Java SpringBoot集成文件之如何使用POI导出Word文档
作者:realpdai
这篇文章主要介绍了Java SpringBoot集成文件之如何使用POI导出Word文档,文章围绕主题展开详细的内容介绍,具有一定的参考价值,需要的朋友可以参考一下
前言
通过Apache POI导出excel,而Apache POI包含是操作Office Open XML(OOXML)标准和微软的OLE 2复合文档格式(OLE2)的Java API。所以也是可以通过POI来导出word的。本文主要介绍通过SpringBoot集成POI工具实现Word的导出功能。
知识准备
需要理解Apache POI遵循的标准(Office Open XML(OOXML)标准和微软的OLE 2复合文档格式(OLE2)), 这将对应着API的依赖包。
什么是POI
Apache POI 是用Java编写的免费开源的跨平台的 Java API,Apache POI提供API给Java程序对Microsoft Office格式档案读和写的功能。POI为“Poor Obfuscation Implementation”的首字母缩写,意为“简洁版的模糊实现”。
Apache POI 是创建和维护操作各种符合Office Open XML(OOXML)标准和微软的OLE 2复合文档格式(OLE2)的Java API。更多请参考 官方文档。
实现案例
这里展示SpringBoot集成POI导出用户信息的Word例子。
Pom依赖
引入poi的依赖包
<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>5.2.2</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>5.2.2</version> </dependency>
导出Word
UserController中导出的方法
package tech.pdai.springboot.file.word.poi.controller; import java.io.OutputStream; import javax.servlet.http.HttpServletResponse; import io.swagger.annotations.ApiOperation; import org.apache.poi.xwpf.usermodel.XWPFDocument; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import tech.pdai.springboot.file.word.poi.service.IUserService; /** * @author pdai */ @RestController @RequestMapping("/user") public class UserController { @Autowired private IUserService userService; @ApiOperation("Download Word") @GetMapping("/word/download") public void download(HttpServletResponse response){ try { XWPFDocument document = userService.generateWordXWPFDocument(); response.reset(); response.setContentType("application/vnd.ms-excel"); response.setHeader("Content-disposition", "attachment;filename=user_world_" + System.currentTimeMillis() + ".docx"); OutputStream os = response.getOutputStream(); document.write(os); os.close(); } catch (Exception e) { e.printStackTrace(); } } }
UserServiceImple中导出Word方法
package tech.pdai.springboot.file.word.poi.service.impl; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.math.BigInteger; import java.util.ArrayList; import java.util.List; import lombok.extern.slf4j.Slf4j; import org.apache.poi.openxml4j.exceptions.InvalidFormatException; import org.apache.poi.util.Units; import org.apache.poi.xwpf.usermodel.BreakType; import org.apache.poi.xwpf.usermodel.Document; import org.apache.poi.xwpf.usermodel.ParagraphAlignment; import org.apache.poi.xwpf.usermodel.XWPFDocument; import org.apache.poi.xwpf.usermodel.XWPFParagraph; import org.apache.poi.xwpf.usermodel.XWPFRun; import org.apache.poi.xwpf.usermodel.XWPFTable; import org.apache.poi.xwpf.usermodel.XWPFTableCell; import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTTblPr; import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTTblWidth; import org.springframework.core.io.ClassPathResource; import org.springframework.core.io.Resource; import org.springframework.stereotype.Service; import tech.pdai.springboot.file.word.poi.entity.User; import tech.pdai.springboot.file.word.poi.service.IUserService; /** * @author pdai */ @Slf4j @Service public class UserServiceImpl implements IUserService { @Override public XWPFDocument generateWordXWPFDocument(){ XWPFDocument doc = new XWPFDocument(); // Title createTitle(doc, "Java 全栈知识体系"); // Chapter 1 createChapterH1(doc, "1. 知识准备"); createChapterH2(doc, "1.1 什么是POI"); createParagraph(doc, "Apache POI 是创建和维护操作各种符合Office Open XML(OOXML)标准和微软的OLE 2复合文档格式(OLE2)的Java API。用它可以使用Java读取和创建,修改MS Excel文件.而且,还可以使用Java读取和创建MS Word和MSPowerPoint文件。更多请参考[官方文档](https://poi.apache.org/index.html)"); createChapterH2(doc, "1.2 POI中基础概念"); createParagraph(doc, "生成xls和xlsx有什么区别?POI对Excel中的对象的封装对应关系?"); // Chapter 2 createChapterH1(doc, "2. 实现案例"); createChapterH2(doc, "2.1 用户列表示例"); createParagraph(doc, "以导出用户列表为例"); // 表格 List<User> userList = getUserList(); XWPFParagraph paragraph = doc.createParagraph(); XWPFTable table = paragraph.getDocument().createTable(userList.size(), 5); table.setWidth(500); table.setCellMargins(20, 20, 20, 20); //表格属性 CTTblPr tablePr = table.getCTTbl().addNewTblPr(); //表格宽度 CTTblWidth width = tablePr.addNewTblW(); width.setW(BigInteger.valueOf(8000)); for(int i = 0; i< userList.size(); i++) { List<XWPFTableCell> tableCells = table.getRow(i).getTableCells(); tableCells.get(0).setText(userList.get(i).getId()+""); tableCells.get(1).setText(userList.get(i).getUserName()); tableCells.get(2).setText(userList.get(i).getEmail()); tableCells.get(3).setText(userList.get(i).getPhoneNumber()+""); tableCells.get(4).setText(userList.get(i).getDescription()); } createChapterH2(doc, "2.2 图片导出示例"); createParagraph(doc, "以导出图片为例"); // 图片 InputStream stream = null; try { XWPFParagraph paragraph2 = doc.createParagraph(); Resource resource = new ClassPathResource("pdai-guli.png"); stream = new FileInputStream(resource.getFile()); XWPFRun run = paragraph2.createRun(); run.addPicture(stream, Document.PICTURE_TYPE_PNG, "Generated", Units.toEMU(256), Units.toEMU(256)); } catch (IOException | InvalidFormatException e) { e.printStackTrace(); } return doc; } private void createTitle(XWPFDocument doc, String content){ XWPFParagraph title = doc.createParagraph(); title.setAlignment(ParagraphAlignment.CENTER); XWPFRun r1 = title.createRun(); r1.setBold(true); r1.setFontFamily("宋体"); r1.setText(content); r1.setFontSize(22); } private void createChapterH1(XWPFDocument doc, String content){ XWPFParagraph actTheme = doc.createParagraph(); actTheme.setAlignment(ParagraphAlignment.LEFT); XWPFRun runText1 = actTheme.createRun(); runText1.setBold(true); runText1.setText(content); runText1.setFontSize(18); } private void createChapterH2(XWPFDocument doc, String content){ XWPFParagraph actType = doc.createParagraph(); XWPFRun runText2 = actType.createRun(); runText2.setBold(true); runText2.setText(content); runText2.setFontSize(15); } private void createParagraph(XWPFDocument doc, String content){ XWPFParagraph actType = doc.createParagraph(); XWPFRun runText2 = actType.createRun(); runText2.setText(content); runText2.setFontSize(11); } private List<User> getUserList(){ List<User> userList = new ArrayList<>(); for (int i = 0; i < 5; i++) { userList.add(User.builder() .id(Long.parseLong(i + "")).userName("pdai" + i).email("pdai@pdai.tech" + i).phoneNumber(121231231231L) .description("hello world" + i) .build()); } return userList; } }
导出:
导出后的word:
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