作者： zyl910
一、緣由
當數據庫服務器很多時，或者要與第三方公司做數據庫表交換時，此時覺得若有一個簡單快捷的數據庫連接測試工具就好了。
因為若是采取直接把程序部署到tomcat等容器再測試的辦法，那就太費功夫了。
其次，連上數據庫后最好能顯示一下數據庫名稱、版本等基礎信息，這樣便能判定所連的數據庫是否正確。
二、用法
考慮到為了能一次性測試多個數據庫連接。於是我將它設計成一個命令行工具。
它的命令參數格式為： zjdbcping <driverClassName> <url> <username> <password>
<driverClassName>: 驅動類的全名. 例如oracle.jdbc.driver.OracleDriver<url>: JDBC連接串. 因為有可能會包含特殊資費，故建議用雙引號括起來，例如"jdbc:oracle:thin:@192.168.3.33:1521:zjkf"<username>: 數據庫賬號.<password>: 數據庫密碼.
具體運行時，還注意得用java命令來運行，並指定加載驅動 jar. 例如——
java -Xbootclasspath/a:"ojdbc6.jar" -jar zjdbcping.jar oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:@192.168.3.33:1521:zjkf" crjapp crjapp
運行結果如下——
zjdbcping <driverClassName> <url> <username> <password>
getCatalog: null
getClientInfo:
-- listing properties --
getMetaData:
getDatabaseMajorVersion: 11
getDatabaseMinorVersion: 2
getDatabaseProductName: Oracle
getDatabaseProductVersion: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
getDefaultTransactionIsolation: 2
getDriverMajorVersion: 11
getDriverMinorVersion: 2
getDriverName: Oracle JDBC driver
getDriverVersion: 11.2.0.1.0
getJDBCMajorVersion: 11
getJDBCMinorVersion: 2
getURL: jdbc:oracle:thin:@192.168.3.33:1521:zjkf
getUserName: CRJAPP
getClientInfoProperties:
#getColumnCount: 4
NAME MAX_LEN DEFAULT_VALUE DESCRIPTION
#RowCount: 0
一般情況下，寫個bat（或 sh）腳本來測試會比較方便，例如 “zjdbcping.bat” ——
java -Xbootclasspath/a:"ojdbc6.jar" -jar zjdbcping.jar oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:@192.168.3.33:1521:zjkf" crjapp crjapp
pause
三、源碼
ZJdbcPing.java ——
package org.zyl910.zjdbcping;
import java.io.PrintStream;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.util.Properties;
/** 測試Jdbc連接.
*
* @author zhouyuelin
*
*/
public class ZJdbcPing {
public static void main(String[] args) {
PrintStream outs = System.out;
// title.
outs.println("zjdbcping <driverClassName> <url> <username> <password>");
// oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:@192.168.3.33:1521:zjkf" crjapp crjapp
outs.println();
// args.
String driverClassName="";
String url="";
String username="";
String password="";
if (args.length>0) driverClassName=args[0];
if (args.length>1) url=args[1];
if (args.length>2) username=args[2];
if (args.length>3) password=args[3];
// connect.
Connection conn = null;
try {
Class.forName(driverClassName);
conn = DriverManager.getConnection(url, username, password);
}
catch(Throwable ex) {
ex.printStackTrace(outs);
}
if (null==conn) return;
// info.
try {
outs.println(String.format("getCatalog:\t%s", conn.getCatalog()));
outs.println("getClientInfo:");
Properties properties = conn.getClientInfo();
properties.list(outs);
//outs.println("getTypeMap:");
//Map<String,Class<?>> typeMap = conn.getTypeMap();
//for(String key: typeMap.keySet()) {
// Class<?> c = typeMap.get(key);
// outs.println(String.format("\t%s:\t%s", key, c.toString()));
//}
outs.println("getMetaData:");
DatabaseMetaData databaseMetaData = conn.getMetaData();
printDatabaseMetaData(outs, databaseMetaData, "\t");
}
catch(Throwable ex) {
ex.printStackTrace(outs);
}
finally {
try {
conn.close();
}
catch(Throwable ex) {
ex.printStackTrace(outs);
}
}
return;
}
private static void printDatabaseMetaData(PrintStream outs,
DatabaseMetaData dbmd, String prefix) throws Exception {
if (null==outs) return;
if (null==dbmd) return;
outs.println(prefix+String.format("getDatabaseMajorVersion:\t%d", dbmd.getDatabaseMajorVersion()));
outs.println(prefix+String.format("getDatabaseMinorVersion:\t%d", dbmd.getDatabaseMinorVersion()));
outs.println(prefix+String.format("getDatabaseProductName:\t%s", dbmd.getDatabaseProductName()));
outs.println(prefix+String.format("getDatabaseProductVersion:\t%s", dbmd.getDatabaseProductVersion()));
outs.println(prefix+String.format("getDefaultTransactionIsolation:\t%d", dbmd.getDefaultTransactionIsolation()));
outs.println(prefix+String.format("getDriverMajorVersion:\t%d", dbmd.getDriverMajorVersion()));
outs.println(prefix+String.format("getDriverMinorVersion:\t%d", dbmd.getDriverMinorVersion()));
outs.println(prefix+String.format("getDriverName:\t%s", dbmd.getDriverName()));
outs.println(prefix+String.format("getDriverVersion:\t%s", dbmd.getDriverVersion()));
outs.println(prefix+String.format("getJDBCMajorVersion:\t%d", dbmd.getJDBCMajorVersion()));
outs.println(prefix+String.format("getJDBCMinorVersion:\t%d", dbmd.getJDBCMinorVersion()));
outs.println(prefix+String.format("getURL:\t%s", dbmd.getURL()));
outs.println(prefix+String.format("getUserName:\t%s", dbmd.getUserName()));
ResultSet rs = dbmd.getClientInfoProperties();
outs.println(prefix+"getClientInfoProperties:");
printResultSet(outs, rs, prefix+"\t");
rs.close();
}
private static void printResultSet(PrintStream outs, ResultSet rs,
String prefix) throws Exception {
if (null==outs) return;
if (null==rs) return;
ResultSetMetaData rsmd = rs.getMetaData();
int cols = rsmd.getColumnCount();
outs.println(prefix+String.format("#getColumnCount:\t%d", cols));
// col.
if (true) {
outs.print(prefix);
for(int i=1; i<=cols; ++i) {
if (i>1) outs.print('\t');
String str = rsmd.getColumnName(i);
outs.print(str);
}
outs.println();
}
// rows.
int rows = 0;
while(rs.next()) {
++rows;
outs.print(prefix);
for(int i=1; i<=cols; ++i) {
if (i>1) outs.print('\t');
Object o = null;
String str = null;
try {
o = rs.getObject(i);
if (null!=o)
str = o.toString();
}
catch(Exception ex) {
str = String.format("(%s)", ex.getMessage());
}
outs.print(str);
}
outs.println();
}
outs.println(prefix+String.format("#RowCount:\t%d", rows));
}
}