📄 7.mht
字号:
=E7=B1=BB=E7=9A=84=E9=9D=99=E6=80=81=E6=88=90=E5=91=98=E4=B8=AD=E3=80=82<=
/P>
<P>=E4=B8=8D=E8=A6=81=E5=B0=86=E6=95=B0=E6=8D=AE=E5=BA=93=E8=BF=9E=E6=8E=A5=
=E5=81=9A=E6=88=90=E5=8D=95=E4=BE=8B=EF=BC=8C=E5=9B=A0=E4=B8=BA=E4=B8=80=E4=
=B8=AA=E7=B3=BB=E7=BB=9F=E5=8F=AF=E8=83=BD=E4=BC=9A=E4=B8=8E=E6=95=B0=E6=8D=
=AE=E5=BA=93=E6=9C=89=E5=A4=9A=E4=B8=AA=E8=BF=9E=E6=8E=A5=EF=BC=8C=E5=B9=B6=
=E4=B8=94=E5=9C=A8=E6=9C=89=E8=BF=9E=E6=8E=A5=E6=B1=A0=E7=9A=84=E6=83=85=E5=
=86=B5=E4=B8=8B=EF=BC=8C=E5=BA=94=E5=BD=93=E5=B0=BD=E5=8F=AF=E8=83=BD=E5=8F=
=8A=E6=97=B6=E9=87=8A=E6=94=BE=E8=BF=9E=E6=8E=A5=E3=80=82Singleton=E6=A8=A1=
=E5=BC=8F=E7=94=B1=E4=BA=8E=E4=BD=BF=E7=94=A8=E9=9D=99=E6=80=81=E6=88=90=E5=
=91=98=E5=AD=98=E5=82=A8=E7=B1=BB=E5=AE=9E=E4=BE=8B=EF=BC=8C=E6=89=80=E4=BB=
=A5=E5=8F=AF=E8=83=BD=E4=BC=9A=E9=80=A0=E6=88=90=E8=B5=84=E6=BA=90=E6=97=A0=
=E6=B3=95=E5=8F=8A=E6=97=B6=E9=87=8A=E6=94=BE=EF=BC=8C=E5=B8=A6=E6=9D=A5=E9=
=97=AE=E9=A2=98=E3=80=82</P>
<H2><BR>=E4=BA=94=E3=80=81 Singleton=E6=A8=A1=E5=BC=8F=E5=9C=A8=E5=AE=
=9E=E9=99=85=E7=B3=BB=E7=BB=9F=E4=B8=AD=E7=9A=84=E5=AE=9E=E7=8E=B0</H2>
<P>=E4=B8=8B=E9=9D=A2=E8=BF=99=E6=AE=B5Singleton=E4=BB=A3=E7=A0=81=E6=BC=94=
=E7=A4=BA=E4=BA=86=E8=B4=9F=E8=BD=BD=E5=9D=87=E8=A1=A1=E5=AF=B9=E8=B1=A1=E3=
=80=82=E5=9C=A8=E8=B4=9F=E8=BD=BD=E5=9D=87=E8=A1=A1=E6=A8=A1=E5=9E=8B=E4=B8=
=AD=EF=BC=8C=E6=9C=89=E5=A4=9A=E5=8F=B0=E6=9C=8D=E5=8A=A1=E5=99=A8=E5=8F=AF=
=E6=8F=90=E4=BE=9B=E6=9C=8D=E5=8A=A1=EF=BC=8C=E4=BB=BB=E5=8A=A1=E5=88=86=E9=
=85=8D=E5=99=A8=E9=9A=8F=E6=9C=BA=E6=8C=91=E9=80=89=E4=B8=80=E5=8F=B0=E6=9C=
=8D=E5=8A=A1=E5=99=A8=E6=8F=90=E4=BE=9B=E6=9C=8D=E5=8A=A1=EF=BC=8C=E4=BB=A5=
=E7=A1=AE=E4=BF=9D=E4=BB=BB=E5=8A=A1=E5=9D=87=E8=A1=A1=EF=BC=88=E5=AE=9E=E9=
=99=85=E6=83=85=E5=86=B5=E6=AF=94=E8=BF=99=E4=B8=AA=E5=A4=8D=E6=9D=82=E7=9A=
=84=E5=A4=9A=EF=BC=89=E3=80=82=E8=BF=99=E9=87=8C=EF=BC=8C=E4=BB=BB=E5=8A=A1=
=E5=88=86=E9=85=8D=E5=AE=9E=E4=BE=8B=E5=8F=AA=E8=83=BD=E6=9C=89=E4=B8=80=E4=
=B8=AA=EF=BC=8C=E8=B4=9F=E8=B4=A3=E6=8C=91=E9=80=89=E6=9C=8D=E5=8A=A1=E5=99=
=A8=E5=B9=B6=E5=88=86=E9=85=8D=E4=BB=BB=E5=8A=A1=E3=80=82</P>
<DIV=20
style=3D"BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; =
BORDER-TOP: windowtext 0.5pt solid; PADDING-LEFT: 5.4pt; BACKGROUND: =
#e6e6e6; PADDING-BOTTOM: 4px; BORDER-LEFT: windowtext 0.5pt solid; =
WIDTH: 98%; PADDING-TOP: 4px; BORDER-BOTTOM: windowtext 0.5pt solid">
<DIV><IMG =
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> Singleton pattern -- Real World e=
xample </SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #000000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #0000ff">using</SPAN><SPAN=20
style=3D"COLOR: #000000"> System;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #0000ff">using</SPAN><SPAN=20
style=3D"COLOR: #000000"> System.Collections;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #0000ff">using</SPAN><SPAN=20
style=3D"COLOR: #000000"> System.Threading;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000"> "Singleton"</SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #0000ff">class</SPAN><SPAN=20
style=3D"COLOR: #000000"> LoadBalancer<BR><IMG=20
id=3DCodehighlighter1_145_1212_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_145_1212_Open_Text.style.display=3D'none'; =
Codehighlighter1_145_1212_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_145_1212_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockSta=
rt.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_145_1212_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_145_1212_Closed_Text.style.display=3D'none'; =
Codehighlighter1_145_1212_Open_Image.style.display=3D'inline'; =
Codehighlighter1_145_1212_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.=
gif"=20
align=3Dtop></SPAN><SPAN id=3DCodehighlighter1_145_1212_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_145_1212_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN style=3D"COLOR: =
#008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000"> Fields</SPAN><SPAN style=3D"COLOR: =
#008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">private</SPAN><SPAN=20
style=3D"COLOR: #000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">static</SPAN><SPAN=20
style=3D"COLOR: #000000"> LoadBalancer balancer;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN style=3D"COLOR: =
#0000ff">private</SPAN><SPAN=20
style=3D"COLOR: #000000"> ArrayList servers </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN style=3D"COLOR: =
#000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">new</SPAN><SPAN=20
style=3D"COLOR: #000000"> ArrayList();<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN style=3D"COLOR: =
#0000ff">private</SPAN><SPAN=20
style=3D"COLOR: #000000"> Random random </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN style=3D"COLOR: =
#000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">new</SPAN><SPAN=20
style=3D"COLOR: #000000"> Random();<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN style=3D"COLOR: =
#008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000"> Constructors (protected)</SPAN><SPAN =
