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JSP页面加载xls表格数据

2016-08-10 13:49 393 查看

解析用到的第三方库:POI

HSSFWorkbook 类

直接贴代码

package com.jx;

import java.io.File;

import java.io.FileInputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.junit.Test;

public class jx {

static public int count = 0;
static public int row1 = 0;

public static void main(String[] args) throws Exception {
jx j = new jx();
List<List<Object>> hlist = null;
List<List<Object>> list = null;
List<Object> mlist = null;
hlist = j.Test(list, mlist);
}

@Test
public List<List<Object>> Test(List<List<Object>> list, List<Object> mlist)
throws Exception {
list = new ArrayList<List<Object>>();
try {

/*
* URL url =this.getClass().getResource("b.xls"); HSSFWorkbook wb =
* new HSSFWorkbook(new FileInputStream(url.getPath()));
*/
HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(new File(
"F:/b.xls")));
HSSFSheet sheet = wb.getSheetAt(0);
// System.out.println(sheet.getLastRowNum()); 行数
for (int j = 0; j < sheet.getLastRowNum() + 1; j++) {
count = sheet.getLastRowNum() + 1;
mlist = new ArrayList<Object>();
HSSFRow row = sheet.getRow(j); // 每行的列
for (int i = 0; i < row.getLastCellNum(); i++) {
row1 = row.getLastCellNum();
// row.getLastCellNum() 字段数
HSSFCell cell = row.getCell(i);
if (cell == null) {
mlist.add("");
} else {
if (cell.getCellType() == HSSFCell.CELL_TYPE_STRING) {

HSSFRichTextString resultString = cell
.getRichStringCellValue();
System.out.print(resultString + "\t");
mlist.add(resultString);
}
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {

int resultNum = (int) (cell.getNumericCellValue());
System.out.print(resultNum + "\t");
mlist.add(resultNum);
}
}
}
System.out.println();
list.add(mlist);
}

} catch (Exception e) {
e.printStackTrace();
}
return list;

}

}

表格可以自己加入数据

通过代码解析得到集合类

再通过前台进行获取

我这里将包导出成jar 放到WebRoot/WEB-INF/lib目录下

最后附上页面代码

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@page import="com.jx.*"%>
<%

jx j = new jx();
List<List<Object>> list = null;
List<Object> mlist = null;
List<List<Object>> hlist = null;
hlist=j.Test(list, mlist);

%>

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>

<body>
<table border="1" cellspacing="2" cellpadding="1" align="center"
width="80%">
<%
for (int i = 0; i < j.count; i++) {
%>
<tr>
<%
for (int k = 0; k < j.row1; k++) {
%>
<td><%=hlist.get(i).get(k)%></td>
<%
}
%>
</tr>
<%
}
%>
</table>
</body>
</html>

本来是想用forEach标签来取值但是嵌套的集合弄了半天还是取不到就干脆放到小脚本里面去了

实现的方式很多，不推荐在页面中直接放小脚本

可以用Servlet传值也可以用数据库来实现

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标签： jsp poi

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