📄 blogjava - water的备忘录 - hibernate的查询方式.mht
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Date: Mon, 16 Jan 2006 21:23:53 +0800
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<HTML><HEAD><TITLE>BlogJava - Water=E7=9A=84=E5=A4=87=E5=BF=98=E5=BD=95 =
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<DIV id=3Dtop>
<H1><A class=3Dheadermaintitle id=3DHeader1_HeaderTitle=20
href=3D"http://www.blogjava.net/waterye/">Water=E7=9A=84=E5=A4=87=E5=BF=98=
=E5=BD=95</A></H1>
<P id=3Dtagline>=E5=8A=AA=E5=8A=9B...</P></DIV>
<DIV id=3Dmain></DIV>
<DIV id=3Dmain>
<DIV class=3Dpost>
<H2><A id=3Dviewpost1_TitleUrl=20
href=3D"http://www.blogjava.net/waterye/archive/2005/08/29/11461.html">Hi=
bernate=E7=9A=84=E6=9F=A5=E8=AF=A2=E6=96=B9=E5=BC=8F</A>=20
</H2><STRONG>=E5=B0=8F=E7=BB=93Hibernate=E7=9A=84=E6=9F=A5=E8=AF=A2=E6=96=
=B9=E5=BC=8F<BR></STRONG><BR>1. get() and load()=20
<DIV=20
style=3D"BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; =
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windowtext 0.5pt solid">
<DIV><IMG =
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop><SPAN style=3D"COLOR: #000000">session.</SPAN><SPAN=20
style=3D"COLOR: #0000ff">get</SPAN><SPAN=20
style=3D"COLOR: #000000">(Clazz, id);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>session.load(Clazz, id);</SPAN></DIV></DIV>
<P><STRONG>=E8=AF=B4=E6=98=8E</STRONG>: =
load()=E4=B8=8Eget()=E7=9A=84=E5=8C=BA=E5=88=AB=20
<BR>=E8=AF=B7=E6=B3=A8=E6=84=8F=E5=A6=82=E6=9E=9C=E6=B2=A1=E6=9C=89=E5=8C=
=B9=E9=85=8D=E7=9A=84=E6=95=B0=E6=8D=AE=E5=BA=93=E8=AE=B0=E5=BD=95=EF=BC=8C=
load()=E6=96=B9=E6=B3=95=E5=8F=AF=E8=83=BD=E6=8A=9B=E5=87=BA=E6=97=A0=E6=B3=
=95=E6=81=A2=E5=A4=8D=E7=9A=84=E5=BC=82=E5=B8=B8(unrecoverable =
exception)=E3=80=82=20
=E5=A6=82=E6=9E=9C=E7=B1=BB=E7=9A=84=E6=98=A0=E5=B0=84=E4=BD=BF=E7=94=A8=E4=
=BA=86=E4=BB=A3=E7=90=86(proxy)=EF=BC=8Cload()=E6=96=B9=E6=B3=95=E4=BC=9A=
=E8=BF=94=E5=9B=9E=E4=B8=80=E4=B8=AA=E6=9C=AA=E5=88=9D=E5=A7=8B=E5=8C=96=E7=
=9A=84=E4=BB=A3=E7=90=86=EF=BC=8C=E7=9B=B4=E5=88=B0=E4=BD=A0=E8=B0=83=E7=94=
=A8=E8=AF=A5=E4=BB=A3=E7=90=86=E7=9A=84=E6=9F=90=E6=96=B9=E6=B3=95=E6=97=B6=
=E6=89=8D=E4=BC=9A=E5=8E=BB=E8=AE=BF=E9=97=AE=E6=95=B0=E6=8D=AE=E5=BA=93=E3=
=80=82=20
=E8=8B=A5=E4=BD=A0=E5=B8=8C=E6=9C=9B=E5=9C=A8=E6=9F=90=E5=AF=B9=E8=B1=A1=E4=
=B8=AD=E5=88=9B=E5=BB=BA=E4=B8=80=E4=B8=AA=E6=8C=87=E5=90=91=E5=8F=A6=E4=B8=
=80=E4=B8=AA=E5=AF=B9=E8=B1=A1=E7=9A=84=E5=85=B3=E8=81=94=EF=BC=8C=E5=8F=88=
=E4=B8=8D=E6=83=B3=E5=9C=A8=E4=BB=8E=E6=95=B0=E6=8D=AE=E5=BA=93=E4=B8=AD=E8=
=A3=85=E8=BD=BD=E8=AF=A5=E5=AF=B9=E8=B1=A1=E6=97=B6=E5=90=8C=E6=97=B6=E8=A3=
=85=E8=BD=BD=E7=9B=B8=E5=85=B3=E8=81=94=E7=9A=84=E9=82=A3=E4=B8=AA=E5=AF=B9=
=E8=B1=A1=EF=BC=8C=E9=82=A3=E4=B9=88=E8=BF=99=E7=A7=8D=E6=93=8D=E4=BD=9C=E6=
=96=B9=E5=BC=8F=E5=B0=B1=E7=94=A8=E5=BE=97=E4=B8=8A=E7=9A=84=E4=BA=86=E3=80=
=82=20
=E5=A6=82=E6=9E=9C=E4=B8=BA=E7=9B=B8=E5=BA=94=E7=B1=BB=E6=98=A0=E5=B0=84=E5=
=85=B3=E7=B3=BB=E8=AE=BE=E7=BD=AE=E4=BA=86batch-size=EF=BC=8C =
=E9=82=A3=E4=B9=88=E4=BD=BF=E7=94=A8=E8=BF=99=E7=A7=8D=E6=93=8D=E4=BD=9C=E6=
=96=B9=E5=BC=8F=E5=85=81=E8=AE=B8=E5=A4=9A=E4=B8=AA=E5=AF=B9=E8=B1=A1=E8=A2=
=AB=E4=B8=80=E6=89=B9=E8=A3=85=E8=BD=BD=EF=BC=88=E5=9B=A0=E4=B8=BA=E8=BF=94=
=E5=9B=9E=E7=9A=84=E6=98=AF=E4=BB=A3=E7=90=86=EF=BC=8C=E6=97=A0=E9=9C=80=E4=
=BB=8E=E6=95=B0=E6=8D=AE=E5=BA=93=E4=B8=AD=E6=8A=93=E5=8F=96=E6=89=80=E6=9C=
=89=E5=AF=B9=E8=B1=A1=E7=9A=84=E6=95=B0=E6=8D=AE=EF=BC=89=E3=80=82 </P>
<P>=E5=A6=82=E6=9E=9C=E4=BD=A0=E4=B8=8D=E7=A1=AE=E5=AE=9A=E6=98=AF=E5=90=A6=
=E6=9C=89=E5=8C=B9=E9=85=8D=E7=9A=84=E8=A1=8C=E5=AD=98=E5=9C=A8=EF=BC=8C=E5=
=BA=94=E8=AF=A5=E4=BD=BF=E7=94=A8get()=E6=96=B9=E6=B3=95=EF=BC=8C=E5=AE=83=
=E4=BC=9A=E7=AB=8B=E5=88=BB=E8=AE=BF=E9=97=AE=E6=95=B0=E6=8D=AE=E5=BA=93=EF=
=BC=8C=E5=A6=82=E6=9E=9C=E6=B2=A1=E6=9C=89=E5=AF=B9=E5=BA=94=E7=9A=84=E8=A1=
=8C=EF=BC=8C=E4=BC=9A=E8=BF=94=E5=9B=9Enull<BR><BR>2. HQL</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%; WORD-BREAK: break-all; PADDING-TOP: 4px; BORDER-BOTTOM: =
windowtext 0.5pt solid">
<DIV><IMG =
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> =E8=BF=94=E5=9B=9E=E4=B8=80=E8=A1=8C=E8=AE=B0=E5=BD=95</SP=
AN><SPAN style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">String hql </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN style=3D"COLOR: =
