JavaBean（实体类）

JAVAweb

九、JavaBean（实体类）

JavaBean有特定的写法：

• 必须要有一个无参构造
• 属性必须私有化
• 必须有对应的get/set方法；

一般用来和数据库的字段做映射 ORM；

ORM ：对象关系映射

• 表—>类
• 字段–>属性
• 行记录---->对象

一张数据库表对应一个java实体类：

数据库表：

实体类：

package com.lengzher.entity;

import java.util.Date;

public class smbms_role {
    private int id;
    private String roleCode;
    private String roleName;
    private String creatBy;
    private Date creationDate;
    private String modifyBy;
    private Date modifyDate;

    public smbms_role() {
    }

    public smbms_role(int id, String roleCode, String roleName, String creatBy, Date creationDate, String modifyBy, Date modifyDate) {
        this.id = id;
        this.roleCode = roleCode;
        this.roleName = roleName;
        this.creatBy = creatBy;
        this.creationDate = creationDate;
        this.modifyBy = modifyBy;
        this.modifyDate = modifyDate;
    }

    public int getId() {
        return id;
    }

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

    public String getRoleCode() {
        return roleCode;
    }

    public void setRoleCode(String roleCode) {
        this.roleCode = roleCode;
    }

    public String getRoleName() {
        return roleName;
    }

    public void setRoleName(String roleName) {
        this.roleName = roleName;
    }

    public String getCreatBy() {
        return creatBy;
    }

    public void setCreatBy(String creatBy) {
        this.creatBy = creatBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public String getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(String modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }

    @Override
    public String toString() {
        return "smbms_role{" +
                "id=" + id +
                ", roleCode='" + roleCode + '\'' +
                ", roleName='" + roleName + '\'' +
                ", creatBy='" + creatBy + '\'' +
                ", creationDate=" + creationDate +
                ", modifyBy='" + modifyBy + '\'' +
                ", modifyDate=" + modifyDate +
                '}';
    }
}