package com.tygy.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Set;
public class ReadProperties {
/**
* 文件路径
*/
private static String filePath = "resources/clounm.properties";
/**
* 获取properties文件中的内容,并返回map
*
* @return
*/
public static Map getProperties() {
Map map = new HashMap();
InputStream in = null;
Properties p = new Properties();;
try {
in = new BufferedInputStream(new FileInputStream(new File(filePath)));
p.load(in);
} catch (Exception e) {
e.printStackTrace();
}
Set> entrySet = p.entrySet();
for (Entry entry : entrySet) {
map.put((String) entry.getKey(), (String) entry.getValue());
}
return map;
}
}

JAVA实现map集合转成XML格式
例如：
代码块
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import cn.sdk.util.StringUtil;
public class XmlUtil {
private static final String PREFIX_XML = "";
private static final String SUFFIX_XML = "";
private static final String PREFIX_CDATA = "
private static final String SUFFIX_CDATA = "]]>";
/**
* 转化成xml, 单层无嵌套
* @param map
* @param isAddCDATA
* @return
*/
public static String mapToXml(Map parm, boolean isAddCDATA) {
StringBuffer strbuff = new StringBuffer(PREFIX_XML);
if (null != parm) {
for (Entry entry : parm.entrySet()) {
strbuff.append("");
if (isAddCDATA) {
strbuff.append(PREFIX_CDATA);
if (null != entry.getValue()) {
strbuff.append(entry.getValue());
}
strbuff.append(SUFFIX_CDATA);
} else {
if (null != entry.getValue()) {
strbuff.append(entry.getValue());
}
}
strbuff.append("").append(entry.getKey()).append(">");
}
}
return strbuff.append(SUFFIX_XML).toString();
}
/**
* @description 将xml字符串转换成map
* @param xml
* @return Map
*/
public static Map xml2Map(String xml) {
Map map = new HashMap();
Document doc = null;
try {
doc = DocumentHelper.parseText(xml); // 将字符串转为XML
Element rootElt = doc.getRootElement(); // 获取根节点
@SuppressWarnings("unchecked")
List list = rootElt.elements();// 获取根节点下所有节点
for (Element element : list) { // 遍历节点
map.put(element.getName(), element.getText()); // 节点的name为map的key，text为map的value
}
} catch (DocumentException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return map;
}
}

package com.tygy.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Set;
public class ReadProperties {
/**
* 文件路径
*/
private static String filePath = "resources/clounm.properties";
/**
* 获取properties文件中的内容,并返回map
*
* @return
*/
public static Map getProperties() {
Map map = new HashMap();
InputStream in = null;
Properties p = new Properties();;
try {
in = new BufferedInputStream(new FileInputStream(new File(filePath)));
p.load(in);
} catch (Exception e) {
e.printStackTrace();
}
Set> entrySet = p.entrySet();
for (Entry entry : entrySet) {
map.put((String) entry.getKey(), (String) entry.getValue());
}
return map;
}
}
配置文件
clounm.properties
## 需要执行的SQL语句
sql= select * from  table## 字段对应关系clounm= id,name## type
type= type
properties文件默认编码集为iso8859-1，设置为utf-8才可以使用中文注释

从技术上讲，您的build方法可能看起来像这样：
private JsonNode build(Map> entitiesPlaylist) {
ArrayNode root = objectMapper.createArrayNode();
for (Map.Entry> entry: entitiesPlaylist.entrySet()) {
JsonNode entityPlayListUrlsJsonObject = objectMapper.valueToTree(entry);
root.add(objectMapper.valueToTree(entityPlayListUrlsJsonObject));
}
return root;
}
在这种情况下，添加到root ArrayNode的每个JsonNode都将Entity#toString作为键。  因此，重写和自定义Entity (子)类的toString方法是一个好主意，否则您将获得作为每个JSON对象的键。
因此，使用Entity的未自定义toString方法，您的JSON响应将类似于：
[
{
"com.package.to.Entity@51931956": [
{
// First PlayListUrl object properties of this Entity
},
{
// Second PlayListUrl object properties of this Entity
},
...
]
},
{
"com.package.to.Entity@84569301": [
{
// First PlayListUrl object properties of this Entity
},
{
// Second PlayListUrl object properties of this Entity
}
...
]
},
...
]
希望对您有帮助，如果我迟到，也可以对其他人有帮助。