(一)文件的上传:在这一部分,我要将execl文件的内容上传到数据库中,完成这一功能。需要分为两步:

1:将文件上传到tomcat下

文件格式如下:

java 通过文件上传apk 后缀的文件 java实现文件上传下载_sql

2:读取execl表中的内容到数据库中

首先:下载jar包:

commons-fileupload-1.3.2.jar
commons-io-2.5.jar

前台html和js:

1   <input type="hidden" readonly name="src" id="fsrc" value="0" size="60"/>
2      <input type='text' readonly name='textfield' id='textfield' class='txt'  style="height:30px;width:30%;"/>  
3      <input type='button' class='btn' onClick="findFile()" value='浏览...' style="height:30px;background-color:#ff9900;outline:none;border:none;width:10%;" />
4      <input type="file" name="file" class="file" id="file" size="28"  style="display:none;" onchange="document.getElementById('textfield').value=this.value" />
5      <input type="button" class="btn2" value="上传" onclick="upload()"/>
6      <a  class="btn btn-success"  href="lmxx.do?downLoad&fileName='栏目列表.xls'">下载</a>
1 function upload(){
 2     
 3     var file="file";
 4     var picElement=document.getElementById(file).value;
 5     
 6     var picFormat=picElement.substring(picElement.lastIndexOf('.')+1,picElement.length);
 7     if(picFormat!="xls"&&picFormat!="xlsx"){
 8         alert("请选择 excel 2003 (*.xls) 格式的文件!");
 9         return;
10     }
11 
12     $.ajaxFileUpload({
13              url:"lmxx.do?upLoadExcel",
14            secureuri: false,
15            fileElementId:file,
16            dataType: 'JSON',
17            success:function(data){
18                   data=decodeURIComponent(data);//解码
19                   var arr=JSON.parse(data);//JSON.parse() 方法解析一个JSON字符串            
20                 $("#fsrc").val(arr.rPath);         
21                 $.post(
22                         "lmxx.do?excelToDb&src="+$("#fsrc").val(),    
23                         function(data){
24                             //data=decodeURIComponent(data);
25                             //var arr=JSON.parse(data);
26                             if(data==1){
27                             alert("上传成功!");
28                             }else{
29                             alert("上传失败!");
30                             }
31 
32                         }
33                     );
34         },
35         error: function (){
36                alert("上传失败!当前时间为:"+new Date().toLocaleTimeString());
37           
38        }
39     });
40 };
41 
42 function findFile(){
43     document.getElementById("file").click();
44 }

后台操作方法:

