<s:form action="conversion"><s:textfield name="age" label="Age"></s:textfield><s:textfield name="birth" label="Birth"></s:textfield><s:submit></s:submit></s:form>

package com.converters;import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;import javax.servlet.ServletContext;import org.apache.struts2.ServletActionContext;
import org.apache.struts2.util.StrutsTypeConverter;public class DateConverter extends StrutsTypeConverter {private DateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");public DateConverter() {//System.out.println("DateConverter's constructor...");
    }@Overridepublic Object convertFromString(Map context, String[] values, Class toClass) {//System.out.println("convertFromString...");if(toClass == Date.class){if(values != null && values.length > 0){//String转换成DataString value = values[0];//System.out.println(value);try {return dateFormat.parseObject(value);} catch (ParseException e) {e.printStackTrace();}}}//若没有转换成功, 则返回 valuesreturn values;}@Overridepublic String convertToString(Map context, Object o) {//Data转换成String到页面System.out.println("convertToString...");if(o instanceof Date){Date date = (Date) o;return dateFormat.format(date);}//若转换失败返回 nullreturn null;}}

java.util.Date=com.converters.DateConverter

package com.converters;import java.util.Date;public class Student {private int age;public void setAge(int age) {this.age = age;}public int getAge() {return age;}private Date birth;//Data型public void setBirth(Date birth) {this.birth = birth;}public Date getBirth() {return birth;}@Overridepublic String toString() {return "Student [age=" + age + ", birth=" + birth + "]";}}

package com.converters;import java.util.Date;import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;public class ConversionAction extends ActionSupport implements ModelDriven<Student>{/*** */private static final long serialVersionUID = 1L;public String execute(){System.out.println("Student: " + stu);return "success";}private Student stu;@Overridepublic Student getModel() {stu = new Student();return stu;}}