获取e.printStackTrace全部信息（主键冲突提醒）

try{

//执行操作

} catch (Exception e) {	
//			e.printStackTrace();
			
			Writer writer = new StringWriter();
            e.printStackTrace(new PrintWriter(writer));  
			String errLog = writer.toString();

//            System.out.println("打印错误:"+errLog); 
            if(errLog.indexOf("key 'PRIMARY")>=0){
            	System.out.println("-------------");
            	System.out.println("存在主键冲突");
            	System.out.println("-------------");
            }
}