EasyExcel學習筆記

學習easyexcel之前，首先要學習apache poi

1、建立springboot專案，然後匯入依賴.

poi是03版本，然後他的excel結尾是xls

poi-ooxml是07版本，excel結尾是xlsx

>

>
org.apache.poigroupid
>
>
poiartifactid
>
>
3.9version
>
dependency
>
">>
>
>
org.apache.poigroupid
>
>
poi-ooxmlartifactid
>
>
3.9version
>
dependency
>
>
>
joda-timegroupid
>
>
joda-timeartifactid
>
>
2.10.5version
>
dependency
>

hssfworkbook是建立03版本的物件。而07版本的是xssfworkbook

@test

public
static
void
excelwrite03()
throws exception

@test

public
static
void
excelwrite07()
throws exception

static string  path=

"d:\\github\\lucas-poi\\"
;@test
public
static
void
excelread03()
throws exception

@test

public
static
void
excelread07()
throws exception

//hssfworkbook只能處理65536行資料，多了則異常報錯，但是較慢，是03版本

@test
public
void
testwrite03bigdata()
throws exception
} system.out.
println
("over");
fileoutputstream fileoutputstream =
newfileoutputstream
(path +
"testwrite03bigdata.xls");
workbook.
write
(fileoutputstream)
; fileoutputstream.
close()
;long end = system.
currenttimemillis()
; system.out.
println
("時間差:"
+(end-begin)
/1000);
}

//xssfworkbook適合處理大資料，但是較慢，是07版本

@test
public
void
testwrite07bigdata()
throws exception
} system.out.
println
("over");
fileoutputstream fileoutputstream =
newfileoutputstream
(path +
"testwrite07bigdata.xlsx");
workbook.
write
(fileoutputstream)
; fileoutputstream.
close()
;long end = system.
currenttimemillis()
; system.out.
println
("時間差:"
+(end-begin)
/1000);
}

sxssfworkbook是轉變處理大資料的07版本

//sxssfworkbook處理速度非常快

@test
public
void
testwrite07bigdatas()
throws exception
} system.out.
println
("over");
fileoutputstream fileoutputstream =
newfileoutputstream
(path +
"testwrite07bigdatas.xlsx");
workbook.
write
(fileoutputstream)
; fileoutputstream.
close()
;//清除臨時檔案
((sxssfworkbook) workbook)
.dispose()
;long end = system.
currenttimemillis()
; system.out.
println
("時間差:"
+(end-begin)
/1000);
}

>

>
org.projectlombokgroupid
>
>
lombokartifactid
>
dependency
>
>
>
com.alibabagroupid
>
>
easyexcelartifactid
>
>
2.2.0-beta2version
>
dependency
>
>
>
com.alibabagroupid
>
>
fastjsonartifactid
>
>
1.2.55version
>
dependency
>

@data

public
class
demodata

static string  path=

"d:\\github\\lucas-poi\\"
;private list
data()
return list;
}/**
* 最簡單的寫
*/@test
public
void
******write()

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