從excel導出數據到mysql

我有一個excel表。使用它的信息我必須派生一些細節並將它存儲在mysql表中。從excel導出數據到mysql

我的代碼是：

<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %> 
<%@page import="java.io.IOException"%> 
<%@page import="java.sql.SQLException"%> 
<%@page import="cnn.sem_year_conversion"%> 
<%@page import="org.apache.poi.ss.usermodel.Row"%> 
<%@page import="org.apache.poi.hssf.usermodel.HSSFCell"%> 
<%@page import="org.apache.poi.hssf.usermodel.HSSFRow"%> 
<%@page import="org.apache.poi.hssf.usermodel.HSSFSheet"%> 
<%@page import="org.apache.poi.hssf.usermodel.HSSFWorkbook"%> 
<%@page import="org.apache.poi.poifs.filesystem.POIFSFileSystem"%> 
<%@page import="java.util.Iterator"%> 
<%@page import="java.io.FileInputStream"%> 
<%@page import="java.util.ArrayList"%> 
<%@page import="java.sql.PreparedStatement"%> 
<%@page import="java.sql.Connection"%> 
<%@page import="cnn.cn"%> 
<%@page contentType="text/html" pageEncoding="UTF-8"%> 
<!DOCTYPE html> 
<html> 
    <head> 
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
     <title>JSP Page</title> 
    </head> 
    <body> 

<% 
    try 
    { 
Connection con=cn.getcon(); 
PreparedStatement ps=null; 

    String name,f_name,branch="",enroll,status="regular",sem,elligible=""; 
int year= 0; 
int flag; 
int count=0; 
     con.setAutoCommit(false); 
     PreparedStatement pstm = null ; 
     FileInputStream input = new FileInputStream("C:/Users/intel/Documents/student_excel.xls"); 
     POIFSFileSystem fs = new POIFSFileSystem(input); //creating a new poi reference to the given excel file 
     HSSFWorkbook wb = new HSSFWorkbook(fs); 
     HSSFSheet sheet = wb.getSheetAt(0); 
     Row row; 
       for(int i=1; i<=sheet.getLastRowNum(); i++) 
       { 
        //points to the starting of excel i.e excel first row 
      row = (Row) sheet.getRow(i); //sheet number 
           if(row.getCell(1)==null) { enroll = "0";} //suppose excel cell is empty then its set to 0 the variable 
        else enroll = row.getCell(1).toString(); //else copies cell data to name variable 

            if(row.getCell(2)==null) { name = "0";} //suppose excel cell is empty then its set to 0 the variable 
        else name = row.getCell(2).toString(); //else copies cell data to name variable 

             if(row.getCell(3)==null) { f_name = "0";} //suppose excel cell is empty then its set to 0 the variable 
        else f_name = row.getCell(3).toString(); //else copies cell data to name variable 

    if(row.getCell(5)==null) { sem = "0";} //suppose excel cell is empty then its set to 0 the variable 
        else sem = row.getCell(5).toString(); //else copies cell data to name variable 

       switch (sem) { 
      case "1": 
      case "2": 
       year=1; 
       break; 
      case "3": 
      case "4": 
       year=2; 
       break; 
      case "5": 
      case "6": 
       year=3; 
       break; 
      case "7": 
      case "8": 
       year=4; 
       break; 
       default:year=0; 
     } 

     if(row.getCell(6)==null) { elligible="0";} //suppose excel cell is empty then its set to 0 the variable 
        else elligible = row.getCell(6).toString(); //else copies cell data to elligible variable 
if(elligible=="Submitted to RGPV"|| elligible=="Forwarded by RGPV") 
    flag=0; 
else 
    flag=1; 
    if(enroll.contains("AU")) 
     branch="au"; 
    else if(enroll.contains("EC")) 
     branch="ec"; 
    else if(enroll.contains("CS")) 
     branch="cs"; 
    else if(enroll.contains("CE")) 
     branch="ce"; 
    else if(enroll.contains("IT")) 
     branch="it"; 


String query="insert into student values(?,?,0,3,?,?,?)"; 
ps=con.prepareStatement(query); 
ps.setString(1, enroll); 
ps.setString(2, name); 
ps.setString(3, branch); 
ps.setInt(4,year); 
ps.setString(5, f_name); 
ps.setString(6, status); 


count=ps.executeUpdate(); 

       } 


//For checking data is inserted or not? 

      con.commit(); 
     pstm.close(); 
     con.close(); 
     input.close(); 
     if(count>0) 
     System.out.println("Successful import of excel to mysql table"); 

     else 
      System.out.println("Import Failed."); 

    } 

    catch(SQLException ex){ 
     out.println(ex); 
    }catch(IOException ioe)`{ 
     out.println(ioe); 
    } 


%> 

    </body> 
</html>

但它產生以下錯誤---

HTTP Status 500 - Internal Server Error 

type Exception report 

messageInternal Server Error 

descriptionThe server encountered an internal error that prevented it from fulfilling this request. 

exception 

org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP 

PWC6199: Generated servlet error: 
source value 1.5 is obsolete and will be removed in a future release 

PWC6199: Generated servlet error: 
target value 1.5 is obsolete and will be removed in a future release 

PWC6199: Generated servlet error: 
To suppress warnings about obsolete options, use -Xlint:-options. 

PWC6197: An error occurred at line: 32 in the jsp file: /student_info.jsp 
PWC6199: Generated servlet error: 
strings in switch are not supported in -source 1.5 
    (use -source 7 or higher to enable strings in switch) 

note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.0 logs. 
GlassFish Server Open Source Edition 4.0

我已經在開關情況下使用字符串，因爲使用INT這是給exception-

org.apache.jasper.JasperException: java.lang.NumberFormatException: For input string: "1.0"

如何解決這個問題？

來源

2015-05-09 Archi

你試着解決這個錯誤是什麼？ –

我沒有理解錯誤，所以我無法解決它 – Archi

從您當前的代碼是這個錯誤？哪條線？完整的錯誤堆棧跟蹤？「int」版本的錯誤是什麼？你正在使用哪個jdk？ –

我認爲它應該是開關語句的例外，因爲開關與byte，short，char和int基本數據類型一起工作。

嘗試將數據轉換爲整數，然後再切換它。

來源

2015-05-10 05:52:28

我已經嘗試過了，但後來它給出了我上面提到的異常「NumberFormatexception」 – Archi

NumberFormatexception發生在需要字符串到浮點轉換時。所以我首先將字符串變量轉換爲float，然後轉換爲int。在開關盒中使用了int版本。現在代碼運行正常。 – Archi

從excel導出數據到mysql

回答

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