实战重构工厂模式

工厂模式

实战

待优化业务逻辑代码

/**
 * @author sunyang
 * @date 2019/1/30 10:32
 */
public class bizuser {

    public string getshowmorenum(long shownumredis) {
        string  result= string.valueof(shownumredis);
        if (shownumredis >= 10 && shownumredis <= 99){
            string code = string.valueof(shownumredis);
            string first = code.substring(0, 1);
            result = first + "0+";
        }else if (shownumredis >= 100 && shownumredis <=999){
            string code = string.valueof(shownumredis);
            string first = code.substring(0, 1);
            result = first + "00+";
        }else if (shownumredis >= 1000 && shownumredis <=9999){
            string code = string.valueof(shownumredis);
            string first = code.substring(0, 1);
            result = first + "000+";
        }else if (shownumredis > 9999){
            result = "9999+";
        }else{
            result= string.valueof(shownumredis);
        }
        return result;
    }
}

分析

从代码看的出来，不同条件下，执行的逻辑是不同的，可以把这种执行逻辑抽象出来，用多态的概念来定义不同的执行方式。

/**
 * 工厂模式
 * 从代码看的出来，不同的条件下，执行的逻辑是不同的，那么可以把这种执行逻辑抽象出来
 * 用多态的概念来定义不同的执行方式
 *
 * @author sunyang
 * @date 2019/1/30 10:51
 */
public abstract class abstractbizuser2 {

    /**
     * 处理展示
     * @param shownumredis 展示数量
     * @return
     */
    public abstract string process(long shownumredis);

}

/**
 * @author sunyang
 * @date 2019/1/30 10:57
 */
public class showoneexecutor extends abstractbizuser2{

    @override
    public string process(long shownumredis) {
        string result;
        string code = string.valueof(shownumredis);
        string first = code.substring(0, 1);
        result = first + "0+";
        return result;
    }
}

/**
 * @author sunyang
 * @date 2019/1/30 11:07
 */
public class showtwoexecutor extends abstractbizuser2 {
    @override
    public string process(long shownumredis) {
        string result;
        string code = string.valueof(shownumredis);
        string first = code.substring(0, 1);
        result = first + "00+";
        return result;
    }
}

/**
 * @author sunyang
 * @date 2019/1/30 11:09
 */
public class showthreeexecutor extends abstractbizuser2 {
    @override
    public string process(long shownumredis) {
        string result;
        string code = string.valueof(shownumredis);
        string first = code.substring(0, 1);
        result = first + "000+";
        return result;
    }
}

/**
 * @author sunyang
 * @date 2019/1/30 11:09
 */
public class showfourexecutor extends abstractbizuser2 {
    @override
    public string process(long shownumredis) {
        string result;
        result = "9999+";
        return result;
    }
}

/**
 * @author sunyang
 * @date 2019/1/30 11:10
 */
public class showotherexecutor extends abstractbizuser2 {
    @override
    public string process(long shownumredis) {
        string result;
        result= string.valueof(shownumredis);
        return result;
    }
}

/**
 * 定义一个工厂来把需要处理逻辑给包起来
 *
 * @author sunyang
 * @date 2019/1/30 11:21
 */
public class executorfactory {

    public abstractbizuser2 getexecutor(long shownumredis){
        if (shownumredis >= 10 && shownumredis <= 99){
            return new showoneexecutor();
        }else if (shownumredis >= 100 && shownumredis <=999){
            return new showtwoexecutor();
        }else if (shownumredis >= 1000 && shownumredis <=9999){
            return new showthreeexecutor();
        }else if (shownumredis > 9999){
            return new showfourexecutor();
        }else{
            return new showotherexecutor();
        }
    }
}

结论

/**
 * @author sunyang
 * @date 2019/1/30 10:32
 */
public class bizuser {

    public string getshowmorenum(long shownumredis) {
        /*string  result= string.valueof(shownumredis);
        if (shownumredis >= 10 && shownumredis <= 99){
            string code = string.valueof(shownumredis);
            string first = code.substring(0, 1);
            result = first + "0+";
        }else if (shownumredis >= 100 && shownumredis <=999){
            string code = string.valueof(shownumredis);
            string first = code.substring(0, 1);
            result = first + "00+";
        }else if (shownumredis >= 1000 && shownumredis <=9999){
            string code = string.valueof(shownumredis);
            string first = code.substring(0, 1);
            result = first + "000+";
        }else if (shownumredis > 9999){
            result = "9999+";
        }else{
            result= string.valueof(shownumredis);
        }
        return result;*/
        executorfactory executorfactory = new executorfactory();
        abstractbizuser2 bizuser2 = executorfactory.getexecutor(shownumredis);
        return bizuser2.process(shownumredis);
    }
}

/**
 * @author sunyang
 * @date 2019/1/30 12:32
 */
public class bizuserdemo {

    public static void main(string[] args) {
        long shownum = 1111;
        bizuser bizuser = new bizuser();
        string result = bizuser.getshowmorenum(shownum);
        system.out.println("工厂模式实战后的结果 result：" + result);
    }
}

 

题外话

实战中的代码是简单可公开的逻辑代码

举一反三，去改造看不下去的代码