重炉后-文件上传下载

1.在springmvc.xml配置和文件中要加上

  <!-- 文件上传  富媒体解析器-->               
   <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>     

1.springmvc.xml代码如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-3.2.xsd
                        http://www.springframework.org/schema/aop 
                        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd    
                        
                        
                        ">

    <!-- 扫描mvc -->
    <context:component-scan base-package="com.bypx.controller" />
    <aop:aspectj-autoproxy proxy-target-class="true" />
    <!-- 开启mvc注解功能 -->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=UTF-8</value>
                        <value>text/plain;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
            
        </mvc:message-converters>
    </mvc:annotation-driven>
    <!-- 视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀 -->
        <property name="prefix" value="" />
        <!--后缀 -->
        <property name="suffix" value="" />
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
    </bean>

     <!-- 文件上传  富媒体解析器-->               
   <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>        


</beans>

2.在jsp页面的上传是一个按钮，然后按钮调用弹窗，在弹窗里面进行上传

2.1这个是js代码，数据表格是在页面刷新后自动执行的，把文件上传放在一个弹窗里面是因为，如果单独一个按钮上传，他会提示说没有选择图片，而且这个弹窗里面还有2个隐藏的Input来接收前台传进来的2个id，把值赋值给隐藏Input框，然后再拿出来传到后台，这样就可以获取到uuid，进行文件上传所需要的主键了（PS:传uuid一直显示unfind的话，要记得在uuid两边再加上双引号并要用转义符，因为有可能uuid自动生成里面会有特殊字符所以要再加上双引号）

$(function(){
    $('#sjb_div').datagrid({   
        title:"文件管理",
        url:'../../UploadController/cakan.do',    
        pagination:true,
        toolbar:"#gongjulan",
        columns:[[    
                  {field:'up_uuid',title:'文件编号',align:'center'},    
                  {field:'us_name',title:'用户名',align:'center'},    
                  {field:'us_phone',title:'联系方式',align:'center'},    
                  {field:'up_name',title:'文件名',align:'center'},    
                  {field:'wjus_srid',title:'用户id',align:'center'},    
                  {field:'up_type',title:'文件分类',align:'center',formatter: function(value,row,index){
                      if (value==0){
                          return "加工文件";
                      } else if(value==1){
                          return "订单文件";
                      }
                  }
                  },    
                  {field:"up_shangchuan",title:'文件',align:'center',formatter: function(value,row,index){
                      if (row.up_name==null||row.up_name==""){
                          return "<a onclick='wjshangchuan(""+row.wjus_srid+"",""+row.up_uuid+"")' class='easyui-linkbutton' data-options='iconCls:'icon-add' style='color:blue'  ><u>上传</u></a>";
                      } else {
                          return "<a onclick='wjshangchuan(""+row.wjus_srid+"",""+row.up_uuid+"")' class='easyui-linkbutton' data-options='iconCls:'icon-add' style='color:blue'  ><u>替换</u></a>" +
                          "&nbsp;&nbsp; <a href='../../FileController/download.do?fileName="+row.up_name+"' onclick=wjxiazai(""+row.up_name+"")>下载</a>";
                      }
                  }
                  },
                  ]]
    }); 
});

2.2点击上传后调用的方法（把获取到的2个主键分别存到2个隐藏的input里面）把弹窗打开：

//文件上传按钮static-----------------------------------------------------------------------------
function wjshangchuan(uuid,up_ud){
    document.getElementById("us_yingchang_input").value=uuid;//把值赋给隐藏input
    document.getElementById("up_yingchang_input").value=up_ud;//把值赋给隐藏input
    $('#wjshangchuan_div').dialog('open');    
}
//文件上传按钮end-----------------------------------------------------------------------------

2.3这个是弹窗（弹窗里面有2个隐藏input框用来接收值）

<!-- 文件下载start--------------------------------------------------- -->
    <div id="wjshangchuan_div" class="easyui-dialog" title="上传"
        style="400px;height:200px; top:150px"
        data-options="iconCls:'icon-save',resizable:true,modal:true,closed:true">
        <form id="upload_form" method="post" enctype="multipart/form-data">
            <input typx="text" id="us_yingchang_input" type="hidden"> <input
                typx="text" id="up_yingchang_input" type="hidden"> <input
                type="file" name="uploadfile" /> <input type="button"
                onclick="wj_shangchuan()" value="上传" />
        </form>
    </div>
    <!-- 文件下载end--------------------------------------------------- -->

