Beanutils的使用

这是两个javabean对象


package com.beanutils;




import java.util.*;






public class Person ...{


private String name;


private String sex;


private int age;


private Address address;


private List goods;


private Map contact;






public Person() ...{


}






public Person(String name) ...{


this.name = name;


}






public Person(String name,String sex) ...{


this.name = name;


this.sex = sex;


}






public String getName() ...{


return this.name;


}






public void setName(String name) ...{


this.name = name;


}






public String getSex() ...{


return this.sex;


}






public void setSex(String sex) ...{


this.sex = sex;


}






public int getAge() ...{


return this.age;


}






public void setAge(int age) ...{


this.age = age;


}






public Address getAddress() ...{


return this.address;


}






public void setAddress(Address address) ...{


this.address = address;


}






public List getGoods() ...{


return this.goods;


}






public void setGoods(List goods) ...{


this.goods = goods;


}






public Map getContact() ...{


return this.contact;


}






public void setContact(Map contact) ...{


this.contact = contact;


}






public void sayHello() ...{


System.out.println("Hello World!");


}






public void f(String str) ...{


System.out.println("Person.f()..." + str);


}






public String toString() ...{


return "Person.toString()...";


}


}

=========================================================================================


package com.beanutils;






public class Address ...{


private String province;


private String city;


private String street;


private String zipcode;






public String getProvince() ...{


return this.province;


}






public void setProvince(String province) ...{


this.province = province;


}






public String getCity() ...{


return this.city;


}






public void setCity(String city) ...{


this.city = city;


}






public String getStreet() ...{


return this.street;


}






public void setStreet(String street) ...{


this.street = street;


}






public String getZipcode() ...{


return this.zipcode;


}






public void setZipcode(String zipcode) ...{


this.zipcode = zipcode;


}


}

============================================================================

一个测试类


package com.beanutils;




import java.util.*;


import org.apache.commons.beanutils.*;






public class BeanUtilsTest ...{




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


Address address = new Address();


address.setProvince("hunan");


address.setCity("changsha");


address.setStreet("wuyilu");


address.setZipcode("410000");




List goods = new ArrayList();


goods.add("sporting");


goods.add("singing");


goods.add("dancing");




Map contact = new HashMap();


contact.put("student","Tom");


contact.put("teacher","Lucy");




Person person = new Person();


person.setName("Mike");


person.setSex("male");


person.setAge(25);


person.setAddress(address);


person.setGoods(goods);


person.setContact(contact);




//BeanUtilsTest.cloneBean(person);


//BeanUtilsTest.copyProperties(person);


//BeanUtilsTest.propertyUtilsCopyProperties(person);


//BeanUtilsTest.copyProperty(person);


//BeanUtilsTest.describe(person);


//BeanUtilsTest.propertyUtilsDescribe(person);


//BeanUtilsTest.getArrayProperty(person);


//BeanUtilsTest.getIndexedProperty(person);


//BeanUtilsTest.getMappedProperty(person);


//BeanUtilsTest.getNestedProperty(person);


//BeanUtilsTest.populate(person);




//得到一个bean中指定属性的值，相当于getter


// System.out.println(BeanUtils.getProperty(person,"name"));


// //修改一个bean中指定属性的值，相当于setter


// BeanUtils.setProperty(person,"name","Tom");


// System.out.println(BeanUtils.getProperty(person,"name"));


// System.out.println("--------------------------------------");


//


BeanUtilsTest.invokeMethod();


// System.out.println("--------------------------------------");


// BeanUtilsTest.getAccessibleMethod();


// System.out.println("--------------------------------------");


// BeanUtilsTest.invokeConstructor();


// System.out.println("--------------------------------------");


BeanUtilsTest.getAccessibleConstructor();




}




//BeanUtils.cloneBean()--克隆目标bean




public static void cloneBean(Person person) throws Exception ...{


Person p = (Person)BeanUtils.cloneBean(person);


System.out.println(p.getAddress().getCity());


System.out.println(person.getAddress().getCity());


p.getAddress().setCity("hengyang");


System.out.println("---------------------------");


System.out.println(p.getAddress().getCity());


System.out.println(person.getAddress().getCity());


System.out.println(p.getAddress() == person.getAddress());


}




//BeanUtils.copyProperties()--拷贝目标bean中属性的值，能进行类型转换




public static void copyProperties(Person person) throws Exception ...{


Person p = new Person();


BeanUtils.copyProperties(p,person);


System.out.println(p.getAddress().getCity());


System.out.println(person.getAddress().getCity());


p.getAddress().setCity("hengyang");


