java--大量switch-case代码加入枚举类型进行优化

    当项目存在大量的switch-case条件判断时，会把让整个项目看起来非常low，以下tich提出一种优化方法，可提高代码的维护性，让代码变得更加简洁，易维护。

先看原代码：

                String jrnDDZName = null;
	        String trsDDzName = null;
	        String wkeCodName = null;
	        
	        switch (fileName)
	        {
	        case "FMCHKRULP":
	            jrnDDZName = "BFMSYNRUX1";
	            trsDDzName = "BFMSYNRUX2";
	            wkeCodName = "BFMSYNRU";
	            break;
	            
	        case "FMCHKRALP":
	            jrnDDZName = "BFMSYNRAX1";
	            trsDDzName = "BFMSYNRAX2";
	            wkeCodName = "BFMSYNRA";
	            break;

	        case "FMBACDTAP":
	            jrnDDZName = "BFMSYNBCX1";
	            trsDDzName = "BFMSYNBCX2";
	            wkeCodName = "BFMSYNBC";
	            break;
	           
	        case "FMLECDTAP":
	            jrnDDZName = "BFMSYNLCX1";
	            trsDDzName = "BFMSYNLCX2";
	            wkeCodName = "BFMSYNLC";
	            break;
	            
	        case "FMLERDEFP":
	            jrnDDZName = "BFMSYNLRX1";
	            trsDDzName = "BFMSYNLRX2";
	            wkeCodName = "BFMSYNLR";
	            break;
	            
	        //pgwyx 20180419
	        case "FMNTFDTAP":
	            jrnDDZName = "BFMSYNNFX1";
	            trsDDzName = "BFMSYNNFX2";
	            wkeCodName = "BFMSYNNF";
	            break;
	            
	        case "FMCHKTMLP":
	            jrnDDZName = "BFMSYNTMX1";
	            trsDDzName = "BFMSYNTMX2";
	            wkeCodName = "BFMSYNTM";
	            break;
      
	        default:
	            break;
	        }

使用枚举：

public enum FileName {
	FMCHKRULP("BFMSYNRUX1","BFMSYNRUX2","BFMSYNRU"),
	FMCHKRALP("BFMSYNRUX2","BFMSYNRAX2","BFMSYNRA"),
	FMBACDTAP("BFMSYNBCX1","BFMSYNBCX2","BFMSYNBC"),
	FMLECDTAP("BFMSYNLCX1","BFMSYNLCX2","BFMSYNLC"),
	FMLERDEFP("BFMSYNLRX1","BFMSYNLRX2","BFMSYNLR"),
	FMNTFDTAP("BFMSYNNFX1","BFMSYNNFX2","BFMSYNNF"),
	FMCHKTMLP("BFMSYNTMX1","BFMSYNTMX2","BFMSYNTM");
	
	private String jrnDDZName;
	private String trsDDzName;
	private String wkeCodName;

	FileName(String jrnDDZName, String trsDDzName, String wkeCodName) {
		this.jrnDDZName = jrnDDZName;
		this.trsDDzName = trsDDzName;
		this.wkeCodName = wkeCodName;
	}

	public String jrnDDZName() {
		return jrnDDZName;
	}
	
	public String trsDDzName() {
		return trsDDzName;
	}
	
	public String wkeCodName() {
		return wkeCodName;
	}
	

}

简化后代码：

		FileName valueOf = Enum.valueOf(FileName.class, fileName);
		jrnDDZName = valueOf.jrnDDZName();
		trsDDzName = valueOf.trsDDzName();
		wkeCodName = valueOf.wkeCodName();

大大简化了代码量，也看起来更加简洁，更容易维护。