BeanUtils包的使用，主要是BeanUtils和PropertyUtils的区别

用BeanUtils工具包时，先要把两个Jar包进行Building Path，就是引入两个jar包，

commons-beanutils.jar

commons-logging-1.1.jar

package com.base_super;import java.util.Date;import java.util.Map;import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.beanutils.PropertyUtils;/** * Apache 提供的BeanUtils工具包 *  * @author zjw * */public class BeanUtils_class {public static void main(String[] args)throws Exception {methiod();}public static void methiod() throws Exception {JavaBean_BeanUtils_class bean=new JavaBean_BeanUtils_class(33,44);//如果用BeanUtils调用的JavaBean 一定要用public修饰，要不然报错System.out.println(BeanUtils.getProperty(bean,"b"));//其他数据类型都自动转换为字符串类型，进行输入输出System.out.println(BeanUtils.getProperty(new JavaBean_BeanUtils_class(333,888),"a"));BeanUtils.setProperty(bean,"str","aaaaaaaaaaaaaaaaaaaaaa");//通过BeanUtils设置JavaBean的值System.out.println(bean.getStr());//BeanUtils支持属性链Date d=new Date();//d.setHours(hours);//d.setMinutes(minutes);//d.setMonth(month);//d.setSeconds(seconds);//d.setYear(year);//d.setTime(time);//d.setDate(date);//d.getDay();//这个getDay不行，所以一般用属性链时，最好用set方法的属性（自我总结）//Date中封装了这些个属性，都可以用做属性链,但每个属性都有自己的长度等限制，用时小心点BeanUtils.setProperty(bean,"birthday.time","333333");System.out.println(BeanUtils.getProperty(bean,"birthday.time"));/* * Map和JavaBean都是属性，值的组合方式，很相似，可以同过BeanUtils工具相互转换 *  *///这是JDK1.7的新特性，Map的新的定义方式//Map map={name:"wjw",age:23};//System.out.println(BeanUtils.setProperty(map,"name","wjw_java"));//BeanUtils也可以对Map进行操作/* * BeanUtils以字符串类型进行操作 * PropertyUtils以数据本身的类型进行操作 */PropertyUtils.setProperty(bean,"str","3331111");//str本身是字符串类型System.out.println(PropertyUtils.getProperty(bean,"str"));PropertyUtils.setProperty(bean,"a",99999999);//a本身是整形数据类型System.out.println(PropertyUtils.getProperty(bean,"a"));}}对应的JavaBeanpackage com.base_super;import java.util.Date;public class JavaBean_BeanUtils_class{private int a;private int b;private String str="dddddddd";private Date birthday =new Date();//实例化对象，用BeanUtils就可以使用Date中的属性了public JavaBean_BeanUtils_class(int a,int b){this.a=a;this.b=b;}public int getA() {return a;}public void setA(int a) {this.a = a;}public int getB() {return b;}public void setB(int b) {this.b = b;}public String getStr() {return str;}public void setStr(String str) {this.str = str;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;} }