導包:
1 <!-- easypoi的支持 --> 2 <dependency> 3 <groupId>cn.afterturn</groupId> 4 <artifactId>easypoi-base</artifactId> 5 <version>3.2.0</version> 6 </dependency> 7 <dependency> 8 <groupId>cn.afterturn</groupId> 9 <artifactId>easypoi-web</artifactId> 10 <version>3.2.0</version> 11 </dependency> 12 <dependency> 13 <groupId>cn.afterturn</groupId> 14 <artifactId>easypoi-annotation</artifactId> 15 <version>3.2.0</version> 16 </dependency>
一:文件下載
1:前台准備導出按鈕
1 <button class="easyui-linkbutton" iconCls="icon-search">數據導出</button>
1.2 准備好view（beanName的視圖解析器）
在applicationContext-mvc.xml
<!--配置一下beanName的視圖解析器 p:order="0":設置屬性優先級 --> <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" p:order="0" /> <!-- <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"> <property name="order" value="0" /> </bean> --> <!-- 對於easypoi中准備發的視圖(view)的掃描 --> <context:component-scan base-package="cn.afterturn.easypoi.view" />
1.3:在DownloadController完成后台導出
/** * 導出就是下載(下載就是把一個流 從服務器端 -> 客戶端) * * EasypoiSingleExcelView : 注解導出的view */ @RequestMapping("/export") public String export(EmployeeQuery query,ModelMap map, HttpServletRequest request){ //根據查詢條件拿到所有數據 List<Employee> list = employeeService.queryAll(query); //導出的屬性 ExportParams params = new ExportParams("員工數據", "員工表", ExcelType.XSSF); //params.setFreezeCol(2); 凍結 //request:獲取到真實路徑 String realPath = request.getServletContext().getRealPath(""); System.out.println(realPath); list.forEach(e->{ e.setHeadImage(realPath+e.getHeadImage()); }); map.put(NormalExcelConstants.DATA_LIST, list); // 數據集合 map.put(NormalExcelConstants.CLASS, Employee.class);//導出實體 map.put(NormalExcelConstants.PARAMS, params);//參數 map.put(NormalExcelConstants.FILE_NAME, "employee");//文件名稱 //根據返回的名稱去找一個bean對象(在SpringMVC稱之為view) // /WEB-INF/views/easypoiExcelView // 我們直接要文檔的的操作是沒有成功的 2.文檔的情況和我們項目中的情況有一點區別 return NormalExcelConstants.EASYPOI_EXCEL_VIEW;//View名稱 "easypoiExcelView" }
二:上傳功能
1:配置上傳解析器注意，名字必需叫 multipartResolver
1 <!--配置上傳解析器--> 2 <bean id="multipartResolver" 3 class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 4 <!-- 默認編碼 --> 5 <property name="defaultEncoding" value="utf-8" /> 6 <!-- 文件大小最大值 --> 7 <property name="maxUploadSize" value="10485760000" /> 8 <!-- 內存中的最小值 --> 9 <property name="maxInMemorySize" value="40960" /> 10 </bean>
2 准備導入頁面import.jsp
1 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 2 <html> 3 <head> 4 <title>Title</title> 5 <%@ include file="/WEB-INF/views/head.jsp"%> 6 </head> 7 <body> 8 9 <%-- 10 上傳只能是post請求 11 上傳必需設置 : enctype="multipart/form-data" 12 --%> 13 <!-- 上傳必需是:post，enctype="multipart/form-data"--> 14 <form action="/import/employeeXlsx" method="post" enctype="multipart/form-data"> 15 <input class="easyui-filebox" name="empFile" style="width:80%" 16 data-options="prompt:'選擇一個文件...',buttonText: '選擇文件'" /> 17 <button class="easyui-linkbutton">導入</button> 18 </form> 19 </body> 20 </html>
3: 后台ImportController完成導入功能
1 @Controller 2 @RequestMapping("/import") 3 public class ImportController extends BaseController { 4 5 @Autowired 6 private IDepartmentService departmentService; 7 8 @RequestMapping("/index") 9 public String index(){ 10 return "import"; 11 } 12 13 14 15 /** 16 * 上傳的文件使用 MultipartFile類型來接收 17 * @param empFile 18 * @return 19 */ 20 @RequestMapping("/employeeXlsx") 21 public String employeeXlsx(MultipartFile empFile) throws Exception { 22 // System.out.println(empFile); 23 // System.out.println(empFile.getName()); //empFile:上傳控件的名稱 24 // System.out.println(empFile.getOriginalFilename()); //emp-poi.xlsx:上傳文件的名稱 25 // System.out.println(empFile.getContentType()); //mime類型 office excel 2007 26 // System.out.println(empFile.getSize()); //文件大小 27 //我們需要拿到上傳的文件(輸入流) 28 // empFile.getInputStream() 29 //一.