import java.beans.PropertyDescriptor;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.sql.Timestamp;class Person {    private String name;    private int age;    private Timestamp birth;    public Timestamp getBirth() {        return birth;    }    public void setBirth(Timestamp birth) {        this.birth = birth;    }    public String getName() {        return this.name;    }    public void setName(String name) {        this.name = name;    }    public void setAge(int age) {        this.age = age;    }    public int getAge() {        return this.age;    }}/*****************************************************/public class InvokeSetterMethod {    public static void main(String[] args) {        Person p = new Person();        invokeSetterMethodByType(p, Person.class, "java.sql.Timestamp",                Timestamp.valueOf("1111-11-11 11:11:11"), Timestamp.class);         p.setBirth(Timestamp.valueOf("2014-12-11 00:00:00"));        System.out.println(p.getBirth());    }    /**     * 调用setter方法     *      * @param obj     * @param att     * @param value     * @param type     */    public static void invokeSetterMethodByType(Object obj, Class cl,            String methodType, Timestamp param, Class
      paramType) {        try {            Field[] f = cl.getDeclaredFields();            for (Field field : f) {                // 属性类型                String type = field.getType().getName();                // 属性名                String name = field.getName();                // 属性值                PropertyDescriptor pd = new PropertyDescriptor(field.getName(),                        cl);                Method getMethod = pd.getReadMethod();                Object o = getMethod.invoke(obj);                // 当Timestamp类型的属性值为null时，设置默认值                if (methodType.equals(type) && null == o) {                    setter(obj, name, param, paramType);                }            }        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 调用setter方法     *      * @param obj     * @param att     * @param value     * @param type     */    public static void setter(Object obj, String att, Object value,            Class
      type) {        try {            Method met = obj.getClass().getMethod("set" + initStr(att), type);            met.invoke(obj, value);        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 调用getter方法     *      * @param obj     * @param att     */    public static void getter(Object obj, String att) {        try {            Method met = obj.getClass().getMethod("get" + initStr(att));            System.out.println(met.invoke(obj));        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 将单词的首字母大写     *      * @param old     * @return     */    public static String initStr(String old) {        String str = old.substring(0, 1).toUpperCase() + old.substring(1);        return str;    }}