【Java框架型项目从入门到装逼】第十节 simple-jdbc源码

这一节就简单贴一下simple-jdbc框架的源码，其实也没多少东西，都很简单的啦。这个小框架就是对之前 文章发布系统博客 中封装的jdbc工具类，进行的一个强化。

目录结构：

1、DBCP_source

package com.simple.core;

import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.commons.dbcp.BasicDataSourceFactory;

public class DBCP_source {
    private static DataSource ds = null;

    static {
        try {
            InputStream e = DBCP_source.class.getClassLoader().getResourceAsStream("dbcpconfig.properties");
            Properties prop = new Properties();
            prop.load(e);
            ds = BasicDataSourceFactory.createDataSource(prop);
        } catch (Exception arg1) {
            throw new ExceptionInInitializerError(arg1);
        }
    }

    public static Connection getConnection() throws SQLException {
        return ds.getConnection();
    }

    public static void release(Connection conn, Statement st, ResultSet rs) {
        if (rs != null) {
            try {
                rs.close();
            } catch (Exception arg5) {
                arg5.printStackTrace();
            }

            rs = null;
        }

        if (st != null) {
            try {
                st.close();
            } catch (Exception arg4) {
                arg4.printStackTrace();
            }
        }

        if (conn != null) {
            try {
                conn.close();
            } catch (Exception arg3) {
                arg3.printStackTrace();
            }
        }

    }

    public static void main(String[] args) throws SQLException {
        System.out.println(getConnection());
    }
}

2、PropertiesUtil

package com.simple.core;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class PropertiesUtil {
    public static String getValue(String propertyPath, String key) {
        Properties prop = new Properties();
        InputStream in = (new PropertiesUtil()).getClass().getResourceAsStream(propertyPath);

        try {
            prop.load(in);
        } catch (IOException arg4) {
            arg4.printStackTrace();
        }

        return (String) prop.get(key);
    }
}

3、StringUtils

package com.simple.core;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.UUID;

public class StringUtils {
    public static String firstCharacterLowerCase(String str) {
        String firstCharacter = String.valueOf(str.charAt(0)).toLowerCase();
        return firstCharacter + str.substring(1, str.length());
    }

    public static Object[] extendArray(Object[] array, Object... objects) {
        Object[] newArray = null;
        if (array.length < 1) {
            return objects;
        } else {
            newArray = new Object[array.length + objects.length];

            int i;
            for (i = 0; i < array.length; ++i) {
                newArray[i] = array[i];
            }

            for (i = 0; i < objects.length; ++i) {
                newArray[array.length + i] = objects[i];
            }

            return newArray;
        }
    }

    public static String getUUID() {
        return UUID.randomUUID().toString();
    }

    public static Object[] listToObjectArray(List