2.4这个是上传文件的js（先拿到隐藏input框里面的值，然后把跟路径一起传到后台去）

//文件上传static-----------------------------------------------------------------------------
function wj_shangchuan(){
    var zhi= $("#us_yingchang_input").val();//获取隐藏input值
    var up_uuid= $("#up_yingchang_input").val();//获取隐藏input值
    var attname;
    var path;
    var formData = new FormData($("#upload_form")[0]);
    $.ajax({
        url: '../../FileController/uploadFileCustmer.do?type=0&&uuid='+zhi+'&&up_uuid='+up_uuid,
        type: 'POST',
        data: formData,
        async: false,
        contentType: false,
        processData: false,
        dataType: "json",
        success: function (returndata) {
            path = returndata.path;
            attname = returndata.oname;
            if(path==null||attname==null){
                $.messager.alert('警告','请选择要上传的文件'); 
            }else{
                $.messager.alert('提示','附件上传成功!!!'); 
            }
            $('#sjb_div').datagrid('reload');  //重载数据表
            $("#wjshangchuan_div").dialog('close');//关闭弹窗
        },
        error: function (returndata) {

        }
    });
}
//文件上传end-----------------------------------------------------------------------------

2.5图片展示：

 

2.6弹窗里面的<form>表单要注意，文件上传的name，要和等等接下来的Controoler里面的 multipartResolver 对象的名字要一样，不然会找不到我们选择的文件，这个要注意

<!-- 文件下载start--------------------------------------------------- -->

<form id="upload_form" method="post" enctype="multipart/form-data">
   <input type="file" name="uploadfile" />
   <input type="button" onclick="wj_shangchuan()" value="上传" />
        </form>
    </div>
    <!-- 文件下载end--------------------------------------------------- -->

2.7：补2.6的图

3.FileController

package com.bypx.controller;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import javax.activation.FileTypeMap;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
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.commons.CommonsMultipartFile;

import com.bypx.page.UploadPage;
import com.bypx.page.UserPage;
import com.bypx.util.DateEasy;
import com.bypx.util.DeleteFileUtil;
import com.bypx.util.EnvironmentUtil;
import com.bypx.util.JsonUtil;
import com.bypx.util.KeyGenerate;
import com.bypx.util.StringUtil;

@Controller
@RequestMapping("FileController")
public class FileController {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    @RequestMapping("uploadFileCustmer")
    @ResponseBody
    public String uploadFileCustmer(HttpServletRequest request,MultipartFile uploadfile, HttpSession session,UserPage page,UploadPage up_page) throws IOException {
        // 1获得上传的文件内容
        byte[] bytes = uploadfile.getBytes();
        System.out.println(bytes+"..................47");
        // 2获得upload的绝对路径
        String path =EnvironmentUtil.getInstance().getAppPath()+"upload/";
        String path2="upload/";
        System.out.println(path+"-----------------45-----path");
        System.out.println(uploadfile.getOriginalFilename()+"-------49------");
        // 3在服务器的upload目录下创建File对象

        if (uploadfile.getOriginalFilename() != "" && uploadfile.getOriginalFilename() != null) {
            String time = new DateEasy().toYYYYMMDDHHMMSS();// 加随机数，防止重复
            System.out.println(time+"----------54-------");
            String extname="";
            if(uploadfile.getOriginalFilename().indexOf(".")!=-1){
                extname=uploadfile.getOriginalFilename();
            }
            String oname = time+"_" +extname;  // 上传文件的原始名字
            System.out.println(oname+"..........60..........");
            File file = new File(path, oname);
            System.out.println(file+".......62.........");
            // 4将上传的文件拷贝到指定的目录
            try {
                FileUtils.writeByteArrayToFile(file, bytes);
            } catch (IOException e) {
                e.printStackTrace();
            }
            Map<String, String> mm = new HashMap<String, String>();
            mm.put("path", "upload/");
            mm.put("oname", oname);
            String wuuidString=request.getParameter("uuid");
            System.out.println(wuuidString+"+++++.....74");
            System.out.println(oname+"............................");
//            String sql="INSERT INTO sk_upload(UUID,up_name,up_path,TYPE,SRID) VALUE(?,?,?,?,?)";
//          jdbcTemplate.update(sql,KeyGenerate.getKey(),oname,path2,request.getParameter("type"),request.getParameter("uuid"));
            String sql="UPDATE sk_upload SET up_name=?,up_path=?,TYPE=?,SRID=? WHERE UUID=? ";
            jdbcTemplate.update(sql,oname,path2,request.getParameter("type"),request.getParameter("uuid"),request.getParameter("up_uuid"));
            System.out.println(oname+"............81");
            System.out.println(path2+"............82");
            System.out.println(request.getParameter("type")+"............83");
            System.out.println(request.getParameter("uuid")+"............84");
            System.out.println(request.getParameter("up_uuid")+"............86");
            System.out.println(sql+"++++++++++++++++++++++++++");
            System.out.println(mm+"........75...............");
            return JsonUtil.toJson(mm);
        } else {
            Map<String, String> mm2 = new HashMap<String, String>();
            mm2.put("path", null);
            mm2.put("oname", null);
            return JsonUtil.toJson(mm2);
        }
    }

