Struts2中的验证框架
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通过注解的方式，可以让方法不用验证
@SkipValidation public String toRegView() { System.out.println("toRegView"); return "regView"; }
public class ValidateAction extends ActionSupport { private static final long serialVersionUID = -6933309304624396640L; private String name; private Integer age; private String password ; private String confirmPassword ; public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getConfirmPassword() { return confirmPassword; } public void setConfirmPassword(String confirmPassword) { this.confirmPassword = confirmPassword; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public String reg() { return "success"; } @SkipValidation public String toRegView() { System.out.println("toRegView"); return "regView"; } }
ActionName-validation.xml
<validators> <field name="name"> <field-validator type="requiredstring"> <message>name is required</message> </field-validator> <field-validator type="stringlength"> <param name="minLength">5</param> <param name="maxLength">10</param> <message key="error.name.length" /> </field-validator> <field-validator type="email"> <message>name is invalid email address!</message> </field-validator> </field> <field name="age"> <field-validator type="required"> <message>age is required</message> </field-validator> <field-validator type="int"> <param name="min">20</param> <param name="max">100</param> <message>age rang is wrong!</message> </field-validator> </field> <validator type="expression"> 注意这里不是进行字段的校验，所以不用field，用validator <param name="expresssion">password == confirmPassword</param> 验证密码是否一致 <message>password input isn‘t the same!</message> </validator> </validators>
考虑到国际化的关系，如果把验证的错误提示写在验证的配置文件里，这样就没办法做到国际化
此时应该把错误提示放到一个配置文件中。
在action同目录下，新建一个配置文件，命名规则为：ActionName.properties
error.name.length=${name} is goog name,but length must be between ${minLength} and ${maxLength}.
在配置文件中定义名字长度错误的信息
此时还需要把此处定义信息的key与验证配置文件关联：
<validators> <field name="name"> <field-validator type="requiredstring"> <message>name is required</message> </field-validator> <field-validator type="stringlength"> <param name="minLength">5</param> <param name="maxLength">10</param> <message key="error.name.length" />这里的key与上面关联 </field-validator> </field> </validators>
<html> <head> <title>reg.jsp</title> </head> <body> <s:actionerror/> 这句是显示密码是否一致的错误消息，与字段错误的消息提示不同 <s:form namespace="/validate" action="ValidateAction_reg" method="post" theme="xhtml"> <s:textfield name="name" label="UserName" /> <s:textfield name="age" label="UserAge" /> <s:textfield name="password" label="password" /> <s:textfield name="confirmPassword" label="confirmPassword" /> <s:submit /> </s:form> </body> </html>
注意：上面的校验是服务端校验，如果想让客户端校验，可以在form表单加一个属性
<html> <head> <title>reg.jsp</title> </head> <body> <s:actionerror/> <s:form namespace="/validate" action="ValidateAction_reg" method="post" theme="xhtml" validate="true"> 加这个属性，就是客户端校验 <s:textfield name="name" label="UserName" /> <s:textfield name="age" label="UserAge" /> <s:textfield name="password" label="password" /> <s:textfield name="confirmPassword" label="confirmPassword" /> <s:submit /> </s:form> </body> </html>
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