System.out.println("---------------------------");


System.out.println(p.getAddress().getCity());


System.out.println(person.getAddress().getCity());


System.out.println(p.getAddress() == person.getAddress());


}




//PropertyUtils.copyProperties()--拷贝目标bean中属性的值，不能进行类型转换




public static void propertyUtilsCopyProperties(Person person) throws Exception ...{


Person p = new Person();


PropertyUtils.copyProperties(p,person);


System.out.println(p.getAddress().getCity());


System.out.println(person.getAddress().getCity());


p.getAddress().setCity("hengyang");


System.out.println("---------------------------");


System.out.println(p.getAddress().getCity());


System.out.println(person.getAddress().getCity());


System.out.println(p.getAddress() == person.getAddress());


}




//BeanUtils.copyProperty()--拷贝一个值给目标Bean的一个属性，能进行类型转换




public static void copyProperty(Person person) throws Exception ...{


Person p = new Person();


BeanUtils.copyProperty(p,"age","12");


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


}




//BeanUtils.describe()--得到一个bean的所有描述，返回的是一个map




public static void describe(Person person) throws Exception ...{


Map map = BeanUtils.describe(person);


Set set = map.keySet();




for(Iterator it = set.iterator(); it.hasNext(); ) ...{


Object o = it.next();


System.out.println(o + ": " + map.get(o));


}


System.out.println("--------------------------------------");


// Collection c = map.values();


// for(Object o : c) {


// System.out.println(o);


// }


}






//PropertyUtils.describe()--得到一个bean的所有描述，返回的是一个map




public static void propertyUtilsDescribe(Person person) throws Exception ...{


Map map = PropertyUtils.describe(person);


Set set = map.keySet();




for(Iterator it = set.iterator(); it.hasNext(); ) ...{


Object o = it.next();


System.out.println(o + ": " + map.get(o));


}


System.out.println("--------------------------------------");


// Collection c = map.values();


// for(Object o : c) {


// System.out.println(o);


// }


// System.out.println("----------------------------");


}




//BeanUtils.populate()--使用一个map为bean赋值




public static void populate(Person person) throws Exception ...{


Map map = PropertyUtils.describe(person);


Person p = new Person();


BeanUtils.populate(p,map);


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


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


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


System.out.println(p.getAddress().getProvince());


System.out.println(p.getGoods().get(1));


System.out.println(p.getContact().get("student"));


System.out.println("--------------------------------------");


}




//BeanUtils.getArrayProperty()--将目标bean的一个属性的值转换成一个字符串数组




public static void getArrayProperty(Person person) throws Exception ...{


String[] array = BeanUtils.getArrayProperty(person,"goods");




for(String str : array) ...{


System.out.println(str);


}


}




//BeanUtils.getIndexedProperty()--可以检索目标bean中数组或集合类型的属性指定索引的值




public static void getIndexedProperty(Person person) throws Exception ...{


System.out.println(BeanUtils.getIndexedProperty(person,"goods[0]"));


System.out.println(BeanUtils.getIndexedProperty(person,"goods",1));


}




//BeanUtils.getMappedProperty()--可以检索目标bean中具有map类型的属性中对应键的值




public static void getMappedProperty(Person person) throws Exception ...{


System.out.println(BeanUtils.getMappedProperty(person,"contact(student)"));


System.out.println(BeanUtils.getMappedProperty(person,"contact","teacher"));


}




//BeanUtils.getNestedProperty()--得到目标bean中嵌套属性的值




public static void getNestedProperty(Person person) throws Exception ...{


System.out.println(BeanUtils.getNestedProperty(person,"address.province"));


}




//MethodUtils.invokeMethod()--动态调用方法




public static void invokeMethod() throws Exception ...{


//MethodUtils.invokeMethod(Object arg1,String arg2,Object[] arg3)


//arg1 一个bean的名称


//arg2 指定bean的方法名


//arg3 方法中的参数列表




MethodUtils.invokeMethod(new Person(),"sayHello",new Object[]...{});


//MethodUtils.invokeMethod(Object arg1,String arg2,Object arg3)


//arg1 一个bean的名称


//arg2 指定bean的方法名


//arg3 方法中的参数


MethodUtils.invokeExactMethod(new Person(),"f","hello");;


}




//MethodUtils.getAccessibleMethod()--得到方法




public static void getAccessibleMethod() throws Exception ...{


//MethodUtils.getAccessibleMethod(Class clazz,String methodName,Class[] parameterTypes)


