Android 下读取Assets Properties操作封装工具类
发布时间：2018-06-03作者：laosun阅读(2081)
为了方便使用，首先创建BaseApplication类，如下所示：import android.app.Application;
import android.content.Context;
/**
* Created by sun on 2018/5/28.
*/
public class BaseApplication extends Application {
private static Context mContext;
@Override
public void onCreate() {
super.onCreate();
mContext = getApplicationContext();
}
public static Context getInstance() {
return mContext;
}
}
创建Prop工具类
import com.sunjs.application.BaseApplication;
import com.sunjs.log.LOG;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;
public class Prop {
private Properties properties = null;
public Prop(String fileName, String encoding) {
InputStream inputStream = null;
try {
inputStream = BaseApplication.getInstance().getAssets().open(fileName);
if (inputStream == null) {
LOG.e(Thread.currentThread().getStackTrace()[1].getClassName(), "Properties file not found in classpath: " + fileName);
}
properties = new Properties();
properties.load(new InputStreamReader(inputStream, encoding));
} catch (IOException e) {
LOG.e(Thread.currentThread().getStackTrace()[1].getClassName(),e,"Error loading properties file.");
} finally {
if (inputStream != null) try {
inputStream.close();
} catch (IOException e) {
LOG.e(Thread.currentThread().getStackTrace()[1].getClassName(),e, e.getMessage());
}
}
}
private ClassLoader getClassLoader() {
ClassLoader ret = Thread.currentThread().getContextClassLoader();
return ret != null ? ret : getClass().getClassLoader();
}
public String get(String key) {
return properties.getProperty(key);
}
public String get(String key, String defaultValue) {
return properties.getProperty(key, defaultValue);
}
public Integer getInt(String key) {
return getInt(key, null);
}
public Integer getInt(String key, Integer defaultValue) {
String value = properties.getProperty(key);
if (value != null) {
return Integer.parseInt(value.trim());
}
return defaultValue;
}
public Long getLong(String key) {
return getLong(key, null);
}
public Long getLong(String key, Long defaultValue) {
String value = properties.getProperty(key);
if (value != null) {
return Long.parseLong(value.trim());
}
return defaultValue;
}
public Boolean getBoolean(String key) {
return getBoolean(key, null);
}
public Boolean getBoolean(String key, Boolean defaultValue) {
String value = properties.getProperty(key);
if (value != null) {
value = value.toLowerCase().trim();
if ("true".equals(value)) {
return true;
} else if ("false".equals(value)) {
return false;
}
throw new RuntimeException("The value can not parse to Boolean : " + value);
}
return defaultValue;
}
public boolean containsKey(String key) {
return properties.containsKey(key);
}
public Properties getProperties() {
return properties;
}
}
创建读取操作类
import java.util.concurrent.ConcurrentHashMap;
/**
* Created by sun on 2018/5/28.
*/
public class PropKit {
private static Prop prop = null;
private static final ConcurrentHashMap map = new ConcurrentHashMap();
private PropKit() {
}
public static Prop use(String fileName) {
return use(fileName, Const.DEFAULT_ENCODING);
}
private static Prop use(String fileName, String encoding) {
Prop result = map.get(fileName);
if (result == null) {
//服务端并发时使用，这块其实不用使用
synchronized (PropKit.class) {
result = map.get(fileName);
if (result == null) {
result = new Prop(fileName, encoding);
map.put(fileName, result);
if (PropKit.prop == null) {
PropKit.prop = result;
}
}
}
}
return result;
}
public static void clear() {
prop = null;
map.clear();
}
public static Prop getProp() {
if (prop == null) {
//默认加载config.properties文件
//这里的Const.default_config就是assets目录下的config.properties
use(Const.default_config);
}
return prop;
}
public static Prop getProp(String fileName) {
return map.get(fileName);
}
public static String get(String key) {
return getProp().get(key);
}
public static String get(String key, String defaultValue) {
return getProp().get(key, defaultValue);
}
public static Integer getInt(String key) {
return getProp().getInt(key);
}
public static Integer getInt(String key, Integer defaultValue) {
return getProp().getInt(key, defaultValue);
}
public static Long getLong(String key) {
return getProp().getLong(key);
}
public static Long getLong(String key, Long defaultValue) {
return getProp().getLong(key, defaultValue);
}
public static Boolean getBoolean(String key) {
return getProp().getBoolean(key);
}
public static Boolean getBoolean(String key, Boolean defaultValue) {
return getProp().getBoolean(key, defaultValue);
}
public static boolean containsKey(String key) {
return getProp().containsKey(key);
}
}
测试：
assets下有config.properties
内容如下：
login.url=
dev.mode=true
使用获取方式如下：
String loginUrl = PropKit.use("config.properties").get("login.url");
boolean devMode = PropKit.getBoolean("dev.mode");
从上边可以看出，.use是填写的assets根目录下的properties文件名称，代码中默认的文件名叫做config.properties，所以也可以不用写.use，可以直接进行获取。
0 +1
版权声明
发表评论
请文明留言
发表
共 0 条评论
设计讲解)
