hibernate中控制console输出SQL语句的配置如下：
hibernate.cfg.xml中
<hibernate-configuration>
<session-factory>
...
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
...
然而在iBatis中
须在log4j.properties加上如下代码(仅供参考)：
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug,stdout
下面是完整实例
via: http://www.tutorialspoint.com/ibatis/ibatis_debugging.htm
It is easy to debug your program while working with iBATIS. iBATIS has built-in logging support and it works with the following logging libraries and searches for them in this order.
-
Jakarta Commons Logging (JCL).
-
Log4J
-
JDK logging
You can use any of the above listed libraries alongwith iBATIS.
Debugging with Log4J:
Assuming you are going to use Log4J, which is my favorite for logging. Before proceeding you need to cross check following points:
-
The Log4J JAR file (log4j-{version}.jar) should be in the CLASSPATH.
-
You have log4j.properties available in the CLASSPATH.
Following is the of a log4j.properties file. Note that some of the lines are commented out. You can uncomment them if you need additiona debugging information.
# Global logging configuration
log4j.rootLogger=ERROR, stdout
log4j.logger.com.ibatis=DEBUG
# shows SQL of prepared statements
#log4j.logger.java.sql.Connection=DEBUG
# shows parameters inserted into prepared statements
#log4j.logger.java.sql.PreparedStatement=DEBUG
# shows query results
#log4j.logger.java.sql.ResultSet=DEBUG
#log4j.logger.java.sql.Statement=DEBUG
# Console output
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p[%t]-%m%n
You can find complete documentation for Log4J from Apaches site: Log4J Documentation.
iBATIS Debugging Example:
The following Java class is a very simple example that initializes, and then uses, the Log4J logging library for Java applications. We would use above mentioned property file which lies in CLASSPATH.
import org.apache.log4j.Logger;
import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;
import java.io.*;
import java.sql.SQLException;
import java.util.*;
public class IbatisUpdate{
static Logger log = Logger.getLogger(IbatisUpdate.class.getName());
public static void main(String[] args) throws IOException,SQLException{
Reader rd = Resources.getResourceAsReader("SqlMapConfig.xml");
SqlMapClient smc = SqlMapClientBuilder.buildSqlMapClient(rd);
/* This would insert one record in Employee table. */
log.info("Going to update record.....");
Employee rec = new Employee();
rec.setId(1);
rec.setFirstName( "Roma");
smc.update("Employee.update", rec );
log.info("Record updated Successfully ");
log.debug("Going to read records.....");
List <Employee> ems = (List<Employee>)smc.queryForList("Employee.getAll", null);
Employee em = null;
for (Employee e : ems) {
System.out.print(" " + e.getId());
System.out.print(" " + e.getFirstName());
System.out.print(" " + e.getLastName());
System.out.print(" " + e.getSalary());
em = e;
System.out.println("");
}
log.debug("Records Read Successfully ");
}
}
Compilation and Run:
Here are the steps to compile and run the above mentioned software. Make sure you have set PATH and CLASSPATH appropriately before proceeding for the compilation and execution.
-
Create Employee.xml as shown above.
-
Create Employee.java as shown above and compile it.
-
Create IbatisUpdate.java as shown above and compile it.
-
Create log4j.properties as shown above.
-
Execute IbatisUpdate binary to run the program.
You would get following result, and a record would be updated in EMPLOYEE table and later same record would be read from the EMPLOYEE table.
DEBUG [main] - Created connection 28405330.
DEBUG [main] - Returned connection 28405330 to pool.
DEBUG [main] - Checked out connection 28405330 from pool.
DEBUG [main] - Returned connection 28405330 to pool.
1 Roma Ali 5000
2 Zara Ali 5000
3 Zara Ali 5000
Debug Methods:
In the above example we used only info() method but you can use any of the following methods as per your requirements:
public void trace(Object message);
public void debug(Object message);
public void info(Object message);
public void warn(Object message);
public void error(Object message);
public void fatal(Object message);