[LUA]几个简单的luajava使用例子

转自：http://univasity.iteye.com/blog/493339

代码来个人和自网络，仅供参考，如有纰漏请指正，欢迎交流。

 

01. 在AWT中的使用(来自文章《Java中使用Lua脚本语言 》)

/////////////////////////////////////////////////////

// Hello.java

 public class Hello
 {
     public static void main(String[] args)
     {
       LuaState L = LuaStateFactory.newLuaState();
       L.openLibs();
       System.out.println("这里是Java程序调用Lua脚本");

       // 加载脚本hello.lua,并执行
       L.LdoFile("res/hello.lua");
     }
 }

 

--------------------------------------------------------

-- hello.lua

 frame = luajava.newInstance("java.awt.Frame", "Lua Java Console")
 console = luajava.newInstance("java.awt.TextArea")
 buttons_pn = luajava.newInstance("java.awt.Panel")
 execute_bt = luajava.newInstance("java.awt.Button", "Execute")
 clear_bt = luajava.newInstance("java.awt.Button", "Clear")
 exit_bt = luajava.newInstance("java.awt.Button", "Exit")
 frame:setSize(600,300)

 buttons_pn:add(execute_bt)
 buttons_pn:add(clear_bt)
 buttons_pn:add(exit_bt)

 BorderLayout = luajava.bindClass("java.awt.BorderLayout")

 frame:add(BorderLayout.NORTH, console)
 frame:add(BorderLayout.SOUTH, buttons_pn)
 frame:pack()
 frame:show()

 --
 -- Listeners
 --

 execute_cb = {
 actionPerformed = function(ev)
     print("execute")
     pcall(loadstring(console:getText()))
 end
 }

 jproxy = luajava.createProxy("java.awt.event.ActionListener",execute_cb)

 execute_bt:addActionListener(jproxy)


 clear_cb = {actionPerformed= function (ev)
     print("clear");
     console:setText("");
 end
 }

 jproxy = luajava.createProxy("java.awt.event.ActionListener" ,clear_cb)
 clear_bt:addActionListener(jproxy)

 exit_cb = { actionPerformed=function (ev)
 print("exit")
     frame:setVisible(false)
     frame:dispose()
 end
 }


 jproxyb = luajava.createProxy("java.awt.event.ActionListener" ,exit_cb)

 exit_bt:addActionListener(jproxyb)

 close_cb = {    }
 function close_cb.windowClosing(ev)
     print("close")
     frame:setVisible(false)
     frame:dispose()
 end

 function close_cb.windowActivated(ev)
     print("act")
 end

 jproxy = luajava.createProxy("java.awt.event.WindowListener", close_cb)
 frame:addWindowListener(jproxy)

 

 

 02. 在SWT中的使用(本人写的一个小例子)

/////////////////////////////////////////////////////

// Hello.java

 

 

 public class Hello {

  /**
   * @param args
   */
  public static void main(String[] args) {
 //  Display display = new Display();
 //  Shell shell = new Shell(display);
 //  shell.setLayout(null);
 //  Text hello = new Text(shell, SWT.MULTI);
 //  shell.setText("Java应用程序");
 //  shell.setSize(200, 100);
 //  hello.setText("Hello,SWT World!");
 //  hello.pack();
 //  shell.open();
 //  while(!shell.isDisposed()){
 //   if(!display.readAndDispatch()){
 //    display.sleep();
 //   }
 //  }
 //  display.dispose();

   LuaState L = LuaStateFactory.newLuaState();
   L.LdoFile("res/hello.lua");
   L.close();
  }

 }

 --------------------------------------------------------------

-- hello.lua

 --
 -- create instance
 --
 display = luajava.newInstance("org.eclipse.swt.widgets.Display") -- Display

 shell = luajava.newInstance("org.eclipse.swt.widgets.Shell",display) -- Shell

 SWT = luajava.bindClass("org.eclipse.swt.SWT") -- SWT

 text = luajava.newInstance("org.eclipse.swt.widgets.Text", shell,SWT.MULTI) -- Text

 --
 -- init state
 --
 shell:setText("Java应用程序")
 shell:setSize(200, 100)
 text:setText("Hello SWT World!")
 text:pack()
 shell:open()

 --
 -- loop
 --
 while not shell:isDisposed() do
  if not display:readAndDispatch() then
   display:sleep()
  end
 end
 display:dispose()

 

 

03. 网上找到的一个例子

////////////////////////////////////////////////////

// IBusinessLogic.java

 public interface IBusinessLogic {
  public void doLogic ();
 }

  

----------------------------------------------------

-- LuaLogic.lua

 local logic = {}
 function logic.doLogic ()
  print("hello from logic written in Lua")
 end
 return logic

  

/////////////////////////////////////////////////////

// LuaJavaTest.java

 public class LuaJavaTest {

 public static void main(String[] args) throws ClassNotFoundException, LuaException {
       LuaState l = LuaStateFactory.newLuaState();
       l.openLibs();

       l.LdoFile("res/LuaLogic.lua");

       LuaObject logic = l.getLuaObject("logic");
       IBusinessLogic jlogic = (IBusinessLogic) (logic.createProxy("IBusinessLogic"));
       jlogic.doLogic();

       l.pop(1);
 }

  

04.数值和对象传递的一个例子(参考自http://hi.baidu.com/lff0305/blog/item/fd666931da276111eac4af45.html )

-----------------------------------------

-- test01.lua

 function sum(a, b)
  return a+b
 end
 function test1(v)
  v:init()
 end

 

/////////////////////////////////////////////////////

// Test01.java

 public class Test01 {

     /**
      * @param args
      */
     public static void main(String[] args) {

         LuaState L = LuaStateFactory.newLuaState();
         // 加载lua标准库,否则一些lua基本函数无法使用
         L.openLibs();
         // doFile
         L.LdoFile("res/test01.lua");

         //---------------------------------------------值传递测试
         // 找到函数 sum
         L.getField(LuaState.LUA_GLOBALSINDEX, "sum");

         // 参数1压栈
         L.pushNumber(100);

         // 参数2压栈
         L.pushNumber(50);

         // 调用，共2个参数1个返回值
         L.call(2, 1);

         // 保存返回值到result中
         L.setField(LuaState.LUA_GLOBALSINDEX, "result");

         // 读入result
         LuaObject lobj = L.getLuaObject("result");
         // 打印结果
         System.out.println(lobj.getNumber());

         //---------------------------------------------对象传递测试
         Value v = new Value();

         L.getField(LuaState.LUA_GLOBALSINDEX, "test1");

         try {
             L.pushObjectValue(v);
         } catch (LuaException e) {
             e.printStackTrace();
         }

         L.call(1, 0);

         v.print();
     }

 }

 class Value {
     private int i;

     public void init(){
         i = 111;
     }

     public void print(){
         System.out.println(i);
     }

 }

 

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