struts2属性驱动与模型驱动

1. struts2属性驱动与模型驱动

user.java

package com.andrew.model;
public class User {
    private String userName;
    private String password;
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

UserService.java

package com.andrew.service;
import com.andrew.model.User;
public class UserService {
    public boolean login(User user) {
        if ("andrew".equals(user.getUserName()) && "123456".equals(user.getPassword())) {
            return true;
        } else {
            return false;
        }
    }
}

success.jsp

登录成功！

error.jsp

登录失败！

1) 属性驱动(FieldDriven)

1.1) 基本数据类型属性

UserAction.java

package com.andrew.action;
import com.andrew.model.User;
import com.andrew.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport {
    private UserService userService = new UserService();
    private String userName;
    private String password;
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String execute() throws Exception {
        System.out.println("执行了UserAction的默认方法");
        User user = new User();
        user.setUserName(userName);
        user.setPassword(password);
        if (userService.login(user)) {
            return SUCCESS;
        } else {
            return ERROR;
        }
    }
}

struts.xml

<action name="user" class="com.andrew.action.UserAction">
      <result name="success">success.jsp</result>
      <result name="error">error.jsp</result>
</action>

login.jsp

<form action="user" method="post">
    用户名：<input type="text" name="userName"/>
    密码：<input type="text" name="password"/>
    <input type="submit" value="登录"/>
</form>

http://localhost:8080/HeadFirstStruts2Chap02/login.jsp
abc 123 submit
运行结果：
登录失败！ 
控制台：
执行了UserAction的默认方法
andrew 123456 submit
运行结果：
登录成功！
控制台：
执行了UserAction的默认方法

1.2) JavaBean类型属性

UserAction2.java

package com.andrew.action;
import com.andrew.model.User;
import com.andrew.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction2 extends ActionSupport {
    private UserService userService = new UserService();
    private User user;
    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    @Override
    public String execute() throws Exception {
        System.out.println("执行了UserAction2的默认方法");
        if (userService.login(user)) {
            return SUCCESS;
        } else {
            return ERROR;
        }
    }
}

struts.xml

<action name="user2" class="com.andrew.action.UserAction2">
      <result name="success">success.jsp</result>
      <result name="error">error.jsp</result>
</action>

login2.jsp

<form action="user2" method="post">
    用户名：<input type="text" name="user.userName"/>
    密码：<input type="text" name="user.password"/>
    <input type="submit" value="登录"/>
</form>

http://localhost:8080/HeadFirstStruts2Chap02/login2.jsp
abc 123 submit
运行结果：
登录失败！ 
控制台：
执行了UserAction2的默认方法
andrew 123456 submit
运行结果：
登录成功！
控制台：
执行了UserAction2的默认方法

2) 模型驱动(ModelDriven)

现实接口 implements ModelDriven<xxx>

UserAction3.java

package com.andrew.action;
import com.andrew.model.User;
import com.andrew.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class UserAction3 extends ActionSupport implements ModelDriven<User> {
    private UserService userService = new UserService();
    private User user = new User();
    @Override
    public String execute() throws Exception {
        System.out.println("执行了UserAction3的默认方法");
        if (userService.login(user)) {
            return SUCCESS;
        } else {
            return ERROR;
        }
    }
    public User getModel() {
        return user;
    }
}

struts.xml

<action name="user3" class="com.andrew.action.UserAction3">
      <result name="success">success.jsp</result>
      <result name="error">error.jsp</result>
</action>

login3.jsp

<form action="user3" method="post">
    用户名：<input type="text" name="userName"/>
    密码：<input type="text" name="password"/>
    <input type="submit" value="登录"/>
</form>

http://localhost:8080/HeadFirstStruts2Chap02/login3.jsp
abc 123 submit
运行结果：
登录失败！ 
控制台：
执行了UserAction3的默认方法
andrew 123456 submit
运行结果：
登录成功！
控制台：
执行了UserAction3的默认方法