1．Hibernate默认连接池
O6OP =K!t: y`=]T>X&x <?xml version='1.0' encoding='UTF-8'?>
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LIv ctGL-kp <!DOCTYPE hibernate-configuration
GN2Sn` ; lg&t8FHa; PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
p fI"36]F m |G'K[8 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
jB(| ";G 4H/fP]u G I1 <hibernate-configuration>
R~6$oeWAw c??mL4$'N {lc\,F* $ <session-factory >
hzvd t q*>&^V $M RVQh2'w <!?JDBC驱动程序-->
[D4 Es >j QWn@ <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
J7g8D{ 4 \QCJ4}\CS Dbz3;t <!-- 连接数据库的URL-->
^t#&@ -'(d $\U 4hHOo <property name="connection.url">
c-0#w= >o=-$g z` jdbc:mysql://localhost:3306/schoolproject
# }y2)g BG X.U\uc </property>
sdo [D k1D@fiz <property name="connection.useUnicode">true</property>
3(,?S$> RtM8yar+sn <property name="connection.characterEncoding">UTF-8</property>
EU+S^SyZi =aTv! 8</ 1waTTT?"Ho <!--连接的登录名-->
L}pt)w*V1j W@I|Q - <property name="connection.username">root</property>
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K- z.;ez}6%V 71t* % <!?登录密码-->
lp^<3o*1 Ev}C<z k* <property name="connection.password"></property>
TJR:vr fNW"+ <W (O(}p~s <!--是否将运行期生成的SQL输出到日志以供调试-->
jr:7?8cH0L _y}
T/I9 <property name="show_sql">true</property>
bl &nhI)w P&^;656r wLnf@&jQ% <!--指定连接的语言-->
9eQxit7 dx@-/^. <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
m()RU"WY 2HsLc *9{4 ,tu.2VQc@ <!--映射Student这个资源-->
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lM#Ua F}/S:(6LF2 <mapping resource="com/wqbi/model/pojo/student.hbm.xml" />
o9dY9o+Z '$ t I!Z_ [M </session-factory>
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V '|8} z4/g A"dR{8&0 </hibernate-configuration>
Lo N< oj5 T~##,qQ D rY:9[LP 2．C3P0连接配置
]Hefm?9*^ j~jV'f.:H <?xml version='1.0' encoding='UTF-8'?>
=* c7i]@} .7avpOfz <!DOCTYPE hibernate-configuration
#PH~1`vl IS &ZqE(`e PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
NUWDc]@J* =k^Y ?. "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
p o2! %D%8^Z d_ a C \MJ9 <hibernate-configuration>
OX? \<), ij( B,Y TU,s*D&e <session-factory >
m!tbkZHQn0 :2rZcoNb. 8"8t-E#? <!?JDBC驱动程序-->
ol dA#sA$ Ki$MpA3j <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
&-Gqdnc Pama#6?OPh qGB{7-r u <!-- 连接数据库的URL-->
yDegcAn? Kzm+GW3o[ <property name="connection.url">
AicBSqUke 3yU.& k jdbc:mysql://localhost:3306/schoolproject
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oidKT </property>
$Y/9SV, 26I_ YL,S <property name="connection.useUnicode">true</property>
W_\5nF c|B.n] Z <property name="connection.characterEncoding">UTF-8</property>
!h23cj+V IYS)7`{] SwTL|+u <!--连接的登录名-->
}J:U=HJ ,*& :2o_r <property name="connection.username">root</property>
_u5#v0Y $0>60<J %7IugHH9y <!--登录密码-->
p93r'&Q t\k$ };qJ <property name="connection.password"></property>
@ hiCI.?X /'l{E `(ue63AZ <!-- C3P0连接池设定-->
