UuidUtil.java

package com.mfh.comn.utils;

import java.util.UUID;

/**
 * uuid工具类
 * 
 * @author zhangyz created on 2012-4-15
 * @since Framework 1.0
 */
public class UuidUtil {   
    public static String LOCAL_ID = "";
    
    /**
     * 是否属于本地产生的guid
     * @param id
     * @param localIdPre
     * @return
     * @author zhangyz created on 2012-10-13
     */
    public static boolean isLocalGenId(String id, String localIdPre){
        if (id.length() == 36 && id.startsWith(localIdPre))//注意是36位长度
            return true;
        else
            return false;
    }
    
    /**
     * 获取32位uuid
     * @return
     * @author zhangyz created on 2013-8-27
     */
    public static String getSimpleUuid32(){
        String s = UUID.randomUUID().toString();
        StringBuilder builder = new StringBuilder();            
        //去掉“-”符号 ,并且添加前缀
        return builder.append(s.substring(0,8))
                .append(s.substring(9,13))
                .append(s.substring(14,18))
                .append(s.substring(19,23))
                .append(s.substring(24))
                .toString();
    }
    
    /**
     * 获取唯一字符串码
     * @return
     * @author zhangyz created on 2012-8-13
     */
    public static String getUuid(){
        if (LOCAL_ID.length() == 0){
            return UUID.randomUUID().toString();
        }
        else{
            String s = UUID.randomUUID().toString();
            StringBuilder builder = new StringBuilder(LOCAL_ID);
            //去掉“-”符号 ,并且添加前缀
            return builder.append(s.substring(0,8))
                    .append(s.substring(9,13))
                    .append(s.substring(14,18))
                    .append(s.substring(19,23))
                    .append(s.substring(24))
                    .toString();
        }
    }
}