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 }
三.导入验证功能
1 导入验证包支持 pom.xml
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>
2 domain中添加验证方法
注解普通验证
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 }
3:自定义验证
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"/>
4实现验证功能
@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";
}
}