Spring MVC - 生成 PDF 示例

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以下示例演示如何使用 Spring Web MVC 框架生成 PDF。首先，让我们准备好一个可用的 Eclipse IDE，并按照以下步骤使用 Spring Web 框架开发基于动态表单的 Web 应用程序。

PDFController.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 PDFController 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.springframework.web.servlet.view.document.AbstractPdfView;

import com.lowagie.text.Document;
import com.lowagie.text.Table;
import com.lowagie.text.pdf.PdfWriter;

public class UserPDFView extends AbstractPdfView {

   protected void buildPdfDocument(Map<String, Object> model, Document document,
      PdfWriter pdfWriter, HttpServletRequest request, HttpServletResponse response)
      throws Exception {
      Map<String,String> userData = (Map<String,String>) model.get("userData");

      Table table = new Table(2);
      table.addCell("Roll No");
      table.addCell("Name");

      for (Map.Entry<String, String> entry : userData.entrySet()) {
         table.addCell(entry.getKey());
         table.addCell(entry.getValue());
      }
      document.add(table);
   }
}

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.PDFController" />

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

视图.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.UserPDFView"></bean>
</beans>

在这里，我们创建了 PDFController 和 UserPDFView。iText 库处理 PDF 文件格式并将数据转换为 PDF 文档。

创建源文件和配置文件后，导出您的应用程序。右键单击您的应用程序，使用Export → WAR File选项并将TestWeb.war文件保存在 Tomcat 的 webapps 文件夹中。

现在，启动 Tomcat 服务器并确保您能够使用标准浏览器从 webapps 文件夹访问其他网页。我们还可以尝试以下 URL - http://localhost:8080/TestWeb/pdf，如果一切按计划进行，我们将看到以下屏幕。