解决Spring国际化文案占位符失效问题的方法

 // Indices for segments  private static final int SEG_RAW   = 0;  private static final int SEG_INDEX  = 1;  private static final int SEG_TYPE   = 2;  private static final int SEG_MODIFIER = 3; // modifier or subformat/**   * Sets the pattern used by this message format.   * The method parses the pattern and creates a list of subformats   * for the format elements contained in it.   * Patterns and their interpretation are specified in the   * <a href="#patterns" rel="external nofollow" >class description</a>.   *   * @param pattern the pattern for this message format   * @exception IllegalArgumentException if the pattern is invalid   */  @SuppressWarnings("fallthrough") // fallthrough in switch is expected, suppress it  public void applyPattern(String pattern) {      StringBuilder[] segments = new StringBuilder[4];      // Allocate only segments[SEG_RAW] here. The rest are      // allocated on demand.      segments[SEG_RAW] = new StringBuilder();      int part = SEG_RAW;      int formatNumber = 0;      boolean inQuote = false;      int braceStack = 0;      maxOffset = -1;      for (int i = 0; i < pattern.length(); ++i) {        char ch = pattern.charAt(i);        if (part == SEG_RAW) {          if (ch == '/'') {            if (i + 1 < pattern.length()              && pattern.charAt(i+1) == '/'') {              segments[part].append(ch); // handle doubles              ++i;            } else {              inQuote = !inQuote;            }          } else if (ch == '{' && !inQuote) {            part = SEG_INDEX;            if (segments[SEG_INDEX] == null) {              segments[SEG_INDEX] = new StringBuilder();            }          } else {            segments[part].append(ch);          }        } else {          if (inQuote) {       // just copy quotes in parts            segments[part].append(ch);            if (ch == '/'') {              inQuote = false;            }          } else {            switch (ch) {            case ',':              if (part < SEG_MODIFIER) {                if (segments[++part] == null) {                  segments[part] = new StringBuilder();                }              } else {                segments[part].append(ch);              }              break;            case '{':              ++braceStack;              segments[part].append(ch);              break;            case '}':              if (braceStack == 0) {                part = SEG_RAW;                makeFormat(i, formatNumber, segments);                formatNumber++;                // throw away other segments                segments[SEG_INDEX] = null;                segments[SEG_TYPE] = null;                segments[SEG_MODIFIER] = null;              } else {                --braceStack;                segments[part].append(ch);              }              break;            case ' ':              // Skip any leading space chars for SEG_TYPE.              if (part != SEG_TYPE || segments[SEG_TYPE].length() > 0) {                segments[part].append(ch);              }              break;            case '/'':              inQuote = true;              // fall through, so we keep quotes in other parts            default:              segments[part].append(ch);              break;            }          }        }      }      if (braceStack == 0 && part != 0) {        maxOffset = -1;        throw new IllegalArgumentException("Unmatched braces in the pattern.");      }      this.pattern = segments[0].toString();  }