重炉后-文件上传下载
1.在springmvc.xml配置和文件中要加上
1 <!-- 文件上传 富媒体解析器--> 2 <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>" + " <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="width: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; } }
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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）
