struts2 使用Validation框架验证数据

model

public class User implements java.io.Serializable {

// Fields

private Integer userId;
private String userName;
private String userTrueName;
private String userPassword;
private Date createDate;

....

get

set

}

action

public class UserAction extends ActionSupport{

private IUserService userService;
private User user;
private int userId;

public String userLogin() throws Exception{
String userName = user.getUserName();
String userPassword = user.getUserPassword();
if(userName != null && !userName.equals("")) {
//System.out.println(userName);
User u = userService.findByName(userName);
if(u == null || u.equals("")) {
this.addFieldError("user.userName", "用户名不正确，请重新输入");
return "error";
} else if(!u.getUserPassword().equals(userPassword)) {
this.addFieldError("user.userPassword", "密码不正确，请重新输入");
return "error";
} else {
getSession().setAttribute("userId", u.getUserId());
getSession().setAttribute("userName",userName);
getSession().setAttribute("userTrueName",u.getUserTrueName());
getSession().setAttribute("password",userPassword);
return "success";
}
} else {
return "input";
}
}

....

get

set

}

同个包下：UserAction-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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="user.userName">
<field-validator type="requiredstring">
<message>登录的用户名不能为空</message>
</field-validator>
<field-validator type="regex">
<param name="expression">^[a-zA-Z][a-zA-Z0-9_]{1,15}$</param>
<message>登录的用户名必须以字母开始，后面跟字母、数字或_，长度为1-15位</message>
</field-validator>
</field>

<field name="user.userPassword">
<field-validator type="requiredstring">
<message>登录的密码不能为空</message>
</field-validator>
<field-validator type="regex">
<param name="expression">^[a-zA-Z0-9!@#]{1,15}$</param>
<message>登录的密码可以由字母、数字和! @ # 组成，长度为1-15位</message>
</field-validator>
</field>
</validators>

出错提示文字字体颜色，添加样式

.label {font-style:italic; }
.errorLabel {font-style:italic;color:red; }
.errorMessage {color:red; }