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">protected</SPAN><SPAN=20
style=3D"COLOR: #000000"> LoadBalancer()<BR><IMG=20
id=3DCodehighlighter1_346_537_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_346_537_Open_Text.style.display=3D'none'; =
Codehighlighter1_346_537_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_346_537_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlock=
Start.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_346_537_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_346_537_Closed_Text.style.display=3D'none'; =
Codehighlighter1_346_537_Open_Image.style.display=3D'inline'; =
Codehighlighter1_346_537_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlo=
ck.gif"=20
align=3Dtop> </SPAN><SPAN =
id=3DCodehighlighter1_346_537_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_346_537_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN=20
style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> List of available servers</SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN=20
style=3D"COLOR: =
#000000"> servers.Add( </SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">ServerI</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000"> );<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> servers.Add( </SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">ServerII</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000"> );<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> servers.Add( </SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">ServerIII</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000"> );<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> servers.Add( </SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">ServerIV</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000"> );<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> servers.Add( </SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">ServerV</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000"> );<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlock=
End.gif"=20
align=3Dtop> }</SPAN></SPAN><SPAN style=3D"COLOR: =
#000000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN style=3D"COLOR: =
#008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000"> Methods</SPAN><SPAN style=3D"COLOR: =
#008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">public</SPAN><SPAN=20
style=3D"COLOR: #000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">static</SPAN><SPAN=20
style=3D"COLOR: =
#000000"> LoadBalancer GetLoadBalancer()<BR><IMG=20
id=3DCodehighlighter1_602_1008_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_602_1008_Open_Text.style.display=3D'none'; =
Codehighlighter1_602_1008_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_602_1008_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlock=
Start.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_602_1008_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_602_1008_Closed_Text.style.display=3D'none'; =
Codehighlighter1_602_1008_Open_Image.style.display=3D'inline'; =
Codehighlighter1_602_1008_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlo=
ck.gif"=20
align=3Dtop> </SPAN><SPAN =
id=3DCodehighlighter1_602_1008_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_602_1008_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN=20
style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> Support multithreaded applications through<=
BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN=20
style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> "Double checked locking" pattern which=
avoids<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop> </SPAN><SPAN=20
style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> locking every time the method is&=
nbsp;invoked</SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN=20
style=3D"COLOR: #000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">if</SPAN><SPAN=20
style=3D"COLOR: #000000">( balancer </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D=3D</SPAN><SPAN style=3D"COLOR: =
#000000"> </SPAN><SPAN=20
style=3D"COLOR: #0000ff">null</SPAN><SPAN style=3D"COLOR: =
#000000"> )<BR><IMG=20
id=3DCodehighlighter1_786_983_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_786_983_Open_Text.style.display=3D'none'; =
Codehighlighter1_786_983_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_786_983_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlock=
Start.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_786_983_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_786_983_Closed_Text.style.display=3D'none'; =
Codehighlighter1_786_983_Open_Image.style.display=3D'inline'; =
Codehighlighter1_786_983_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlo=
ck.gif"=20
align=3Dtop> </SPAN><SPAN=20
id=3DCodehighlighter1_786_983_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_786_983_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/Outli⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -