Map转String，String转Map的工具类

╰半夏微凉° 2022-06-10 14:14 216阅读 0赞

废话不多说，代码如下(直接传参调用，就OK了):

package com.*********;
    
    import java.lang.reflect.Field;
    import java.util.*;
    
    import org.apache.commons.lang.StringUtils;
    
    /** * Created ******** */
    public class MapUtils { 
    
        public static final String URL_MIDDLE_SEP_CHAR    = "<hi:=>";      // URL拼接时的K与V之间的间隔符
        public static final String URL_END_SEP_CHAR       = "<hi:$$>";     // URL拼接时的K-V与K-V的间隔符
        public static final String URL_END_SEP_CHAR_TRANS = "<hi:\\$\\$>"; // URL拼接时的K-V与K-V的间隔符
    
        /** * 使用 Map按key进行排序得到key=value的字符串 * @param map * @param eqaulsType K与V之间的拼接字符串 = 或者其他... * @param spliceType K-V与K-V之间的拼接字符串 & 或者|... * @return */
        public static String stringByKey(Map<String, String> map, String eqaulsType,
                                         String spliceType) {
            if (map == null || map.isEmpty()) {
                return null;
            }
            StringBuilder sb = new StringBuilder();
            for (Map.Entry<String, String> entry : map.entrySet()) {
                if (sb.length() == 0) {
                    sb.append(entry.getKey()).append(eqaulsType).append(entry.getValue());
                } else {
                    sb.append(spliceType).append(entry.getKey()).append(eqaulsType)
                        .append(entry.getValue());
                }
            }
    
            return sb.toString();
        }
    
        public static String stringByKeyObj(Map<String, Object> map, String eqaulsType,
                                         String spliceType) {
            if (map == null || map.isEmpty()) {
                return null;
            }
            StringBuilder sb = new StringBuilder();
            for (Map.Entry<String, Object> entry : map.entrySet()) {
                if (sb.length() == 0) {
                    sb.append(entry.getKey()).append(eqaulsType).append(entry.getValue());
                } else {
                    sb.append(spliceType).append(entry.getKey()).append(eqaulsType)
                            .append(entry.getValue());
                }
            }
    
            return sb.toString();
        }
    
        /** * 使用 Map按key进行排序得到key=value的字符串 * @param plain * @param eqaulsType K与V之间的拼接字符串 = 或者其他... * @param spliceType K-V与K-V之间的拼接字符串 & 或者|... * @return */
        public static Map<String, String> stringToMap(String plain, String eqaulsType,
                                                      String spliceType) {
            if (plain == null || plain.isEmpty()) {
                return null;
            }
    
            Map<String, String> map = new HashMap<>();
    
            String[] split = plain.split(spliceType);
            for (String kv : split) {
                if ("|".equals(kv)) {
                    continue;
                }
                String[] kvArr = kv.split(eqaulsType);
                if (kvArr.length == 2) {
                    map.put(kvArr[0], kvArr[1]);
                } else {
                    map.put(kvArr[0], "");
                }
            }
    
            return map;
        }
        /** * 使用 Map按key进行排序得到key=value的字符串 * @param map * @param spliceType 拼接字符串 & 或者|... * @return */
        public static String sortStringByKey(Map<String, Object> map, String spliceType) {
            if (map == null || map.isEmpty()) {
                return null;
            }
            Map<String, Object> sortMap = new TreeMap<String, Object>(new Comparator<String>() {
    
                @Override
                public int compare(String str1, String str2) {
                    return str1.compareTo(str2);
                }
            });
            sortMap.putAll(map);
    
            StringBuffer sb = new StringBuffer();
            for (Map.Entry<String, Object> entry : sortMap.entrySet()) {
                sb.append(entry.getKey());
                sb.append("=");
                sb.append(entry.getValue());
                sb.append(spliceType);
            }
    
            sb.deleteCharAt(sb.lastIndexOf(spliceType));
            return sb.toString();
        }
    
        /** * 使用 Map按key进行排序得到value拼接的字符串 * @param map * @param spliceType 拼接字符串 & 或者|... * @return */
        public static String sortStringByKeyGetValue(Map<String, Object> map, String spliceType) {
            if (map == null || map.isEmpty()) {
                return null;
            }
            Map<String, Object> sortMap = new TreeMap<String, Object>(new Comparator<String>() {
    
                @Override
                public int compare(String str1, String str2) {
                    return str1.compareTo(str2);
                }
            });
            sortMap.putAll(map);
    
            StringBuffer sb = new StringBuffer();
            for (Map.Entry<String, Object> entry : sortMap.entrySet()) {
                sb.append(entry.getValue());
                sb.append(spliceType);
            }
    
            sb.deleteCharAt(sb.lastIndexOf(spliceType));
            return sb.toString();
        }
    
