用标准JDBC连接方式开发AJAX WebShop的后台服务
时间：2008-04-01 来源：剑心通明
JoyiStar的AJAX WebShop虽然是很经典的AJAX IDE，可是文档和示例却比较少，我们是用Java做供销链管理系统的，使用的数据库是mysql，WebShop的示例是用的access，搞不懂他们为什么用这个微软的垃圾数据库，用mysql多好呀，例子倒是很容易跑起来，只要打开projects目录下面的工程，有Java的示例，C#的和VB的，.NET的我用不上，也没有仔细看，打开java_example工程，有个index.htm，打开后，从菜单上启动web server，然后RUN就OK了，例子倒是做得很漂亮，XP 风格的，不知道能不能换肤，有空再研究下，先看看我最关心的数据库操作，找到了simple.htm，打开后似乎是一个单表及数据表格、输入控件的功能，看了下，原来有个DataSet的控件，是用来连接后台数据的，应该是DataSource属性设置了Java类名，因为我在左边工程树里找到了demo包和Simple类： b; DarT
1
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=780) window.open('http://bbs.tech.ccidnet.com/attachment/Mon_0612/30_504795_dc0ed05bb6bb231.jpg');" src="http://bbs.tech.ccidnet.com/attachment/Mon_0612/30_504795_dc0ed05bb6bb231.jpg" onload="javascript:if(this.width>'780')this.width='780';setTimeout('if(document.getElementById(\'http://bbs.tech.ccidnet.com/attachment/Mon_0612/30_504795_dc0ed05bb6bb231.jpg\').height>\'700\')document.getElementById(\'http://bbs.tech.ccidnet.com/attachment/Mon_0612/30_504795_dc0ed05bb6bb231.jpg\').height=\'700\';',500);" border=0> &@ tLu]Cx
可是当我打开这个文件，却发现只有这么几行代码，似乎这玩意封装了数据库访问，看方法的名字query_XML是取数据，update_XML是保存数据，是覆盖BusinessObjectBean的接口： Th~a|c4Z
import joyistar.eip.db.*; F @\)1@=
import joyistar.eip.bs.*; Z%A16c`M
import joyistar.eip.vo.*; r 18WV}g
6aL#kM;Q
public class Simple extends BusinessObjectBean { I %r?\i
private String dbName = "demo"; 5^(LwNf6
private String SQL = "select * from product"; g2z*oi%>
private String tableName = "product"; T|BVY(wKUm
#a|MhxvHS
public Simple() { L?;/\ !On}
} 8@Z|SD@O
g ;Tzq /
public joyistar.eip.vo.XmlRequest query_XML(joyistar.eip.vo.XmlRequest xmlRequest) throws Exception { /D;06 oOle
xmlRequest.SetDatabase(dbName); A {il792
xmlRequest.SetSQL(SQL); R oiPe\
return super.query_XML(xmlRequest); yK6h20f5
} Sk?:Zr8Xe
.] 0>,9f a
public joyistar.eip.vo.XmlPost update_XML(joyistar.eip.vo.XmlPost xmlPost) throws Exception { Y={W;X|
xmlPost.SetDatabase(dbName); WvaZ^A2W
xmlPost.SetTableName(tableName); U-`zeqX%
return super.update_XML(xmlPost); <r5BIc&
} .w#(F5W-Mt
.;8\_;'e"
} ]ZDt
我找了半天，才找到有个dbconfig.xml文件，看名字就知道是配置数据库连接了，可是打开一看，却只有access,oracle,sqlserver的例子，试着改成mysql的连接串，却报连接失败的错误，看来它是不支持mysql了。 i/75YK
<?xml version="1.0" encoding="GBK"?> X"c]`;f#
<connectPools> Z4:QCM T!