    @RequestMapping("uploadFile")
    @ResponseBody
    public String uploadFile(HttpServletRequest request, @RequestParam("uploadfile") CommonsMultipartFile uploadfile, HttpSession session) throws IOException {
        // 1获得上传的文件内容
        byte[] bytes = uploadfile.getBytes();
        // 2获得upload的绝对路径
        String path = "upload/";
        // 3在服务器的upload目录下创建File对象

        if (uploadfile.getOriginalFilename() != "" && uploadfile.getOriginalFilename() != null) {
            String time = new DateEasy().toYYYYMMDDHHMMSS();// 加随机数，防止重复
            String extname="";
            if(uploadfile.getOriginalFilename().indexOf(".")!=-1){
                extname=uploadfile.getOriginalFilename().substring(uploadfile.getOriginalFilename().lastIndexOf("."));
            }
            String oname = time +extname;  // 上传文件的原始名字
            File file = new File(path, oname);
            // 4将上传的文件拷贝到指定的目录
            try {
                FileUtils.writeByteArrayToFile(file, bytes);
            } catch (IOException e) {
                e.printStackTrace();
            }
            Map<String, String> mm = new HashMap<String, String>();
            mm.put("path", path);
            mm.put("oname", oname);
            String uuid = request.getParameter("uuid");
            Map<String,Object> filepathm=new HashMap<String, Object>();
            //以前有文件就要把以前的文件删除掉
            try{
                String oldpathsql="select photo_path from jxc_yl where uuid=?";
                filepathm=jdbcTemplate.queryForMap(oldpathsql, uuid);
            }catch(Exception e){}
            String filepath=filepathm.get("photo_path")+"";
            //找到以前的路径如果不等于null
            if(!StringUtil.zNull(filepath).equals("")){
                DeleteFileUtil.deleteFile(EnvironmentUtil.getInstance().getAppPath()+filepath);
            }
            return JsonUtil.toJson(mm);
        } else {
            Map<String, String> mm2 = new HashMap<String, String>();
            mm2.put("path", null);
            mm2.put("oname", null);
            return JsonUtil.toJson(mm2);
        }
    }
    @RequestMapping("clearfile")
    @ResponseBody
    public Map<String,Object> clearfile(String uuid,String filepath){
            Map<String,Object> mm=new HashMap<String, Object>();
            if(StringUtil.zNull(filepath).equals("")){
                mm.put("success", "donothing");
                return mm;
            }
            String sql="select count(*) as total from jxc_yl where uuid=?";
            int nn=jdbcTemplate.queryForInt(sql,uuid);
            boolean doo=false;
            if(nn==0){
                System.out.println(EnvironmentUtil.getInstance().getAppPath()+"upload/"+filepath);
                doo=DeleteFileUtil.deleteFile(EnvironmentUtil.getInstance().getAppPath()+"upload/"+filepath);
            }
            
            if(doo==true){
                mm.put("success", "do");
            }else{
                mm.put("success", "donothing");
            }
            return mm;
    }

    /***
     * 实现文件下载
     * 
     * @throws UnsupportedEncodingException
     * ***/
    @RequestMapping("/download")
    public String downloadFile(@RequestParam("fileName") String fileName, HttpServletRequest request, HttpServletResponse response) {
        String path = request.getSession().getServletContext().getRealPath("\upload");
        System.out.println(path+"+++++++++168");
        if (fileName != null) {
            try {
                fileName=java.net.URLDecoder.decode(fileName,"utf-8");
                System.out.println(fileName+"++++++++99999999999");
            } catch (UnsupportedEncodingException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            fileName = path+"\"+fileName;
            System.out.println(fileName+"++++++++99999999999");
            File file = new File(fileName);
            System.out.println(file+"........171");
            System.out.println(file.exists()+".......172");
            if (file.exists()) {
                byte[] buffer = new byte[1024];
                FileInputStream fis = null;
                BufferedInputStream bis = null;
                try {
                    response.setContentType("application/force-download");// 设置强制下载不打开
                    response.addHeader("Content-Disposition", "attachment;fileName=" + new String(fileName.getBytes("gbk"), "iso-8859-1"));// 设置文件名

                    fis = new FileInputStream(file);
                    System.out.println(fis+"--------182");
                    bis = new BufferedInputStream(fis);
                    System.out.println(bis+"--------184");
                    OutputStream os = response.getOutputStream();
                    int i = bis.read(buffer);
                    while (i != -1) {
                        os.write(buffer, 0, i);
                        i = bis.read(buffer);
                    }
                } catch (Exception e) {
                    // TODO: handle exception
                    e.printStackTrace();
                } finally {
                    if (bis != null) {
                        try {
                            bis.close();
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                    if (fis != null) {
                        try {
                            fis.close();
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
        return null;
    }
}

--------------------------------------------------------------------分界线----------------------------------------------------------------------------------------------------------------------------------------------

4.文件下载

文件下载和前面文件上传是差不多了，文件下载的Controller和上传的在一起就不贴图了，就贴一下按钮（文件下载不需要选择，所以只需一个按钮就好，所以就用了herf）