cc.jinglupeng.wechat.util.MapUtil Maven / Gradle / Ivy
package cc.jinglupeng.wechat.util;
import java.beans.PropertyDescriptor;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
/**
* @author jinglupeng.cc
*/
public class MapUtil {
/**
* 根据key对map进行排序
*
* @param map
* @return
*/
public static LinkedHashMap sort(Map map) {
LinkedHashMap tempMap = new LinkedHashMap();
List> infoIds = new ArrayList>(
map.entrySet());
Collections.sort(infoIds, new Comparator>() {
public int compare(Map.Entry o1,
Map.Entry o2) {
return (o1.getKey()).toString().compareTo(o2.getKey());
}
});
for (int i = 0; i < infoIds.size(); i++) {
Map.Entry item = infoIds.get(i);
tempMap.put(item.getKey(), item.getValue());
}
return tempMap;
}
/**
* 将简单bean 转换成为map
*
* @param bean
* @return
*/
public static Map fromBean(Object bean) {
Map map = new HashMap();
Class clazz = bean.getClass();
Field[] fields = clazz.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
try {
String fieldName = fields[i].getName();
PropertyDescriptor pd = new PropertyDescriptor(fieldName, clazz);
if (pd.getReadMethod() != null) {
Method readMethod = pd.getReadMethod();
if (!Modifier.isPublic(readMethod.getDeclaringClass()
.getModifiers())) {
readMethod.setAccessible(true);
}
Object value = readMethod.invoke(bean);
if (value == null) {
continue;
}
map.put(fieldName, value.toString());
}
} catch (Exception e) {
// TODO 当某个属性不合法时，直接忽略
}
}
return map;
}
/**
* key-value拼接为queryString
*
* @param map
* @param keyLower
* @param valueUrlencode
* @return
*/
public static String join(Map map) {
StringBuffer sb = new StringBuffer();
for (String key : map.keySet()) {
String value = map.get(key);
if (value == null || "".equals(value)) {
continue;
}
sb.append(key).append("=").append(value).append("&");
}
if (sb.length() > 0) {
sb.deleteCharAt(sb.length() - 1);
}
return sb.toString();
}
/**
* key-value拼接为queryString
*
* @param map
* @param keyLower
* @param valueUrlencode
* @return
*/
public static String join(Map map, boolean urlencode) {
StringBuffer sb = new StringBuffer();
for (String key : map.keySet()) {
String value = map.get(key);
if (value == null || "".equals(value)) {
continue;
}
try {
value = (urlencode ? URLEncoder.encode(value, "UTF-8") : value);
sb.append(key).append("=").append(value).append("&");
} catch (UnsupportedEncodingException e) {
}
}
if (sb.length() > 0) {
sb.deleteCharAt(sb.length() - 1);
}
return sb.toString();
}
/**
* 简单 xml 转换为 Map
*
* @param reader
* @return
* @throws DocumentException
*/
public static Map fromXml(String xml) {
Map map = new HashMap();
try {
Document document = DocumentHelper.parseText(xml);
Element root = document.getRootElement();
@SuppressWarnings("unchecked")
List elements = root.elements();
for (Element element : elements) {
map.put(element.getName(), element.getText());
}
} catch (DocumentException e) {
e.printStackTrace();
}
return map;
}
}