Birt 生成PDF中文乱码问题
《2012》启示了什么？
Sep
12
Birt报表制作时会记录了jdbc连接信息（如果用jdbc连接），运行时直接用这连接信息取数据生成报表！但很多时候我们运行报表的环境和制作报表环境不一样，连接信息不一样或不确定，这样需要由程序来控制jdbc的Connection，可惜Birt的Report Engine没有提供方便的接口来实现我们的需求！
Jason在“Birt world” blog中标题为“Using a supplied connection with BIRT”提供了很好的解决方案，可以通过修改oda jdbc plugins和IRunTask的setAppContext来实现程序控制数据连接方式。
我根据实习需要把代码进行了相应修改，两个类分别继承于org.eclipse.birt.report.data.oda.jdbc.OdaJdbcDriver和Connection：
public class JdbcExistDriver extends OdaJdbcDriver{
private final static String APPLICATION_BIRT_CONNECTION = "webreport.birt.connection";
private Connection conn = null;
public JdbcExistDriver() {
}
public IConnection getConnection(String string) throws OdaException {
if(this.conn != null){
ExistConnection jdbcConn = new ExistConnection();
jdbcConn.conn = conn;
return jdbcConn;
}else{
return new org.eclipse.birt.report.data.oda.jdbc.Connection();
}
}
public void setAppContext(Object context) throws OdaException {
Map ctx = (Map)context;
this.conn = (Connection)ctx.get(APPLICATION_BIRT_CONNECTION);
}
public void setLogConfiguration( LogConfiguration logConfig )
throws OdaException{
super.setLogConfiguration(logConfig);
}
}
public class ExistConnection extends Connection {
protected java.sql.Connection conn = null;
public ExistConnection() {
super();
}
public void close() throws OdaException {
if(this.jdbcConn != null){
this.jdbcConn = null;
}
}
public void open(Properties properties) throws OdaException {
this.jdbcConn = conn;
}
}
copy 两个类到WEB-INF\platform\plugins\org.eclipse.birt.data.oda.jdbc_XXXXX\oda-jdbc.jar里;
修改plugin.xml文件，把
改为
程序调用修改为：
Jason在“Birt world” blog中标题为“Using a supplied connection with BIRT”提供了很好的解决方案，可以通过修改oda jdbc plugins和IRunTask的setAppContext来实现程序控制数据连接方式。
我根据实习需要把代码进行了相应修改，两个类分别继承于org.eclipse.birt.report.data.oda.jdbc.OdaJdbcDriver和Connection：
public class JdbcExistDriver extends OdaJdbcDriver{
private final static String APPLICATION_BIRT_CONNECTION = "webreport.birt.connection";
private Connection conn = null;
public JdbcExistDriver() {
}
public IConnection getConnection(String string) throws OdaException {
if(this.conn != null){
ExistConnection jdbcConn = new ExistConnection();
jdbcConn.conn = conn;
return jdbcConn;
}else{
return new org.eclipse.birt.report.data.oda.jdbc.Connection();
}
}
public void setAppContext(Object context) throws OdaException {
Map ctx = (Map)context;
this.conn = (Connection)ctx.get(APPLICATION_BIRT_CONNECTION);
}
public void setLogConfiguration( LogConfiguration logConfig )
throws OdaException{
super.setLogConfiguration(logConfig);
}
}
public class ExistConnection extends Connection {
protected java.sql.Connection conn = null;
public ExistConnection() {
super();
}
public void close() throws OdaException {
if(this.jdbcConn != null){
this.jdbcConn = null;
}
}
public void open(Properties properties) throws OdaException {
this.jdbcConn = conn;
}
}
copy 两个类到WEB-INF\platform\plugins\org.eclipse.birt.data.oda.jdbc_XXXXX\oda-jdbc.jar里;
修改plugin.xml文件，把
<dataSource
odaVersion="3.0"
driverClass="org.eclipse.birt.report.data.oda.jdbc.OdaJdbcDriver"
defaultDisplayName="%datasource.name"
setThreadContextClassLoader="false"
id="org.eclipse.birt.report.data.oda.jdbc">
odaVersion="3.0"
driverClass="org.eclipse.birt.report.data.oda.jdbc.OdaJdbcDriver"
defaultDisplayName="%datasource.name"
setThreadContextClassLoader="false"
id="org.eclipse.birt.report.data.oda.jdbc">
改为
<dataSource
odaVersion="1.0"
driverClass="xx.JdbcExistDriver"
defaultDisplayName="exit driver"
setThreadContextClassLoader="false"
id="org.eclipse.birt.report.data.oda.jdbc">
odaVersion="1.0"
driverClass="xx.JdbcExistDriver"
defaultDisplayName="exit driver"
setThreadContextClassLoader="false"
id="org.eclipse.birt.report.data.oda.jdbc">
程序调用修改为：
context.put("webreport.birt.connection",conn);