<datasource> ~936D1ih1
<dataSourceName>demo</dataSourceName> RHD3%{]\^
<driverClassName>sun.jdbc.odbc.JdbcOdbcDriver</driverClassName> s%!<CK4
<databaseUrl>jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=database/demo.mdb</databaseUrl> i}s4QZ[
<user/> b`= pFk
<password/> ef:]yZy~
<maxCon>20</maxCon> +DqgKcZ%0
<databaseType>joyistar.eip.db.AccessSQL</databaseType> 2Jq0t[Q
<timeOut>20</timeOut> mkDfA3{x|N
<initCount>2</initCount> ~[}|:fMd
<timeOutFree>10</timeOutFree> cw{;piM(
<option/> 777@VCSJ2
</datasource> qYzUG3
<!-- <datasource> yVbO@g0
<dataSourceName>demo</dataSourceName> $@)1a~J6
<driverClassName>oracle.jdbc.driver.OracleDriver</driverClassName> 8Mx 3`I ;}
<databaseUrl>jdbc:oracle:thin:@localhost:1521:oa</databaseUrl> 3?+Z!`$YT
<user>system</user> K^b_8F9wt
<password>system</password> >j71KE6
<maxCon>20</maxCon> S+"%dWZ
<databaseType>joyistar.eip.db.OracleSQL</databaseType> H348oZe j
<timeOut>20</timeOut> 9;OV!2C23
<initCount>2</initCount> v'L(E2fQT
<timeOutFree>10</timeOutFree> ?/q^pgJ
<option/> X aP;Wd^
</datasource> 8I2,y)JHM
--> d"ae{;~t5
<!-- O[[E^`a
<datasource> Z!wML (n
<dataSourceName>demo</dataSourceName> K WG@/kgv
<driverClassName>com.microsoft.jdbc.sqlserver.SQLServerDriver</driverClassName> x0M3`
<databaseUrl>jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=demo;SelectMethod=Cursor</databaseUrl> ]/AYT%G,
<user>sa</user> ]_czFM(=O
<password>sa</password> JW tHi}3T
<maxCon>20</maxCon> }w35vbW
<databaseType>joyistar.eip.db.SQLServerSQL</databaseType> OJz#g
<timeOut>20</timeOut> lg>CV:R
<initCount>5</initCount> |Q } ;9
<timeOutFree>10</timeOutFree> $O|.2a\
<option/> q 22AT*h
</datasource> F/jf,R^M~
--> X"tS3?UH_
<logFile> &"H! B/4
<filename>dblog.log</filename> 5)9>F'qXP,
<filesize>10M</filesize> ?y,!,X 0
</logFile> |X?0l1;QW
</connectPools> #(]9+CL/GC
正在失望的时候，看到demo包里有个Simple_ResultSet的例子，打开看了看，哈哈，原来除了他们封装了数据库连接，也提供了标准的JDBC连接方式，这个例子是这样的： 9R,gMr
package demo; Qx|m^RqU
<I(&s*}<
/** Ewl `
* <p>Title: </p> 8tME
* <p>Description: </p> H G A=R
* <p>Copyright: Copyright (c) </p> {$4ij|U
* <p>Company: </p> ggvj6hf
* @author not attributable zK"Y:v
* @version 1.0 48[ 6>g]
*/ kNm|p3@
r0?$*?_
import joyistar.eip.bs.*; K7@6{i
import joyistar.eip.vo.*; _! Y{5
import java.sql.*; znjuy "
D-~OZcGT
public class Simple_ResultSet extends BusinessObjectBean { 7aL ~JN
String drivers="sun.jdbc.odbc.JdbcOdbcDriver"; n/T:?4*\
String username=""; $u<\J*z|3M
String password=""; L64!M
String url="jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=demo.mdb"; M-g{h%7$
)v;|#
public Simple_ResultSet() { F<KR&Z-
} ni|')YA&l[
r C,ys(
public joyistar.eip.vo.XmlRequest query_XML(joyistar.eip.vo.XmlRequest xmlRequest) throws Exception { `o" =N:mi
Connection conn = null; 7L~71Ce(F<
String sql = ""; W_b(]JH l
java.sql.Statement stmt = null; m^i5$_HOd
ResultSet rs = null; \wm.OU?&a\
ResultSetMetaData rsmd= null; fy+np6j
int rowCount; 6o ?xC
int maxRow; P5jN"% Z
int recNo; f+vLcXx]I
try{ "{WB&h:hX
System.setProperty("jdbc.drivers",drivers); "Q7Ft.UP
conn=DriverManager.getConnection(url,username,password); bI {a[e0K
maxRow=xmlRequest.MaxRows; ~rX=@f t
recNo=xmlRequest.RecNo; 6#&% 1 [@
sql="select * from PRODUCT"; "Nez'
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); .J+!m1Cn
rs = stmt.executeQuery(sql); aEAz/zZ
rsmd=rs.getMetaData(); TI#8!?ZF
rs.last(); WLfP(igT
rowCount=rs.getRow(); Z>|:s_P<\t
xmlRequest.SetRecordCount(rowCount); ~5@M,
for(int i=1;i<=rsmd.getColumnCount();i++) { 3mmBx O6O<
if(rsmd.getColumnTypeName(i).equals("STRING")) { WH0 XRwlt
xmlRequest.AddField(rsmd.getColumnName(i),rsmd.getColumnTypeName(i),rsmd.getPrecision(i)); nx|X{a%!
