struts1 记录(数据库1个字段，在jsp页面拆成2个输入框的情况 )

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JSP

数据库1个字段，在jsp页面拆成2个输入框的情况
1
User.java

public class User {
private String name;
private String birthday; // 200906

}

2 UserForm.java

public class UserForm extends ActionForm {

private String username;

private String birthday;

//特别说明，在User.jsp界面，把birthday分成2个widget,一个年份，一个月份
//供用户输入，而不是1个widget,但数据库的字段只有1个birthday

private String birthdayYear;//2009
private String birthdayMonth;//06

public void setBirthdayYear(String birthdayYear) {
     this.birthdayYear = birthdayYear;
}

public void setBirthdayMonth(String birthdayMonth) {
     this.birthdayMonth = birthdayMonth;
}
===================== 底下就不同 =====================
public void setBirthday(String birthday) { //例如birthday = 200906
     this.birthdayYear = birthday.subString(0,4); // =2009
     this.birthdayMonth = birthday.subString(4,6) // = 06
}
=====================================================
public String getBirthdayYear() {
     return birthdayYear;
}
public String getBirthdayMonth() {
     return birthdayMonth;
}
===================== 底下就不同 =====================
public String getBirthday() {
     return birthdayYear + birthdayMonth; //2009+06
}
=====================================================

}

3 User.jsp

<html:text property="username" />
<html:text property="birthdayYear" />
<html:text property="birthdayMonth"/>
=================说明================================
property会调用getField这个方法，显示结果为getField()这个方法的返回直，而不是
field这个直，

而没有<html property='birthday'/>这个widget在jsp页面，而是分成
年份(birthdayYear),月份（birthdayMonth）为2个输入框，

4
从一个数据库查得的一条记录信息显示在jsp界面上
比如:
   a user record {
     username='lu';
     birthday='20090613';
   }

构造一个UserForm，显示在jsp界面
UserForm userForm = new UserForm();

    userForm.setBirthday( user.getBirthday() );
           //说明,调用setBirthday(..);会分别给birthdayYear,birthdayMonth赋直

    userForm.setUsername（user.getBirthday()）;

request.getSession().setAttribute("userform",userForm);

5 显示在jsp界面上的1条记录插入到数据库去
public class SaveAction extends Action {
         public ActionForward execute() {
     UserForm userForm = (UserForm)actionForm;
         User user = new User();

        user.setUsername(userForm.getUsername());

        user.setBirthday(userForm.getBirthday();)
              //说明:userForm.getBirthday() 返回birthdayYear+birthdayMonth

   }

}

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