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  • 简单的 I/O读写 001

    创建一个xls文件,并写入内容

     1 public void doPost(HttpServletRequest request, HttpServletResponse response)
     2             throws ServletException, IOException {
     3 
     4         try{
     5             request.setCharacterEncoding("utf-8");
     6             response.setCharacterEncoding("utf-8");
     7             response.setContentType("text/html");
     8             //1. 获取目标文件路径
     9             String targerPath = "d:" + File.separator + "Jxl01.xls";
    10             //2. 根据1获取的路径,创建一个可以写入的工作簿
    11             WritableWorkbook workbook = Workbook.createWorkbook(new File(targerPath));
    12             //3. 为2创建的工作簿创建sheet表,名字为‘第一页’,索引从‘0’开始
    13             WritableSheet sheet = workbook.createSheet("第一页", 0);
    14             //4. 为3表创建Label,例(第一列,第一行,姓名)(第一列,第二行,张三)
    15             Label label = new Label(1, 1, "姓名");
    16             Label labe2 = new Label(2, 1, "年龄");
    17             Label labe3 = new Label(3, 1, "职业");
    18             Label labe4 = new Label(1, 2, "张三");
    19             Label labe5 = new Label(2, 2, "18");
    20             Label labe6 = new Label(3, 2, "学生");
    21             //5. 将4.Label对象加入到3表对应的单元格中
    22             sheet.addCell(label);
    23             sheet.addCell(labe2);
    24             sheet.addCell(labe3);
    25             sheet.addCell(labe4);
    26             sheet.addCell(labe5);
    27             sheet.addCell(labe6);
    28             //6. 在2工作簿中写入
    29             workbook.write();
    30             //7. 关闭工作簿
    31             workbook.close();
    32             
    33             PrintWriter out = response.getWriter();
    34             out.print("插入成功");
    35         } catch(Exception e) {
    36             e.printStackTrace();
    37         }
    38         
    39     }

    读取xls文件中表中的内容

     1 public void doPost(HttpServletRequest request, HttpServletResponse response)
     2             throws ServletException, IOException {
     3 
     4         try{
     5             request.setCharacterEncoding("utf-8");
     6             response.setCharacterEncoding("utf-8");
     7             response.setContentType("text/html");
     8             PrintWriter out = response.getWriter();    
     9             // 1.获取目标文件路径
    10             String targerPath = "d:" + File.separator + "Jxl01.xls";
    11             // 2.获取目标路径的文件
    12             Workbook book = Workbook.getWorkbook(new File(targerPath));
    13             // 3.获取目标文件中指定的表(索引从0开始)
    14             Sheet sheet = book.getSheet(0);
    15             // 4.将表中字段与其对应的内容组合成Jeson格式
    16             StringBuffer sb = new StringBuffer();
    17             sb.append("{");
    18             // 行循环
    19             for( int i=1; i<sheet.getRows(); i++) {
    20                 // 列循环
    21                 for(int j=1; j<sheet.getColumns(); j++) {
    22                     String key = sheet.getCell(j,1).getContents();
    23                     String value = sheet.getCell(j,2).getContents();
    24                     sb.append(" ""+key+"" : ""+value+"", ");
    25                     sb.append("");
    26                 }
    27             }
    28             sb.deleteCharAt(sb.length()-1);
    29             sb.append("}");
    30             // 5.关闭工作簿
    31             book.close();
    32             out.print(sb.toString());
    33         } catch( Exception e){
    34             e.printStackTrace();
    35         }
    36         
    37     }

     页面

     1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
     2 
     3 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
     4 <html>
     5   <head>
     6     
     7     <title>带键值的Excel数据导入导出</title>
     8     
     9     <meta http-equiv="pragma" content="no-cache">
    10     <meta http-equiv="cache-control" content="no-cache">
    11     <meta http-equiv="expires" content="0">    
    12     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    13     <meta http-equiv="description" content="This is my page">
    14     <!--
    15     <link rel="stylesheet" type="text/css" href="styles.css">
    16     -->
    17     <script type="text/javascript" src ="${pageContext.request.contextPath }/js/jquery-1.11.1.js"></script>
    18     <script type="text/javascript">
    19         var xmlHttpRequest = null;
    20         function getXmlHttpRequest(){
    21             if(window.XMLHttpRequest) {
    22                 xmlHttpRequest = new XMLHttpRequest();
    23             } else {
    24                 xmlHttpRequest = new ActiceXOject("Microsofit,XMLHTTP");
    25             }
    26         }
    27         
    28         function ajaxRequyest1(){
    29             getXmlHttpRequest();
    30             if(xmlHttpRequest) {
    31                 xmlHttpRequest.open("post","../Jxl01Servlet",true);
    32                 xmlHttpRequest.onreadystatechange = CallBack1;
    33                 xmlHttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    34                 xmlHttpRequest.send();
    35             }
    36         }
    37         
    38         function CallBack1() {
    39             if(xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200 ){
    40                 var result = xmlHttpRequest.responseText;
    41                 alert(result);
    42             }
    43         }
    44         
    45         /******************************************************************************************/
    46         
    47         function ajaxRequyest2(){
    48             getXmlHttpRequest();
    49             if(xmlHttpRequest) {
    50                 xmlHttpRequest.open("post","../OJxl01Servlet",true);
    51                 xmlHttpRequest.onreadystatechange = CallBack2;
    52                 xmlHttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    53                 xmlHttpRequest.send();
    54             }
    55         }
    56         
    57         function CallBack2() {
    58             if(xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200 ){
    59                 var result = xmlHttpRequest.responseText;
    60                 alert(result);
    61             }
    62         }
    63         
    64         $(function(){
    65             $("#InputEmpbtn").click(function(){
    66                 ajaxRequyest1();
    67             });
    68             $("#ExputEmpbtn").click(function(){
    69                 ajaxRequyest2();
    70             });
    71         })
    72     </script>
    73   </head>
    74   
    75   <body>
    76     <input id="InputEmpbtn" type="button" value="员工导入" />
    77     <input id="ExputEmpbtn" type="button" value="员工导出" />
    78   </body>
    79 </html>
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  • 原文地址:https://www.cnblogs.com/cfb513142804/p/4216811.html
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