#000000"> </SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: =
#000000">from TOrder o where o.id =3D ?</SP=
AN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">;<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>TOrder o </SPAN><SPAN style=3D"COLOR: =
#000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000"> (TOrder) s.createQuery(hql)<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop> .setParameter=
(</SPAN><SPAN=20
style=3D"COLOR: #000000">0</SPAN><SPAN=20
style=3D"COLOR: #000000">, orderId)<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop> .uniqueResult=
();<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> =E5=91=BD=E5=90=8D=E5=8F=82=E6=95=B0</SPAN><SPAN =
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">Query q </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000"> sess.createQuery(</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: =
#000000">from DomesticCat cat where cat.name =3D=
:name</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>q.setString(</SPAN><SPAN style=3D"COLOR: =
#000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">name</SPAN><SPAN style=3D"COLOR: =
#000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">, </SPAN><SPAN style=3D"COLOR: =
#000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">Fritz</SPAN><SPAN style=3D"COLOR: =
#000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> =E4=BD=8D=E7=BD=AE=E5=8F=82=E6=95=B0</SPAN><SPAN =
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">Query q </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000"> sess.createQuery(</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: =
#000000">from DomesticCat cat where cat.name =3D=
?</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>q.setString(</SPAN><SPAN style=3D"COLOR: =
#000000">0</SPAN><SPAN=20
style=3D"COLOR: #000000">, </SPAN><SPAN style=3D"COLOR: =
#000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">Izi</SPAN><SPAN style=3D"COLOR: =
#000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> =E5=91=BD=E5=90=8D=E5=8F=82=E6=95=B0=E5=88=97=E8=A1=A8</SP=
AN><SPAN style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">Query q </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000"> sess.createQuery(</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: =
#000000">from DomesticCat cat where cat.name in&=
nbsp;(:namesList)</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>q.setParameterList(</SPAN><SPAN style=3D"COLOR: =
#000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">namesList</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">, names);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000"> =E5=88=86=E9=A1=B5=E6=9F=A5=E8=AF=A2 </SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">Query q </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000"> sess.createQuery(</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: #000000">from DomesticCat cat</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>q.setFirstResult(</SPAN><SPAN style=3D"COLOR: =
#000000">20</SPAN><SPAN=20
style=3D"COLOR: #000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>q.setMaxResults(</SPAN><SPAN style=3D"COLOR: =
#000000">10</SPAN><SPAN=20
style=3D"COLOR: #000000">);<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop>List cats </SPAN><SPAN style=3D"COLOR: =
#000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000"> q.list();</SPAN></DIV></DIV>
<P><BR>3. Criteria</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%; WORD-BREAK: break-all; PADDING-TOP: 4px; BORDER-BOTTOM: =
windowtext 0.5pt solid">
<DIV><IMG =
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop><SPAN style=3D"COLOR: =
#000000">List cats </SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000"> sess.createCriteria(Cat.</SPAN><SPAN=20
style=3D"COLOR: #0000ff">class</SPAN><SPAN style=3D"COLOR: =
#000000">)<BR><IMG=20
src=3D"http://www.blogjava.net/Images/OutliningIndicators/None.gif"=20
align=3Dtop> .add( Restrictions.like(</SPAN><=
SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">name</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
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