//clazz 一个bean的类对象


//methodName bean中的方法名


//parameterTypes 方法中参数的类型列表




System.out.println(MethodUtils.getAccessibleMethod(Person.class,"f",new Class[]...{String.class}));


System.out.println(MethodUtils.getAccessibleMethod(Person.class,"f",String.class));


}




//ConstructorUtils.invokeConstructor()




public static void invokeConstructor() throws Exception ...{


//ConstructorUtils.invokeConstructor(Class clazz,Object[] args)


//clazz 一个bean的类对象


//args bean的构造函数的参数列表




Person p1 = (Person)ConstructorUtils.invokeConstructor(Person.class,new Object[]...{});


Person p2 = (Person)ConstructorUtils.invokeConstructor(Person.class,"Tom");


System.out.println(p2.getName());


}




//ConstructorUtils.getAccessibleConstructor()




public static void getAccessibleConstructor() throws Exception ...{


//ConstructorUtils.getAccessibleConstructor(Class clazz,Class[] parameterTypes)


//clazz 一个bean的类对象


//parameterTypes bean的构造函数的参数类型列表


System.out.println(ConstructorUtils.getAccessibleConstructor(Person.class,String.class));




System.out.println(ConstructorUtils.getAccessibleConstructor(Person.class,new Class[]...{String.class,String.class}));


}


}

===========================================================================


package com.beanutils;




import java.util.*;


import org.apache.commons.beanutils.*;






public class BasicDynaBeanTest ...{




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


//创建一个动态属性数组




DynaProperty[] properties = new DynaProperty[] ...{


new DynaProperty("name",String.class),


new DynaProperty("sex",String.class),


new DynaProperty("age",int.class),


new DynaProperty("address",Map.class)


};




//创建一个BasicDynaClass的实例


//第一个参数设置动态bean的名称


//第二个参数设置BasicDynaBean的类对象


//第三个参数设置一个动态属性数组


BasicDynaClass dynaClass = new BasicDynaClass("customer",BasicDynaBean.class,properties);


//通过dynaClass得到动态bean的一个实例


DynaBean customer = dynaClass.newInstance();




//给属性设值


Map map = new HashMap();


map.put("province","hunan");


map.put("city","changsha");


map.put("street","wuyilu");


map.put("zipcode","410000");


customer.set("name","Tom");


customer.set("sex","male");


customer.set("age",25);


customer.set("address",map);




System.out.println("name: " + customer.get("name"));


System.out.println("sex: " + customer.get("sex"));


System.out.println("age: " + customer.get("age"));


System.out.println("address: " + ((Map)customer.get("address")).get("province")


+ " " + ((Map)customer.get("address")).get("city")


+ " " + ((Map)customer.get("address")).get("street")


+ " " + ((Map)customer.get("address")).get("zipcode"));


}


}

========================================================================


package com.beanutils;




import org.apache.commons.beanutils.*;






public class ConvertUtilsTest ...{




public static void main(String[] args) ...{


Person person = new Person();


//将任意的实例转变为String，用法非常简单相当与调用toString()方法


System.out.println(ConvertUtils.convert(person));




String str ="123456";


String ary = "45789";


//int ss = Integer.parseInt(str);


Integer s =(Integer)ConvertUtils.convert(str,Integer.class);






String[] values = ...{"123","456","789","aafs"};


Object o = ConvertUtils.convert(values,Integer.class);


System.out.println(o);


}


}

================================================================================


package com.beanutils;




import java.util.*;


import org.apache.commons.beanutils.*;






public class LazyDynaBeanTest ...{




public static void main(String[] args) ...{


//创建一个LazyDynaBean的实例，它就和普通的bean一样


LazyDynaBean customer = new LazyDynaBean();


customer.set("name","Tom");


customer.set("sex","male");


customer.set("age",new Integer(25));


//以map方式给属性赋值，第一个参数是属性名，第二个参数是键，第三个参数是值


customer.set("address","province","hunan");


//如果属性是一个数组或集合，可以以索引方式赋值


//第一个参数是数组名或集合名，第二个参数是索引，第三个参数是数组和集合中存的值


customer.set("orders",0,"order001");


customer.set("orders",1,"order002");




System.out.println("name: " + customer.get("name"));


System.out.println("sex: " + customer.get("sex"));


System.out.println("age: " + customer.get("age"));


System.out.println("address: " + ((Map)customer.get("address")).get("province"));


System.out.println("orders: " + customer.get("orders",0) + " " + customer.get("orders",1));


}


}

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beanutil资料 (737.5 KB)

描述: 里面是两个JAR包和API

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