Java字符串格式化,{}占位符根据名字替换实例

import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StringFormatUtil {

  private static final Pattern pattern = Pattern.compile("\\{(.*?)\\}");
  private static Matcher matcher;

  /**
   * 格式化字符串 字符串中使用{key}表示占位符
   *
   * @param sourStr
   *      需要匹配的字符串
   * @param param
   *  <i>本文来源gaodai$ma#com搞$代*码网2</i>    参数集
   * @return
   */
  public static String stringFormat(String sourStr, Map<String, Object> param) {
    String tagerStr = sourStr;
    if (param == null)
      return tagerStr;
    try {
      matcher = pattern.matcher(tagerStr);
      while (matcher.find()) {
        String key = matcher.group();
        String keyclone = key.substring(1, key.length() - 1).trim();
        Object value = param.get(keyclone);
        if (value != null)
          tagerStr = tagerStr.replace(key, value.toString());
      }
    }catch (Exception e){
      return null;
    }
    return tagerStr;
  }

  /**
   * 格式化字符串 字符串中使用{key}表示占位符 利用反射 自动获取对象属性值 (必须有get方法)
   *
   * @param sourStr 需要匹配的字符串
   *
   * @return
   */
  public static String stringFormat(String sourStr, Object obj) {
    String tagerStr = sourStr;
    matcher = pattern.matcher(tagerStr);
    if (obj == null)
      return tagerStr;

    PropertyDescriptor pd;
    Method getMethod;
    // 匹配{}中间的内容 包括括号
    while (matcher.find()) {
      String key = matcher.group();
      String keyclone = key.substring(1, key.length() - 1).trim();
      try {
        pd = new PropertyDescriptor(keyclone, obj.getClass());
        getMethod = pd.getReadMethod();// 获得get方法
        Object value = getMethod.invoke(obj);
        if (value != null)
          tagerStr = tagerStr.replace(key, value.toString());
      } catch (Exception e) {
        // TODO Auto-generated catch block
        // Loggers.addException(e);
      }
    }
    return tagerStr;
  }

  /**
   * 格式化字符串 (替换所有) 字符串中使用{key}表示占位符
   *
   * @param sourStr
   *      需要匹配的字符串
   * @param param
   *      参数集
   * @return
   */
  public static String stringFormatAll(String sourStr, Map<String, Object> param) {
    String tagerStr = sourStr;
    if (param == null)
      return tagerStr;
    try {
      matcher = pattern.matcher(tagerStr);
      while (matcher.find()) {
        String key = matcher.group();
        String keyclone = key.substring(1, key.length() - 1).trim();
        Object value = param.get(keyclone);
        if (value != null)
          tagerStr = tagerStr.replace(key, value.toString());
      }
    }catch (Exception e){
      return null;
    }
    return tagerStr;
  }

  /**
   * 格式花字符串，按照占位符名字
   * 输入：sourStr = xxxxx{a}xxxx{b} ,param = {a:A,b:B}
   * 输出：targetStr = xxxxAxxxxB
   * @param sourStr
   * @param param
   * @return
   */
  public static String stringFormat(String sourStr, JSONObject param) {
    String tagerStr = sourStr;
    if (param == null)
      return tagerStr;
    try {
      matcher = pattern.matcher(tagerStr);
      while (matcher.find()) {
        String key = matcher.group();
        String keyclone = key.substring(1, key.length() - 1).trim();
        Object value = param.get(keyclone);
        if (value != null)
          tagerStr = tagerStr.replace(key, value.toString());
      }
    }catch (Exception e){
      return null;
    }
    return tagerStr;
  }

  public static void main(String[] args) {
//    Map<String,Object> map = new HashMap<>();
//    map.put("id","111");
//    map.put("sss","ss");
//    JSONObject json = new JSONObject();
//    json.put("id","212");
//    json.put("fff","xxxx");
//    json.put("emmmmm",11);
//    stringFormat("sisas&{fff}_diwahwi%{id}{jio}",json);
  }
}