经过历时三天的鏖战,终于将阶段性项目——新闻发布系统做完了。在编码过程中,发现了很多冗余代码,统一流程,却需要不断重复编码——将用户输入实例化为对象的过程。
例:
Person.set("id", 1);
Person.set("name", "hu");
Person.set("birthday", new Date());
基于此我将该过程中间过程抽离出来,采用反射机制,遍历所有属性名获取对应的值,并将其放进实例化对象,达到封装不变部分的目的。
话不多说直接上代码:
Person.java
package com.blk.entity; import java.util.Date; public class Person {
private int pid;
private String name;
private Date birthday; public Person() {
super();
} public int getPid() {
return pid;
} public void setPid(int pid) {
this.pid = pid;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public Date getBirthday() {
return birthday;
} public void setBirthday(Date birthday) {
this.birthday = birthday;
} @Override
public String toString() {
return "Person [birthday=" + birthday + ", name=" + name + ", pid="
+ pid + "]";
} }
ToBean.java
package com.blk.demo; import java.util.Date;
import java.util.HashMap;
import java.util.Map; import com.blk.dao.ToBean;
import com.blk.entity.Person; public class Test {
public static void main(String[] args) throws InstantiationException, IllegalAccessException {
// 创建map对象,并进行数据
Map<String, Object> map = new HashMap<String, Object>();
map.put("pid", 1);
map.put("name", "hu");
map.put("birthday", new Date()); // 将map对象转化为实体类对象
Person p = (Person)ToBean.toBean(map, Person.class);
System.out.println(p.toString());
}
}
测试代码:Test.java
package com.blk.demo; import java.util.Date;
import java.util.HashMap;
import java.util.Map; import com.blk.dao.ToBean;
import com.blk.entity.Person; public class Test {
public static void main(String[] args) throws InstantiationException, IllegalAccessException {
// 创建map对象,并进行数据
Map<String, Object> map = new HashMap<String, Object>();
map.put("pid", 1);
map.put("name", "hu");
map.put("birthday", new Date()); // 将map对象转化为实体类对象
Person p = (Person)ToBean.toBean(map, Person.class);
System.out.println(p.toString());
}
}