用FileUpload做得文件上传

Html代码

1. 
   
   
   
   
   <
   
   
   form
   
   
   
   
    
   
   
   
   id
   
   
   
   =
   
   
   
   'myform'
   
   
   
    
   
   
   
   enctype
   
   
   
   =
   
   
   
   "multipart/form-data"
   
   
   
    
   
   
   
   action
   
   
   
   =
   
   
   
   "<%=webapp %>/UploadFileServlet"
   
   
   
     
   
   
   


2. 
   
    
   
   
   
   method
   
   
   
   =
   
   
   
   "post"
   
   
   
    
   
   
   
   target
   
   
   
   =
   
   
   
   "hidden_frame"
   
   
   
   
   
   >
   
   
   
   
     
   
   


3. 
   
   
   
   <
   
   
   input
   
   
   
   
    
   
   
   
   type
   
   
   
   =
   
   
   
   "file"
   
   
   
    
   
   
   
   name
   
   
   
   =
   
   
   
   "file"
   
   
   
    
   
   
   
   id
   
   
   
   =
   
   
   
   "file"
   
   
   
    
   
   
   
   size
   
   
   
   =
   
   
   
   "10"
   
   
   
    
   
   
   
   onchange
   
   
   
   =
   
   
   
   "this.form.submit();"
   
   
   
    
   
   
   
   
   />
   
   
   
   
     
   
   


4. 
   
   
   
   <
   
   
   iframe
   
   
   
   
    
   
   
   
   name
   
   
   
   =
   
   
   
   'hidden_frame'
   
   
   
    
   
   
   
   id
   
   
   
   =
   
   
   
   "hidden_frame"
   
   
   
    
   
   
   
   style
   
   
   
   =
   
   
   
   'display:none'
   
   
   
   
   
   >
   
   
   
   
   iframe
   
   
   >
   
   
   
   
     
   
   


5. 
   
   
   
   
   
   form
   
   
   >
   
   
   
   
     
   
   

/UploadFileServlet"
 method="post" target="hidden_frame">

webapp是项目的路径名

String webapp=request.getContextPath();

后台代码:

Java代码

1. 
   
   
   
   
   import
   
   
   
   
    java.io.File;   
   
   
   


2. 
   
   
   
   import
   
   
   
   
    java.io.IOException;   
   
   


3. 
   
   
   
   import
   
   
   
   
    java.io.PrintWriter;   
   
   


4. 
   
   
   
   import
   
   
   
   
    java.util.ArrayList;   
   
   


5. 
   
   
   
   import
   
   
   
   
    java.util.HashMap;   
   
   


6. 
   
   
   
   import
   
   
   
   
    java.util.List;   
   
   


7. 
   
   
   
   import
   
   
   
   
    java.util.Map;   
   
   


8. 
   
     
   
   


9. 
   
   
   
   import
   
   
   
   
    javax.servlet.ServletException;   
   
   


10. 
    
    
    
    import
    
    
    
    
     javax.servlet.http.HttpServletRequest;   
    
    


11. 
    
    
    
    import
    
    
    
    
     javax.servlet.http.HttpServletResponse;   
    
    


12. 
    
      
    
    


13. 
    
    
    
    import
    
    
    
    
     org.apache.commons.fileupload.FileItem;   
    
    


14. 
    
    
    
    import
    
    
    
    
     org.apache.commons.fileupload.disk.DiskFileItemFactory;   
    
    


15. 
    
    
    
    import
    
    
    
    
     org.apache.commons.fileupload.servlet.ServletFileUpload;   
    
    


16. 
    
    
    
    import
    
    
    
    
     org.apache.log4j.Logger;   
    
    


17. 
    
      
    
    


18. 
    
    
    
    import
    
    
    
    
     com.siyue.ciap.beans.dic.EnvBean;   
    
    


19. 
    
    
    
    import
    
    
    
    
     com.siyue.ciap.dao.cms.UUIDGenerator;   
    
    


20. 
    
    
    
    import
    
    
    
    
     com.siyue.ciap.dao.phone.ReadFileUtil;   
    
    


21. 
    
    
    
    import
    
    
    
    
     com.siyue.ciap.dao.uitls.ObjectToJSON;   
    
    


22. 
    
    
    
    import
    
    
    
    
     com.siyue.ciap.service.uitl.SpringFacesUtil;   
    
    


23. 
    
      
    
    


24. 
    
      
    
    


25. 
    
    
    
    public
    
    
    
    
     
    
    
    
    
    class
    
    
    
    
     UploadFileServlet 
    
    
    
    
    extends
    
    
    
    
     javax.servlet.http.HttpServlet 
    
    
    
    
    implements
    
    
    
    
     javax.servlet.Servlet {   
    
    


26. 
    
      
    
    


27. 
    
        
    
    
    
    
    private
    
    
    
    
     
    
    
    
    
    static
    
    
    
    
     
    
    
    
    
    final
    
    
    
    
     Logger logger = Logger.getLogger(UploadFileServlet.
    
