从excel导出数据到mysql

我有一个excel表。使用它的信息我必须派生一些细节并将它存储在mysql表中。从excel导出数据到mysql

我的代码是：

<%@ 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>

但它产生以下错误---

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

我已经在开关情况下使用字符串，因为使用INT这是给exception-

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

如何解决这个问题？

来源

2015-05-09 Archi

你试着解决这个错误是什么？ –

我没有理解错误，所以我无法解决它 – Archi

从您当前的代码是这个错误？哪条线？完整的错误堆栈跟踪？“int”版本的错误是什么？你正在使用哪个jdk？ –

我认为它应该是开关语句的例外，因为开关与byte，short，char和int基本数据类型一起工作。

尝试将数据转换为整数，然后再切换它。

来源

2015-05-10 05:52:28

我已经尝试过了，但后来它给出了我上面提到的异常“NumberFormatexception” – Archi

NumberFormatexception发生在需要字符串到浮点转换时。所以我首先将字符串变量转换为float，然后转换为int。在开关盒中使用了int版本。现在代码运行正常。 – Archi

从excel导出数据到mysql

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