Java解析SQL，替换SQL中的##

替换SQL中# #，并填充值，例：

select * from aa where bb= #bb# and cc= #cc#  and dd = #dd# order by ee desc
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将sql语句中的##替换为数组[1,2,3]中真实值，变为一条可执行SQL

private static String convertString(String sql ,String[] arr){
        StringBuilder sb = new StringBuilder();
        int count =0 ;
        boolean firstFlag =false ;
        for (char c : sql.toCharArray()) {
            if (c == '#'  ){
                if (firstFlag){
                    if (count<arr.length){
                        sb.append(arr[count]);
                        count++;
                    }
                }
                firstFlag = !firstFlag ;

            } else if (!firstFlag) {
                sb.append(c);
            }
        }
        return   null == sb ? "" : sb.toString();
    }
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public class Test1 {
    public static void main(String[] args) throws MagicParseException, MagicException, MagicMatchNotFoundException {
        String sql = "select * from aa where bb= #bb# and cc= #cc#  and dd = #dd# order by ee desc";
        String[] arr={"1","2","3"};
        sql = convertString(sql,arr);
        System.out.println(sql)
		}
    }
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输出结果为

select * from aa where bb= 1 and cc= 2  and dd = 3 order by ee desc
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