    
    
    
    class
    
    
    
    
    );   
    
    


28. 
    
           
    
    


29. 
    
        
    
    
    
    
    protected
    
    
    
    
     
    
    
    
    
    void
    
    
    
    
     doGet(HttpServletRequest request, HttpServletResponse response)   
    
    


30. 
    
                
    
    
    
    
    throws
    
    
    
    
     ServletException, IOException {   
    
    


31. 
    
            
    
    
    
    
    this
    
    
    
    
    .doPost(request, response);   
    
    


32. 
    
        }   
    
    


33. 
    
      
    
    


34. 
    
        
    
    
    
    
    protected
    
    
    
    
     
    
    
    
    
    void
    
    
    
    
     doPost(HttpServletRequest request, HttpServletResponse response)   
    
    


35. 
    
                
    
    
    
    
    throws
    
    
    
    
     ServletException, IOException {   
    
    


36. 
    
            System.out.println(
    
    
    
    "execute Upload File................."
    
    
    
    );   
    
    


37. 
    
            PrintWriter out = response.getWriter();   
    
    


38. 
    
            EnvBean envBean =(EnvBean)SpringFacesUtil   
    
    


39. 
    
                   .getBean(
    
    
    
    
    this
    
    
    
    
    .getServletContext(), 
    
    
    
    "EnvBean"
    
    
    
    );   
    
    


40. 
    
            String uploadPath = envBean.getEnv().getProperty(
    
    
    
    "upload_dest"
    
    
    
    );
    
    
    
    //上传的路径
    
    
    
      
    
    


41. 
    
            UUIDGenerator generator=
    
    
    
    
    new
    
    
    
    
     UUIDGenerator();   
    
    


42. 
    
            DiskFileItemFactory factory = 
    
    
    
    
    new
    
    
    
    
     DiskFileItemFactory();   
    
    


43. 
    
            factory.setSizeThreshold(
    
    
    
    4096
    
    
    
    );
    
    
    
    //设置缓冲
    
    
    
      
    
    


44. 
    
            factory.setRepository(
    
    
    
    
    new
    
    
    
    
     File(uploadPath));
    
    
    
    //设置缓冲区目录
    
    
    
      
    
    


45. 
    
            ServletFileUpload upload = 
    
    
    
    
    new
    
    
    
    
     ServletFileUpload(factory);   
    
    


46. 
    
            
    
    
    
    
    boolean
    
    
    
    
     isMultipart = ServletFileUpload.isMultipartContent(request);   
    
    


47. 
    
            upload.setSizeMax(
    
    
    
    1024000000
    
    
    
    );   
    
    


48. 
    
            List items = 
    
    
    
    
    new
    
    
    
    
     ArrayList();   
    
    


49. 
    
            
    
    
    
    
    try
    
    
    
    
     {   
    
    


50. 
    
                items = upload.parseRequest(request);   
    
    


51. 
    
                Map rtnMap = 
    
    
    
    
    new
    
    
    
    
     HashMap();   
    
    


52. 
    
                
    
    
    
    
    for
    
    
    
    
    (
    
    
    
    
    int
    
    
    
    
     i=
    
    
    
    0
    
    
    
    ;i
    


53. 
    
                    FileItem item = (FileItem) items.get(i);   
    
    


54. 
    
                    String autoFileName = generator.generate().toString();   
    
    


55. 
    
                    
    
    
    
    
    if
    
    
    
    
    (
    
    
    
    ""
    
    
    
    .equals(item.getName()))
    
    
    
    
    continue
    
    
    
    
    ;   
    
    


56. 
    
                    
    
    
    
    //获得文件名
    
    
    
      
    
    


57. 
    
                    String fileName = item.getName().substring(item.getName()   
    
    


58. 
    
                                   .lastIndexOf(
    
    
    
    "\\"
    
    
    
    )+
    
    
    
    1
    
    
    
    , item.getName().length());   
    
    


59. 
    
                    
    
    
    
    //获得文件后缀名
    
    
    
      
    
    


60. 
    
                    String extName = fileName   
    
    


61. 
    
                                   .substring(fileName.lastIndexOf(
    
    
    
    "."
    
    
    
    )+
    
    
    
    1
    
    
    
    , fileName.length());   
    
    


62. 
    
                    
    
    
    
    //判断文件类型
    
    
    
      
    
    


63. 
    
                    
    
    
    
    
    if
    
    
    
    
    (!(
    
    
    
    "xls"
    
    
    
    .equalsIgnoreCase(extName) || 
    
    
    
    "txt"
    
    
    
    .equalsIgnoreCase(extName) ||    
    
    


64. 
    
                            
    
    
    
    "csv"
    
    
    
    .equalsIgnoreCase(extName))) {   
    
    


65. 
    
                        out.print(
    
    
    
    ""
    
    
    
    );   
    
    


66. 
    
                        out.close();   
    
    


67. 
    
                    }
    
    
    
    
    else
    
    
    
    
     {   
    
    


68. 
    
                        String fileOnlyName = uploadPath + autoFileName + 
    
    
    
    "."
    
