package test.bwl;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
public class Test {
private static Properties properties = new Properties();
public static void main(String[] args) {
try {
InputStream is = Test.class.getClassLoader().getResourceAsStream("cache.properties");
properties.load(is);
String size = properties.getProperty("cache.size");
writeLog("配置成功！" + size);
} catch (FileNotFoundException e) {
writeLog("配置文件不存在！" + e.getMessage());
} catch (IOException e) {
writeLog("读取配置文件IO错误！" + e.getMessage());
}
}
public static void writeLog(String strLog) {
System.out.println(strLog);
}
}
package test.bwl;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
public class Test {
private static Properties properties = new Properties();
public static void main(String[] args) {
try {
InputStream is = Test.class.getClassLoader().getResourceAsStream("cache.properties");
properties.load(is);
String size = properties.getProperty("cache.size");
writeLog("配置成功！" + size);
} catch (FileNotFoundException e) {
writeLog("配置文件不存在！" + e.getMessage());
} catch (IOException e) {
writeLog("读取配置文件IO错误！" + e.getMessage());
}
}
public static void writeLog(String strLog) {
System.out.println(strLog);
}
}
package test.bwl;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.regex.Pattern;
/**
* 配置信息管理器
*
* @author bwl
* @version 1.0
*/
public class ConfigManager {
/**
* 提供单例对象的静态内部类
*/
private static class SingletonHolder {
public static ConfigManager instance = new ConfigManager();
}
/**
* 获取对象实例
* @return
*/
public static ConfigManager getInstance() {
return SingletonHolder.instance;
}
/**
* 存储问题列表的Map
*/
private Map<String, Properties> name2properties;
/**
* 构造方法，请使用getInstance()获取实例
*/
private ConfigManager() {
name2properties = Collections.synchronizedMap(new HashMap<String, Properties>());
doInit();
}
/**
* 初始化方法
*/
private void doInit() {
try {
File path = new File("./conf/");
if (!path.exists()) {
System.out.println("ConfilgManager Init Error: There is no folder named 'conf' under src file.");
return;
}
File[] confFiles = path.listFiles(new DirFilter(".*\\.properties"));//\\
for (int i = 0; i < confFiles.length; i++) {
File f = confFiles[i];
if (f.exists() && f.isFile()) {
Properties properties = new Properties();
InputStream is = new FileInputStream(f);
properties.load(is);
name2properties.put(f.getName(), properties);
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 获取配置项的值
* @param fileName 配置文件的名称
* @param key 关键码的值
* @return 配置项
*/
public String getProperty(String fileName, String key) {
if (fileName == null || fileName.length() == 0) {
return null;
}
Properties prop = name2properties.get(fileName);
if (prop != null) {
return prop.getProperty(key);
}
return null;
}
/**
* 获取整形的配置项的值
* @param fileName 配置文件的名称
* @param keyName 关键码的值
* @return 如果正确则返回数字，否则返回-1
*/
public int getIntProperty(String fileName, String key) {
String value = this.getProperty(fileName, key);
int result = -1;
if (value == null) {
return result;
}
try {
result = Integer.parseInt(value);
return result;
} catch (Exception e) {
//Do nothing
}
return result;
}
/**
* 过滤属性文件的内部类
*/
class DirFilter implements FilenameFilter {
/**
* 记录文件名格式的正则对象
*/
private Pattern pattern;
public DirFilter(String regex) {
pattern = Pattern.compile(regex);
}
public boolean accept(File dir, String name) {
return pattern.matcher(new File(name).getName()).matches();
}
}
public static void main(String[] args) {
ConfigManager config = ConfigManager.getInstance();
System.out.println(config.getIntProperty("cache.properties", "cache.size") + "");
System.out.println(config.getProperty("javagroups.properties", "bus_name") + "");
}
}
