplicationConfig

@Configuration
public class AppConfig {

    @Bean
    public Test getTest(){


        return new Test();
    }
}

The Example with the upload is from this site http://spring.io/guides/gs/uploading-files/ but they used a MultiPartConfigFactory and this is from spring boot; can i use this to ? i did not use spring boot at the moment.. So What is the easiest way to get the multi-part upload working with my configuration!?

EDIT2: I have added two things to my configuration Above the new getServletFilter looks now like this, i have added a MultipartFilter():

@Override
    protected Filter[] getServletFilters() {

        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding("UTF-8");


        CorsFilter cf=new CorsFilter();

        MultipartFilter mpf=new MultipartFilter(); //MultipartFilter support


        return new Filter[] {characterEncodingFilter,cf,mpf};

    }

and in my WebConfig i have added a StandardServletMultipartResolver:

@Bean
public MultipartResolver multipartResolver(){

        return new StandardServletMultipartResolver();
    }

Now i want to test it with a simple html site like this:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

<form method="POST" enctype="multipart/form-data"
        action="http://localhost:8081/project/Spring/Upload/upload">
        File to upload: <input type="file" name="file"><br /> Name: <input
            type="text" name="name"><br /> <br /> <input type="submit"
            value="Upload"> Press here to upload the file!
    </form>

</body>
</html>

but it says "HTTP Status 400 - Required String parameter 'name' is not present". why is name not present !?

解决方案

  1. I had the same issue, and it turned out that it was due to the StandardServletMultipartResolver. Changed it to org.springframework.web.multipart.commons.CommonsMultipartResolver See stackoverflow post from where I got this solution

  2. This may not be related to the problem presented in this post, but may help. With DEBUG turned on, I could see this DEBUG message in the logs:- "Request is already a MultipartHttpServletRequest - if not in a forward, this typically results from an additional MultipartFilter in web.xml"

Got rid of this by removing the MultipartFilter from the array of filters in getServletFilters(). MultipartFilter mpf=new MultipartFilter();

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