首页 > 代码库 > [1]字符串按中文符占3位进行指定长度剪切[2]Double类型截取指定长度(指定长度=整数位+小数位)
[1]字符串按中文符占3位进行指定长度剪切[2]Double类型截取指定长度(指定长度=整数位+小数位)
1 /** 将中文字符串剪切为在当前db2(编码GBK)中所占用的长度*/ 2 public String cutStringForDb2(String src,Integer size) { 3 int len = src.length(); 4 int res_len = 0; 5 StringBuilder res_b = new StringBuilder(); 6 for (int i = 0 ; i < len; i++) { 7 if (isChinese(src.charAt(i))) { 8 res_len+=3; 9 } else {10 res_len+=1;11 }12 if (res_len>size) {13 break;14 } else {15 res_b.append(src.charAt(i));16 }17 }18 return res_b.toString();19 }20 21 public boolean isChinese(char c) {22 Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);23 if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS24 || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B25 || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS26 || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {27 return true;28 }29 return false;30 }31 32 public Double cutDouble(String src,Integer intValue,Integer pointValue) {33 if (src.length() > intValue) {34 if (src.matches("[0-9]*\\.[0-9]*")) {35 String[] strs = src.split("\\.");36 StringBuilder res = new StringBuilder().append(strs[0].length()>intValue?37 strs[0].substring(0, intValue):strs[0]);38 res.append(strs[1].length()>pointValue?strs[1].substring(0, pointValue):strs[1]);39 return Double.parseDouble(res.toString());40 } else if (src.matches("[0-9]*")){41 return Double.parseDouble(src.substring(0, intValue));42 } else {43 return 0.0D;44 }45 } else {46 return Double.parseDouble(src);47 }48 }
[1]字符串按中文符占3位进行指定长度剪切[2]Double类型截取指定长度(指定长度=整数位+小数位)
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