前几天自学了策略模式，所以写个例子来验证学习
例子说明：对于学校的教务系统的登陆，各个高校的情况不一样，为了实现代码的可扩展性和维护性，我用策略模式去封装，也不知道合适不合适的，望大神指点
策略接口（Login）：定义了学校登陆login抽象方法
策略上下文（ContextOfLogin）: 策略使用的上下文
具体策略（LoginStrategyOfSISE）: 具体策略我只写了自己学校的，其他学校没去调研，所以没有写。
好了，不多说了，直接上代码
login
package com.sise.luming;
/**
* @author USER
* 登陆策略的接口
*/
public interface Login {
public boolean login(String username, String password);
}ContextOfLogin
package com.sise.luming;
/**
* @author USER
* 策略上下文
*/
public class ContextOfLogin {
private Login login;
public void setLogin(Login login) {
this.login = login;
}
public boolean getLoginResult(String username, String password) {
if(login!=null) {
System.out.println("具体策略为："+login.getClass());
return login.login(username,password);
}else{
System.out.println("具体策略为null");
return false;
}
}
}LoginStrategyOfSISE
package com.sise.luming;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/**
* @author USER
* 实现策略Login接口，实现具体的算法,SISE登陆的具体策略
*/
public class LoginStrategyOfSISE implements Login{
@Override
public boolean login(String username,String password) {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost post = new HttpPost("http://class.sise.com.cn:7001/sise/login_check_login.jsp");
//开始登陆
//封装post请求参数
List<NameValuePair> formparams = new ArrayList<NameValuePair>();
formparams.add(new BasicNameValuePair("08e7a22bca3fd77141e6faa335c5d402", "4756a1c591ef421a90785fec028e98cf"));
formparams.add(new BasicNameValuePair("username", username));
formparams.add(new BasicNameValuePair("password", password));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams,Consts.UTF_8);
post.setEntity(entity);
//获取响应结果
try {
HttpResponse response = httpclient.execute(post);
HttpEntity entity1 = response.getEntity();
if (entity!=null) {
if(EntityUtils.toString(entity1).contains("<script>top.location.href='/sise/index.jsp'</script>")) {
System.out.println("登陆成功");
return true;
}
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
post.releaseConnection();
}
System.out.println("登陆失败");
return false;
}
}Main
package com.sise.luming;
public class Main {
public static void main(String[] args) {
String username = "yourusername"; //登陆账号
String password = "yourpassword"; //登陆密码
ContextOfLogin login = new ContextOfLogin();
login.setLogin(new LoginStrategyOfSISE()); //设置SISE登陆策略
boolean flag = login.getLoginResult(username,password); //获取登陆结果
System.out.println("登陆的结果是："+flag);
}
}运行结果
具体策略为：class com.sise.luming.LoginStrategyOfSISE
登陆失败
登陆的结果是：false
