本篇文章为大家展示了如何读取java项目中的jdbc.properties文件，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
java内容
Properties props = Resources.getResourceAsProperties("jdbc.properties");
String url = props.getProperty("jdbc.url");
String driver = props.getProperty("jdbc.driverClass");
String username = props.getProperty("jdbc.username");
String password = props.getProperty("jdbc.password");
Class.forName(driver).newInstance();
Connection conn = (Connection) DriverManager.getConnection(url, username, password);jdbc.properties文件内容
jdbc.driverClass = com.mysql.jdbc.Driver jdbc.url = jdbc\:mysql\://127.0.0.1\:3306/LY?useUnicode\=true&characterEncoding\=UTF-8&zeroDateTimeBehavior\=convertToNull&allowMultiQueries\=true jdbc.username = root jdbc.password = root jdbc.minPoolSize=2 jdbc.maxPoolSize=20 jdbc.checkoutTimeout=3000 jdbc.maxStatements=50 jdbc.testConnectionOnCheckin = false jdbc.idleConnectionTestPeriod =18000
补充知识：模仿com.alibaba.fastjson.JSONObject取值的PropertiesUtils
1.依赖于：fastjson
<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.39</version> </dependency>
2.话不多说，上代码
package com.gy.common.util;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Timestamp;
import java.util.Date;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.fastjson.util.TypeUtils;
/**
* java读取配置文件
*
* @author Neo 2017-5-12
* @version 1.1
*
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public class PropertiesUtils {
private static Logger logger = LoggerFactory.getLogger(PropertiesUtils.class);
private static Properties properties;
private static final String PROPERTIES_EGIS_FILE_NAME = "application/config.properties";
static {
properties = new Properties();
InputStream scmsStream = null;
try {
scmsStream = PropertiesUtils.class.getClassLoader().getResourceAsStream(PROPERTIES_EGIS_FILE_NAME);
properties.load(scmsStream);
logger.info("PropertiesUtils", "staitc init prop", properties.toString());
} catch (Exception e) {
} finally {
try {
if (scmsStream != null) {
scmsStream.close();
}
} catch (Exception e) {
}
}
}
public static String getProperty(String key) {
String result = properties.getProperty(key);
return result;
}
public static String getProperty(String key, String defaultValue) {
String result = properties.getProperty(key, defaultValue);
return result;
}
public static String getProperties(String propertiesName, String key) {
Properties props = new Properties();
InputStream inputStream = null;
try {
inputStream = PropertiesUtils.class.getClassLoader().getResourceAsStream(propertiesName);
props.load(inputStream);
} catch (IOException e) {
} finally {
try {
if (inputStream != null) {
inputStream.close();
}
} catch (Exception e) {
}
}
return props.getProperty(key);
}
public static Object getObject(String key, Class clazz) {
Object obj = getProperty(key);
return TypeUtils.castToJavaBean(obj, clazz);
}
public static Boolean getBoolean(String key) {
Object value = getProperty(key);
if (value == null)
return null;
else
return TypeUtils.castToBoolean(value);
}
public static byte[] getBytes(String key) {
Object value = getProperty(key);
if (value == null)
return null;
else
return TypeUtils.castToBytes(value);
}
public static boolean getBooleanValue(String key) {
Object value = getProperty(key);
if (value == null)
return false;
else
return TypeUtils.castToBoolean(value).booleanValue();
}
public static Byte getByte(String key) {
Object value = getProperty(key);
return TypeUtils.castToByte(value);
}
public static byte getByteValue(String key) {
Object value = getProperty(key);
if (value == null)
return 0;
else
return TypeUtils.castToByte(value).byteValue();
}
public static Short getShort(String key) {
Object value = getProperty(key);
return TypeUtils.castToShort(value);
}
public static short getShortValue(String key) {
Object value = getProperty(key);
if (value == null)
return 0;
else
return TypeUtils.castToShort(value).shortValue();
}
public static Integer getInteger(String key) {
Object value = getProperty(key);
return TypeUtils.castToInt(value);
}
public static int getIntValue(String key) {
Object value = getProperty(key);
if (value == null)
return 0;
else
return TypeUtils.castToInt(value).intValue();
}
public static Long getLong(String key) {
Object value = getProperty(key);
return TypeUtils.castToLong(value);
}
public static long getLongValue(String key) {
Object value = getProperty(key);
if (value == null)
return 0L;
else
return TypeUtils.castToLong(value).longValue();
}
public static Float getFloat(String key) {
Object value = getProperty(key);
return TypeUtils.castToFloat(value);
}
public static float getFloatValue(String key) {
Object value = getProperty(key);
if (value == null)
return 0.0F;
else
return TypeUtils.castToFloat(value).floatValue();
}
public static Double getDouble(String key) {
Object value = getProperty(key);
return TypeUtils.castToDouble(value);
}
public static double getDoubleValue(String key) {
Object value = getProperty(key);
if (value == null)
return 0.0D;
else
return TypeUtils.castToDouble(value).doubleValue();
}
public static BigDecimal getBigDecimal(String key) {
Object value = getProperty(key);
return TypeUtils.castToBigDecimal(value);
}
public static BigInteger getBigInteger(String key) {
Object value = getProperty(key);
return TypeUtils.castToBigInteger(value);
}
public static String getString(String key) {
Object value = getProperty(key);
if (value == null)
return null;
else
return value.toString();
}
public static Date getDate(String key) {
Object value = getProperty(key);
return TypeUtils.castToDate(value);
}
public static java.sql.Date getSqlDate(String key) {
Object value = getProperty(key);
return TypeUtils.castToSqlDate(value);
}
public static Timestamp getTimestamp(String key) {
Object value = getProperty(key);
return TypeUtils.castToTimestamp(value);
}
public static void main(String[] args) {
if(getBooleanValue("isNeedLogin"))
System.out.println("aaa");
}
}上述内容就是如何读取java项目中的jdbc.properties文件，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注亿速云行业资讯频道。
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