java內容

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文件內容

jdbc.driverClass = com.mysql.jdbc.Driverjdbc.url = jdbc:mysql://127.0.0.1:3306/LY?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=truejdbc.username = rootjdbc.password = rootjdbc.minPoolSize=2jdbc.maxPoolSize=20jdbc.checkoutTimeout=3000jdbc.maxStatements=50jdbc.testConnectionOnCheckin = falsejdbc.idleConnectionTestPeriod =18000

補充知識：模仿com.alibaba.fastjson.JSONObject取值的PropertiesUtils

1.依賴于：fastjson

<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.39</version></dependency>

2.話不多說，上代碼

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讀取配置文件 * * @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;elsereturn TypeUtils.castToBoolean(value);} public static byte[] getBytes(String key) {Object value = getProperty(key);if (value == null)return null;elsereturn TypeUtils.castToBytes(value);} public static boolean getBooleanValue(String key) {Object value = getProperty(key);if (value == null)return false;elsereturn 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;elsereturn 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;elsereturn 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;elsereturn 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;elsereturn 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;elsereturn 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;elsereturn 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;elsereturn 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');}}

以上這篇java項目中讀取jdbc.properties文件操作就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持好吧啦網。