我已经使用
Spring MVC和java配置,我已经定义了一些休息服务.我使用Spring作为服务器后端,使用AngularJS作为WebFrontend.
我想从我的AngularJS网站上传一个或两个CSV文件到我的休息服务.我如何使用java配置配置spring以使其有效？我使用了Tomcat和一个Servlet 3容器.
我的上传休息服务如下所示：
@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.";
}
}
}
我需要“StandardServletMultipartResolver”吗？或其他什么来上传工作？如果是这样,我如何使用java配置启用多部分上传？我的配置目前看起来像这样：
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};
}
}
和WebConfig：
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = { "controller" })
public class WebConfig extends WebMvcConfigurerAdapter {
@Bean
public MultipartResolver multipartResolver(){
return new StandardServletMultipartResolver();
}
}
和ApplicationConfig
@Configuration
public class AppConfig {
@Bean
public Test gettest(){
return new test();
}
}
上传的示例来自此站点http://spring.io/guides/gs/uploading-files/,但他们使用的是MultiPartConfigFactory,这是来自spring boot;我能用这个吗？我目前没有使用弹簧启动..那么使用我的配置进行多部分上传的最简单方法是什么？
EDIT2：我已经为我的配置添加了两个东西上面新的getServletFilter现在看起来像这样,我添加了一个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,mpf};
}
在我的WebConfig中,我添加了一个StandardServletMultipartResolver：
@Bean
public MultipartResolver multipartResolver(){
return new StandardServletMultipartResolver();
}
现在我想用一个简单的html网站测试它,如下所示：
<!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>
但它说“HTTP状态400 – 必需的字符串参数’名称’不存在”.为什么名字不存在！？
如果您使用的是Servlet 3.0,则必须配置调度程序servlet以支持多部分.我遇到了与你完全相同的问题.我配置了多部分解析器bean,但我仍遇到问题.只需将以下行添加到应用程序初始化程序类(扩展WebApplicationInitializer的类)：
dispatcher.setMultipartConfig(
new MultipartConfigElement("/tmp",25 * 1024 * 1024,125 * 1024 * 1024,1 * 1024 * 1024)
);
dispatcher是ServletRegistration.Dynamic的一个实例.有关详细信息,请阅读我对问题here的回答.