JDBC改进版

将setObject隐藏，用反射获取model里面的数据

/**
 * @Date 2016年7月19日
 *
 * @author Administrator
 */
package com.eshore.fileExport;

import java.lang.reflect.Field;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.beanutils.BeanUtils;

/**
 * @author mercy
 *
 */
public class Converter<T> {

	public static <T> T convert2Bean(ResultSet rs, Class<T> bean) throws Exception {
		Field[] fields = bean.getDeclaredFields();
		T obj = bean.newInstance();
		for (Field field : fields) {
			String pname = field.getName();
			BeanUtils.setProperty(obj, pname, rs.getObject(pname));
		}

		return obj != null ? obj : null;
	}

	public static <T> List<T> convert2BeanList(ResultSet rs, Class<T> bean) throws Exception {
		Field[] fields = bean.getDeclaredFields();
		List<T> lists = new ArrayList<T>();
		String pName="";
		String sqlName="";
		while (rs.next()) {
			T obj = bean.newInstance();
			for (Field field : fields) {
				String newName=getUnderlineString(field.getName());
				if(newName.contains("_")){
					String f1=newName.substring(0,newName.indexOf("_"));
					String f2=newName.substring(newName.indexOf("_"),newName.indexOf("_")+1);
					String f3=newName.substring(newName.indexOf("_")+1,newName.length());
					System.out.println("f1:"+f1+",f2:"+f2+",f3:"+f3);
					sqlName=f1+f2+f3;
				}
				pName = field.getName();
				BeanUtils.setProperty(obj, pName, rs.getObject(sqlName));
			}
			lists.add(obj);
		}
		return lists != null ? lists : null;
	}
	public static char upperOrLower(char c){
		if(c <= 90 && c >= 65){
            c += 32;
        } else if(c <= 122 && c >= 97){
            c -= 32;
        }
		return c;
	}
	public static boolean isUpper(char c){
		if(c <= 90 && c >= 65){
            return true;
        } else if(c <= 122 && c >= 97){
            return false;
        }
		return false;
	}
	//由payType转为pay_type
	public static String getUnderlineString(String str){
		StringBuilder strs=new StringBuilder();
		for(int i=0;i<str.length();i++){
			if(isUpper(str.charAt(i))){
				strs.append("_").append(upperOrLower(str.charAt(i)));
			}else{
				strs.append(str.charAt(i));
			}
		}
		return strs.toString();
	}

}

　引用：

//获取前一天的所有计费数据
	public List<BillData> queryBillList(int start,int size){
		logger.info("query data...");
		String sqlStr=sqlQuery+tableName;
		List<BillData> billList=new ArrayList<BillData>();
		ResultSet rs=null;
		if(start!=0||size!=0){
			sqlStr=sqlStr+" limit ?,?";
			rs=util.Query(sqlStr,start,size);
		}else{
			rs=util.Query(sqlStr,null);
		}
		try {
			return rs != null ? Converter.convert2BeanList(rs, BillData.class) : null;
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
		//logger.info("sql：{}",sqlStr);
		/*try {
			while(rs.next()){
				BillData bill=new BillData();
				int i=1;
				bill.setBusinessNumber(String.valueOf(rs.getObject(i++)));
				bill.setPayType(Integer.parseInt(String.valueOf(rs.getObject(i++))));
				bill.setAreaCode(String.valueOf(rs.getObject(i++)));
				bill.setCreateTime(Timestamp.valueOf(String.valueOf(rs.getObject(i++))));
				bill.setProductId(String.valueOf(rs.getObject(i++)));
				bill.setProductSpecCode(String.valueOf(rs.getObject(i++)));
				bill.setProductName(String.valueOf(rs.getObject(i++)));
				bill.setPrice(Integer.parseInt(String.valueOf(rs.getObject(i++))));
				bill.setBookType(Integer.parseInt(String.valueOf(rs.getObject(i++))));
				bill.setAccType(String.valueOf(rs.getObject(i++)));
				bill.setDeleCode(String.valueOf(rs.getObject(i++)));
				billList.add(bill);
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return billList;*/
	}

