使用beanUtils操纵javabean

Sun公司的内省API过于繁琐，所以Apache组织结合很多实际开发中的应用场景开发了一套简单、易用的API操作Bean的属性——BeanUtils，在Beanutil中可以直接进行类型的自动转换。

BeanUtil工具包下载：

1，登录http://commons.apache.org/beanutils/

2,  点击Download

3, 点击commons-beanutils-1.9.2-bin.zip（commons-logging-1.1.3-src）进行下载就OK了

使用BeanUtil

在项目中导入commons-beanutils-1.9.2.jar包即可(PS:把此jar包复制到项目的lib文件夹，右击包，选build path==>add to build path 显示奶瓶即可)

另外：commons-beanutils-1.9.2.jar 要与 commons-logging-1.1.3.Jar共用。

 import java.lang.reflect.InvocationTargetException;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;

 import org.apache.commons.beanutils.BeanUtils;
 import org.apache.commons.beanutils.ConversionException;
 import org.apache.commons.beanutils.ConvertUtils;
 import org.apache.commons.beanutils.Converter;
 import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;
 import org.junit.Test;

 //使用beanUtils操纵bean属性（第三方）
 public class Demo {

     /**
      *
      * @throws Exception
      *
      */
     @Test
     public void test1() throws  Exception{

         Person p = new Person();

         BeanUtils.setProperty(p, "name", "zero");

         System.out.println(p.getName());

     }

     @Test
     public void test2() throws  Exception{

         String name = "aaaa";
         String password = "123";
         String age = "34";

         Person p = new Person();

         BeanUtils.setProperty(p, "name", name);//只支持8种基本数据类型
         BeanUtils.setProperty(p, "password", password);
         BeanUtils.setProperty(p, "age", age);

         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge());

     }

     @Test
     public void test3() throws  Exception{

         String name = "aaaa";
         String password = "123";
         String age = "34";
         String birthday = "1900-1-1";

         //为了让日期赋到bean的birthday属性上，给beanUtils注册一个日期转换
         ConvertUtils.register(new Converter(){

             @Override
             public Object convert(Class type, Object value) {

                 if(value==null){
                     return null;
                 }
                 if(!(value instanceof String)){
                     throw new ConversionException("only support String");
                 }

                 String str = (String) value;

                 if(str.trim().equals("")){
                     return null;
                 }

                 SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");

                 try {
                     return df.parse(str);
                 } catch (ParseException e) {
                     throw new RuntimeException(e);
                 }

             }

         },Date.class);

         Person p = new Person();

         BeanUtils.setProperty(p, "name", name);//只支持8种基本数据类型
         BeanUtils.setProperty(p, "password", password);
         BeanUtils.setProperty(p, "age", age);
         BeanUtils.setProperty(p, "birthday", birthday);

         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge()+"*"+p.getBirthday());

     }

     @Test
     public void test4() throws  Exception{

         String name = "aaaa";
         String password = "123";
         String age = "34";
         String birthday = "1998-1-1";

         ConvertUtils.register(new DateLocaleConverter(), Date.class);

         Person p = new Person();

         BeanUtils.setProperty(p, "name", name);//只支持8种基本数据类型
         BeanUtils.setProperty(p, "password", password);
         BeanUtils.setProperty(p, "age", age);
         BeanUtils.setProperty(p, "birthday", birthday);

         Date date = p.getBirthday();

         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge()+"*"+date.toLocaleString());

     }

     @Test
     public void test5() throws Exception{

         Map map = new HashMap();
         map.put("name", "zero");
         map.put("password", "521212");
         map.put("age", "33");
         map.put("birthday", "1998-1-1");

         ConvertUtils.register(new DateLocaleConverter(), Date.class);

         Person p = new Person();

         BeanUtils.populate(p, map);//用map集合的值，填充bean的属性值

         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge()+"*"+p.getBirthday());

     }

 }

 import java.util.Date;

 public class Person {// javabean

     private String name;
     private String password;
     private int age;
     private Date birthday;

     public Date getBirthday() {
         return birthday;
     }

     public void setBirthday(Date birthday) {
         this.birthday = birthday;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public String getPassword() {
         return password;
     }

     public void setPassword(String password) {
         this.password = password;
     }

     public int getAge() {
         return age;
     }

     public void setAge(int age) {
         this.age = age;
     }

     public String getAb(){
         return null;
     }

 }