EasyPOI的使用

EasyPOI：作用是对办公文件(word,excel.ppt)进行上传和下载，特点就是easy

maven项目导包：

<!–easypoi的支持包–>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-base</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-web</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-annotation</artifactId>
<version>3.2.0</version>
</dependency>

官方文档:http://easypoi.mydoc.io/

导出功能：

EasyPOI可以继承SpringMVC

扫描view和配置视图解析器

<!--扫描excel的view包-->
<context:component-scan base-package="cn.afterturn.easypoi.view" />
<context:component-scan base-package="cn.king.aisell.common" />
<!--根据bean的名称去返回  p:order顺序在前面 -->
<bean id="beanNameViewResolver" class="org.springframework.web.servlet.view.BeanNameViewResolver"
      p:order="0" />

准备前台页面和传入相应的查询数据

<form id="searchForm" method="post" action="/employee/export">
    用户名: <input name="username" class="easyui-text" style="width:80px">
    邮箱: <input name="email" class="easyui-text" style="width:80px">
    部门:<input name="departmentId" class="easyui-combobox" name="dept" panelHeight="auto" style="width:120px"
              data-options="valueField:\'id\',textField:\'name\',url:\'/util/departmentList\',editable:false"/>
    <a href="javascript:;" data-cmd="search" class="easyui-linkbutton" iconCls="icon-search">搜索</a>
    <a href="javascript:;" data-cmd="reset" class="easyui-linkbutton"
       data-options="iconCls:\'icon-reload\'">重置</a>
    <shiro:hasPermission name="employee:export">
        <button class="easyui-linkbutton" iconCls="icon-print" plain="true">导出</button>
    </shiro:hasPermission>
</form>

后台接收参数进行导出

//员工数据导出
@RequestMapping("/export")
public String exportEmployee(ModelMap map, EmployeeQuery query, HttpServletRequest request){
    //通过高级查询拿数据
    List<Employee> list = iEmployeeService.findByQuery(query);

    //拿到员工头像路径
    String realPath  = request.getServletContext().getRealPath("");
    list.forEach(e -> {
        e.setHeadImage(realPath + e.getHeadImage());
    });

    //将从数据库中拿到的信息导出到前台
    ExportParams params = new ExportParams("员工管理", "员工信息表", ExcelType.XSSF);
    // 数据集合(导出的数据)
    map.put(NormalExcelConstants.DATA_LIST, list);
    //导出实体
    map.put(NormalExcelConstants.CLASS, Employee.class);
    //参数
    map.put(NormalExcelConstants.PARAMS, params);
    //文件名称
    map.put(NormalExcelConstants.FILE_NAME, "员工信息表");
    //View名称
    return NormalExcelConstants.EASYPOI_EXCEL_VIEW;
}

导入功能

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>导入管理</title>
    <jsp:include page="BaseUI.jsp"></jsp:include>
</head>
<body>
<form action="/import/employeeXlsx" method="post" enctype="multipart/form-data">
    <input class="easyui-filebox" name="empFile" style="width:20%"
           data-options="prompt:\'选择一个文件...\',buttonText: \'选择文件\'" />
    <button class="easyui-linkbutton">导入</button>
</form>
<h3 style="color: red">上传说明</h3>
<h4>
    上传必须以下载的excel格式为准
</h4>
<h4>
    用户名不得为空值或重复得值
</h4>
<h4>
    年龄应为20-80岁之间
</h4>
<h4>
    如果上传的文件不符合要求
</h4>
<h4>
    在上传提交后会出现上传失败文件，里面有上传失败的内容和原因
</h4>
<h4>
    若无提示，则表示上传成功
</h4>
</body>
</html>

