package com.bjsxt.test;

public class Emp {

    private int empno;

    private String ename;

    public void sayHello(int a){

        System.out.println("sayHello,"+a);

    }

    public int getEmpno() {

        return empno;

    }

    public void setEmpno(int empno) {

        this.empno = empno;

    }

    public String getEname() {

        return ename;

    }

    public void setEname(String ename) {

        this.ename = ename;

    }

    public Emp(int empno, String ename) {

        super();

        this.empno = empno;

        this.ename = ename;

    }

    public Emp() {

    }

}

package com.bjsxt.test;

import javassist.CannotCompileException;

import javassist.ClassPool;

import javassist.CtClass;

import javassist.CtConstructor;

import javassist.CtField;

import javassist.CtMethod;

/**

 * 测试使用javassist生成一个新的类

 * @author 尚学堂高淇 www.sxt.cn

 *

 */

public class Demo01 {

    public static void main(String[] args) throws Exception {

        ClassPool pool = ClassPool.getDefault();

        CtClass cc = pool.makeClass("com.bjsxt.bean.Emp");

        //创建属性

        CtField f1 = CtField.make("private int empno;", cc);

        CtField f2 = CtField.make("private String ename;", cc);

        cc.addField(f1);

        cc.addField(f2);

        //创建方法

        CtMethod m1 = CtMethod.make("public int getEmpno(){return empno;}", cc);

        CtMethod m2 = CtMethod.make("public void setEmpno(int empno){this.empno=empno;}", cc);

        cc.addMethod(m1);

        cc.addMethod(m2);

        //添加构造器

        /*

         * CtClass.intType,pool.get("java.lang.String 构造函数的int和string类型

        */

        CtConstructor constructor = new CtConstructor(new CtClass[]{CtClass.intType,pool.get("java.lang.String")}, cc);

        constructor.setBody("{this.empno=empno; this.ename=ename;}");

        cc.addConstructor(constructor);

        cc.writeFile("c:/myjava"); //将上面构造好的类写入到c:/myjava中

        System.out.println("生成类，成功！");

    }

}