javaBean
是一种实体类
JavaBean有特定的写法
-
必须有一个无参构造
-
属性必须私有化
-
必须有对应的get，set方法
一般用来和数据库字段做映射：ORM
ORM：对象关系映射
-
表-->类
-
字段-->属性
-
行记录-->对象
实现
创建数据库，
创建对应实体类
//实体类，和数据库中的表结构一一对应
public class People {
private int id;
private String name;
private int age;
private String address;
public People(int id, String name, int age, String address) {
this.id = id;
this.name = name;
this.age = age;
this.address = address;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "People{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
", address='" + address + '\'' +
'}';
}
}
用jsp去创建一个实体对象
<body> <% // People people = new People(); %> <jsp:useBean id="people" class="com.gu.pojo.People" scope="page"> </jsp:useBean> <jsp:setProperty name="people" property="address" value="hunan"></jsp:setProperty> <jsp:setProperty name="people" property="name" value="gugu"></jsp:setProperty> <jsp:setProperty name="people" property="age" value="18"></jsp:setProperty> <jsp:setProperty name="people" property="id" value="1"></jsp:setProperty> <jsp:getProperty name="people" property="name"/> <jsp:getProperty name="people" property="id"/> <jsp:getProperty name="people" property="age"/> <jsp:getProperty name="people" property="address"/> </body>
over
标签：name,age,public,String,javaBean,address,id,day,105 From： https://www.cnblogs.com/GUGUZIZI/p/17430568.html