 |
| Accept License Agreement |
wget --no-cookies \ --no-check-certificate \ --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" \ "http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz"For 32 Bit:-
wget --no-cookies \ --no-check-certificate \ --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" \ "http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-i586.tar.gz"圖6
yum install wget
tar xzf jdk-7u79-linux-x64.tar.gz
圖 7
chown 0.0 -R
vi ~/.bash_profile
source ~/.bash_profile
java -version
 |
| Log4j |
 |
| 下載 說明頁 |
 |
| 下載 |
 |
| log4j-1.2.17.jar |
 |
| Log4j 頁面，並選擇版本 |
 |
| 取得Maven dependency |
<!-- http://mvnrepository.com/artifact/log4j/log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency>
 |
| log4j的 dependency |
 |
| 輸出檔、console、layout 輸出格式 |
#定義 Root Logger 的等級為 INFO,且為其指定一個 appender 名為 rootAppender.
log4j.rootLogger=INFO, console
#指定 console 的類型.
log4j.appender.console=org.apache.log4j.ConsoleAppender
#指定 console 的 Layout.
log4j.appender.console.layout=org.apache.log4j.PatternLayout
#log4j.appender.console.Target=System.out
#指定 console Layout 的輸出格式.
log4j.appender.console.layout.ConversionPattern=%5p [%d{yyyy-MM-ddHH:mm:ss}]-[%c{1}:%L][%x] %m%n
 |
| build path 加入resources |
 |
| log4j.properties |
 |
| 宣告 使用log4j |
package com.test.log;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
/**
* Servlet implementation class Log4jTestServlet
*/
public class Log4jTestServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final Logger log= Logger.getLogger(Log4jTestServlet.class) ;
/**
* Default constructor.
*/
public Log4jTestServlet() {
// TODO Auto-generated constructor stub
log.info("Log4jTestServlet...");
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
log.info("doGet...");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
log.info("doPost...");
}
}
<servlet> <servlet-name>Log4jTestServlet</servlet-name> <display-name>Log4jTestServlet</display-name> <description></description> <servlet-class>com.test.log.Log4jTestServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Log4jTestServlet</servlet-name> <url-pattern>/Log4jTestServlet</url-pattern> </servlet-mapping>
 |
| console 輸入出log |
package com.rmi.test;
import java.net.MalformedURLException;
import java.rmi.AlreadyBoundException;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
/**
* 創建RMI註冊表，啟動RMI服務，並將遠程對象註冊到RMI註冊表中。
*
* @author levin 2015/12/3 下午11:16:36
*
*/
public class HelloServer {
public static void main(String args[]) {
try {
// 創建一個遠程對象
IHello hello = new HelloImpl();
// 本地主機上的遠程對象註冊表Registry的實例，並指定端口為8888，
// 這一步必不可少（Java默認端口是1099），必不可缺的一步，缺少註冊表創建，則無法綁定對像到遠程註冊表上
LocateRegistry.createRegistry(8888);
// 把遠程對象註冊到RMI註冊服務器上，並命名為hello
// 綁定的URL標準格式為：rmi://host:port/name(其中協議名可以省略，下面兩種寫法都是正確的）
Naming.bind("rmi://localhost:8888/hello", hello);
// Naming.bind("//localhost:8888/hello", hello);
System.out.println(">>>INFO:遠程IHello對象綁定成功！");
} catch (RemoteException e) {
System.out.println(">>>創建遠程對象發生異常！");
e.printStackTrace();
} catch (AlreadyBoundException e) {
System.out.println(">>>發生重複綁定對象異常！");
e.printStackTrace();
} catch (MalformedURLException e) {
System.out.println(">>>發生URL異常！");
e.printStackTrace();
}
}
}
package com.rmi.test;
import java.rmi.Remote;
import java.rmi.RemoteException;
/**
* 定義一個遠程接口，必須繼承Remote接口，其中需要遠程調用的方法必須拋出RemoteException異常
*
* @author levin 2015/12/3 下午11:17:19
*
*/
public interface IHello extends Remote {
/**
* 簡單的返回"Hello World!"字串
*
* @return 返回"Hello World!"字串
* @throws java.rmi.RemoteException
*/
public String helloWorld() throws RemoteException;
}
package com.rmi.test;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
/**
* 遠程的接口的實現
*
* @author levin 2015/12/3 下午11:19:23
*
*/
public class HelloImpl extends UnicastRemoteObject implements IHello {
private static final long serialVersionUID = 3509127927099606368L;
/**
* 因為UnicastRemoteObject的構造方法拋出了RemoteException異常，因此這裡默認的構造方法必須寫，
* 必須聲明拋出RemoteException異常
*
* @throws RemoteException
*/
public HelloImpl() throws RemoteException {
}
public String helloWorld() throws RemoteException {
return "Hello World!";
}
}
package com.rmi.test;
import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.RemoteException;
/**
* 客戶端測試，在客戶端調用遠程對像上的遠程方法，並返回結果。
*
* @author levin 2015/12/3 下午11:16:36
*
*/
public class HelloClient {
public static void main(String args[]) {
try {
// 在RMI服務註冊表中查找名稱為hello的對象，並調用其上的方法
IHello rhello = (IHello) Naming.lookup("rmi://localhost:8888/hello");
System.out.println(rhello.helloWorld());
} catch (NotBoundException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (RemoteException e) {
e.printStackTrace();
}
}
}
public class HelloWorld{//類別區塊開始
public static void main(String[ ] args){//方法區塊開始
//程式區塊
System.out.println("我第一支Java程式!!");
}//方法區塊結束
}//類別區塊結束
public class HelloWorld{
public static void main(String[ ] args){
System.out.println("我第一支Java程式!!");
}
}
public class TestDemo {
public TestDemo() {//Constructor
//這是基本Constructor
}
}
public class TestDemo {
}
public static void main(String[] args) {
TestDemo testDemo = new TestDemo();
}
package test;
public class TestConstructorDemo {
int age;
String name;
private TestConstructorDemo() {//Constructor
System.out.println("創建TestConstructorDemo");
}
public TestConstructorDemo(int age) {//Constructor
this.age = age;
System.out.println("創建TestConstructorDemo，初值建立 ,age : "+ age);
}
public TestConstructorDemo(String name) {//Constructor
this.name = name;
System.out.println("創建TestConstructorDemo，初值建立 ,name : "+ name);
}
public TestConstructorDemo(int age,String name) {//Constructor
this.age = age;
this.name = name;
System.out.println("創建TestConstructorDemo，初值建立, age : "+ age+", name : "+ name);
}
public void msg(){
System.out.println("age : " + age + ", name : " + name);
}
public static void main(String[] args) {
System.out.println("創建物件測試1 開始：");
TestConstructorDemo testDemo1 = new TestConstructorDemo();
testDemo1.msg();
System.out.println("創建物件測試1 結束----------------");
System.out.println("創建物件測試2 開始：");
TestConstructorDemo testDemo2 = new TestConstructorDemo(25);
testDemo2.msg();
System.out.println("創建物件測試2 結束----------------");
System.out.println("創建物件測試3 開始：");
TestConstructorDemo testDemo3 = new TestConstructorDemo("levin");
testDemo3.msg();
System.out.println("創建物件測試3 結束----------------");
System.out.println("創建物件測試4 開始：");
TestConstructorDemo testDemo4 = new TestConstructorDemo(25,"levin");
testDemo4.msg();
System.out.println("創建物件測試4 結束----------------");
}
}
撰寫一個JAVA程式 public class HelloWorld{ public static void main(String[ ] args){ System.out.println("我第一支Java程式!!"); } } ...