    
    
     + extName;   
    
    


69. 
    
                        item.write(
    
    
    
    
    new
    
    
    
    
     File(fileOnlyName));   
    
    


70. 
    
                        Map excelMap = 
    
    
    
    
    null
    
    
    
    
    ;   
    
    


71. 
    
                        
    
    
    
    
    if
    
    
    
    
    (
    
    
    
    "xls"
    
    
    
    .equalsIgnoreCase(extName)) {   
    
    


72. 
    
                            System.out.println(
    
    
    
    "fileOnlyName------>"
    
    
    
    +fileOnlyName);   
    
    


73. 
    
                            excelMap = ReadFileUtil.readSheetName(fileOnlyName);   
    
    


74. 
    
                        }   
    
    


75. 
    
                        rtnMap.put(
    
    
    
    "file"
    
    
    
    , fileOnlyName);   
    
    


76. 
    
                        rtnMap.put(
    
    
    
    "sheet"
    
    
    
    , excelMap);   
    
    


77. 
    
                        out.print(
    
    
    
    ""
    
    
    
    );   
    
    


78. 
    
                        out.close();   
    
    


79. 
    
                    }   
    
    


80. 
    
                }   
    
    


81. 
    
            } 
    
    
    
    
    catch
    
    
    
    
     (Exception e) {   
    
    


82. 
    
                e.printStackTrace();   
    
    


83. 
    
            }   
    
    


84. 
    
        }   
    
    


85. 
    
           
    
    


86. 
    
    }  
    
    

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.log4j.Logger;
import com.siyue.ciap.beans.dic.EnvBean;
import com.siyue.ciap.dao.cms.UUIDGenerator;
import com.siyue.ciap.dao.phone.ReadFileUtil;
import com.siyue.ciap.dao.uitls.ObjectToJSON;
import com.siyue.ciap.service.uitl.SpringFacesUtil;
public class UploadFileServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
private static final Logger logger = Logger.getLogger(UploadFileServlet.class);

protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("execute Upload File.................");
PrintWriter out = response.getWriter();
EnvBean envBean =(EnvBean)SpringFacesUtil
.getBean(this.getServletContext(), "EnvBean");
String uploadPath = envBean.getEnv().getProperty("upload_dest");//上传的路径
UUIDGenerator generator=new UUIDGenerator();
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(4096);//设置缓冲
factory.setRepository(new File(uploadPath));//设置缓冲区目录
ServletFileUpload upload = new ServletFileUpload(factory);
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
upload.setSizeMax(1024000000);
List items = new ArrayList();
try {
items = upload.parseRequest(request);
Map rtnMap = new HashMap();
for(int i=0;i FileItem item = (FileItem) items.get(i);
String autoFileName = generator.generate().toString();
if("".equals(item.getName()))continue;
//获得文件名
String fileName = item.getName().substring(item.getName()
.lastIndexOf("\\")+1, item.getName().length());
//获得文件后缀名
String extName = fileName
.substring(fileName.lastIndexOf(".")+1, fileName.length());
//判断文件类型
if(!("xls".equalsIgnoreCase(extName) || "txt".equalsIgnoreCase(extName) ||
"csv".equalsIgnoreCase(extName))) {
out.print("");
out.close();
}else {
String fileOnlyName= uploadPath + autoFileName + "." + extName;
item.write(new File(fileOnlyName));
Map excelMap = null;
if("xls".equalsIgnoreCase(extName)) {
System.out.println("fileOnlyName------>"+fileOnlyName);
excelMap = ReadFileUtil.readSheetName(fileOnlyName);
}
rtnMap.put("file", fileOnlyName);
rtnMap.put("sheet", excelMap);
out.print("");
out.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}

}

Java代码

1. 
   
   
   EnvBean envBean =(EnvBean)SpringFacesUtil   
   
   
   


2. 
   
                  .getBean(
   
   
   
   
   this
   
   
   
   
   .getServletContext(), 
   
   
   
   "EnvBean"
   
   
   
   );   
   
   


3. 
   
           String uploadPath = envBean.getEnv().getProperty(
   
   
   
   "upload_dest"
   
   
   
   );
   
   
   
   //上传的路径
   
   
   
     
   
   

EnvBean envBean =(EnvBean)SpringFacesUtil
.getBean(this.getServletContext(), "EnvBean");
String uploadPath = envBean.getEnv().getProperty("upload_dest");//上传的路径

这句是调Spring找类,根据实际情况变化

Java代码

1. 
   
   
   UUIDGenerator generator=
   
   
   
   
   new
   
   
   
   
    UUIDGenerator();   
   
   
   


2. 
   
   String autoFileName = generator.generate().toString();  
   
   

UUIDGenerator generator=new UUIDGenerator();
String autoFileName = generator.generate().toString();

这句是给每个上传的文件加一个唯一标示,可用别的方法替代

Java代码

1. 
   
   
   ObjectToJSON这个类是自己写一个Object和Json互转的类  
   
   
   

用FileUpload做得文件上传