Spring 2.X 深入了解 ------->Resource操作和Validator

Spring的 package com.chenhailong.validator;/** * @author cnchenhl * Aug 22, 2011 */public class Person { private String name; private int age; /** * @return the name */ public String getName() { return name; } /** * @return the age */ public int getAge() { return age; } /** * @param name the name to set */ public void setName(String name) { this.name = name; } /** * @param age the age to set */ public void setAge(int age) { this.age = age; }}?

package com.chenhailong.validator;import org.springframework.validation.Errors;import org.springframework.validation.ValidationUtils;import org.springframework.validation.Validator;/** * @author cnchenhl * Aug 22, 2011 */public class PersonValidator implements Validator {    @Override    public boolean supports(Class clazz) {        return Person.class.equals(clazz);    }    @Override    public void validate(Object obj, Errors e) {        ValidationUtils.rejectIfEmpty(e, "name", "name.empty");        Person p = (Person) obj;        if (p.getAge() < 0) {            e.rejectValue("age", "negativevalue");        } else if (p.getAge() > 100) {            e.rejectValue("age", "too.darn.old");        }    }}

package com.chenhailong.validator;import java.util.List;import org.springframework.validation.BindException;import org.springframework.validation.Errors;import org.springframework.validation.ObjectError;/** * @author cnchenhl * Aug 22, 2011 */public class SpringValidator {    /**     * @param args     */    public static void main(String[] args) {        PersonValidator pv = new PersonValidator();        Person person = new Person();        person.setAge(-10);        person.setName("");        pv.supports(Person.class);        Errors e = new BindException(person, "person");        pv.validate(person, e);        List list = e.getAllErrors();        for (int i = 0; i < list.size(); i++) {            System.out.println(((ObjectError) list.get(i)).getCode());        }    }}