springMVC 文件上传(upload)

 
	
  
   2.4
  
	
  
   1.2.1
  

 

 
	
   
   
    commons-fileupload
    
   
    commons-fileupload
    
   
    ${fileupload.version}
    
  
	
   
   
    commons-io
    
   
    commons-io
    
   
    ${commons.io.version}
    
  
 
 

package com.amiu.java_config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{

	@Override
	protected Class
 [] getRootConfigClasses() {
		// TODO Auto-generated method stub
		return new Class[]{MvcConfig.class};
	}

	@Override
	protected Class
 [] getServletConfigClasses() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	protected String[] getServletMappings() {
		// TODO Auto-generated method stub
		return new String[]{"/"};
	}
	
}

package com.amiu.java_config;

import java.io.IOException;

import org.apache.log4j.Logger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.FileSystemResource;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
@EnableWebMvc
@ComponentScan("com.amiu")
public class MvcConfig extends WebMvcConfigurerAdapter{

	private static final Logger logger = Logger.getLogger(MvcConfig.class);
	
	@Bean
	public MultipartResolver multipartResolver() {
		CommonsMultipartResolver commonsMultipart = new CommonsMultipartResolver();
		commonsMultipart.setDefaultEncoding("UTF-8");//设置字符编码
		//commonsMultipart.setMaxUploadSizePerFile(5*1024*1024);//单个文件最大上传限制
		commonsMultipart.setMaxUploadSize(20*1024*1024);//设置最大上传大小
		try {
			//设置临时路径
			commonsMultipart.setUploadTempDir(new FileSystemResource("/tempImg"));
		} catch (IOException e) {
			logger.error(e.getMessage());
			e.printStackTrace();
		}
		return commonsMultipart;
	}

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
	
}

package com.amiu.upload;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.annotation.PostConstruct;

import org.apache.log4j.Logger;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

@RestController
public class ImgController {
	private static final Logger logger = Logger.getLogger(ImgController.class);
	//上传最大限制
	private long UPLOAD_FILE_MAX_SIZE = 5*1024*1024;
	private List
 
   SUPPORT_IAMGE_SUFFIXList;
	//被@PostConstruct修饰的方法会在服务器加载Servlet的时候运行，
	//并且只会被服务器调用一次，类似于Serclet的inti()方法
	@PostConstruct
	void init(){
		SUPPORT_IAMGE_SUFFIXList = 
				new ArrayList
  
   (); SUPPORT_IAMGE_SUFFIXList.add("jpg"); SUPPORT_IAMGE_SUFFIXList.add("png"); SUPPORT_IAMGE_SUFFIXList.add("jpeg"); SUPPORT_IAMGE_SUFFIXList.add("pdf"); } @RequestMapping(value = "/img") public String uploadPic(MultipartHttpServletRequest request) { System.out.println("in imageUpload"); //只获取image MultipartFile image = request.getFile("image"); if(image == null) return "choice file please"; if(image.getSize() > UPLOAD_FILE_MAX_SIZE) return "file to big,it must smaller than 5M"; String orgFileName = image.getOriginalFilename(); //文件格式后缀 String fileSuffix = orgFileName.substring(orgFileName.indexOf('.')+1).toLowerCase(); //判断文件格式 if(!SUPPORT_IAMGE_SUFFIXList.contains(fileSuffix)) return "unsupport file format"; String path = "E:/image/"; String fileName = new Date().getTime()+fileSuffix; File localFile = new File(path+fileName); try { //spring提供的上传方法 image.transferTo(localFile); } catch (IllegalStateException | IOException e) { logger.error(e.getMessage()); System.out.println(e.getMessage()); e.printStackTrace(); } return "success: "+fileName; } }