正文
PropertiesUtil 获取文件属性值
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有时候不要把一些属性值写死在代码中，而是写在配置在文件中，方便更改
PropertiesUtil工具类：读取key-value形式的配置文件，根据key获得value值
1、测试类
public class Test{
private static PropertiesUtil propertiesUtil = new PropertiesUtil("file.properties");
//根据文件中的key获取value值
String value = propertiesUtil.getStringProperty("文件中的key");
}
2、PropertiesUtil.java工具类
package com.util; import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Collection;
import java.util.Properties;
import java.util.Set; import org.apache.log4j.Logger; public class PropertiesUtil { private static final Logger LOGGER = Logger.getLogger(PropertiesUtil.class); private final Properties props; public PropertiesUtil(final Properties props) {
this.props = props;
} public PropertiesUtil(final String propertiesFileName) {
final Properties properties = new Properties();
InputStreamReader in = null;
try {
in = new InputStreamReader(new FileInputStream(this.getClass().getResource("/").getPath()+propertiesFileName), "UTF-8");
/*
* 获取当前工程根目录
* in = new InputStreamReader(new FileInputStream(System.getProperty("user.dir") + File.separator + propertiesFileName), "UTF-8");
*/
properties.load(in);
} catch (final IOException ioe) {
LOGGER.error("Unable to read " + propertiesFileName, ioe);
} finally {
if (in != null) {
try {
in.close();
} catch (final IOException ioe) {
LOGGER.error("Unable to close " + propertiesFileName, ioe);
}
}
}
this.props = properties;
} public String getStringProperty(final String name) {
return props.getProperty(name);
} public int getIntegerProperty(final String name, final int defaultValue) {
String prop = props.getProperty(name);
if (prop != null) {
try {
return Integer.parseInt(prop);
} catch (final Exception ignored) {
return defaultValue;
}
}
return defaultValue;
} public long getLongProperty(final String name, final long defaultValue) {
String prop = props.getProperty(name);
if (prop != null) {
try {
return Long.parseLong(prop);
} catch (final Exception ignored) {
return defaultValue;
}
}
return defaultValue;
} public float getFloatProperty(final String name,final float defaultValue)
{
String prop = props.getProperty(name);
if (prop != null) {
try {
return Float.parseFloat(prop);
} catch (final Exception ignored) {
return defaultValue;
}
}
return defaultValue;
} public String getStringProperty(final String name, final String defaultValue) {
final String prop = getStringProperty(name);
return (prop == null) ? defaultValue : prop;
} public boolean getBooleanProperty(final String name) {
return getBooleanProperty(name, false);
} public boolean getBooleanProperty(final String name, final boolean defaultValue) {
final String prop = getStringProperty(name);
return (prop == null) ? defaultValue : "true".equalsIgnoreCase(prop);
} public Set<Object> keySet()
{
return props.keySet();
} public Collection<Object> values()
{
return props.values();
} }