使用EasyPoi獲取文件數據 30 //1.1 設置參數 31 ImportParams params = new ImportParams(); 32 //params.setTitleRows(1); 33 params.setHeadRows(1); 34 // 1.2 拿到文件中的數據 35 List<Employee> list = ExcelImportUtil.importExcel(empFile.getInputStream(), 36 Employee.class, params); 37 //二.保存員工數據 38 list.forEach(e->{ 39 //導入時加上一個默認密碼 40 e.setPassword("123"); 41 //通過部門名稱拿到部門數據(要有id) 42 Department dept = departmentService.findByName(e.getDepartment().getName()); 43 //把部門設置到員工數據中 44 e.setDepartment(dept); 45 employeeService.save(e); 46 } ); 47 48 return "import"; 49 } 50 51 }
三.導入驗證功能
1 導入驗證包支持 pom.xml
1 <!-- JSR 303 規范驗證包 --> 2 <dependency> 3 <groupId>org.hibernate</groupId> 4 <artifactId>hibernate-validator</artifactId> 5 <version>5.2.4.Final</version> 6 </dependency>
2 domain中添加驗證方法
注解普通驗證
1 @Entity 2 @Table(name = "employee") 3 public class Employee extends BaseDomain { 4 5 @Excel(name = "用戶名") 6 @NotNull(message = "用戶名不能空") 7 private String username; 8 private String password; 9 @Excel(name = "年齡") 10 @Max(value = 100) 11 @Min(value = 18) 12 private Integer age; 13 @Excel(name = "郵箱",width = 20) 14 @NotNull 15 private String email; 16 ... 17 }
3:自定義驗證
1 實現IExcelVerifyHandler 2 3 4 5 /** 6 * 自定義驗證(我們會在這里做唯一性的驗證) 7 */ 8 @Component 9 public class EmployeeExcelVerifyHandler implements IExcelVerifyHandler<Employee> { 10 11 @Autowired 12 private IEmployeeService employeeService; 13 /** 14 * 15 * ExcelVerifyHandlerResult 16 * suceess :代表驗證成功還是失敗(如果用戶名重復，就代表失敗) 17 * msg:失敗的原因 18 */ 19 @Override 20 public ExcelVerifyHandlerResult verifyHandler(Employee employee) { 21 22 ExcelVerifyHandlerResult result = new ExcelVerifyHandlerResult(true); 23 //如果根據用戶名獲取到用戶，代表這個用戶已經存在 24 Employee tempEmp = employeeService.findByUsername(employee.getUsername()); 25 if(tempEmp!=null){ 26 result.setSuccess(false); 27 result.setMsg("用戶名重復"); 28 } 29 30 return result; 31 } 32 }
把這個類交給Spring管理(千萬不要忘了讓SpringMvc去掃描到它)
1 <!--掃描工具包--> 2 <context:component-scan base-package="com.logo.aisell.util"/>
4實現驗證功能
@Controller @RequestMapping("/import") public class ImportController extends BaseController { @Autowired private IEmployeeService employeeService; @Autowired private IDepartmentService departmentService; @Autowired private EmployeeExcelVerifyHandler employeeExcelVerifyHandler; @RequestMapping("/index") public String index(){ return "import"; } @RequestMapping("/employeeXlsx") public String employeeXlsx(MultipartFile empFile, HttpServletResponse response) throws Exception { //一.使用EasyPoi獲取文件數據 ImportParams params = new ImportParams(); params.setHeadRows(1); params.setNeedVerfiy(true); //設置驗證支持 params.setVerifyHandler(employeeExcelVerifyHandler); //設置一個驗證處理器 //二.獲取excel中的數據，封裝成了一個結果對象(有很多東西) ExcelImportResult<Employee> result = ExcelImportUtil.importExcelMore( empFile.getInputStream(), Employee.class, params); //三.獲到正確的數據，並把它們保存到數據庫 List<Employee> list = result.getList(); list.forEach(e->{ e.setPassword("123"); Department dept = departmentService.findByName(e.getDepartment().getName()); e.setDepartment(dept); employeeService.save(e); }); //四.如果有錯誤，把錯誤數據返回到前台(讓前台下載一個錯誤的excel) //4.1判斷是否有錯誤 if(result.isVerfiyFail()){ //4.2拿到錯誤的文件薄 Workbook failWorkbook = result.getFailWorkbook(); //把這個文件導出 response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); //mime類型 response.setHeader("Content-disposition", "attachment;filename=error.xlsx"); //告訴瀏覽下載的是一個附件，名字叫做error.xlsx response.setHeader("Pragma", "No-cache");//設置不要緩存 OutputStream ouputStream = response.getOutputStream(); failWorkbook.write(ouputStream); ouputStream.flush(); ouputStream.close(); } return "import"; } }