目录结构 com.hkls.jdbc.example|-----dao| |-----UsersDao.java||-----domain| |-----User.java||-----utils| |-----JDBCUtils.java||-----JdbcInsertTest.java|-----JdbcDeleteTest.java|-----JdbcUpdateTest.java|-----JdbcFindAllUsersTest.java|----
          com.hkls.jdbc.example |-----dao | |-----UsersDao.java | |-----domain | |-----User.java | |-----utils | |-----JDBCUtils.java | |-----JdbcInsertTest.java |-----JdbcDeleteTest.java |-----JdbcUpdateTest.java |-----JdbcFindAllUsersTest.java |-----JdbcFindUserByIdTest.java1 创建JavaBean
package com.hkls.jdbc.example.domain;
import java.util.Date;
public class User {
    private int id;
    private String username;
    private String password;
    private String email;
    private Date birthday;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    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 String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
}
        
        