Excel导入导出

Posted 2022-07-03 1999wang

　　　　　　　　　　　　　　　　　　　　Excel导入导出

jxl：只能对Excel进行操作，属于比较老的框架

 

 

POI：是apache的项目，可对ms的word,Excel,PPT进行操作，包括office2003和2007。对两种版本的处理都比较好。具体操作请看官方的文档。

 

excel的使用场景：excel和word这些都是办公的软件，但是有时候系统需要结合办公软件来使用，比如经常用户要求查询

那些部门的销售情况销和人数的时候

 

poi的使用：引入需要的 包

<dependency>
  <groupId>org.apache.poi</groupId>
  <artifactId>poi</artifactId>
  <version>3.11</version>
</dependency>
<dependency>
  <groupId>org.apache.poi</groupId>
  <artifactId>poi-ooxml</artifactId>
  <version>3.11</version>
</dependency>

完成一个99乘法表的导出：

 

public void testPoiWrite99() throws Exception
    //创建一个工作薄
    XSSFWorkbook workbook = new XSSFWorkbook();
    //创建一个表格
    XSSFSheet sheet = workbook.createSheet("99乘法表");
    for (int i = 1; i <=9 ; i++) 
        //9行 1*1
        //    1*2 2*2
        XSSFRow row = sheet.createRow(i-1);
        for (int j = 1; j <= i ; j++) 
            //创建一个单元格
            XSSFCell cell = row.createCell(j-1);
            cell.setCellValue(i+"*"+j+"="+(i*j));
        

    
    //输出
    FileOutputStream out = new FileOutputStream(
            new File("99.xlsx"));
    workbook.write(out);
    out.close();

SpringMVC  POI整合导入导出：

SpringMVC上传配置

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize">
        <value>1048576</value>
    </property>
</bean>

 

准备上传的按钮：

 

<form id="searchForm" action="/employee/download" method="post">
    用户名： <input name="username" class="easyui-textbox" style="width:80px;height:32px">
    邮件: <input name="email" class="easyui-textbox" style="width:80px;height:32px">
    部门 :
    <input  class="easyui-combobox" name="departmentId"
            data-options="valueField:‘id‘,textField:‘name‘,panelHeight:‘auto‘,url:‘/util/departmentList‘">
    <a href="#" data-method="search"  class="easyui-linkbutton" iconCls="icon-search">查找</a>
    <%--默认提交到form表单路劲--%>
    <button  class="easyui-linkbutton" iconCls="icon-redo">导出</button>
</form>

<form></form>标签提交的路劲导controller层

@RequestMapping("/import")
public class ImportController extends BaseController 

    //跳转到导入页面
    @RequestMapping("/index")
    public String index()
        return "import";
    

    //跳转到导入页面
    @RequestMapping("/xlsx")
    public String importXlsx(MultipartFile xlsxFile) throws Exception
        System.out.println(xlsxFile.getContentType()); //文件的类型(application/vnd.openxmlformats-officedocument.spreadsheetml.sheet)
        System.out.println(xlsxFile.getName()); //文件的名称(xlsxFile)
        System.out.println(xlsxFile.getOriginalFilename());//文件的名称(employee-3.xlsx)
        System.out.println(xlsxFile.getSize()); //文件的大小
        return "import";
    

准备上传的一个方法：

public static List<String[]> importExcel(InputStream is) throws Exception
    //一.准备装数据的容器
    List<String[]> list = new ArrayList<>();
    //1.读取一个Excel文件(内存中)
    Workbook wb = new XSSFWorkbook(is);
    //2.拿到第个sheet表
    Sheet sheet = wb.getSheetAt(0);
    //3.拿到wb中的行(不要拿头部)
    int lastRowNum = sheet.getLastRowNum();
    for (int i = 1; i <= lastRowNum; i++) 
        Row row = sheet.getRow(i);
        //4.拿到每一列(格子)
        short lastCellNum = row.getLastCellNum();
        //二.准备一个String[]装一行数据(有几列就有几条数据)
        String[] data = new String[lastCellNum];
        for (int j = 0; j < lastCellNum; j++) 
            Cell cell = row.getCell(j);
            data[j] = cell.getStringCellValue();
        
        //三.把一行数据写到集合中去
        list.add(data);
    
    return list;

最后成功了给出提示：

@RequestMapping("/xlsx")
public String importXlsx(MultipartFile xlsxFile, Model model) throws Exception
    //拿到上传的数据
    List<String[]> list = ExcelUtils.importExcel(xlsxFile.getInputStream());
    int count = 0;
    for (int i = 0; i < list.size(); i++) 
        //拿到每一行数据
        String[] data = list.get(i);
        //准备Employee对象进行数据放置
        Employee employee = new Employee();
        employee.setUsername(data[0]+ UUID.randomUUID().toString().substring(0,5));//随机一个名称
        employee.setPassword(data[1]);
        employee.setEmail(data[2]);
        String age = data[3];
        if(StringUtils.isNotBlank(age))
            employee.setAge(Integer.parseInt(age));
        
