Hutool Java工具类库_ExcelUtil的使用
程序员文章站
2024-01-05 11:02:46
目录hutool java工具类库_excelutil依赖excelutilexcelreaderexcelwriterjava解析excel使用hutool工具类hutool java工具类库_ex...
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。