PlantUML之活動圖

基本語法

每一個普通節點：冒號開頭，分號結尾
活動圖的起始和結尾：start、end或stop

start
:case1;
:case2;
end

條件語句

start
if(predicate?) then (yes)
    :case yes;
else (no)
    :case no;
endif
end

多重條件語句

plaintUML裏沒有switch語法，只能使用elseif代替

start
note right:多分支條件語句，實現switch
if (condition A) then (yes)
  :Text 1;
elseif (condition B) then (yes)
  :Text 2;
  stop
elseif (condition C) then (yes)
  :Text 3;
elseif (condition D) then (yes)
  :Text 4;
else (nothing)
  :Text else;
endif
stop

do while循環

start
note right:do while循環
repeat
  :read data;
  :generate diagrams;
repeat while (more data?) is (yes)
stop

while後面能夠跟is表達式來標識箭頭

while do循環

start
note right:while do循環
while (check filesize ?) is (not empty)
  :read file;
endwhile (empty)
:close file;
end

while後面能夠跟is表達式來標識箭頭
endwhile後跟括號表達式來標識箭頭

並行處理

start
note right:並行處理fork
if (multiprocessor?) then (yes)
  fork
    :Treatment 1;
  fork again
    :Treatment 2;
  end fork
else (monoproc)
  :Treatment 1;
  :Treatment 2;
endif
end

fork換成split，能夠更改樣式

註釋

start
note right:添加註釋
:foo1;
floating note left: This is a note
:foo2;
note right
  This note is on several
  //lines// and can
  contain <b>HTML</b>
  ====
  * Calling the method ""foo()"" is prohibited
end note
stop

一行註釋可在note聲明後跟冒號
多行註釋須要換行，並用end note語句標識結束
浮動註釋可以使用floating關鍵字
note聲明後可標識方位：僅支持left和right
文本格式支持creole wiki語法

節點顏色

start
note right:配置節點顏色
:starting progress;
#HotPink:reading configuration files
These files should edited at this point!;
#AAAAAA:ending of the process;
end

#開頭，可以使用色值或文字描述，須要放在語句前方

箭頭顏色樣式

start
note right:修改箭頭顏色樣式
:foo1;
-> You can put text on arrows;
if (test) then
  -[#blue]->
  :foo2;
  -[#green,dashed]-> The text can
  also be on several lines
  and **very** long...;
  :foo3;
else
  -[#black,dotted]->
  :foo4;
endif
-[#gray,bold]->
:foo5;
end

鏈接器

start
note right:鏈接器
:Some activity;
(A)
detach
(A)
:Other activity;
end

組合

start
note right:組合:定義分區
partition Initialization {
    :read config file;
    :init internal variable;
}
partition Running {
    :wait for user interaction;
    :print information;
}
stop

分離

start
note right:分離
 fork
   :foo1;
   :foo2;
 fork again
   :foo3;
   detach
 endfork
 if (foo4) then
   :foo5;
   detach
 endif
 :foo6;
 detach
 :foo7;
 stop

特殊領域語言

用其餘符號代替分號結尾，可修改節點樣式

• |
• <
• >
• /
• ]
• }

start
note right:特殊領域語言(SDL)
 :Ready;
 :next(o)|
 :Receiving;
 split
  :nak(i)<
  :ack(o)>
 split again
  :ack(i)<
  :next(o)
  on several line|
  :i := i + 1]
  :ack(o)>
 split again
  :err(i)<
  :nak(o)>
 split again
  :foo/
 split again
  :i > 5}
 stop
 end split
 :finish;
 end

泳道

泳道比較特殊，整個代碼必須以泳道標識開頭
相似於節點顏色，在語句前方能夠設置顏色；後設置的顏色會覆蓋以前設置的

|Swimlane1|
start
:foo1;
|#AntiqueWhite|Swimlane2|
:foo2;
:foo3;
|Swimlane1|
:foo4;
|Swimlane2|
:foo5;
stop