POI匯入匯出

利用poi可以實現excel檔案匯入和匯出功能   本例子結合了springboot做demo

pom檔案

1.8

org.springframework.boot
spring-boot-starter
1.5.4.release
org.springframework.boot
spring-boot-starter-freemarker
1.5.4.release
org.apache.poi
poi3.16
org.apache.poi
poi-ooxml
3.16
org.apache.poi
poi-ooxml-schemas
3.16

@restcontroller

public class democontroller 
if (file.getsize() > 5 * 1024 * 1024) 
filetypeutil.filetype filetype = filetypeutil.getfiletype(file.getinputstream());
//xls_doc --》2007之前的excel型別 xlsx_docx--》 2007之後的excel型別
if (filetype == filetypeutil.filetype.xls_doc) 
logger.info("資料解析成功");
file.getinputstream().close();
return getdata;
} else if (filetype == filetypeutil.filetype.xlsx_docx) 
logger.info("資料解析成功");
//測試資料
listusers = new arraylist();
for (int i = 0; i < 10; i++) 
//獲取模板的工作薄
xssfworkbook workbook = new xssfworkbook(inputstream);
xssfsheet sheetat = workbook.getsheetat(0);
xssfrow row = sheetat.getrow(0);
short rowheight = row.getheight();
xssfrow row1 = null;
xssfcell cell = null;
for (int j = 0; j < users.size(); j++) 
string filename = new string("檔案".getbytes("utf-8"),"iso8859-1");
logger.info("檔名"+filename);
response.setheader("content-disposition", "attachment;filename="+filename+".xlsx");
workbook.write(response.getoutputstream());
response.getoutputstream().flush();
response.getoutputstream().close();
workbook.close();
}//處理2007之前的excel
private listreadoldexcel(hssfworkbook hssfworkbook) 
object objects = new object[row.getlastcellnum()];
for (int j = row.getfirstcellnum(); j < row.getlastcellnum(); j++) 
}//處理資料
if (objects != null) 
}return users;
}//處理2007之後的excel
private listreadexcel(xssfworkbook xssfworkbook) 
object objects = new object[row.getlastcellnum()];
for (int j = row.getfirstcellnum(); j < row.getlastcellnum(); j++) 
//第一行資料
switch (cell.getcelltypeenum()) 
}//處理資料
if (objects != null) 
}return users;
}//處理excel中的 2007之後 ---》獲取 string裡面儲存著 這個的座標
private mapgetexcelpic(xssfworkbook xssfworkbook, xssfsheet xssfsheet) }}
}return map;
}//處理excel中的 2007之前
private mapgetoldexcelpic(hssfworkbook hssfworkbook, hssfsheet hssfsheet) 
}return map;
} else 
}}

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