　　

　如果还要再全一点的话就是把Conveter当成一个实现类，再写两个接口方法，并且加上数据库池。

DBHelper：

package dbhelper;

import java.io.PrintWriter;
import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
import java.util.logging.Logger;

import javax.sql.DataSource;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import utils.XMLUtils;

public class DbHelper implements DataSource {

	/**
	 * 用于暂时的存储数据库信息的Map
	 */
	private static Map<String, String> map = new HashMap<String, String>();

	/*
	 * 既然是一个数据库连接池，就必须有许多的连接，所以需要使用一个集合类保存这些连接 (non-Javadoc)
	 *
	 * @see javax.sql.CommonDataSource#getLogWriter()
	 */
	public static LinkedList<Connection> connpool = new LinkedList<Connection>();

	/**
	 * 通过XMLUtils实现对配置文件的信息读取，并实现DriverManager的使用
	 *
	 * @throws Exception
	 */
	static {
		try {
			Document document = XMLUtils.getDocument();
			NodeList nodes = document.getElementsByTagName("database");
			for (int i = 0; i < nodes.getLength(); i++) {
				Element element = (Element) nodes.item(i);
				switch (element.getAttribute("name")) {
				case "mysql":
					NodeList childs = element.getChildNodes();
					for (int j = 0; j < childs.getLength(); j++) {
						Node node = childs.item(j);
						String nodename = node.getNodeName();
						String nodevalue = node.getTextContent();
						map.put(nodename, nodevalue);
					}
					break;
				case "sqlserver":
					break;
				}
			}
		} catch (Exception e) {
			// TODO: handle exception
		}

	}

	/**
	 * 预先注册数据源 ，保证数据可以正常的获取，每次查询的时候先调用这个方法
	 *
	 * @throws Exception
	 */
	public static void register() throws Exception {
		String DRIVER = map.get("driver");
		String URL = map.get("url");
		String USER = map.get("user");
		String PASSWORD = map.get("password");
		Integer DATABASE_CONNECTION_POOL_SIZE = Integer.valueOf(map.get("poolsize"));
		// 预先 添加驱动信息
		Class.forName(DRIVER);

		for (int index = 0; index < DATABASE_CONNECTION_POOL_SIZE; index++) {
			Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
			connpool.add(conn);
		}
	}

	/**
	 * 释放数据库连接对象
	 *
	 * @param conn
	 *            给定的数据库连接对象
	 */
	public static void release(Connection conn) {
		try {
			if (conn != null) {
				connpool.add(conn);
			}
		} catch (Exception e) {
			throw new RuntimeException("释放数据库连接对象时出错！ :\n" + e);
		}
	}

	/**
	 * 释放数据库连接对象以及数据库查询对象
	 *
	 * @param conn
	 *            数据库连接对象
	 * @param stmt
	 *            数据库查询语句
	 */
	public static void release(Connection conn, Statement stmt) {

		try {
			if (stmt != null) {
				stmt.close();
				stmt = null;
			}
		} catch (Exception e) {
			throw new RuntimeException("释放数据库查询对象Statement时出错！ :\n" + e);
		} finally {
			try {
				if (stmt != null) {
					stmt.close();
					stmt = null;
				}
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
		}

		release(conn);
	}

	public static void release(Connection conn, Statement stmt, ResultSet rs) {

		try {
			if (rs != null) {
				rs.close();
				rs = null;
			}
		} catch (Exception e) {
			throw new RuntimeException(" 关闭数据库结果集对象时出错！:\n" + e);
		} finally {
			try {
				if (rs != null) {
					rs.close();
					rs = null;
				}
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
		}

		try {
			if (stmt != null) {
				stmt.close();
				stmt = null;
			}
		} catch (Exception e) {
			throw new RuntimeException("释放数据库查询对象Statement时出错！ :\n" + e);
		} finally {
			try {
				if (stmt != null) {
					stmt.close();
					stmt = null;
				}
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
		}

