发布于 2017-11-12 13:27:36 | 153 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Java并发编程示例,程序狗速度看过来!

Java程序设计语言

java 是一种可以撰写跨平台应用软件的面向对象的程序设计语言,是由Sun Microsystems公司于1995年5月推出的Java程序设计语言和Java平台(即JavaEE(j2ee), JavaME(j2me), JavaSE(j2se))的总称。


这篇文章主要介绍了Java Spring MVC 上传下载文件配置及controller方法详解,本文介绍的非常详细,具有参考借鉴价值,需要的朋友可以参考下

下载:

1.在spring-mvc中配置(用于100M以下的文件下载)


<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> 
<property name="messageConverters"> 
<list> 
<!--配置下载返回类型-->
<bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/> 
<bean class="org.springframework.http.converter.StringHttpMessageConverter"> 
<!--配置编码方式-->
<property name="supportedMediaTypes" value="application/json; charset=UTF-8" /> 
</bean> 
</list> 
</property> 
</bean>

下载文件代码


@RequestMapping("/file/{name.rp}")
public ResponseEntity<byte[]> fileDownLoad(@PathVariable("name.rp")String name, HttpServletRequest request,HttpServletResponse response) {
// @PathVariable String name,
// @RequestParam("name")String name,
// System.out.println("<name>"+name);
// System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
ResponseEntity<byte[]> re = null;
try {
/**
* css,js,json,gif,png,bmp,jpg,ico,doc,docx,xls,xlsx,txt,swf,pdf
* **/
//下载防止静态加载干扰
Feelutile f=new Feelutile();
name=f.getfileformat(name);
String pathString="C:\\tempDirectory\\"+name; 
File file=new File(pathString);
HttpHeaders headers=new HttpHeaders();
//String filename=URLEncoder.encode(name, "UTF-8");//为了解决中文名称乱码问题 
String filename=new String(name.getBytes("utf-8"),"utf-8");
byte[] by=FileUtils.readFileToByteArray(file);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
//URLEncoder.encode(filename, "UTF-8")
headers.setContentDispositionFormData("attachment",filename);
headers.setContentLength(by.length);
re=new ResponseEntity<byte[]>(by, headers, HttpStatus.CREATED);
} catch (Exception e) {
e.printStackTrace();
try {
request.getRequestDispatcher("/error/404.jsp").forward(request, response);
} catch (ServletException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
return re;
}

上传文件:

1在spring-mvc中配置


<!--4.文件上传 配置 file upload -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding">
<value>UTF-8</value>
</property>
<property name="maxUploadSize">
<value>1048576000</value>
</property>
<property name="maxInMemorySize">
<value>40960</value>
</property>
</bean>

在controller中代码如下


@RequestMapping(value="/upload", method = RequestMethod.POST)
@ResponseBody
public Json upload(Doc doc, @RequestParam("uploadFile") CommonsMultipartFile file) {
Json j = new Json();
try {
String realpath = this.servletContext.getRealPath("/upload"); 
String uploadFileFileName = file.getOriginalFilename(); 
String uploadFileFileNameWithoutSpace = uploadFileFileName.replaceAll(" ", ""); 
String fileType = uploadFileFileNameWithoutSpace.substring(uploadFileFileNameWithoutSpace.lastIndexOf("."));
File targetFile = new File(realpath+File.separator, uploadFileFileNameWithoutSpace);
if (targetFile.exists()) {
targetFile.delete();
}
file.getFileItem().write(targetFile); 
docService.upload(doc,uploadFileFileNameWithoutSpace);
j.setSuccess(true);
j.setMsg("Upload manual successfully");
}catch (Exception e) {
logger.error(ExceptionUtil.getExceptionMessage(e));
j.setMsg("Upload manual unsuccessfully");
}
return j;
}

以上所述是小编给大家介绍的Java Spring MVC 上传下载文件配置及controller方法详解,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对PHPERZ网站的支持!



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