} nk)}Jz%>9
else { Q'a ';/b
xmlRequest.AddField(rsmd.getColumnName(i),rsmd.getColumnTypeName(i)); =s#@NgkF
} ]J/BS{j7
} LHF4Om}
for(int i=1;i<=maxRow;i++) { zw%
if(recNo+i>rowCount) { GLUg\U*m
break; ]$7" 2D
} Z~G2EEyQ o
else { ZK.rt)
rs.absolute(recNo+i); wQ}edq "K5
xmlRequest.Append(); EAST?
for(int j=1;j<=rsmd.getColumnCount();j++) { w;"V&@}mH
xmlRequest.SetValue(rsmd.getColumnName(j), rs.getString(j)); DB}4"4)^
} jQ<3<k8
} 'yOJ1`s(,H
} +7 t-^{t
} catch(Exception e) { e][ bD
xmlRequest.Error=e.getMessage(); ]:`'T,Uc
} finally { X-##cVw,L
if(rs != null) f\&ZSwT
rs.close(); 9n&Sjd4
if(stmt != null) f"N1w,ARF[
stmt.close(); 'W{J"?w`
if(conn != null) u`:B#4
conn.close(); FAC ^E1=
} ]/A: T{
return xmlRequest; "Vy/m3P\
} ojO yl]@
O=9VJdv
X@}} 3tA
\Od4iMu
public joyistar.eip.vo.XmlPost update_XML(joyistar.eip.vo.XmlPost xmlPost) throws Exception { N1 5LYb
Connection conn = null; UC"2ZL[R
java.sql.Statement stmt = null; d |4*$5o
ResultSet rs = null; GkDTQ
ResultSetMetaData rsmd =null; }z`OaD
String acttype = null; //action type k%5;~`mZ
XmlAction action = null; //an action o6D|[ 2:
String sql = null; 2N6nQ
String where = null; `BYch-
try { '{F rUlB
System.setProperty("jdbc.drivers",drivers); !.a $sc m
conn=DriverManager.getConnection(url,username,password); }h63G <4
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); O0ce"Sy1
conn.setAutoCommit(false); {3e tV(b|5
for(int i = 0;i<xmlPost.Actions.size();i++) { Q-(a|Dj
action = xmlPost.GetAction(i); \?wa^-#3
acttype = action.ActionType; 1!pjwr
if(acttype.equals("old")) { //where acton, then update or delete action after it; akY2%YH
where = " where "; %q\-UH@Fn
where = where+"PRODUCT_ID='"+action.getField("PRODUCT_ID").Value+"'"; kR},8
} >U qs\c o
if(acttype.equals("update")){ 7V2`#LE|
String set = " set "; 3ar!{a#n
for(int j=0;j<action.getFieldCount();j++) { 9-Cr85Gm
if(action.getField(j).Name.equals("PRODUCT_PRICE")) { ^S)1IW\u
set = set+action.getField(j).Name+"="+action.getField(j).Value; V37f'el)
} 5"S2 [ s
else { |qbqf.