		release(conn);
	}

	/**
	 * 从数据库连接池中获取数据库连接对象，同时维护好池的内容实时更新
	 */
	@Override
	public Connection getConnection() throws SQLException {

		if (connpool.size() <= 0) {
			throw new RuntimeException("数据库忙，请待会再试试吧！");
		}
		// 需要注意的是，不能使用get方式（这个方法知识返回一个引用而已）,
		// 应该在获取的同时，删除掉这个链接，之后再还回来.现在注意是返还给数据库连接池！！！
		Connection conn = connpool.removeFirst();
		MyConnection myconn = new MyConnection(conn);

		// 从这里开始返回的就是一个数据库连接池对象的conn
		return myconn;
	}

	///////////////////////////////////////////////////////////////////////// datasource接口的实现方法开始

	@Override
	public PrintWriter getLogWriter() throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void setLogWriter(PrintWriter out) throws SQLException {
		// TODO Auto-generated method stub

	}

	@Override
	public void setLoginTimeout(int seconds) throws SQLException {
		// TODO Auto-generated method stub

	}

	@Override
	public int getLoginTimeout() throws SQLException {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public Logger getParentLogger() throws SQLFeatureNotSupportedException {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public <T> T unwrap(Class<T> iface) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public boolean isWrapperFor(Class<?> iface) throws SQLException {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public Connection getConnection(String username, String password) throws SQLException {
		// TODO Auto-generated method stub
		return null;
	}
	///////////////////////////////////////////////////////////////////////// datasource接口的实现方法结束

	/**
	 * 包装设计模式实现流程： 1.创建一个类，实现与被增强对象相同的接口 2.将被增强对象当做自定义类的一个成员变量
	 * 3.定义一个构造方法，将被增强对象传递进去 4.增强想要增强的方法，进行覆盖即可 5.对于不想被增强的方法，调用被增强对象的方法进行处理即可
	 *
	 * @author mercy
	 *
	 */

	/////////////////////////////////////////////////////////////////////// 使用包装设计模式，增强close方法的自定义类开始
	class MyConnection implements Connection {

		private Connection conn;

		public MyConnection(Connection conn) {
			this.conn = conn;
		}

		/**
		 * 自定义的包装设计模式类，增强close方法， 将数据库链接资源返还给数据库连接池，而不是数据库
		 */
		public void close() {
			connpool.add(conn);
		}

		@Override
		public <T> T unwrap(Class<T> iface) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.unwrap(iface);
		}

		@Override
		public boolean isWrapperFor(Class<?> iface) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.isWrapperFor(iface);
		}

		@Override
		public Statement createStatement() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createStatement();
		}

		@Override
		public PreparedStatement prepareStatement(String sql) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareStatement(sql);
		}

		@Override
		public CallableStatement prepareCall(String sql) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareCall(sql);
		}

		@Override
		public String nativeSQL(String sql) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.nativeSQL(sql);
		}

		@Override
		public void setAutoCommit(boolean autoCommit) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setAutoCommit(autoCommit);
		}

		@Override
		public boolean getAutoCommit() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getAutoCommit();
		}

		@Override
		public void commit() throws SQLException {
			// TODO Auto-generated method stub
			this.conn.commit();
		}

		@Override
		public void rollback() throws SQLException {
			// TODO Auto-generated method stub
			this.conn.rollback();
		}

		@Override
		public boolean isClosed() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.isClosed();
		}

		@Override
		public DatabaseMetaData getMetaData() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getMetaData();
		}

		@Override
		public void setReadOnly(boolean readOnly) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setReadOnly(readOnly);
		}

		@Override
		public boolean isReadOnly() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.isReadOnly();
		}

		@Override
		public void setCatalog(String catalog) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setCatalog(catalog);
		}

		@Override
		public String getCatalog() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getCatalog();
		}

		@Override
		public void setTransactionIsolation(int level) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setTransactionIsolation(level);
		}

