添加获取主机ip的代码。

 package com.sitech.ismp.coll.middleware.tomcat.impl;
 
-import java.io.IOException;
-import java.lang.management.MemoryUsage;
-import java.net.MalformedURLException;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
+import org.apache.log4j.Logger;
 
 import javax.management.MBeanAttributeInfo;
 import javax.management.MBeanInfo;
@@ -22,9 +12,22 @@ import javax.management.openmbean.CompositeDataSupport;
 import javax.management.remote.JMXConnector;
 import javax.management.remote.JMXConnectorFactory;
 import javax.management.remote.JMXServiceURL;
+import java.io.IOException;
+import java.lang.management.MemoryUsage;
+import java.net.MalformedURLException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 
 public class CollTomcat {
 
+	private static Logger log= Logger.getLogger(CollTomcat.class);
+
 	HashMap<String, String[]> environmentMap = null;
 	private MBeanServerConnection mbeanServerConn = null;
 	JMXConnector JMXConn = null;
@@ -35,6 +38,11 @@ public class CollTomcat {
 
 	public void init(HashMap<String, String> params) {
 		String jmxurl = params.get("JMX_URL");
+		// frank 添加 IP参数，用于获取Tomcat所在主机的ping状态。
+		int start=jmxurl.indexOf("://");
+		int end=jmxurl.lastIndexOf(":");
+		String ip=jmxurl.substring(start+15,end);
+		params.put("ip",ip);
 		try {
 			JMXServiceURL serverURL = new JMXServiceURL(jmxurl);
 			try {
@@ -116,7 +124,9 @@ public class CollTomcat {
 
 	protected void release() {
 		try {
-			this.JMXConn.close();
+			if(null != JMXConn){
+				this.JMXConn.close();
+			}
 		} catch (IOException e) {
 			e.printStackTrace();
 		}