Struts2.1笔记（七）：Struts2输入校验_type(birthday) is not int-优快云博客

6.1 类型转换错误
遇到类型转换错误的时候（不能进行类型转换时），Struts2框架自动生成一条错误信息，并且将该错误信息
放到addFieldError里面
类型转换错误分为两种
全局类型转换错误：
struts.xml配置文件输入<constant name="struts.custom.i18n.resources" value="message">
src目录下新建一个message.properties,
输入内容为:xwork.default.invalid.fieldvalue={0} error
局部类型转换错误：
与相应的Action类目录一致
名字格式：action类名.properties
内容：invalid.fieldvalue.属性名= message constant
如显示age类型转换错误信息提示
invalid.fieldvalue.age= age conversion error

6.2 输入校验
6.2.1手动完成输入校验
重写validate()方法
下面是一个完整的输入校验重写validate()方法的代码
public void validate() {
  if(null == username || username.length() < 6 || username.length() > 10) {
   this.addFieldError("username", "username invalid");
  }
  if (null == password || password.length() < 6 || password.length() > 15) {
   this.addFieldError("password", "password invalid");

  } else if (null == repassword || repassword.length() < 6
    || repassword.length() > 15) {
   this.addFieldError(repassword, "repassword in valid");
  } else if (!repassword.equals(password)) {
   this.addFieldError("password", "two passwords not the same");
  }
  if(age<=0||age>150){
   this.addFieldError("age", "age invalid");
  }
  if(null == birthday)
  {
   this.addFieldError("birthday","birthday invalid");
  }
  if(null == graduation)
  {
   this.addFieldError("graduation","graduation invalid");
  }
  if(null != birthday && null != graduation)
  {
   Calendar c1 = Calendar.getInstance();
   c1.setTime(birthday);

   Calendar c2 = Calendar.getInstance();
   c2.setTime(graduation);

   if(!c1.before(c2))
   {
    this.addFieldError("birthday","birthday should be before graduation");
   }
  }
  6.2.2 内建校验器
  Struts2提供了大量的内建校验器
  内建校验器是一个xml文件，与相应Action处理类目录一致
  分为：字段校验器（校验谁？用哪种校验器？）
       非字段校验器（用哪种校验器？校验谁？）

  名字格式：Action类型-validation.xml
  -validation.xml是固定的
  关于内建校验器内容可查阅Struts2 API com.opensymphony.xwork2.validator.validators 包下的class
  下面是一个关于内建校验器的代码（字段校验器）
  <?xml version="1.0" encoding="GBK"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
<validators>

<field name="username">
  <field-validator type="requiredstring">
  
   <param name="trim">true</param>
   
   <message>username is required</message>
  </field-validator>
</field>

<field name="username">
  <field-validator type="stringlength">
  
   <param name="minLength">6</param>
   
   <param name="maxLength">12</param>
   
   <message>username is 6 and 12</message>
  </field-validator>
</field>

<field name="password">
  <field-validator type="requiredstring">
   <param name="trim">true</param>
   <message>password is required</message>
  </field-validator>
</field>

<field name="password">
  <field-validator type="stringlength">
   <param name="minLength">6</param>
   <param name="maxLength">14</param>
   <message>password is 6 and 14</message>
  </field-validator>
</field>

<field name="repassword">
  <field-validator type="requiredstring">
   <param name="trim">true</param>
   <message>repassword is required</message>
  </field-validator>
</field>

<field name="repassword">
  <field-validator type="stringlength">
   <param name="minLength">6</param>
   <param name="maxLength">14</param>
   <message>repassword is 6 and 14</message>
  </field-validator>
</field>

<field name="age">
  <field-validator type="int">
   <param name="min">1</param>
   <param name="max">150</param>
   <message>username is 1 and 150</message>
  </field-validator>
</field>

<field name="birthday">
  <field-validator type="date">
   <param name="min">1989-04-14</param>
   <param name="max">2009-04-14</param>
   <message>birthday is 1989-04-14 to 2009-04-14</message>
  </field-validator>
</field>

<field name="birthday">
  <field-validator type="required">
   <message>birthday is not blank!</message>
  </field-validator>
</field>

  <field name="graduation">
  <field-validator type="date">
   <param name="min">1999-04-14</param>
   <param name="max">20019-04-14</param>
   <message>birthday is 1999-04-14 to 2019-04-14</message>
  </field-validator>
</field>

  <field name="graduation">
  <field-validator type="required">
   <message>graduation is not blank!</message>
  </field-validator>
</field>
</validators>