1 @RequestMapping(params="upLoadExcel") 
 2     @ResponseBody
 3     public String addFilemsgPic(MultipartFile file,HttpServletRequest request) throws Exception{
 4         String path="/uploadExcelFiles";
 5         path=request.getSession().getServletContext().getRealPath(path);//当前运行文件在服务器上的绝对路径
 6         System.out.println(path);
 7         //创建文件 
 8         File dir=new File(path);
 9         if(!dir.exists()){
10             dir.mkdirs();
11         }
12         String uuid=UUID.randomUUID().toString();
13         //返回原来在客户端的文件系统的文件名
14         String fileName=file.getOriginalFilename();
15         //uuid+后缀名
16         String img=uuid+fileName.substring(fileName.lastIndexOf("."));//lastIndexOf报告指定 Unicode 字符在此实例中的最后一个匹配项的索引位置(即为后缀)。String.Substring (Int32)从此实例检索子字符串
17         FileOutputStream imgOut=new FileOutputStream(new File(dir,img));//根据 dir 抽象路径名和 img 路径名字符串创建一个新 File 实例。
18         imgOut.write(file.getBytes());//返回一个字节数组文件的内容
19         imgOut.close();
20         Map<String, String> map=new HashMap<String, String>();
21     
22         map.put("picPath",img);//8b4aff41-420c-419a-b0ab-c18ca36198c6.xls
23         map.put("picName",fileName);//lanmu.xls
24         String rpath = path+"\\"+img;
25     
26         map.put("rPath",rpath);
27         JSONObject jsonObject = JSONObject.fromObject(map);//将json字符串转换为json对象
28         String r=jsonObject.toString();
29         String s=URLEncoder.encode(r, "utf-8");//加密
30         return s;
31     }
32     
33     
34     @RequestMapping(params="excelToDb") 
35     @ResponseBody
36     public int excelToDB(String src){
37     
38        
39         String newSrc = src.replace(" ", "+");
40         List<Lanmu> lmList=ReadeExcel.taPCL(newSrc);
41         int flag=ConnOrcl.connToTable(lmList);
42         if(flag==1)
43             return 1;
44         else
45             return 2;
46     }
ReadeExcel
1 public class ReadeExcel {
 2     public static List<Lanmu> taPCL(String file)  
 3     {     
 4         List<Lanmu> LTPC = new ArrayList<Lanmu>();        
 5         try  
 6         {                                           
 7             //选取excel文件         
 8             Workbook rwb=Workbook.getWorkbook(new File(file));//获得工作薄(Workbook)          
 9             //选取excel文件中的第一个工作薄  
10             Sheet sheet = rwb.getSheet(0);  
11             //得到excel表行数  
12             int RowNum = sheet.getRows();            
13             for(int i=1;i<RowNum;i++)  
14             {  
15                 //获得excel表中第1列第i行单元格  
16                 Cell cell0 = sheet.getCell(0, i);  
17                 //获得excel表中第2列第i行单元格  
18                 Cell cell1 = sheet.getCell(1, i);  
19                 //获得cell0单元格内容  
20                 String name = cell0.getContents();  
21                 //获得cell1单元格内容  
22                 String state = cell1.getContents();                   
23                 Lanmu lanmu = new Lanmu();  
24                 lanmu.setName(name);
25                 lanmu.setState(state);             
26                 LTPC.add(lanmu);  
27             }  
28         }  
29         catch(Exception e)  
30         {  
31             e.printStackTrace();  
32         }        
33         return LTPC;  
34     }      
35 }
ConnOrcl
1 public class ConnOrcl {
 2     
 3         private static Connection conn;  
 4         private static Statement stat;  
 5         private static String driver = "oracle.jdbc.driver.OracleDriver";  
 6         private static int SUCCESS=1; 
 7         private static int FILE=2; 
 8         public static int connToTable(List<Lanmu> lanmus)  
 9         {  
10             try  
11             {  
12                 //数据库连接  
13                 Class.forName(driver);  
14                 conn = java.sql.DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl", "GKBMFZXT", "GKBMFZXT");  
15                 stat = conn.createStatement();  
16                  int flag=0;
17                 //遍历list,插入数据库  
18                 for(Lanmu lanmu : lanmus)  
19                 {  
20                     StringBuffer sql = new StringBuffer();             
21                     //构造sql语句  
22                     sql.append("insert into lanmu_table (id,name,state) values ('");  
23                     String id=UUID.randomUUID().toString().replace("-","");
24                     String name = lanmu.getName(); 
25                     String state = lanmu.getState();                    
26                     sql.append(id).append("','");
27                     sql.append(name).append("','");  
28                     sql.append(state).append("')");                        
29                     //执行sql语句  
30                     stat.execute(sql.toString());  
31                     flag++;
32                 }
33                 
34                 if(flag==lanmus.size()){
35                     return SUCCESS;
36                 }
37             }  
38             catch(ClassNotFoundException e)  
39             {  
40                 e.printStackTrace();  
41             }  
42             catch(SQLException e)  
43             {  
44                 e.printStackTrace();  
45             }  
46             finally  
47             {  
48                 if(null != stat)  
49                 {  
50                     try   
51                     {  
52                         stat.close();  
53                     }   
54                     catch (SQLException e)  
55                     {  
56                         e.printStackTrace();  
57                     }  
58                 }  
59                 if(null != conn)  
60                 {  
61                     try   
62                     {  
63                         conn.close();  
64                     }   
65                     catch (SQLException e)   
66                     {  
67                         e.printStackTrace();  
68                     }  
69                 }  
70             }  
71             return FILE;
72         }  
73 
74 }
(二)文件的下载
1 @RequestMapping(params="downLoad") 
 2     public String downLoad(HttpServletRequest request,HttpServletResponse response)throws Exception{
 3         
 4         
 5         String fileName=request.getParameter("fileName");
 6         File f=new File("C:\\Users\\ztl\\Desktop\\lanmu.xls");
 7     
 8         BufferedInputStream buffer=null;
 9         OutputStream out=null;
10     try{
11         if(!f.exists()){
12     
13             response.sendError(404,"File not find!");
14             return "File not find!";
15     
16         }
17         buffer = new BufferedInputStream(new FileInputStream(f));
18         byte[] buf = new byte[1024];
19         int len=0;
20         response.reset();      
21         response.setContentType("application/vnd.ms-excel");        
22         response.setHeader("Content-Disposition","attachment;filename="+fileName);
23         out = response.getOutputStream();
24         while((len = buffer.read(buf))>0){
25             out.write(buf,0,len);
26         }
27         out.flush();
28         response.flushBuffer();
29             
30     }catch(Throwable e){
31         e.printStackTrace();
32     }finally{
33         
34         if(out!=null){
35             out.close();
36         }
37     }
38     
39     return "view/luntan/lanmu_list";
40         
41     }
42