~obqG!2m 4U+xb> <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider
7vrl'^ 1 |Mu p8(gCk </property>
[B#R94 'MUv5 T h <property name="hibernate.c3p0.max_size">20</property>
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%Cs* N~goI #4 <property name="hibernate.c3p0.min_size">5</property>
(_mnB W N `5,\TR2f <property name="hibernate.c3p0.timeout">120</property>
) NXmn95 K /j3a[. <property name="hibernate.c3p0.max_statements">100</property>
A@1W}8qY: bLi j7K 2H <property name="hibernate.c3p0.idle_test_period">120</property>
7Bzq,2s pfA|I*`XV <property name="hibernate.c3p0.acquire_increment">2</property>
4:$4u@ QwJV S(Gs4 N kb|Fd/s <!--是否将运行期生成的SQL输出到日志以供调试-->
G'Q -An%z fT S5 yb% <property name="show_sql">true</property>
*'.|9W `scR*]f1+ #~}nFY. <!--指定连接的语言-->
Wu c S:8#| ZM !CaR <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
_~IR6dKE X0bN3N L tWP0 @JA <!--映射Student这个资源-->
S;3R S; /YP{,#p <mapping resource="com/wqbi/model/pojo/student.hbm.xml" />
sJ;g$TB vj'w m}/ : UGZ+ </session-factory>
Bu<M\w?7Y ;4R$g 5-4X wSzv | \
G </hibernate-configuration>
591>rh ) +7D|4 0=@?ob7 OE_XCZ!5P 3．proxool连接池
b~ KDP+Ri Q] Y* K (1) 先写proxool的配置文件，文件名：proxool.xml（一般放在与hibernate.cfg.xml文件在同一个目录中）本例配置的是MYSQL数据库，数据库的名字为schoolproject
q0i(i.h 8Wrh]egu1 !;&p"E|b# <?xml version="1.0" encoding="UTF-8"?>
R ]}}$R`j ]i &6c <!-- the proxool configuration can be embedded within your own application's.
dt \TQJc~ ck ]Do!h Anything outside the "proxool" tag is ignored. -->
Bg urzS4- d A@]! @|
M|+k3 <something-else-entirely>
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<proxool>
ZXqSH${Tp 8p^bD}lN7 <!--连接池的别名-->
tX9{hC^ 5gH1.7i b <alias>DBPool</alias>
FOv=!'S o I
WTwz!+ d sb `xw <!--proxool只能管理由自己产生的连接-->
fM]+SMZy m'Amli@[ <driver-url>
~bM4[*Q7 yh Yb'GK jdbc:mysql://localhost:3306/schoolproject?useUnicode=true&characterEncoding=UTF8
y6ECdVF A;;fACF8e </driver-url>
0[R L>;D: nF 54tR[ <!?JDBC驱动程序-->
Sz%t JD.. :#LLo}LKp <driver-class>com.mysql.jdbc.Driver</driver-class>
e}D3d=6` ~ZmN44?R <driver-properties>
`> 7; ! A sQ)q <property name="user" value="root"/>
+DW~BS3 #+:9T /*>0 <property name="password" value=""/>
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SL}P </driver-properties>
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K{x\4 <!-- proxool自动侦察各个连接状态的时间间隔(毫秒),侦察到空闲的连接就马上回
w,.+IV $Kk J ][T"K 收,超时的销毁-->
q - W ^0w <house-keeping-sleep-time>90000</house-keeping-sleep-time>
jlkmLc pf G<At_YS 0C = 3dnp6 <!-- 指因未有空闲连接可以分配而在队列中等候的最大请求数,超过这个请求数的
v/Py "hQ 1{r3#MVL 用户连接就不会被接受-->
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ziM{ <maximum-new-connections>20</maximum-new-connections>
h hG4- HD zO~8?jDN4| cGtO
+DE <!-- 最少保持的空闲连接数-->
ta35 K" DwaBdN[!7 <prototype-count>5</prototype-count>
OglEt[ " n)L* aO]ZZleNS <!-- 允许最大连接数,超过了这个连接，再有请求时，就排在队列中等候，最大的
Z8# (kmBdB 1e(E:_t 等待请求数由maximum-new-connections决定-->
