标签：servlet name xss public NPU frame book common 条件
导包:
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:文件下载
1:前台准备导出按钮
1 <button class="easyui-linkbutton" iconCls="icon-search">数据导出</button>
1.2 准备好view（beanName的视图解析器）
在applicationContext-mvc.xml
<!--配置一下beanName的视图解析器 p:order="0":设置属性优先级 --> <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> --> <!-- 对于easypoi中准备发的视图(view)的扫描 --> <context:component-scan base-package="cn.afterturn.easypoi.view" />
1.3:在DownloadController完成后台导出
/** * 导出就是下载(下载就是把一个流 从服务器端 -> 客户端) * * EasypoiSingleExcelView : 注解导出的view */ @RequestMapping("/export") public String export(EmployeeQuery query,ModelMap map, HttpServletRequest request){ //根据查询条件拿到所有数据 List<Employee> list = employeeService.queryAll(query); //导出的属性 ExportParams params = new ExportParams("员工数据", "员工表", ExcelType.XSSF); //params.setFreezeCol(2); 冻结 //request:获取到真实路径 String realPath = request.getServletContext().getRealPath(""); System.out.println(realPath); list.forEach(e->{ e.setHeadImage(realPath+e.getHeadImage()); }); map.put(NormalExcelConstants.DATA_LIST, list); // 数据集合 map.put(NormalExcelConstants.CLASS, Employee.class);//导出实体 map.put(NormalExcelConstants.PARAMS, params);//参数 map.put(NormalExcelConstants.FILE_NAME, "employee");//文件名称 //根据返回的名称去找一个bean对象(在SpringMVC称之为view) // /WEB-INF/views/easypoiExcelView // 我们直接要文档的的操作是没有成功的 2.文档的情况和我们项目中的情况有一点区别 return NormalExcelConstants.EASYPOI_EXCEL_VIEW;//View名称 "easypoiExcelView" }
二:上传功能
1:配置上传解析器注意，名字必需叫 multipartResolver
1 <!--配置上传解析器--> 2 <bean id="multipartResolver" 3 class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 4 <!-- 默认编码 --> 5 <property name="defaultEncoding" value="utf-8" /> 6 <!-- 文件大小最大值 --> 7 <property name="maxUploadSize" value="10485760000" /> 8 <!-- 内存中的最小值 --> 9 <property name="maxInMemorySize" value="40960" /> 10 </bean>
2 准备导入页面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 上传只能是post请求 11 上传必需设置 : enctype="multipart/form-data" 12 --%> 13 <!-- 上传必需是: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:‘选择一个文件...‘,buttonText: ‘选择文件‘" /> 17 <button class="easyui-linkbutton">导入</button> 18 </form> 19 </body> 20 </html>
3: 后台ImportController完成导入功能
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 * 上传的文件使用 MultipartFile类型来接收 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:上传控件的名称 24 // System.out.println(empFile.getOriginalFilename()); //emp-poi.xlsx:上传文件的名称 25 // System.out.println(empFile.getContentType()); //mime类型 office excel 2007 26 // System.out.println(empFile.getSize()); //文件大小 27 //我们需要拿到上传的文件(输入流) 28 // empFile.getInputStream() 29 //一.使用EasyPoi获取文件数据 30 //1.1 设置参数 31 ImportParams params = new ImportParams(); 32 //params.setTitleRows(1); 33 params.setHeadRows(1); 34 // 1.2 拿到文件中的数据 35 List<Employee> list = ExcelImportUtil.importExcel(empFile.getInputStream(), 36 Employee.class, params); 37 //二.保存员工数据 38 list.forEach(e->{ 39 //导入时加上一个默认密码 40 e.setPassword("123"); 41 //通过部门名称拿到部门数据(要有id) 42 Department dept = departmentService.findByName(e.getDepartment().getName()); 43 //把部门设置到员工数据中 44 e.setDepartment(dept); 45 employeeService.save(e); 46 } ); 47 48 return "import"; 49 } 50 51 }
1 <!-- JSR 303 规范验证包 --> 2 <dependency> 3 <groupId>org.hibernate</groupId> 4 <artifactId>hibernate-validator</artifactId> 5 <version>5.2.4.Final</version> 6 </dependency>
1 @Entity 2 @Table(name = "employee") 3 public class Employee extends BaseDomain { 4 5 @Excel(name = "用户名") 6 @NotNull(message = "用户名不能空") 7 private String username; 8 private String password; 9 @Excel(name = "年龄") 10 @Max(value = 100) 11 @Min(value = 18) 12 private Integer age; 13 @Excel(name = "邮箱",width = 20) 14 @NotNull 15 private String email; 16 ... 17 }
1 实现IExcelVerifyHandler 2 3 4 5 /** 6 * 自定义验证(我们会在这里做唯一性的验证) 7 */ 8 @Component 9 public class EmployeeExcelVerifyHandler implements IExcelVerifyHandler<Employee> { 10 11 @Autowired 12 private IEmployeeService employeeService; 13 /** 14 * 15 * ExcelVerifyHandlerResult 16 * suceess :代表验证成功还是失败(如果用户名重复，就代表失败) 17 * msg:失败的原因 18 */ 19 @Override 20 public ExcelVerifyHandlerResult verifyHandler(Employee employee) { 21 22 ExcelVerifyHandlerResult result = new ExcelVerifyHandlerResult(true); 23 //如果根据用户名获取到用户，代表这个用户已经存在 24 Employee tempEmp = employeeService.findByUsername(employee.getUsername()); 25 if(tempEmp!=null){ 26 result.setSuccess(false); 27 result.setMsg("用户名重复"); 28 } 29 30 return result; 31 } 32 }
把这个类交给Spring管理(千万不要忘了让SpringMvc去扫描到它)
1 <!--扫描工具包--> 2 <context:component-scan base-package="com.logo.aisell.util"/>
@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获取文件数据 ImportParams params = new ImportParams(); params.setHeadRows(1); params.setNeedVerfiy(true); //设置验证支持 params.setVerifyHandler(employeeExcelVerifyHandler); //设置一个验证处理器 //二.获取excel中的数据，封装成了一个结果对象(有很多东西) ExcelImportResult<Employee> result = ExcelImportUtil.importExcelMore( empFile.getInputStream(), Employee.class, params); //三.获到正确的数据，并把它们保存到数据库 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.如果有错误，把错误数据返回到前台(让前台下载一个错误的excel) //4.1判断是否有错误 if(result.isVerfiyFail()){ //4.2拿到错误的文件薄 Workbook failWorkbook = result.getFailWorkbook(); //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"); //告诉浏览下载的是一个附件，名字叫做error.xlsx response.setHeader("Pragma", "No-cache");//设置不要缓存 OutputStream ouputStream = response.getOutputStream(); failWorkbook.write(ouputStream); ouputStream.flush(); ouputStream.close(); } return "import"; } }
在Maven项目中使用easypoi完成Excel文件上传下载
标签：servlet name xss public NPU frame book common 条件
原文地址：https://www.cnblogs.com/logoman/p/11723309.html