导入后台

//上传员工excel的功能
@RequestMapping("/employeeXlsx")
public String employeeXlsx(MultipartFile empFile, HttpServletResponse response) throws Exception{
    //设置导入的参数
    ImportParams params = new ImportParams();
    //设置需要验证
    params.setNeedVerfiy(true);
    params.setHeadRows(1);
    //加入自定义验证
    params.setVerifyHandler(employeeExcelVerifyHandler);
    //获得excel但如的结果
    ExcelImportResult<Employee> result = ExcelImportUtil.importExcelMore(
            empFile.getInputStream(),
            Employee.class, params);
    //拿到正确的数据，然后把它们保存到数据库
    List<Employee> list = result.getList();
    list.forEach(e ->{
        //从数据库中查询部门
        String deptName = e.getDepartmentId().getName();
        Department dept = iDepartmentService.findByName(deptName);
        e.setDepartmentId(dept);
        //设置初始密码
        String md5EncryptionByPassword = MD5EncryptionByPassword.MD_5_ENCRYPTION_BY_PASSWORD.getMD5EncryptionByPassword("123");
        e.setPassword(md5EncryptionByPassword);
        iEmployeeService.save(e);
    });
    //如果有错误
    if(result.isVerfiyFail()) {
        //获得Workbook对象，以返回失败文档
        Workbook failWorkbook = result.getFailWorkbook();
        //设置响应的文件类型
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        //attachment:不要用浏览器打开
        response.setHeader("Content-disposition", "attachment;filename=empFail.xlsx");
        //设置不要缓存
        response.setHeader("Pragma", "No-cache");
        OutputStream ouputStream = response.getOutputStream();
        failWorkbook.write(ouputStream);
        ouputStream.flush();
        ouputStream.close();
    }
    return "importManage";
}

导入验证包

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-validator</artifactId>
  <version>5.2.4.Final</version>
</dependency>

domain类加上验证的注解

@Excel(name = "用户名")
@NotNull(message = "用户名不为空")
private String username;
private String password;
@Excel(name = "邮箱",width = 20)
private String email;
@Excel(name = "头像",type = 2,height = 30)
private String headImage;
@Excel(name = "年龄")
@Max(value = 80,message = "年龄最大值不能超过80")
@Min(value = 20,message = "年龄最大值不能小于20")
private Integer age;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "department_id")
@ExcelEntity//导出的是实体对象
private Department departmentId;

加上自定义验证

扫描自定义验证的包
<context:component-scan base-package="cn.king.aisell.common" />

自定义验证功能

@Component
public class EmployeeExcelVerifyHandler implements IExcelVerifyHandler<Employee> {

    @Autowired
    private IEmployeeService iemployeeService;

    @Override
    public ExcelVerifyHandlerResult verifyHandler(Employee employee) {
        //写逻辑验证用户名是否重复
        boolean success = iemployeeService.checkName(employee.getUsername());
        if(success){ //true代表可以用
            return new  ExcelVerifyHandlerResult(true);
        }
        return new ExcelVerifyHandlerResult(false,"用户名重复");
    }
}

完成controller上传

//上传员工excel的功能
@RequestMapping("/employeeXlsx")
public String employeeXlsx(MultipartFile empFile, HttpServletResponse response) throws Exception{
    //设置导入的参数
    ImportParams params = new ImportParams();
    //设置需要验证
    params.setNeedVerfiy(true);
    params.setHeadRows(1);
    //加入自定义验证
    params.setVerifyHandler(employeeExcelVerifyHandler);
    //获得excel但如的结果
    ExcelImportResult<Employee> result = ExcelImportUtil.importExcelMore(
            empFile.getInputStream(),
            Employee.class, params);
    //拿到正确的数据，然后把它们保存到数据库
    List<Employee> list = result.getList();
    list.forEach(e ->{
        //从数据库中查询部门
        String deptName = e.getDepartmentId().getName();
        Department dept = iDepartmentService.findByName(deptName);
        e.setDepartmentId(dept);
        //设置初始密码
        String md5EncryptionByPassword = MD5EncryptionByPassword.MD_5_ENCRYPTION_BY_PASSWORD.getMD5EncryptionByPassword("123");
        e.setPassword(md5EncryptionByPassword);
        iEmployeeService.save(e);
    });
    //如果有错误
    if(result.isVerfiyFail()) {
        //获得Workbook对象，以返回失败文档
        Workbook failWorkbook = result.getFailWorkbook();
        //设置响应的文件类型
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        //attachment:不要用浏览器打开
        response.setHeader("Content-disposition", "attachment;filename=empFail.xlsx");
        //设置不要缓存
        response.setHeader("Pragma", "No-cache");
        OutputStream ouputStream = response.getOutputStream();
        failWorkbook.write(ouputStream);
        ouputStream.flush();
        ouputStream.close();
    }
    return "importManage";
}

本文链接：https://www.cnblogs.com/kingofjava/p/10618522.html

EasyPOI的使用

导出功能：

准备前台页面和传入相应的查询数据

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