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  • Spring MVC-集成(Integration)-生成Excel示例(转载实践)

    以下内容翻译自:https://www.tutorialspoint.com/springmvc/springmvc_excel.htm

    说明:示例基于Spring MVC 4.1.6

    以下示例显示如何使用Spring Web MVC框架生成Excel。首先,让我们使用Eclipse IDE,并按照以下步骤使用Spring Web Framework开发基于动态窗体的Web应用程序:

    描述
    1 创建一个名为TestWeb的项目,在一个包com.tutorialspoint下,如Spring MVC - Hello World Example章节所述。
    2 创建一个Java类UserExcelView,ExcelController下com.tutorialspoint包。
    3 从maven存储库页面下载Apache POI库Apache POI。把它放在你的CLASSPATH中。
    4 最后一步是创建所有源和配置文件的内容并导出应用程序,如下所述。

    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>

    在这里我们创建了一个ExcelController和ExcelView。Apache POI库处理Microsoft Office文件格式,并将数据转换为Excel文档。

    完成创建源文件和配置文件后,导出应用程序。右键单击应用程序并使用Export > WAR File选项,并将您的TestWeb.war文件保存在Tomcat的webapps文件夹中。

    现在启动您的Tomcat服务器,并确保您可以使用标准浏览器从webapps文件夹访问其他网页。现在尝试URL http://localhost:8080/TestWeb/excel,您应该看到以下结果。

    Maven示例:

    https://github.com/easonjim/5_java_example/tree/master/springmvc/tutorialspoint/test30

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  • 原文地址:https://www.cnblogs.com/EasonJim/p/7500418.html
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