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案例-用户登录

boomwu 2022-04-14 阅读 83

流程说明

 

1.用户填写用户名密码,提交到LoginServlet

2.在Login Servlet中使用Mybatis查询数据库,验证用户名密码是否正确

3.如果正确,响应“登录成功”,如果错误,响应“登录失败”

环境准备:

1.静态页面添加到项目的webapp目录下

2.创建db1数据库,创建tb_user表,创建User实体类

3.导入Mybatis坐标,MySQL驱动坐标

4.创建mybatis-config.xml核心配置文件,UserMapper.xml映射文件,UserMapper接口

二:数据库

实体类

package com.chunmei.pojo;

public class User {
    private Integer id;
    private String username;
    private String password;

    public Integer getId() {
        return id;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

三:在pom.xml中导入

<dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.6</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.25</version>
    </dependency>

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