		@Override
		public int getTransactionIsolation() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getTransactionIsolation();
		}

		@Override
		public SQLWarning getWarnings() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getWarnings();
		}

		@Override
		public void clearWarnings() throws SQLException {
			// TODO Auto-generated method stub
			this.conn.clearWarnings();
		}

		@Override
		public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createStatement(resultSetType, resultSetConcurrency);
		}

		@Override
		public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
				throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareStatement(sql, resultSetType, resultSetConcurrency);
		}

		@Override
		public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency)
				throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareCall(sql, resultSetType, resultSetConcurrency);
		}

		@Override
		public Map<String, Class<?>> getTypeMap() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getTypeMap();
		}

		@Override
		public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setTypeMap(map);
		}

		@Override
		public void setHoldability(int holdability) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setHoldability(holdability);
		}

		@Override
		public int getHoldability() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getHoldability();
		}

		@Override
		public Savepoint setSavepoint() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.setSavepoint();
		}

		@Override
		public Savepoint setSavepoint(String name) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.setSavepoint(name);
		}

		@Override
		public void rollback(Savepoint savepoint) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.rollback(savepoint);
		}

		@Override
		public void releaseSavepoint(Savepoint savepoint) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.releaseSavepoint(savepoint);
		}

		@Override
		public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
				throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
		}

		@Override
		public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency,
				int resultSetHoldability) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
		}

		@Override
		public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
				int resultSetHoldability) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
		}

		@Override
		public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareStatement(sql, autoGeneratedKeys);
		}

		@Override
		public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareStatement(sql, columnIndexes);
		}

		@Override
		public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.prepareStatement(sql, columnNames);
		}

		@Override
		public Clob createClob() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createClob();
		}

		@Override
		public Blob createBlob() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createBlob();
		}

		@Override
		public NClob createNClob() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createNClob();
		}

		@Override
		public SQLXML createSQLXML() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createSQLXML();
		}

		@Override
		public boolean isValid(int timeout) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.isValid(timeout);
		}

		@Override
		public void setClientInfo(String name, String value) throws SQLClientInfoException {
			// TODO Auto-generated method stub
			this.conn.setClientInfo(name, value);
		}

		@Override
		public void setClientInfo(Properties properties) throws SQLClientInfoException {
			// TODO Auto-generated method stub
			this.conn.setClientInfo(properties);
		}

		@Override
		public String getClientInfo(String name) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getClientInfo(name);
		}

		@Override
		public Properties getClientInfo() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getClientInfo();
		}

		@Override
		public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createArrayOf(typeName, elements);
		}

		@Override
		public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.createStruct(typeName, attributes);
		}

		@Override
		public void setSchema(String schema) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setSchema(schema);
		}

		@Override
		public String getSchema() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getSchema();
		}

		@Override
		public void abort(Executor executor) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.abort(executor);
		}

		@Override
		public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
			// TODO Auto-generated method stub
			this.conn.setNetworkTimeout(executor, milliseconds);
		}

		@Override
		public int getNetworkTimeout() throws SQLException {
			// TODO Auto-generated method stub
			return this.conn.getNetworkTimeout();
		}

	}
	///////////////////////////////////////////////////////////////////////////// 包装设计模式结束
}

　　QueryRunner：

/**
 * @Date 2016年7月19日
 *
 * @author Administrator
 */
package dbhelper;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.List;

import handlers.BeanListHandler;
import handlers.Handler;

/**
 * 业务核心类，实现自动化处理
 *
 * 包括自动化的增删改查
 *
 * @author 郭瑞彪
 *
 */
public class QueryRunner {