        /** * 使用 Map按key进行排序 * @param map * @return */
        public static String sortStringByLine(Map<String, Object> map) {
            if (map == null || map.isEmpty()) {
                return null;
            }
            Map<String, Object> sortMap = new TreeMap<String, Object>(new Comparator<String>() {
    
                @Override
                public int compare(String str1, String str2) {
                    return str1.compareTo(str2);
                }
            });
            sortMap.putAll(map);
    
            StringBuffer sb = new StringBuffer();
            for (Map.Entry<String, Object> entry : sortMap.entrySet()) {
                sb.append(entry.getValue());
                sb.append("|");
            }
            return sb.toString();
        }
    
        /** * @Description: Map按key进行排序拼接value(无拼接符) * @param map * @return String */
        public static String sortStringByKeyGetValueNoSplice(Map<String, Object> map) {
            if (map == null || map.isEmpty()) {
                return null;
            }
            Map<String, Object> sortMap = new TreeMap<String, Object>(new Comparator<String>() {
                @Override
                public int compare(String str1, String str2) {
                    return str1.compareTo(str2);
                }
            });
            sortMap.putAll(map);
            StringBuffer sb = new StringBuffer();
            for (Map.Entry<String, Object> entry : sortMap.entrySet()) {
                sb.append(entry.getValue());
            }
            return sb.toString();
        }
    
        /** * 移除值为空的数据项 * @param map * @return */
        public static Map<String, String> removeNull(Map<String, String> map) {
    
            Map<String, String> resultMap = new HashMap<String, String>();
    
            for (Map.Entry<String, String> entry : map.entrySet()) {
                if (entry.getValue() != null && !"".equals(entry.getValue())) {
                    resultMap.put(entry.getKey(), entry.getValue());
                }
            }
            return resultMap;
        }
    
        /** * 移除值为空的数据项 * @param map * @return */
        public static Map<String, Object> removeNullObject(Map<String, Object> map) {
    
            Map<String, Object> resultMap = new HashMap<String, Object>();
    
            for (Map.Entry<String, Object> entry : map.entrySet()) {
                if (entry.getValue() != null
                    && StringUtils.isNotBlank(String.valueOf(entry.getValue()))) {
                    resultMap.put(entry.getKey(), entry.getValue());
                }
            }
            return resultMap;
        }
    
        /** * 实体类转为MAP * @return */
        public static Map<String, Object> getValueMap(Object obj) {
    
            Map<String, Object> map = new HashMap<String, Object>();
    
            // 获取f对象对应类中的所有属性域
            Field[] fields = obj.getClass().getDeclaredFields();
            for (int i = 0, len = fields.length; i < len; i++) {
                String varName = fields[i].getName();
                if (!(varName.equals("idPhoto") || varName.equals("sendSuccess"))) {
                    try {
                        // 获取原来的访问控制权限
                        boolean accessFlag = fields[i].isAccessible();
                        // 修改访问控制权限
                        fields[i].setAccessible(true);
                        // 获取在对象f中属性fields[i]对应的对象中的变量
                        Object o = fields[i].get(obj);
                        if (o != null)
                            map.put(varName, o.toString());
                        // 恢复访问控制权限
                        fields[i].setAccessible(accessFlag);
                    } catch (IllegalArgumentException ex) {
                        ex.printStackTrace();
                    } catch (IllegalAccessException ex) {
                        ex.printStackTrace();
                    }
                }
            }
            return map;
        }
    
        public static String createAutoFormHtml(String reqUrl, Map<String, String> hiddens,
                                                 String encoding) {
            StringBuffer sf = new StringBuffer();
            sf.append("<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset="
                      + encoding + "\"/></head><body>");
            sf.append("<form id = \"pay_form\" action=\"" + reqUrl + "\" method=\"post\">");
            if (null != hiddens && 0 != hiddens.size()) {
                Set<Map.Entry<String, String>> set = hiddens.entrySet();
                Iterator<Map.Entry<String, String>> it = set.iterator();
                while (it.hasNext()) {
                    Map.Entry<String, String> ey = it.next();
                    String key = ey.getKey();
                    String value = ey.getValue();
                    sf.append("<input type=\"hidden\" name=\"" + key + "\" id=\"" + key + "\" value=\""
                              + value + "\"/>");
                }
            }
            sf.append("</form>");
            sf.append("</body>");
            sf.append("<script type=\"text/javascript\">");
            sf.append("document.all.pay_form.submit();");
            sf.append("</script>");
            sf.append("</html>");
            return sf.toString();
        }
    }