替换字符串中的空格和空行

总：a.直接用String.replaceAll();替换的话，会连字符串里的n,r,t等字母一起替换掉

 

       b.所以要用正则表达式Pattern和Matcher类替换

 

 

代码如下：

 

Class clazz = StdFeatureInfoMapper.class;

String sfi_filter = SqlUtil.sqlFromMybatis(sessionFactory, dataSource, clazz, "getGeoserverSqlSfi", record);

log.info("===去除空格和空行之前getSfiSql==="+sfi_filter);

 

Matcher m = Pattern.compile("(?m)^\\s*$(\\n|\\r\\n)").matcher(sfi_filter);

String sfi_filter_new = m.replaceAll("   ");

log.info("===去除空格和空行之后getSfiSql2==="+sfi_filter_new);