set = set+action.getField(j).Name+"='"+action.getField(j).Value+"'"; .]B^[#
} 9:U:&^V
if(j<action.getFieldCount()-1) { &9n3$nW
set = set+ "," ; omWwKNPg
} &q]Yk ]BJ
} HpGS}3f2
sql="update product"+set+where; {`h&q uQ
stmt.executeUpdate(sql); ?FF -N>
} a44q*{T
if(acttype.equals("delete")){ Q=5Xbe
where = " where "; @w +;Q oQ
where = where+action.getField("PRODUCT_ID").Name+"='"+action.getField("PRODUCT_ID").Value+"'"; B 0G`V#q%n
sql = "delete from product"+where; p08g.HzP
stmt.executeUpdate(sql); 5NM1*d^/h
} mNos/i%_h
if(acttype.equals("insert")){ PwToe5iP
String field = new String(); eTv_4F++
String value = new String(); CQqM[`)w!
for(int j=0;j<action.getFieldCount();j++) { YyE4Qjx
field = field+action.getField(j).Name; @$V9^c+BL]
if(action.getField(j).Name.equals("PRODUCT_PRICE")) { q7f0B3gdn
value = value+action.getField(j).Value; x0{M
} (8G<s7X%
else { ;\PLR4ZLS
value=value+"'"+action.getField(j).Value+"'"; |A1 &?
} X2Ge"d~o^
if(j<action.getFieldCount()-1) { yDvzMIN1
field = field+ "," ; d0?Tq
value = value+","; a~o&E ?
} =]-@D;nh
} QU~VY
sql="insert into product ("+field+") values ("+value+")"; } GSFXXvr
stmt.executeUpdate(sql); .N5S5]\
} 9t-/(
} si;V&2o(g
conn.commit(); 8v^8;U\#
} catch(Exception e) { k[~9?u*t
xmlPost.Error=e.getMessage(); ?ccPeu
} finally { MEhm}=k6
if(rs != null) u 2^R1Ap-
rs.close(); R p4ZiR^p+
if(stmt != null) !h S[8 )v
stmt.close(); asevn#g
if(conn != null) \eS\ p
conn.close(); nzadFEnoD
} [QaITUIHv
return xmlPost; )hEfK2>ID
} sH{cukp)
#,7a.+(t
} #LmP1yh
*,?:7N
同样query_XML是取数据，update_XML是保存数据，是覆盖BusinessObjectBean的接口，只不过这个例子使用了标准JDBC连接数据库，虽然代码复杂好多，不过仔细一看，不难理解，我马上做了个测试，修改了以下代码，同时把jdbc-odbc连接改成了我的jdbc连接方式的代码： FV%/f1n
aD||x:
String drivers="org.gjt.mm.mysql.Driver"; ^\6u&o$>]
String username="root"; tVT<J(
String password="root"; _ ^>i"fQal
String url=" jdbc:mysql://localhost:3306/mysql1"; 4:o6Er'L
String sql=”select * from stores”; qr z,D
4z&2>RBN
搞完这些，用Build编译，然后运行页面，哈哈，居然成功了。Update好像有点复杂，偶还在研究中，似乎是有几个标记操作类型的old,insert,update,delete,然后根据这些拼装SQL，等我试好了发上来。
1
2
可是当我打开这个文件，却发现只有这么几行代码，似乎这玩意封装了数据库访问，看方法的名字query_XML是取数据，update_XML是保存数据，是覆盖BusinessObjectBean的接口： Th~a|c4Z
import joyistar.eip.db.*; F @\)1@=
import joyistar.eip.bs.*; Z%A16c`M
import joyistar.eip.vo.*; r 18WV}g
6aL#kM;Q
public class Simple extends BusinessObjectBean { I %r?\i
private String dbName = "demo"; 5^(LwNf6
private String SQL = "select * from product"; g2z*oi%>
private String tableName = "product"; T|BVY(wKUm
#a|MhxvHS
public Simple() { L?;/\ !On}
} 8@Z|SD@O
g ;Tzq /
public joyistar.eip.vo.XmlRequest query_XML(joyistar.eip.vo.XmlRequest xmlRequest) throws Exception { /D;06 oOle
xmlRequest.SetDatabase(dbName); A {il792
xmlRequest.SetSQL(SQL); R oiPe\
return super.query_XML(xmlRequest); yK6h20f5
} Sk?:Zr8Xe
.] 0>,9f a
public joyistar.eip.vo.XmlPost update_XML(joyistar.eip.vo.XmlPost xmlPost) throws Exception { Y={W;X|
xmlPost.SetDatabase(dbName); WvaZ^A2W
xmlPost.SetTableName(tableName); U-`zeqX%
return super.update_XML(xmlPost); <r5BIc&
} .w#(F5W-Mt
.;8\_;'e"
} ]ZDt
我找了半天，才找到有个dbconfig.xml文件，看名字就知道是配置数据库连接了，可是打开一看，却只有access,oracle,sqlserver的例子，试着改成mysql的连接串，却报连接失败的错误，看来它是不支持mysql了。 i/75YK
<?xml version="1.0" encoding="GBK"?> X"c]`;f#
<connectPools> Z4:QCM T!
