SpringMvc文件上传

package cn.jingbang.controller;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

/**
 * 为了实现文件上传的多种方式
 * @author FangQiang
 * @Date 2017/11/16
 */
@Controller
public class UploadController {
    
    @RequestMapping("/up.do")
    public String up() {
        return "/upfile.jsp";
    }
    
    @RequestMapping("/fileUpload1.do")
    @ResponseBody                
    public String fileUpload(@RequestParam("file") CommonsMultipartFile file,HttpServletRequest request) throws IOException {
        String path = request.getSession().getServletContext().getRealPath("/")+"upload/"+file.getOriginalFilename();
        System.out.println(path);
        //这里使用默认的缓冲输出流
        OutputStream os = new BufferedOutputStream(new FileOutputStream(path));
        // 这里给字节流加了缓冲
        InputStream inputStream = file.getInputStream();
        byte[] b = new byte[1024];
        int i;
        while(inputStream.read(b) != -1) {
            os.write(b);
        }
        inputStream.close();
        os.close();
        //ajax返还json
        return "{\"success\":true}";
    }
    
    @RequestMapping("fileUpload2")
    @ResponseBody
    public String fileUpload(@RequestParam("file") MultipartFile file,HttpServletRequest request) throws Exception, IOException {
        String path = request.getSession().getServletContext().getRealPath("/")+"upload/"+file.getOriginalFilename();
        File newFile = new File(path);
        file.transferTo(newFile);
        return "{\"success\":true}";
    }
    
    @RequestMapping("springUpload")
    @ResponseBody
    public String  springUpload(HttpServletRequest request) throws IllegalStateException, IOException {
        CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());
        //如果是多部件上传
        if(resolver.isMultipart(request)) {
            MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;
            //得到所有的fileNames
            Iterator<String> iter = req.getFileNames();
            while(iter.hasNext()) {
                MultipartFile file = req.getFile(iter.next().toString());
                if(file != null) {
                    String path = request.getSession().getServletContext()
                            .getRealPath("/")+"upload/"+file.getOriginalFilename(); 
                    file.transferTo(new File(path));
                }
            }
        }
        return "{\"success\":true}";
    }
}

 

package cn.jingbang.controller;
import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Iterator;import javax.servlet.http.HttpServletRequest;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartFile;import org.springframework.web.multipart.commons.CommonsMultipartResolver;
/** * 为了实现文件上传的多种方式 * @author FangQiang * @Date 2017/11/16 */@Controllerpublic class UploadController {@RequestMapping("/up.do")public String up() {return "/upfile.jsp";}@RequestMapping("/fileUpload1.do")@ResponseBodypublic String fileUpload(@RequestParam("file") CommonsMultipartFile file,HttpServletRequest request) throws IOException {String path = request.getSession().getServletContext().getRealPath("/")+"upload/"+file.getOriginalFilename();System.out.println(path);//这里使用默认的缓冲输出流OutputStream os = new BufferedOutputStream(new FileOutputStream(path));// 这里给字节流加了缓冲InputStream inputStream = file.getInputStream();byte[] b = new byte[1024];int i;while(inputStream.read(b) != -1) {os.write(b);}inputStream.close();os.close();//ajax返还jsonreturn "{\"success\":true}";}@RequestMapping("fileUpload2")@ResponseBodypublic String fileUpload(@RequestParam("file") MultipartFile file,HttpServletRequest request) throws Exception, IOException {String path = request.getSession().getServletContext().getRealPath("/")+"upload/"+file.getOriginalFilename();File newFile = new File(path);file.transferTo(newFile);return "{\"success\":true}";}@RequestMapping("springUpload")@ResponseBodypublic String  springUpload(HttpServletRequest request) throws IllegalStateException, IOException {CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());//如果是多部件上传if(resolver.isMultipart(request)) {MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;//得到所有的fileNamesIterator<String> iter = req.getFileNames();while(iter.hasNext()) {MultipartFile file = req.getFile(iter.next().toString());if(file != null) {String path = request.getSession().getServletContext().getRealPath("/")+"upload/"+file.getOriginalFilename(); file.transferTo(new File(path));}}}return "{\"success\":true}";}}