        //拿到与设置部门
        String deptName = data[4];
        if(StringUtils.isNotBlank(deptName))
            Department department = departmentService.findByName(deptName)[这个方法需要根据用户名去拿到相应的部门，我们不在笔记中体现与完成这个方法，希望同学们是可以自己把这个简单的小功能补齐！];
            employee.setDepartment(department);
        
        employeeService.save(employee);
        count ++;
    
    //给出成功提示
    model.addAttribute("count","成功导入"+count+"条数据！");
    return "import";

springMVC导入：

准备一个导入页面：

<html>
<head>
    <title>Title</title>
    <%@include file="/WEB-INF/views/head.jsp" %>
</head>
<body>
<!-- 上传必需是:post，enctype="multipart/form-data"-->
<form action="/import/employeeXlsx" method="post" enctype="multipart/form-data">
    <input class="easyui-filebox" name="empFile" style="width:80%"
           data-options="prompt:‘选择一个文件...‘,buttonText: ‘选择文件‘" />
    <button class="easyui-linkbutton">导入</button>
</form>
</body>
</html>

准备一个你要导入的文档：

进入controller层读取你要导入的文档最

 

@RequestMapping("/employeeXlsx1")
public String employeeXlsx1(MultipartFile empFile) throws Exception 
    
    ImportParams params = new ImportParams();
    params.setTitleRows(1);

    //导入
    List<Employee> list = ExcelImportUtil.importExcel(empFile.getInputStream(),
            Employee.class, params);

    for (Employee employee : list) 
        System.out.println(employee);
        //根据部门名称查询的部门对象
        String deptName = employee.getDepartment().getName();
        Department department = departmentService.findDepartmentByName(deptName);
        //设置部门
        employee.setDepartment(department);
　　　　//设置初始密码
        employee.setPassword("123456");
        //System.out.println(employee.getDepartment().getName());
        employeeService.save(employee);
    



    return "import";

 最后添加验证功能：

//开启验证
params.setNeedVerfiy(true);
//开启自定义验证
params.setVerifyHandler(aisellEmployeeVerifyHander);

//导入
ExcelImportResult<Employee> result = ExcelImportUtil.importExcelMore(empFile.getInputStream(),
        Employee.class, params);
//正确数据
for (Employee employee : result.getList()) 
    System.out.println(employee);
    //根据部门名称查询的部门对象
    String deptName = employee.getDepartment().getName();
    Department department = departmentService.findDepartmentByName(deptName);
    //设置部门
    employee.setDepartment(department);
    employee.setPassword("123456");
    //System.out.println(employee.getDepartment().getName());
    employeeService.save(employee);

 

最后把导入的信息添加到数据库然后展示到页面上让用户查看：

@RequestMapping("/employeeXlsx")
public String employeeXlsx(MultipartFile empFile, HttpServletResponse response) throws Exception 
    
    ImportParams params = new ImportParams();
    params.setTitleRows(1);
    //开启验证
    params.setNeedVerfiy(true);
    //开启自定义验证
    params.setVerifyHandler(aisellEmployeeVerifyHander);

    //导入
    ExcelImportResult<Employee> result = ExcelImportUtil.importExcelMore(empFile.getInputStream(),
            Employee.class, params);
    //正确数据
    for (Employee employee : result.getList()) 
        System.out.println(employee);
        //根据部门名称查询的部门对象
        String deptName = employee.getDepartment().getName();
        Department department = departmentService.findDepartmentByName(deptName);
        //设置部门
        employee.setDepartment(department);
        employee.setPassword("123456");
        //System.out.println(employee.getDepartment().getName());
        employeeService.save(employee);
    

    //错误的数据
    for (Employee employee : result.getFailList()) 
        System.out.println("错误数据："+employee);
    

    //传回前台 让用户查看 修改
    if(result.isVerfiyFail())
        //有时候信息
        Workbook failWorkbook = result.getFailWorkbook();
        //输出设置一堆参数
        //把这个文件导出
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); //mime类型
        response.setHeader("Content-disposition", "attachment;filename=error.xlsx");
        response.setHeader("Pragma", "No-cache");//设置不要缓存
       //输出内容
        OutputStream ouputStream = response.getOutputStream();
        failWorkbook.write(ouputStream);
        ouputStream.flush();
        ouputStream.close();

    



    return "import";