Springmvc 简明教程

Spring MVC - Generate Excel Example

以下示例展示如何使用 Spring Web MVC 框架生成 Excel。首先，让我们有一个正在运行的 Eclipse IDE，并坚持以下步骤以使用 Spring Web 框架开发一个可动态创建表单的 Web 应用程序。

Step

Description

1

如 Spring MVC 的 Hello World 章节中所述，在 com.tutorialspoint 包下创建一个以 TestWeb 命名的项目。

2

在 com.tutorialspoint package 下创建 Java 类 UserExcelView 和 ExcelController。

3

从 Maven 存储库页面下载 Apache POI 库 Apache POI 。将它放入 CLASSPATH 中。

4

最后一步是创建源文件和配置文件的内容，然后按如下所述导出应用程序。

ExcelController.java

package com.tutorialspoint;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

public class ExcelController extends AbstractController {

   @Override
   protected ModelAndView handleRequestInternal(HttpServletRequest request,
      HttpServletResponse response) throws Exception {
      //user data
      Map<String,String> userData = new HashMap<String,String>();
      userData.put("1", "Mahesh");
      userData.put("2", "Suresh");
      userData.put("3", "Ramesh");
      userData.put("4", "Naresh");
      return new ModelAndView("UserSummary","userData",userData);
   }
}

UserExcelView.java

package com.tutorialspoint;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.springframework.web.servlet.view.document.AbstractExcelView;

public class UserExcelView extends AbstractExcelView {

   @Override
   protected void buildExcelDocument(Map<String, Object> model,
      HSSFWorkbook workbook, HttpServletRequest request, HttpServletResponse response)
      throws Exception {
      Map<String,String> userData = (Map<String,String>) model.get("userData");
      //create a wordsheet
      HSSFSheet sheet = workbook.createSheet("User Report");

      HSSFRow header = sheet.createRow(0);
      header.createCell(0).setCellValue("Roll No");
      header.createCell(1).setCellValue("Name");

      int rowNum = 1;
      for (Map.Entry<String, String> entry : userData.entrySet()) {
         //create the row data
         HSSFRow row = sheet.createRow(rowNum++);
         row.createCell(0).setCellValue(entry.getKey());
         row.createCell(1).setCellValue(entry.getValue());
      }
   }
}

TestWeb-servlet.xml

<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:context = "http://www.springframework.org/schema/context"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xmlns:mvc = "http://www.springframework.org/schema/mvc"
   xsi:schemaLocation = "
   http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.0.xsd
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

   <bean class = "org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />

   <bean class = "com.tutorialspoint.ExcelController" />

   <bean class = "org.springframework.web.servlet.view.XmlViewResolver">
      <property name = "location">
         <value>/WEB-INF/views.xml</value>
      </property>
   </bean>
</beans>

views.xml

<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:context = "http://www.springframework.org/schema/context"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "
   http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">

   <bean id = "UserSummary" class = "com.tutorialspoint.UserExcelView"></bean>
</beans>

我们在此处创建了一个 ExcelController 和一个 ExcelView。Apache POI 库用于处理 Microsoft Office 文件格式，它会将数据转换为一个 excel 文档。

一旦你创建完资源文件和配置文件，导出你的应用程序。右键点击你的应用程序，使用 Export → WAR File 选项并在Tomcat的webapps文件夹中保存 TestWeb.war 文件。

现在，启动 Tomcat 服务器并确保你能够使用标准浏览器从 webapps 文件夹访问其他网页。尝试 http://localhost:8080/TestWeb/excel URL，我们将看到下面的屏幕。

spring excel result