JDBC数据库连接测试工具

• 贴代码

import java.io.PrintStream;
import java.sql.*;
import java.util.Properties;
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));
}
}

•  java打jar包

方法步骤

（1）用命令行进入到该目录下，编译这个文件

　　 javac ZJdbcPing.java 

（2）将编译后的ZJdbcPing.class文件打成jar包

　　 jar -cvf ZJdbcPing.jar ZJdbcPing.class 

　　c表示要创建一个新的jar包，v表示创建的过程中在控制台输出创建过程的一些信息，f表示给生成的jar包命名

（3） java -jar ZJdbcPing.jar  这时会报如下错误  ZJdbcPing.jar中没有主清单属性 

　　添加Main-Class属性

　　用压缩软件打开ZJdbcPing.jar，会发现里面多了一个META-INF文件夹，里面有一个MENIFEST.MF的文件，用记事本打开

1 Manifest-Version: 1.0
2 Created-By: 1.8.0_121 (Oracle Corporation)
3 

　　在第三行的位置写入 Main-Class: ZJdbcPing（注意冒号后面有一个空格，整个文件最后有一行空行），保存

 

 具体运行时，还注意得用java命令来运行，并指定加载驱动 jar. 例如——

java -Xbootclasspath/a:"ojdbc6-11.2.0.3.jar" -jar ZJdbcPing.jar oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:@10.10.10.245:1521:orcl" yjkj 123456
pause

　　运行结果