上次的文章中提到了：编写工具类，工具类中实现，，根据日志管理表，创建log4j.properties配置文件。
工具类的具体实现如下：
package com.work.log.service.util;import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileWriter;import java.io.IOException;import java.io.InputStream;import java.util.List;import java.util.Properties;import org.apache.log4j.Logger;import com.work.log.bean.LogConfigBean;public class BuildLog4jPropertiesFile {private Logger LOG = Logger.getLogger(BuildLog4jPropertiesFile.class);private static String WEB_INF_PATH = BuildLog4jPropertiesFile.class.getResource("/").getPath();private static String LOG4J_BACK_PROP = "log4j_back.properties";private static final String ENTER_CODE = "\r\n";private static String LOG4J_PROPERTIES_NAME = "log4j.properties";private static String LOG_PATH = WEB_INF_PATH+"../../../../logs/";private static final String LAYOUT_PATTERN_VALUE = "%-d{yyyyMMdd HH:mm:ss} [%l] – [ %p ] %m%n"; private static final String LOG4J_APPEND_KEY_PREFIX = "log4j.appender."; private static final String FILE_KEY_PREFIX = ".File"; private static final String DATE_PATTERN_KEY = ".DatePattern"; private static final String DATE_PATTERN_VALUE = "’.’yyyyMMdd"; private static final String MAX_FILE_SIZE_KEY_PREFIX = ".MaxFileSize"; private static final String MAX_BACKUP_INDEX = ".MaxBackupIndex"; private static final String LAYOUT_KEY_PREFIX = ".layout"; private static final String LAYOUT_VALUE = "org.apache.log4j.PatternLayout"; private static final String LAYOUT_PATTERN_KEY = ".layout.ConversionPattern"; private static final String LOG4J_KEY_PREFIX = "log4j.logger."; private static final String FILE_APPEND_VALUE = "org.apache.log4j.DailyRollingFileAppender"; private static final String COMMA = ",";
人生谁无少年时，甜苦酸辛各自知。
