OpenCSV 實現CSV的匯入匯出

本文將介紹以下內容

//***********************************====position******************************====//

//通過position形式
//實體內的註解，基於position
@csvbindbyposition
(position =0)
@excel
(iswrap =
false
,name =
"樣例"
,ordernum =
"1",width =30)
private string demo;
public
static
list
readdatafromlocalpathwithposition
(class
clazz, string filepath)
catch
(filenotfoundexception e)}if
(collectionutils.
isnotempty
(parseresult)
)return collections.
emptylist()
;}//***********************************====header******************************====//
@csvcustombindbyname
(column =
"num"
,converter = convertcsvstringtolong.
class
)@excel
(iswrap =
false
,name =
"人數"
,ordernum =
"4",width =20)
private long num;
//convertcsvstringtolong是自定義的型別轉換，僅需要繼承abstractbeanfield即可，自行實現型別的轉換
public
class
convertcsvstringtolong
extends
abstractbeanfield
}//以下讀取時指定編碼utf-8，建議讀取和寫入的時候統一指定編碼，避免出現中文亂碼
public
static
list
readdatafromlocalpathwithheader
(class
clazz, string filepath)
catch
(filenotfoundexception e)
finally
if(fin != null)
}catch
(exception e)}}
if(collectionutils.
isnotempty
(parseresult)
)return collections.
emptylist()
;}

public

static
void
writedatatocsvfile
(list
datalist,class
clazz, string finalpath)))
;// 設定顯示的順序
new()
;settype
(clazz)
;// 寫表頭
csvwriter csvwriter =
newcsvwriter
(writer)
;            statefulbeantocsv
beantocsv =
newstatefulbeantocsvbuilder
(writer)..
withquotechar
(csvwriter.no_quote_character)
.withseparator
(default_biz_seperator)
.withescapechar
('\\').
build()
;            beantocsv.
write
(datalist)
;            csvwriter.
close()
;            writer.
close()
;}catch
(ioexception
| csvdatatypemismatchexception | csvrequiredfieldemptyexception e)
log.
info
("[csvutils][readmodeldatafromlocalpathwithheader]write to csv file successfully ,local path is "
+finalpath)
;}

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