struts2中手動完成輸入校驗
手動校驗是通過重寫validate()方法來實現的
以登入為例：
1.Login.jsp程式碼
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Login</title>
</head>
<body>
<s:form action="Login.action">
<s:textfield name="name" label="Name"/>
<s:fielderror>
<s:param>name.xml</s:param>
</s:fielderror>
<s:password name="password" label="Password"/>
<s:fielderror>
<s:param>password.xml</s:param>
</s:fielderror>
<s:submit value="Login"/>
</s:form>
</body>
</html>
2.Login.java程式碼
import com.opensymphony.xwork2.ActionSupport;
public class Login extends ActionSupport {
private String name;
private String password;
private String message;
public String execute(){
message = "Welcome, xml!";
return SUCCESS;
}
public void validate(){ //這裡必須為validate()方法
if(!name.equalsIgnoreCase("xml")){
this.addFieldError("name.xml", "使用者名稱必須為xml");
this.addActionError("使用者名稱錯誤，登入失敗");
}
if(!password.equalsIgnoreCase("xml")){
this.addFieldError("password.xml", "密碼必須為xml");
this.addActionError("密碼錯誤，登入失敗");
}
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
3.struts.xml檔案中進行關聯
<action name="Login" class="com.koubei.Login">
<result name="success">/Welcome.jsp</result>
<result name="input">/Login.jsp</result>
</action>
4.登入成功頁面
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>welcome</title>
</head>
<body>
<h1>${message}</h1>
</body>
</html>
這裡驗證validate()方法是自動呼叫的