<datasource> ~936D1ih1
<dataSourceName>demo</dataSourceName> RHD3%{]\^
<driverClassName>sun.jdbc.odbc.JdbcOdbcDriver</driverClassName> s%!<CK4
<databaseUrl>jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=database/demo.mdb</databaseUrl> i}s4QZ[
<user/> b`= pFk
<password/> ef:]yZy~
<maxCon>20</maxCon> +DqgKcZ%0
<databaseType>joyistar.eip.db.AccessSQL</databaseType> 2Jq0t[Q
<timeOut>20</timeOut> mkDfA3{x|N
<initCount>2</initCount> ~[}|:fMd
<timeOutFree>10</timeOutFree> cw{;piM(
<option/> 777@VCSJ2
</datasource> qYzUG3
<!-- <datasource> yVbO@g0
<dataSourceName>demo</dataSourceName> $@)1a~J6
<driverClassName>oracle.jdbc.driver.OracleDriver</driverClassName> 8Mx 3`I ;}
<databaseUrl>jdbc:oracle:thin:@localhost:1521:oa</databaseUrl> 3?+Z!`$YT
<user>system</user> K^b_8F9wt
<password>system</password> >j71KE6
<maxCon>20</maxCon> S+"%dWZ
<databaseType>joyistar.eip.db.OracleSQL</databaseType> H348oZe j
<timeOut>20</timeOut> 9;OV!2C23
<initCount>2</initCount> v'L(E2fQT
<timeOutFree>10</timeOutFree> ?/q^pgJ
<option/> X aP;Wd^
</datasource> 8I2,y)JHM
--> d"ae{;~t5
<!-- O[[E^`a
<datasource> Z!wML (n
<dataSourceName>demo</dataSourceName> K WG@/kgv
<driverClassName>com.microsoft.jdbc.sqlserver.SQLServerDriver</driverClassName> x0M3`
<databaseUrl>jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=demo;SelectMethod=Cursor</databaseUrl> ]/AYT%G,
<user>sa</user> ]_czFM(=O
<password>sa</password> JW tHi}3T
<maxCon>20</maxCon> }w35vbW
<databaseType>joyistar.eip.db.SQLServerSQL</databaseType> OJz#g
<timeOut>20</timeOut> lg>CV:R
<initCount>5</initCount> |Q } ;9
<timeOutFree>10</timeOutFree> $O|.2a\
<option/> q 22AT*h
</datasource> F/jf,R^M~
--> X"tS3?UH_
<logFile> &"H! B/4
<filename>dblog.log</filename> 5)9>F'qXP,
<filesize>10M</filesize> ?y,!,X 0
</logFile> |X?0l1;QW
</connectPools> #(]9+CL/GC
正在失望的时候，看到demo包里有个Simple_ResultSet的例子，打开看了看，哈哈，原来除了他们封装了数据库连接，也提供了标准的JDBC连接方式，这个例子是这样的： 9R,gMr
package demo; Qx|m^RqU
<I(&s*}<
/** Ewl `
* <p>Title: </p> 8tME
* <p>Description: </p> H G A=R
* <p>Copyright: Copyright (c) </p> {$4ij|U
* <p>Company: </p> ggvj6hf
* @author not attributable zK"Y:v
* @version 1.0 48[ 6>g]
*/ kNm|p3@
r0?$*?_
import joyistar.eip.bs.*; K7@6{i
import joyistar.eip.vo.*; _! Y{5
import java.sql.*; znjuy "
D-~OZcGT
public class Simple_ResultSet extends BusinessObjectBean { 7aL ~JN
String drivers="sun.jdbc.odbc.JdbcOdbcDriver"; n/T:?4*\
String username=""; $u<\J*z|3M
String password=""; L64!M
String url="jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=demo.mdb"; M-g{h%7$
)v;|#
public Simple_ResultSet() { F<KR&Z-
} ni|')YA&l[
r C,ys(
public joyistar.eip.vo.XmlRequest query_XML(joyistar.eip.vo.XmlRequest xmlRequest) throws Exception { `o" =N:mi
Connection conn = null; 7L~71Ce(F<
String sql = ""; W_b(]JH l
java.sql.Statement stmt = null; m^i5$_HOd
