Hutool Java工具类库_ExcelUtil的使用
目录
- Hutool Java工具类库_ExcelUtil
- 依赖
- ExcelUtil
- ExcelReader
- ExcelWriter
- java解析Excel使用hutool工具类
Hutool Java工具类库_ExcelUtil
依赖
<!--Hutool Java工具包--> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.4.5</version> </dependency>
ExcelUtil
从文件中读取Excel为ExcelReader
ExcelReader reader = ExcelUtil.getReader(FileUtil.file("test.xlsx"));
从流中读取Excel为ExcelReader
ExcelReader reader = ExcelUtil.getReader(ResourceUtil.getStream("aaa.xlsx"));
读取指定的sheet
ExcelReader reader; //通过sheet编号获取 reader = ExcelUtil.getReader(FileUtil.file("test.xlsx"), 0); //通过sheet名获取 reader = ExcelUtil.getReader(FileUtil.file("test.xlsx"), "sheet1");
ExcelReader
读取Excel中所有行和列,都用列表表示
ExcelReader reader = ExcelUtil.getReader("d:/aaa.xlsx"); List<List<Object>> readAll = reader.read();
读取为Map列表,默认第一行为标题行,Map中的key为标题,value为标题对应的单元格值
ExcelReader reader = ExcelUtil.getReader("d:/aaa.xlsx"); List<Map<String,Object>> readAll = reader.readAll();
读取为Bean列表,Bean中的字段名为标题,字段值为标题对应的单元格值
ExcelReader reader = ExcelUtil.getReader("d:/aaa.xlsx"); List<Person> all = reader.readAll(Person.class);
ExcelWriter
Hutool将Excel写出封装为ExcelWriter,原理为包装了Workbook对象,每次调用merge(合并单元格)或者write(写出数据)方法后只是将数据写入到Workbook,并不写出文件,只有调用flush或者close方法后才会真正写出文件。
由于机制原因,在写出结束后需要关闭ExcelWriter对象,调用close方法即可关闭,此时才会释放Workbook对象资源,否则带有数据的Workbook一直会常驻内存
(1) 将行列对象写出到Excel
List<String> row1 = CollUtil.newArrayList("aa", "bb", "cc", "dd"); List<String> row2 = CollUtil.newArrayList("aa1", "bb1", "cc1", "dd1"); List<String> row3 = CollUtil.newArrayList("aa2", "bb2", "cc2", "dd2"); List<String> row4 = CollUtil.newArrayList("aa3", "bb3", "cc3", "dd3"); List<String> row5 = CollUtil.newArrayList("aa4", "bb4", "cc4", "dd4"); List<List<String>> rows = CollUtil.newArrayList(row1, row2, row3, row4, row5); //通过工具类创建writer ExcelWriter writer = ExcelUtil.getWriter("d:/writeTest.xlsx"); //通过构造方法创建writer //ExcelWriter writer = new ExcelWriter("d:/writeTest.xls"); //跳过当前行,既第一行,非必须,在此演示用 writer.passCurrentRow(); //合并单元格后的标题行,使用默认标题样式 writer.merge(row1.size() - 1, "测试标题"); //一次性写出内容,强制输出标题 writer.write(rows, true); //关闭writer,释放内存 writer.close();
(2)写出Map数据
Map<String, Object> row1 = new LinkedHashMap<>(); row1.put("姓名", "张三"); row1.put("年龄", 23); row1.put("成绩", 88.32); row1.put("是否合格", true); row1.put("考试日期", DateUtil.date()); Map<String, Object> row2 = new LinkedHashMap<>(); row2.put("姓名", "李四"); row2.put("年龄", 33); row2.put("成绩", 59.50); row2.put("是否合格", false); row2.put("考试日期", DateUtil.date()); ArrayList<Map<String, Object>> rows = CollUtil.newArrayList(row1, row2); // 通过工具类创建writer ExcelWriter writer = ExcelUtil.getWriter("d:/writeMapTest.xlsx"); // 合并单元格后的标题行,使用默认标题样式 writer.merge(row1.size() - 1, "一班成绩单"); // 一次性写出内容,使用默认样式,强制输出标题 writer.write(rows, true); // 关闭writer,释放内存 writer.close();
(3)写出Bean数据
public class TestBean { private String name; private int age; private double score; private boolean isPass; private Date examDate; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public double getScore() { return score; } public void setScore(double score) { this.score = score; } public boolean isPass() { return isPass; } public void setPass(boolean isPass) { this.isPass = isPass; } public Date getExamDate() { return examDate; } public void setExamDate(Date examDate) { this.examDate = examDate; } } TestBean bean1 = new TestBean(); bean1.setName("张三"); bean1.setAge(22); bean1.setPass(true); bean1.setScore(66.30); bean1.setExamDate(DateUtil.date()); TestBean bean2 = new TestBean(); bean2.setName("李四"); bean2.setAge(28); bean2.setPass(false); bean2.setScore(38.50); bean2.setExamDate(DateUtil.date()); List<TestBean> rows = CollUtil.newArrayList(bean1, bean2); // 通过工具类创建writer ExcelWriter writer = ExcelUtil.getWriter("d:/writeBeanTest.xlsx"); // 合并单元格后的标题行,使用默认标题样式 writer.merge(4, "一班成绩单"); // 一次性写出内容,使用默认样式,强制输出标题 writer.write(rows, true); // 关闭writer,释放内存 writer.close();
(4)自定义Bean的key别名(排序标题)
在写出Bean的时候,我们可以调用ExcelWriter对象的addHeaderAlias方法自定义Bean中key的别名,这样就可以写出自定义标题了
// 通过工具类创建writer ExcelWriter writer = ExcelUtil.getWriter("d:/writeBeanTest.xlsx"); //自定义标题别名 writer.addHeaderAlias("name", "姓名"); writer.addHeaderAlias("age", "年龄"); writer.addHeaderAlias("score", "分数"); writer.addHeaderAlias("isPass", "是否通过"); writer.addHeaderAlias("examDate", "考试时间"); // 合并单元格后的标题行,使用默认标题样式 writer.merge(4, "一班成绩单"); // 一次性写出内容,使用默认样式,强制输出标题 writer.write(rows, true); // 关闭writer,释放内存 writer.close();
java解析Excel使用hutool工具类
hutool包,真是好用,方便,强烈推荐…
https://hutool.cn/docs/index.html#/
然后使用Excel的工具类,还需要引入poi-ooxml包版本的话,报错里面有
自己确认一下就好了
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.17</version> </dependency>
一行代码搞定:常用的就是read方法了.
ExcelReader reader = ExcelUtil.getReader(FileUtil.file("C:\\Users\\stack\\Desktop\\hanke\\aaa.xlsx"));
以上为个人经验,希望能给大家一个参考,也希望大家多多支持我们。
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