对Properties文件的增删改查操作工具类

对Properties文件的增删改查操作工具类，保留以备后用。

package org.svn.test;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
public class PropertiesHandle {

//根据key读取value
public static String readValue(String filePath,String key) {
Properties props = new Properties();
try {
InputStream in = new BufferedInputStream(new FileInputStream(filePath));
props.load(in);
String value = props.getProperty (key);
System.out.println(key+":"+value);
return value;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
//根据Key移除value
public static boolean removeValue(String filePath,String key) {
Properties props = new Properties();
try {
InputStream in = new BufferedInputStream(new FileInputStream(filePath));
props.load(in);
OutputStream fos = new FileOutputStream(filePath);
props.remove(key);
props.store(fos, "Delete '" + key + "' value");
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}

//读取properties的全部信息
@SuppressWarnings("unchecked")
public static List<String> readProperties(String filePath) {
List<String> svnList=new ArrayList<String>();
Properties props = new Properties();
try {
InputStream in = new BufferedInputStream (new FileInputStream(filePath));
props.load(in);
Enumeration en = props.propertyNames();
while (en.hasMoreElements()) {
String key = (String) en.nextElement();
if (key.contains("_")&&!key.contains("DAS")) {
svnList.add(key);
}

//String Property = props.getProperty (key);
//System.out.println(key+":"+Property);
}

} catch (Exception e) {

e.printStackTrace();
}
return svnList;
}
/***
*
* @param filePath
* @return 二维数组
* 读取所有服务svn的键值对
*/
public static String[][] readAllProperties(String filePath) {
Map<String,String> map = new HashMap<String, String>();
String[][] ss=null;
Properties props = new Properties();
try {
InputStream in = new BufferedInputStream (new FileInputStream(filePath));
props.load(in);
Enumeration en = props.propertyNames();
while (en.hasMoreElements()) {
String key = (String) en.nextElement();    //key
String Property = props.getProperty (key); //value
map.put(key, Property);
}
if (null!=map) {
Set<String> set = map.keySet();
Iterator<String> it = set.iterator();
ss = new String[map.size()][2];
for (int i = 0; i < map.size(); i++) {
ss[i][0] = it.next();
ss[i][1] = map.get(ss[i][0]);
}
for (int i = 0; i < ss.length; i++) {
for (int j = 0; j < ss[i].length; j++) {
System.out.println(ss[i][j]+"\t");
}
}
}

} catch (Exception e) {

e.printStackTrace();
}
return ss;
}

//写入properties信息
public static void writeProperties(String filePath,String parameterName,String parameterValue) {
Properties prop = new Properties();
try {
InputStream fis = new FileInputStream(filePath);
//从输入流中读取属性列表（键和元素对）
prop.load(fis);
//调用 Hashtable 的方法 put。使用 getProperty 方法提供并行性。
//强制要求为属性的键和值使用字符串。返回值是 Hashtable 调用 put 的结果。
OutputStream fos = new FileOutputStream(filePath);
prop.setProperty(parameterName, parameterValue);
//以适合使用 load 方法加载到 Properties 表中的格式，
//将此 Properties 表中的属性列表（键和元素对）写入输出流
prop.store(fos, "Update '" + parameterName + "' value");
} catch (IOException e) {
System.err.println("Visit "+filePath+" for updating "+parameterName+" value error");
}
}

}