ResultSet rs = null; \wm.OU?&a\
ResultSetMetaData rsmd= null; fy+np6j
int rowCount; 6o ?xC
int maxRow; P5jN"% Z
int recNo; f+vLcXx]I
try{ "{WB&h:hX
System.setProperty("jdbc.drivers",drivers); "Q7Ft.UP
conn=DriverManager.getConnection(url,username,password); bI {a[e0K
maxRow=xmlRequest.MaxRows; ~rX=@f t
recNo=xmlRequest.RecNo; 6#&% 1 [@
sql="select * from PRODUCT"; "Nez'
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); .J+!m1Cn
rs = stmt.executeQuery(sql); aEAz/zZ
rsmd=rs.getMetaData(); TI#8!?ZF
rs.last(); WLfP(igT
rowCount=rs.getRow(); Z>|:s_P<\t
xmlRequest.SetRecordCount(rowCount); ~5@M,
for(int i=1;i<=rsmd.getColumnCount();i++) { 3mmBx O6O<
if(rsmd.getColumnTypeName(i).equals("STRING")) { WH0 XRwlt
xmlRequest.AddField(rsmd.getColumnName(i),rsmd.getColumnTypeName(i),rsmd.getPrecision(i)); nx|X{a%!
} nk)}Jz%>9
else { Q'a ';/b
xmlRequest.AddField(rsmd.getColumnName(i),rsmd.getColumnTypeName(i)); =s#@NgkF
} ]J/BS{j7
} LHF4Om}
for(int i=1;i<=maxRow;i++) { zw%
if(recNo+i>rowCount) { GLUg\U*m
break; ]$7" 2D
} Z~G2EEyQ o
else { ZK.rt)
rs.absolute(recNo+i); wQ}edq "K5
xmlRequest.Append(); EAST?
for(int j=1;j<=rsmd.getColumnCount();j++) { w;"V&@}mH
xmlRequest.SetValue(rsmd.getColumnName(j), rs.getString(j)); DB}4"4)^
} jQ<3<k8
} 'yOJ1`s(,H
} +7 t-^{t
} catch(Exception e) { e][ bD
xmlRequest.Error=e.getMessage(); ]:`'T,Uc
} finally { X-##cVw,L
if(rs != null) f\&ZSwT
rs.close(); 9n&Sjd4
if(stmt != null) f"N1w,ARF[
stmt.close(); 'W{J"?w`
if(conn != null) u`:B#4
conn.close(); FAC ^E1=
} ]/A: T{
return xmlRequest; "Vy/m3P\
} ojO yl]@
O=9VJdv
X@}} 3tA
\Od4iMu
public joyistar.eip.vo.XmlPost update_XML(joyistar.eip.vo.XmlPost xmlPost) throws Exception { N1 5LYb
Connection conn = null; UC"2ZL[R
java.sql.Statement stmt = null; d |4*$5o
ResultSet rs = null; GkDTQ
ResultSetMetaData rsmd =null; }z`OaD
String acttype = null; //action type k%5;~`mZ
XmlAction action = null; //an action o6D|[ 2:
String sql = null; 2N6nQ
String where = null; `BYch-
try { '{F rUlB
System.setProperty("jdbc.drivers",drivers); !.a $sc m
conn=DriverManager.getConnection(url,username,password); }h63G <4
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); O0ce"Sy1
conn.setAutoCommit(false); {3e tV(b|5
for(int i = 0;i<xmlPost.Actions.size();i++) { Q-(a|Dj
action = xmlPost.GetAction(i); \?wa^-#3
acttype = action.ActionType; 1!pjwr
if(acttype.equals("old")) { //where acton, then update or delete action after it; akY2%YH
where = " where "; %q\-UH@Fn
where = where+"PRODUCT_ID='"+action.getField("PRODUCT_ID").Value+"'"; kR},8
} >U qs\c o
if(acttype.equals("update")){ 7V2`#LE|
String set = " set "; 3ar!{a#n
for(int j=0;j<action.getFieldCount();j++) { 9-Cr85Gm
if(action.getField(j).Name.equals("PRODUCT_PRICE")) { ^S)1IW\u
set = set+action.getField(j).Name+"="+action.getField(j).Value; V37f'el)
} 5"S2 [ s
else { |qbqf.