	/**
	 * 数据库查询,根据给定的查询条件 返回实例化之后的bean对象
	 *
	 * @param conn
	 *            数据库连接对象
	 * @param sql
	 *            进行查询的sql语句
	 * @param handler
	 *            处理结果集的接口实现
	 * @param params
	 *            对应于SQL语句的参数描述
	 * @return 返回实例化Bean对象
	 * @throws Exception
	 */
	public <T> T query(Connection conn, String sql, Handler<T> handler, Object... params) throws Exception {
		PreparedStatement ps = conn.prepareStatement(sql);
		if (params != null) {
			for (int i = 0; i < params.length; i++) {
				ps.setObject((i + 1), params[i]);
			}
		}
		ResultSet rs = ps.executeQuery();
		return handler.handle(rs);
	}

	/**
	 * 数据库查询,根据给定的查询条件 返回实例化之后的bean对象
	 *
	 * @param conn
	 *            数据库连接对象
	 * @param sql
	 *            进行查询的sql语句
	 * @param handler
	 *            处理结果集的接口实现
	 * @return 返回实例化Bean对象
	 * @throws Exception
	 */
	public <T> T query(Connection conn, String sql, Handler<T> handler) throws Exception {
		PreparedStatement ps = conn.prepareStatement(sql);
		ResultSet rs = ps.executeQuery();
		return handler.handle(rs);
	}

	/**
	 * 数据库查询,根据给定的查询条件 返回实例化之后的bean对象。此处对应于无参的处理方式
	 *
	 * @param conn
	 *            数据库连接对象
	 * @param sql
	 *            进行查询的sql语句
	 * @param handler
	 *            处理结果集的接口实现
	 * @return 返回实例化Bean对象
	 * @throws Exception
	 */
	public <T> List<T> query(Connection conn, String sql, BeanListHandler<T> beanListHandler) throws Exception {
		PreparedStatement ps = conn.prepareStatement(sql);
		ResultSet rs = ps.executeQuery();
		return beanListHandler.handle(rs);
	}

	/**
	 * 数据库查询,根据给定的查询条件 返回封装了实例化的Bean对象的集合
	 *
	 * @param conn
	 *            数据库连接对象
	 * @param sql
	 *            进行查询的sql语句
	 * @param handler
	 *            处理结果集的接口实现
	 * @param params
	 *            对应于SQL语句的参数描述
	 * @return 返回封装了实例化之后的bean集合
	 * @throws Exception
	 */
	public <T> List<T> query(Connection conn, String sql, BeanListHandler<T> beanListHandler, Object... params)
			throws Exception {
		PreparedStatement ps = conn.prepareStatement(sql);
		/**
		*  fixed bug:  之前忘记了处理params对应于sql语句中的占位符表达了，所以可能导致sql语句未赋值的问题。现已解决。
		*/
		if (params != null) {
			for (int i = 0; i < params.length; i++) {
				ps.setObject((i + 1), params[i]);
			}
		}
		ResultSet rs = ps.executeQuery();
		return beanListHandler.handle(rs);
	}

	/**
	 * 根据给定的参数实现向数据库中给定SQL语句的update,delete,insert 操作
	 *
	 * @param conn
	 *            数据库连接对象，用户不必关心其释放问题，这里自动将其释放
	 * @param sql
	 *            数据库查询语句
	 * @param params
	 *            对应于SQL语句占位符的参数列表
	 * @throws Exception
	 */
	public void update(Connection conn, String sql, Object... params) throws Exception {
		PreparedStatement ps = conn.prepareStatement(sql);
		for (int i = 0; i < params.length; i++) {
			ps.setObject((i + 1), params[i]);
		}
		ps.executeUpdate();
		DbHelper.release(conn, ps);
	}

}

　　BeanHandler：

/**
 * @Date 2016年7月19日
 *
 * @author Administrator
 */
package handlers;

import java.sql.ResultSet;
import java.sql.SQLException;

import dbhelper.Conveter;

/**
 * @author mercy
 *
 */
public class BeanHandler<T> implements Handler<T> {

	/**
	 * The Class of beans produced by this handler.
	 */
	private final Class<T> type;

	/**
	 * Creates a new instance of BeanHandler.
	 *
	 * @param type
	 *            The Class that objects returned from <code>handle()</code> are
	 *            created from.
	 */
	public BeanHandler(Class<T> type) {
		this.type = type;
	}

