package com.ydl.ydlnet.utils; /** * Created by haorui on 2019-09-02 . * Des: 格式化后的json串 */ public class JsonUtil { /** * 格式化json字符串 * * @param jsonStr 需要格式化的json串 * @return string */ public static String formatJson(String jsonStr) { if (null == jsonStr || "".equals(jsonStr)) return ""; StringBuffer sb = new StringBuffer(); char last = '\0'; char current = '\0'; int indent = 0; for (int i = 0; i < jsonStr.length(); i++) { last = current; current = jsonStr.charAt(i); //遇到{ [换行,且下一行缩进 switch (current) { case '{': case '[': sb.append(current); sb.append('\n'); indent++; addIndentBlank(sb, indent); break; //遇到} ]换行,当前行缩进 case '}': case ']': sb.append('\n'); indent--; addIndentBlank(sb, indent); sb.append(current); break; //遇到,换行 case ',': sb.append(current); if (last != '\\') { sb.append('\n'); addIndentBlank(sb, indent); } break; default: sb.append(current); } } return sb.toString(); } /** * 添加space * * @param sb * @param indent */ private static void addIndentBlank(StringBuffer sb, int indent) { for (int i = 0; i < indent; i++) { sb.append('\t'); } } /** * http 请求数据返回 json 中中文字符为 unicode 编码转汉字转码 * * @param theString * @return 转化后的结果. */ public static String decodeUnicode(String theString) { char aChar; int len = theString.length(); StringBuffer outBuffer = new StringBuffer(len); for (int x = 0; x < len; ) { aChar = theString.charAt(x++); if (aChar == '\\') { aChar = theString.charAt(x++); if (aChar == 'u') { int value = 0; for (int i = 0; i < 4; i++) { aChar = theString.charAt(x++); switch (aChar) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': value = (value << 4) + aChar - '0'; break; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': value = (value << 4) + 10 + aChar - 'a'; break; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': value = (value << 4) + 10 + aChar - 'A'; break; default: throw new IllegalArgumentException( "Malformed \\uxxxx encoding."); } } outBuffer.append((char) value); } else { if (aChar == 't') aChar = '\t'; else if (aChar == 'r') aChar = '\r'; else if (aChar == 'n') aChar = '\n'; else if (aChar == 'f') aChar = '\f'; outBuffer.append(aChar); } } else outBuffer.append(aChar); } return outBuffer.toString(); } }