set = set+action.getField(j).Name+"='"+action.getField(j).Value+"'"; .]B^[#
} 9:U:&^V
if(j<action.getFieldCount()-1) { &9n3$nW
set = set+ "," ; omWwKNPg
} &q]Yk ]BJ
} HpGS}3f2
sql="update product"+set+where; {`h&q uQ
stmt.executeUpdate(sql); ?FF -N>
} a44q*{T
if(acttype.equals("delete")){ Q=5Xbe
where = " where "; @w +;Q oQ
where = where+action.getField("PRODUCT_ID").Name+"='"+action.getField("PRODUCT_ID").Value+"'"; B 0G`V#q%n
sql = "delete from product"+where; p08g.HzP
stmt.executeUpdate(sql); 5NM1*d^/h
} mNos/i%_h
if(acttype.equals("insert")){ PwToe5iP
String field = new String(); eTv_4F++
String value = new String(); CQqM[`)w!
for(int j=0;j<action.getFieldCount();j++) { YyE4Qjx
field = field+action.getField(j).Name; @$V9^c+BL]
if(action.getField(j).Name.equals("PRODUCT_PRICE")) { q7f0B3gdn
value = value+action.getField(j).Value; x0{M
} (8G<s7X%
else { ;\PLR4ZLS
value=value+"'"+action.getField(j).Value+"'"; |A1 &?
} X2Ge"d~o^
if(j<action.getFieldCount()-1) { yDvzMIN1
field = field+ "," ; d0?Tq
value = value+","; a~o&E ?
} =]-@D;nh
} QU~VY
sql="insert into product ("+field+") values ("+value+")"; } GSFXXvr
stmt.executeUpdate(sql); .N5S5]\
} 9t-/(
} si;V&2o(g
conn.commit(); 8v^8;U\#
} catch(Exception e) { k[~9?u*t
xmlPost.Error=e.getMessage(); ?ccPeu
} finally { MEhm}=k6
if(rs != null) u 2^R1Ap-
rs.close(); R p4ZiR^p+
if(stmt != null) !h S[8 )v
stmt.close(); asevn#g
if(conn != null) \eS\ p
conn.close(); nzadFEnoD
} [QaITUIHv
return xmlPost; )hEfK2>ID
} sH{cukp)
#,7a.+(t
} #LmP1yh
*,?:7N
同样query_XML是取数据，update_XML是保存数据，是覆盖BusinessObjectBean的接口，只不过这个例子使用了标准JDBC连接数据库，虽然代码复杂好多，不过仔细一看，不难理解，我马上做了个测试，修改了以下代码，同时把jdbc-odbc连接改成了我的jdbc连接方式的代码： FV%/f1n
aD||x:
String drivers="org.gjt.mm.mysql.Driver"; ^\6u&o$>]
String username="root"; tVT<J(
String password="root"; _ ^>i"fQal
String url=" jdbc:mysql://localhost:3306/mysql1"; 4:o6Er'L
String sql=”select * from stores”; qr z,D
4z&2>RBN
搞完这些，用Build编译，然后运行页面，哈哈，居然成功了。Update好像有点复杂，偶还在研究中，似乎是有几个标记操作类型的old,insert,update,delete,然后根据这些拼装SQL，等我试好了发上来。
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