struts2-5-登录校验(属性驱动)

一：用户封装到JavaBean中-->nuc.sw.vo-->User.java

package nuc.sw.vo;

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;
    }
}

二：修改LoginRegAction.java   实例化User类

     一定要使用get  set方法 ；否则会是空指针

private User user;

    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }

之前的username也要做相应的变化-->user.getUsername()

@Override
    public String execute() throws Exception {
//    public String LoginMethod() throws Exception {
        // TODO Auto-generated method stub
        //登录逻辑
        if(user.getUsername().equals("zd")&&user.getPassword().equals("123")){
            ActionContext.getContext().getSession().put("user",user.getUsername());
            ActionContext.getContext().getSession().put("pass",user.getPassword());
            return SUCCESS;
        }
        else{
            
            ActionContext.getContext().put("error", "用户名或者密码错误");
            return ERROR;
        }
        
    }
    @Override
    public void validate() {
        // TODO Auto-generated method stub
        if(user.getUsername()==null||user.getUsername().trim().equals(""))
            this.addFieldError("usernameError", "<font color='red'>用户名不能为空</font>");
        if(user.getPassword()==null||user.getPassword().trim().equals(""))
            this.addFieldError("passwordError", "<font color='red'>密码不能为空</font>");
        
    }

三：修改login.jsp

  用户名：<input type="text" name="user.username"><br>
  密码:<input type="text" name="user.password"><br>

四：项目结构

五：运行结果

 

正确：

错误：

 

数据校验：