Java 如何读取excel多张工作表以将excel工作表的内容存储到数据库中
我是java新手, 现在,我已经创建了用于读取excel工作表并使用ApachePOI将其发送到数据库的代码。 我已经通过第一次查询成功地阅读了第1页,并将其发送到数据库,但我不知道如何通过第二次查询和表格阅读第2页。 这两张表有两个不同的问题,如何在准备的陈述中提及。 或者有没有其他方法可以做到这一点。 请帮我解决这个问题。 代码是Java 如何读取excel多张工作表以将excel工作表的内容存储到数据库中,java,excel,jdbc,Java,Excel,Jdbc,我是java新手, 现在,我已经创建了用于读取excel工作表并使用ApachePOI将其发送到数据库的代码。 我已经通过第一次查询成功地阅读了第1页,并将其发送到数据库,但我不知道如何通过第二次查询和表格阅读第2页。 这两张表有两个不同的问题,如何在准备的陈述中提及。 或者有没有其他方法可以做到这一点。 请帮我解决这个问题。 代码是 <html> <head> <meta http-equiv="Content-Type" content="text/html"&
<html>
<head>
<meta http-equiv="Content-Type" content="text/html">
<title>Excel</title>
</head>
<body>
<FORM ENCTYPE="multipart/form-data" ACTION="Excel.jsp" METHOD=POST>
<br><br><br>
<center><table border="2" >
<tr><center><td colspan="2"><p align="center"><B>UPLOAD THE FILE</B><center></td></tr>
<tr><td><b>Choose the file To Upload:</b>
</td>
<td><INPUT NAME="file" TYPE="file" accept=".csv, application/vnd.openxmlformats- officedocument.spreadsheetml.sheet, application/vnd.ms-excel"></td></tr>
<tr><td colspan="2">
<p align="right"><INPUT TYPE="submit" VALUE="Send File" ></p></td></tr>
</center>
</FORM>
</body>
<jsp:useBean id="connection" class="DB.DB_Connection" scope="page">
<jsp:setProperty name="connection" property="*"/>
</jsp:useBean>
</html>
<%!
Connection con;
PreparedStatement ps=null;
PreparedStatement ps2=null;
public static ArrayList readExcelFile(String fileName) throws SQLException
{
/** --Define a ArrayList
--Holds ArrayList Of Cells
*/
ArrayList cellArrayLisstHolder = new ArrayList();
try{
/** Creating Input Stream**/
FileInputStream myInput = new FileInputStream(fileName);
/** Create a POIFSFileSystem object**/
POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
/** Create a workbook using the File System**/
HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
/** Get the first sheet from workbook**/
HSSFSheet mySheet = myWorkBook.getSheetAt(0);
HSSFSheet mySheet2 = myWorkBook.getSheetAt(1);
/** We now need something to iterate through the cells.**/
Iterator rowIter = mySheet.rowIterator();
Iterator rowIter1 = mySheet2.rowIterator();
while(rowIter.hasNext()){
HSSFRow myRow = (HSSFRow) rowIter.next();
Iterator cellIter = myRow.cellIterator();
ArrayList cellStoreArrayList=new ArrayList();
while(cellIter.hasNext()){
HSSFCell myCell = (HSSFCell) cellIter.next();
HSSFCell cell;
short i= 1;
do {
cell = myRow.getCell(i);// Start from first column
if (cell == null) {
break;
}
if (cell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
// Plain String Cell.
System.out.println("The Cell is a String with value : "
+ cell.getStringCellValue());
} else if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
// Excel stores the Date as a Numeric Contents. POI provides
// a Date utility to check
// if a particular cell is formatted as a date.
if (HSSFDateUtil.isCellDateFormatted(cell)) {
Date date = HSSFDateUtil.getJavaDate((double) cell
.getNumericCellValue());
SimpleDateFormat df = new SimpleDateFormat("dd/mm/yyyy");
System.out.println("The cell is a Date : " + df.format(date));
} else {
// treat the cell as 'double' number
System.out.println("The cell is a number : "
+ cell.getNumericCellValue());
}
} else if (cell.getCellType() == HSSFCell.CELL_TYPE_BLANK) {
// Some of the cells will be rendered blank when cells in
// Excel are merged... one such cell
System.out
.println("A Blank Cell Encountered.... any merging happened???");
} else {
System.out.println("The cell is nothing we're interested in ...");
}
i++; // increment cell counter!!!
} while (cell != null);
cellStoreArrayList.add(myCell);
}
cellArrayLisstHolder.add(cellStoreArrayList);
}
while(rowIter1.hasNext()){
HSSFRow myRow1 = (HSSFRow) rowIter.next();
Iterator cellIter1 = myRow1.cellIterator();
ArrayList cellStoreArrayList1=new ArrayList();
while(cellIter1.hasNext()){
HSSFCell myCell1 = (HSSFCell) cellIter1.next();
HSSFCell cell1;
short i= 1;
do {
cell1 = myRow1.getCell(i); // Start from first column
if (cell1 == null) {
break;
}
if (cell1.getCellType() == HSSFCell.CELL_TYPE_STRING) {
// Plain String Cell.
