[LUA]几个简单的luajava使用例子

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 》)

<!--StartFragment-->/////////////////////////////////////////////////////

// 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

<!--StartFragment-->////////////////////////////////////////////////////

// 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);
	}
	
}