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2010-06-01T05:06:26Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Logging JDBC Driver Operations ==



<source lang="java">
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
public class Main {
public static void main(String[] args) throws Exception {
Connection conn = getHSQLConnection();
conn.setAutoCommit(false);
Statement st = conn.createStatement();
try {
st.executeUpdate("create table survey (id int,name varchar(30));");
st.executeUpdate("insert into survey (id,name ) values (1,"nameValue")");
st.executeUpdate("insert into survey (id,name ) values (2,"nameValue")");
// commits all the transactions
conn.rumit();
} catch (Exception e) {
// cancel (roll back) all the transactions
conn.rollback();
// to see what went wrong
e.printStackTrace();
}
st = conn.createStatement();
ResultSet rs = st.executeQuery("SELECT * FROM survey");
outputResultSet(rs);
rs.close();
st.close();
conn.close();
}
private static void outputResultSet(ResultSet rs) throws Exception {
ResultSetMetaData rsMetaData = rs.getMetaData();
int numberOfColumns = rsMetaData.getColumnCount();
for (int i = 1; i < numberOfColumns + 1; i++) {
String columnName = rsMetaData.getColumnName(i);
System.out.print(columnName + " ");
}
System.out.println();
System.out.println("----------------------");
while (rs.next()) {
for (int i = 1; i < numberOfColumns + 1; i++) {
System.out.print(rs.getString(i) + " ");
}
System.out.println();
}
}
private static Connection getHSQLConnection() throws Exception {
Class.forName("org.hsqldb.jdbcDriver");
String url = "jdbc:hsqldb:mem:data/tutorial";

DriverManager.setLogWriter(new PrintWriter("yourFileName.log"));

return DriverManager.getConnection(url, "sa", "");
}
}</source>



<pre class=codeResult>//Content in yourFileName.log
DriverManager.getConnection("jdbc:hsqldb:mem:data/tutorial")
trying driver[className=org.hsqldb.jdbcDriver,org.hsqldb.jdbcDriver@19efb05]
getConnection returning driver[className=org.hsqldb.jdbcDriver,org.hsqldb.jdbcDriver@19efb05]</pre>

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Java Tutorial/Database/JDBC Logging - История изменений

Admin: 1 версия

в 17:44, 31 мая 2010