Stripes tips(13)- 多页面表单处理

Struts 1 内置了多步提交表单的方案，在 ActionForm 添加一个 page 属性，指定当前是第几步，将 ActionForm 放入 Session 中，或者在下一步表单中使用隐藏属性存放其上一步的表单数据，保证多步表单数据不丢失。Stripes 也提供了一种有效的方式，来处理多步提交。

回到注册程序，在填写注册信息之前，要求用户先阅读相关协议。

创建一个阅读协议 JSP 页面。

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="stripes" uri="" %>
   "">


    
        
        
    
    
        
Read User License!

        
        

            License,License,License,License,License,License,
            License,License,License,License,License,License,
            License,License,License,License,License,License,
            License,License,License,License,License,License,
            License,License,License,License,License,License,
        

        
             I have read the license and gree with the content.
            
        
    

		
		

在RegisterActionBean中添加一个属性 acceptLicense ，类型为 boolean ，并添加相应的 event 方法。

@Wizard(startEvents = "readLicense")
public class RegisterActionBean extends BaseActionBean {

    @Validate(required = true, mask = "[0-9a-zA-Z]{6,20}")
    private String username;
    @Validate(required = true, minlength = 6, maxlength = 20, mask = "[0-9a-zA-Z]+")
    private String password;
    @Validate(required = true, converter = EmailTypeConverter.class)
    private String email;
    @Validate(required = true, expression = "this eq password")
    private String confirmPassword;
    @Validate(converter = DateTypeConverter.class)
    Date birthDate;
    @Validate(converter = BooleanTypeConverter.class)
    boolean subscriptionEnabled;
    @ValidateNestedProperties({
        @Validate(field = "zipcode", required = true),
        @Validate(field = "addressLine1", required = true),
        @Validate(field = "addressLine2", required = true)
    })
    private Address address;

    
    private boolean acceptLicense = false;

    public boolean isAcceptLicense() {
        return acceptLicense;
    }

    public void setAcceptLicense(boolean acceptLicense) {
        this.acceptLicense = acceptLicense;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public Date getBirthDate() {
        return birthDate;
    }

    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }

    public boolean isSubscriptionEnabled() {
        return subscriptionEnabled;
    }

    public void setSubscriptionEnabled(boolean subscriptionEnabled) {
        this.subscriptionEnabled = subscriptionEnabled;
    }

    public String getConfirmPassword() {
        return confirmPassword;
    }

    public void setConfirmPassword(String confirmPassword) {
        this.confirmPassword = confirmPassword;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    @DefaultHandler
    public Resolution register() {
        return new ForwardResolution("/success.jsp");
    }

    @ValidationMethod(on = "register")
    public void userExsited(ValidationErrors errors) {
        if ("testuser".equals(username)) {
            errors.add("username", new SimpleError("This username is taken , please select a different one."));
        }
        if (!errors.isEmpty()) {
            errors.addGlobalError(new SimpleError("Error ocurs on save. Please fix it firstly."));
        }
    }

    public Resolution readLicense() {
        return new ForwardResolution("/readlicense.jsp");
    }

    @DontValidate
    public Resolution back() {
        return new ForwardResolution("/readlicense.jsp");
    }

    @ValidationMethod(on = "prepareRegister")
    public void mustAcceptLicense(ValidationErrors errors) {
        if (this.acceptLicense == false) {
            errors.add("acceptLicense", new SimpleError("You must agree with the content of the license."));
        }
        if (!errors.isEmpty()) {
            errors.addGlobalError(new SimpleError("Error ocurs on save. Please fix it firstly."));
        }
    }

    public Resolution prepareRegister() {
        return new ForwardResolution("/register.jsp");
    }
}
		
		

Stripes 提供了 Wizard Annotation 保证多个页面的表单处理起来像在个页面一样。

在 register.jsp 页面添加一个回退到第一步按钮。

现在运行这个程序来体验一下。