用java代码编写Oracle存储过程

以下示例用java实现ping，然后用PLSQL存储过程调用该方法，可用来测试dblink服务器网络状态

1.java调用系统功能实现ping，返回ping后获取的字符（以下代码在Linux上通过，windows的话需要修改参数）

create or replace and compile java source named "CheckNet" as
import java.net.*;
import java.io.*;
import java.util.*;
public class CheckNet
{
public static String ping(String host) {
String pingResult = "";
String pingCmd = "ping -c 2 " + host;
BufferedReader in;
try {
Runtime r = Runtime.getRuntime();
Process p = r.exec(pingCmd);

in = new BufferedReader(new
InputStreamReader(p.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
pingResult += inputLine;
}
in.close();
return pingResult;

}
catch (IOException e) {
return e.getMessage();
}

}

}

2.用PLSQL封装java方法

CREATE OR REPLACE FUNCTION CheckNet_ping(p_host in varchar2) RETURN varchar2 AS
LANGUAGE JAVA NAME 'CheckNet.ping(java.lang.String) return java.lang.String';

3.测试

select CheckNet_ping('127.0.0.1') from dual