Struts2 接收参数

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（省略部分代码）
1.用Action的属性接收参数
2.DomainModel接收参数

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;    }}

public class LoginAction extends ActionSupport {    private User user;    @Override    public String execute() throws Exception {        System.out.println(user.getUsername());        System.out.println(user.getPassword());        return SUCCESS;    }    public User getUser() {        return user;    }    public void setUser(User user) {        this.user = user;    }}

3.ModelDriven接收参数

public class LoginAction extends ActionSupport implements ModelDriven<User> {    private User user = new User();    @Override    public String execute() throws Exception {        System.out.println(user.getUsername());        System.out.println(user.getPassword());        return SUCCESS;    }    public User getModel() {        return user;    }

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