1. 应用场景场景描述:
项目重构,要匹配交易类型处理数据.交易类型的字段类型为String,最初是在switch中直接使用String类型匹配.
为了提升代码的可靠性与重用性,这里将String类型换成枚举类.每次传进来的String,首先处理成枚举类进行匹配.
2. 源码如下:
public enum TransactionType { P_1000("1000"), P_1001("1001"), P_1002("1002"), P_1003("1003"), P_1004("1004"); private String transactionType; private TransactionType(String transactionType){ this.transactionType = transactionType; } public String getTransactionType() { return transactionType; } public void setTransactionType(String transactionType) { this.transactionType = transactionType; } //用于switch中,将String转化为枚举类 public static TransactionType getByType(String type){ for (TransactionType transactionType:values()) { if (transactionType.getTransactionType().equals(type)) { return transactionType; } } return null; } //测试代码 public static void main(String[] args) { switch (TransactionType.getByType("1000")) { case P_1000: System.out.println("------ok啦----"); break; case P_1001: System.out.println("------哭啦----"); break; default: System.out.println("------摔啦----"); break; } } }
