实现跨页表单的提交

时间：2011-01-09 来源：李湛斌

1，建立一个ActionForm，有3个域，分别是name，password，email，不用添加JSP

2.建立一个jsp，名字叫register1.jsp，代码如下

<html:form action="/register1.do" method="post">
    username:<html:text property="username"/>
    <html:errors property="username" />
    password:<html:text property="password"/>
    <html:errors property="password" />
    <input type="hidden" name="page" value="1"/>
    <html:submit/>

3.建立另外一个jsp，名字叫register2.jsp，代码如下

<html:form action="/register1.do" method="post">
    username:<html:text property="username"/>
    <html:errors property="username" />
    password:<html:text property="password"/>
    <html:errors property="password" />
    <input type="hidden" name="page" value="1"/>
    <html:submit/>

4.建立2个Action，分别是/register1和/register2，如下图所示

5.编辑ActionForm的validate方法写入针对表单域的验证代码

public ActionErrors validate(ActionMapping mapping,
            HttpServletRequest request) {
        ActionErrors errors=new ActionErrors();
        if (request.getParameter("page").equals("1")) {
            if ("".equals(request.getParameter("username"))) {
                errors.add("username",new ActionMessage("usernamenull"));
            }
            if ("".equals(request.getParameter("password"))) {
                errors.add("password", new ActionMessage("passwordnull"));
            }
        }
        if (request.getParameter("page").equals("2")) {
            if ("".equals(request.getParameter("email"))) {
                errors.add("email", new ActionMessage("emailnull"));
            }
        }
        return errors;
    }

6.编辑资源文件

7.编辑Register1Action代码，主要是跳到输入email的页面，代码如下

PersonalForm personalForm = (PersonalForm) form;// TODO Auto-generated method stub
        System.out.println(personalForm.getUsername());
        System.out.println(personalForm.getPassword());
        return mapping.findForward("step2");

8.编辑Register2Action代码，主要是输出用户名，密码，邮箱地址，完成注册

PersonalForm personalForm = (PersonalForm) form;// TODO Auto-generated method stub
        System.out.println(personalForm.getUsername());
        System.out.println(personalForm.getPassword());
        System.out.println(personalForm.getEmail());
        return null;

9.增加一个ActionForward