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CSDN
1.saveFile方法主要是选保存路径,并判断文件是否已存在,list里是从数据库查询到的数据,这里就不写了
2.writeexcel方法负责创建excel,前面4步即可,许多属性默认;并创建数据流处理数据
3.insertCell方法:插入数据到单元格,这里是按行插入数据;如果要按列插入数据,可以把行封装到List里,遍历数据做createRow,并把它添加到List里,在循环遍历插入数据。
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POI导出Excel
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