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,默认第一行为行,Map中的key为,value为对应的单元格值
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,字段值为对应的单元格值
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();
//合并单元格后的行,使用默认样式
writer.merge(row1.size() - 1, "测试");
//一次性写出内容,强制输出
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");
// 合并单元格后的行,使用默认样式
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
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");
// 合并单元格后的行,使用默认样式
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
writer.write(rows, true);
// 关闭writer,释放内存
writer.close();
(4)自定义Bean的key别名(排序)
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了
// 通过工具类创建writer
ExcelWriter writer = ExcelUtil.getWriter("d:/writeBeanTest.xlsx");
//自定义别名
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");
// 合并单元格后的行,使用默认样式
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
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编程网。