codegeneratorserviceimpl.java

本源码为教学管理信息系统

package com.wygl.dmwh.service;

import com.wygl.service.AbstractService;

/**
 * @author Administrator
 * 代码生成服务实现
 */
public class CodeGeneratorServiceImpl extends AbstractService implements
		CodeGeneratorService {

	public String generator(CodeParams codeParams) throws Exception {
		//1.根据当前层次levels和层次规则layerRule找出截取字符串,和当前层次位数
		int levels = Integer.parseInt(codeParams.getLevels());
		int curLayer = Integer.parseInt(codeParams.getLayerRule().substring(levels-1,levels));
		String hqlString = "";		
		if(codeParams.getIsDept().equals("0")){
			hqlString = "select max(codeTableEdit.code) from CodeTableEdit as codeTableEdit where codeTableEdit.codeType='"+codeParams.getCodeType()+"' and codeTableEdit.fatherCode = '"+codeParams.getFatherCode()+"' and codeTableEdit.dept_id='"+codeParams.getDept_id()+"'";
		}else{
			hqlString = "select max(codeTableEdit.code) from CodeTableEdit as codeTableEdit where codeTableEdit.codeType='"+codeParams.getCodeType()+"' and codeTableEdit.fatherCode = '"+codeParams.getFatherCode()+"'";
		}
		//2.找出当前最大号	
		String maxCode = (String)dbDao.queryObjects(hqlString).get(0);
		if(maxCode==null) maxCode = "0";
		//2.去掉前缀字符
		String code = "";
		String curCode = "";
		if(maxCode.equals("0")){
			code = "0";
			curCode = "0";		
		}else{
			if(codeParams.getPrefix().equals("")){
				code = maxCode.substring(0);
			}else{
				code = maxCode.substring(codeParams.getPrefix().length()-1);
			}
			curCode = code.substring(code.length()-curLayer);	
		}
		//4.转换字符串为整形,并进行加1
		String maxInt = "1";
		if(curLayer==1){
			if(curCode.equals("9")){
				curCode = "a";
			}else{
				curCode = ""+(char)((int)(curCode.charAt(0)) + 1);
			}
			if(curCode.equals("z")) throw new Exception("超过最大限z!");
		}else{
			String suffix = "";
			for(int i = 0;i<curLayer;i++){
				suffix += "0";
			}
			maxInt += suffix;
			curCode = Integer.toString(Integer.valueOf(curCode).intValue() + 1);
			if(Integer.parseInt(maxInt) <= Integer.parseInt(curCode))  throw new Exception("超过最大限"+maxInt+"!");
			int length = curCode.length();
			String prefix = "";
			for(int i = 0;i<curLayer - length;i++){
				prefix += "0";
			}
			curCode = prefix + curCode;
		}	
		curCode = codeParams.getFatherCode().substring(codeParams.getCodeType().length()) + curCode;
		return curCode;
	}
	
}