P?8GV%0$ H;?{B V <maximum-connection-count>100</maximum-connection-count>
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l )LdP5z- %@wJ`F2a_ <!-- 最小连接数-->
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`1 <minimum-connection-count>10</minimum-connection-count>
GS 0;bI4ay $Wjww- mx qmnZAk </proxool>
!2 LCLN\ NM W#AZVd </something-else-entirely>
jq-p;-i DQNnNsP:M- 3
*d "B tg (2)配置hibernate.cfg.xml文件
?{\nf7Y ^$%S & W <?xml version='1.0' encoding='UTF-8'?>
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wMi 8I-u2Y$Sr <!DOCTYPE hibernate-configuration
`NnUyQ;T Usr@uI#{J PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
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n ST2.:v;lb "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
/mXBvY 6FUw"|\u{ N96jJk <hibernate-configuration>
+EFgE1w g'p K 9 :fOYT$8 <session-factory >
B.wYHNNV *meZ8DV2DH FqkDKTS\& <property name="hibernate.connection.provider_class">
`sUZuWL_ 7Ilm{@ b= org.hibernate.connection.ProxoolConnectionProvider
3Vsc 9B"w #hW;Ju7 3 </property>
nIAx 2dh? 8yRJD[/S <property name="hibernate.proxool.pool_alias">DBPool</property>
r> dwDBE 6Se?sHC> <property name="hibernate.proxool.xml">proxoolconf.xml</property>
fXXr+M or * "R|4"uy Scp7X7{N <!--是否将运行期生成的SQL输出到日志以供调试-->
/,1 D)0 \X<bH&x:z <property name="show_sql">true</property>
e`@ # *}A T:t]"d} } 4F Ek5D <!--指定连接的语言-->
@xQgY*f# *n; !G8\ <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
AcS|c:3MUy O>qll 6]{@ 3Dg,GaRk <!--映射Student这个资源-->
WzAb |&? JCz@s~f\y <mapping resource="com/wqbi/model/pojo/student.hbm.xml" />
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;{n"3< . EpV;xq} P#pn*L*"T </session-factory>
E>&n.% H]Cy=Zi" P6E3-?4j </hibernate-configuration>
bIGHGd nS/)P4z d1T,eJ} (1) hibernate.connection.provider_class定义Hibernate的连接加载类，这里Proxool连接池是用这个，不同的连接池有不同的加载类，可以查阅Hibernate文档获取相关信息
x Ho K o UV5Ie!\nm (2) hibernate.proxool.pool_alias这里就是用我们上面提到的连接池的别名
1lq(PGX)
%F\?R[^5 (3) hibernate.proxool.xml是向Hibernate声明连接池的配置文件位置，可以用相对或绝对路径，用相对路径时要注意一定在要Path范围内！不然会抛出异常。
Acnl^x7Y1 e .]K L(' (4) dialect是声明ＳＱＬ语句的方言
i7]4W GRGzP&}@ (5) show_sql定义是否显示Hibernate生成的ＳＱＬ语言，一般在调试阶段设为true,完成后再改成false，这样有利于调试。
^sa #8^,K jL( qf~c_ (6) <mapping >资源文件映射
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-%2[2p 4． JNDI连接池，数据源已经由应用服务配置好(如Web服务器)，Hibernate需要做的只是通过JNDI名查找到此数据源。应用服务器将连接池对外显示为JNDI绑定数据源，它是javax.jdbc.Datasource类的一个实例。只要配置一个Hibernate文件，如：
4/mig0 "N. >^%7@i:@U hibernate.connection.datasource=java:/comp/env/jdbc/schoolproject //JNDI名
0%,!jW{` z)'M k[ hibernate.transaction.factory_class = org.hibernate.transaction.JTATransactionFactory
n_$
:7J e l2bd
: hibernate.transaction.manager_loopup_class =
xG}(5Tt A{UULVp org.hibernate.transaction.JBossTransactionManagerLookup
y(Y!?X I F_Z- 8>P hibernate.dialect=org.hibernate.dialect.MySQLDialect
;} und*q