System.out.println("The Cell is a String with value : "
+ cell1.getStringCellValue());
} else if (cell1.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
// Excel stores the Date as a Numeric Contents. POI provides
// a Date utility to check
// if a particular cell is formatted as a date.
if (HSSFDateUtil.isCellDateFormatted(cell1)) {
Date date = HSSFDateUtil.getJavaDate((double) cell1
.getNumericCellValue());
SimpleDateFormat df = new SimpleDateFormat("mm/dd/yyyy");
System.out.println("The cell is a Date : " + df.format(date));
} else {
// treat the cell as 'double' number
System.out.println("The cell is a number : "
+ cell1.getNumericCellValue());
}
} else if (cell1.getCellType() == HSSFCell.CELL_TYPE_BLANK) {
// Some of the cells will be rendered blank when cells in
// Excel are merged... one such cell
System.out
.println("A Blank Cell Encountered.... any merging happened???");
} else {
System.out.println("The cell is nothing we're interested in ...");
}
i++; // increment cell counter!!!
} while (cell1 != null);
cellStoreArrayList1.add(myCell1);
}
cellArrayLisstHolder.add(cellStoreArrayList1);
}
}catch (Exception e){e.printStackTrace(); }
return cellArrayLisstHolder;
}
%>
<%
File f = new File("DeptHosp.xls");
System.out.println(f.getAbsolutePath());
File file = new File(".");
for(String fileNames : file.list()) System.out.println(fileNames);
String fileName="D://PROJECT//SOFTWARES//eclipse_Juno//eclipse//DeptHosp.xls";
System.out.println(" path found");
ArrayList dataHolder=readExcelFile(fileName);
//Print the data read
//printCellDataToConsole(dataHolder);
con=connection.getConn();
System.out.println("Inserting the details");
String query="insert into departmentmaster(Dept_id,Dept_Groupid,Dept_Kid,Dept_Groupkid,Dept_Group,Dept_Name,Dept_type,Dept_HospitalId,Dept_datecreated,Dept_datelastrefreshed)values(?,?,?,?,?,?,?,?,?,?)";
String query1="insert into hospitalmaster(hospital_group,hospital_name)values(?,?)";
ps=con.prepareStatement(query);
ps2=con.prepareStatement(query1);
System.out.println("Database");
int count=0;
ArrayList cellStoreArrayList=null;
Date datevalue=null;
//For inserting into database
for (int i=1;i < dataHolder.size(); i++) {
cellStoreArrayList=(ArrayList)dataHolder.get(i);
ps.setString(1,((HSSFCell)cellStoreArrayList.get(1)).getStringCellValue());
ps.setString(2,((HSSFCell)cellStoreArrayList.get(1)).getStringCellValue());
ps.setString(3,((HSSFCell)cellStoreArrayList.get(2)).getStringCellValue());
ps.setString(4,((HSSFCell)cellStoreArrayList.get(3)).getStringCellValue());
ps.setString(5,((HSSFCell)cellStoreArrayList.get(4)).getStringCellValue());
ps.setString(6,((HSSFCell)cellStoreArrayList.get(5)).getStringCellValue());
ps.setString(7,((HSSFCell)cellStoreArrayList.get(6)).getStringCellValue());
ps.setString(8,((HSSFCell)cellStoreArrayList.get(7)).getStringCellValue());
ps.setString(9,((HSSFCell)cellStoreArrayList.get(8)).getStringCellValue());
ps.setString(10,((HSSFCell)cellStoreArrayList.get(9)).getStringCellValue());
count= ps.executeUpdate();
ps2.setString(1,((HSSFCell)cellStoreArrayList.get(1)).getStringCellValue());
ps2.setString(2,((HSSFCell)cellStoreArrayList.get(1)).getStringCellValue());
count= ps2.executeUpdate();
}
</body>
</html>
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也许你把东西混在一起了。您已经解决了如何显示JSP、读取带有POI的Excel文件以及将行写入数据库的问题。我建议您重新设计代码以分离这些任务。可能是一个简单的类(Reader.java),它只读取excel文件并为每张工作表生成一个ArrayList
,然后是一个简单的类(Writer.java),包含两个方法,每个方法都获取一个ArrayList
,并根据需要将它们写入数据库。这将导致一个更简单的自顶向下的设计,这将更容易调试
顺便说一下,您正在代码中创建一个数据库连接,而不是返回它。您应该为应用程序中使用的每个数据库资源(ResultSets
、语句
和连接
)调用.close()
方法,或者使用一些惯用法(尝试使用资源、Spring资源管理等)确保这样做
附加内容:当您对java感到更满意时,可以看看
这是连接到web应用程序中可能有数百或数千个并发用户的数据库的首选方式。你的想法是,为每一次访问你的页面打开一个新的连接,这对于学术活动来说是完全正确的,这将在实际环境中导致效率问题。也许你的应用服务器有一个内置的连接池机制(最新版本的Tomcat,WebLogic,WebSphere中有它们),或者你可以考虑使用Apache DCP或C3PO。< /P>可能的副本