Controller获取数据导出Excel，详细教程
1：导入对应依赖
<dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-base</artifactId><version>4.1.3</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-web</artifactId><version>4.1.3</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-annotation</artifactId><version>4.1.3</version></dependency>
2：创建实体类 User
public class User {//name代表 表头行 orderNum 代表 排序顺序@Excel(name="姓名",orderNum = "0")private String name;@Excel(name="性别",orderNum = "1")private String sex;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}
创建工具类 FileUtil工具类，固定写法，拿去直接用就可以
package hr.manage.util;
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import org.apache.poi.ss.usermodel.Workbook;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;public class FileUtil {public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,String fileName, HttpServletResponse response){defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));}//设置导出文件内的内容private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) {Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);if (workbook != null);downLoadExcel(fileName, response, workbook);}//设置导出文件名，编码private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {try {response.setCharacterEncoding("UTF-8");//让服务器告诉浏览器它发送的数据属于什么文件类型response.setHeader("content-Type", "application/vnd.ms-excel");//当Content-Type 的类型为要下载的类型时 , 这个信息头会告诉浏览器这个文件的名字和类型。response.setHeader("Content-Disposition","attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));workbook.write(response.getOutputStream());} catch (IOException e) {// throw new NormalException(e.getMessage());}}}
创建UserController
package hr.manage.controller.book;
import hr.manage.entity.User;
import hr.manage.util.FileUtil;
import org.springframework.web.bind.annotation.RequestMapping;import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.List;
//导出数据为Excel
@RequestMapping("/user")
@Controller
public class UserController {@RequestMapping("/excel")public void exceladd(HttpServletResponse response){List<User>list = new ArrayList<>();list.add(new User("张三","男"));list.add(new User("李四","女"));// 参数// 1：传入数据集合，2：标题，3：工作表名称 4：实体类的Class 5：保存的Excel名字，传入HttpServletResponseFileUtil.exportExcel(list,"花名册","员工",User.class,"花名册.xls",response);}
开启tomcat 访问你自己的路径
打开Excel 这时数据已经导到里面了
前面步骤都完成的，现在我们可以改造一下代码，读取数据库中的数据
创建和数据表对应的实体类
package hr.manage.entity;import cn.afterturn.easypoi.excel.annotation.Excel;import java.util.Date;import javax.xml.soap.Detail;public class CwgBookManager {//主键idprivate Integer id;//编号@Excel(name = "编号",orderNum = "0")private String number;//书名@Excel(name = "书名",orderNum = "1")private String name;//图书号@Excel(name = "图书编号",orderNum = "2")private String serialNumber;//出版社@Excel(name = "出版社",orderNum = "3")private String publisher;//作者@Excel(name = "作者",orderNum = "4")private String author;//创建人@Excel(name = "创建人",orderNum = "5")private int createBy;//创建时间@Excel(name = "创建时间",exportFormat ="yyyy-MM-dd", orderNum = "6")private Date creationDate;//册数，数量@Excel(name = "册数",orderNum = "7")private int total;//价格@Excel(name = "价格",orderNum = "8")private double price;//备注，详情@Excel(name = "备注",orderNum = "9")private String detail;
// 状态0：无备案，1，有备案@Excel(name = "备案状态",orderNum = "10",type = 10)private int status;//备用字段1private String reserve;//备用字段2private String spare;//备用字段3private String standby;public Integer getId() {return id;}//getter,setter方法略
}
查询数据库表数据
@Repository
public interface BookDao {/*** 查询book表数据* @return*/@Select("SELECT * FROM cwg_bookmanager")public List<CwgBookManager> findBookList();
编写Controller
package hr.manage.controller.book;
import hr.manage.dao.book.BookDao;
import hr.manage.entity.CwgBookManager;
import hr.manage.util.FileUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
/*** 导出Execl*/
@Controller
@RequestMapping("/hrm/book")
public class ExcelBookController {@Resourceprivate BookDao book;@RequestMapping("/demo")public void execl(HttpServletResponse response) throws IOException {//对应你们查询数据库方法List<CwgBookManager> list = book.findBookList();System.out.println("Excel");FileUtil.exportExcel(list,"图书信息","张三",CwgBookManager.class,"图书.xls",response);}
}
访问该Controller路径即可
打开Excel文件 这是可以看到数据库内的数据都导入到Excel中了
前台页面可以编写一个按钮，绑定一个单击事件
jq代码
function excel(){$.ajax({url:'/HRManagement/hrm/book/demo',type:'get',success:function (data) {if (data != null){alert("导出成功");} }});
}