	/*
	 * (non-Javadoc)
	 *
	 * @see handlers.Handler#handle(java.sql.ResultSet)
	 */
	@Override
	public T handle(ResultSet rs) {
		try {
			return rs.next() ? Conveter.convert2Bean(rs, this.type) : null;
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

}

BeanListHandler：　

/**
 * @Date 2016年7月19日
 *
 * @author Administrator
 */
package handlers;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import dbhelper.Conveter;

/**
 * @author mercy
 *
 */
public class BeanListHandler<T> implements ListHandler<T> {

	/**
	 * The Class of beans produced by this handler.
	 */
	private final Class<T> type;

	/**
	 * Creates a new instance of BeanHandler.
	 *
	 * @param type
	 *            The Class that objects returned from <code>handle()</code> are
	 *            created from.
	 */

	public BeanListHandler(Class<T> type) {
		this.type = type;
	}

	/*
	 * (non-Javadoc)
	 *
	 * @see handlers.Handler#handle(java.sql.ResultSet)
	 */
	@Override
	public List<T> handle(ResultSet rs) throws SQLException {
		try {
			return rs != null ? Conveter.convert2BeanList(rs, this.type) : null;
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

}

　XMLUtils：

　

/**
 * @Date 2016年7月19日
 *
 * @author Administrator
 */
package utils;

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;

/**
 * 提供实现对db.cfg.xml文件的读和查找工作
 *
 * @author mercy
 *
 */
public class XMLUtils {

	// all the utils methods are static
	public static Document getDocument() throws Exception {

		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		DocumentBuilder builder = factory.newDocumentBuilder();
		Document document = builder.parse(new File("src/db.cfg.xml"));
		return document;
	}

	public static void write2Xml(Document document) throws Exception {

		TransformerFactory factory = TransformerFactory.newInstance();
		Transformer transformer = factory.newTransformer();

		// wrapper the two arguments
		DOMSource xmlSource = new DOMSource(document);

		StreamResult targetResult = new StreamResult(new File("src/db.cfg.xml"));

		transformer.transform(xmlSource, targetResult);

	}

}

db.cfg.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<project>
	<database name="mysql">
		<driver>com.mysql.jdbc.Driver</driver>
		<url>jdbc:mysql://192.168.115.72:8066/charge?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull</url>
		<user>root</user>
		<password>mysql</password>
		<poolsize>3</poolsize>
	</database>
</project>

读取properties数据：

package com.eshore.fileExport;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ReadSettingFileUtils {
	private Logger logger=LoggerFactory.getLogger(this.getClass());
	//private static final String fileName="D:/fileTest1/properties/fileSettings.properties";
	//private static final String fileName="/home/billing/test/fileSettings.properties";
	private static final String fileName="/home/ismp/write_charge/program/setting/fileSettings.properties";
	private static final String projectFileName="/fileSettings.properties";
	private static  Properties properties = new Properties();
	public Map<String, String> getFileContent(){
		this.load();
		Map<String, String> map = new HashMap<String, String>((Map) properties);
		return map;
	}
	 /**
	 * 从文件里面读取不到配置的话就读取项目路径下的配置
	 * @author mercy
	 */
	public void load() {
	        if (null != properties) {
	            InputStream in = null;
	            try {
                    /* 从文件路径获取配置文件 */
                    logger.debug("classpath not found filename!!");
                    in = new FileInputStream(fileName);
                    properties.load(in);
	                logger.info("load config file success!");
	            } catch (FileNotFoundException e) {
	                logger.warn(" server config file not found!");
					in = this.getClass().getResourceAsStream(projectFileName);
					 try {
						properties.load(in);
					} catch (IOException e1) {
						e1.printStackTrace();
					}

	            } catch (IOException e) {
	                logger.error("load config file error!", e);
	            } finally {
	                if (null != in) {
	                    try {
	                        in.close();
	                    } catch (IOException e) {
	                        logger.error("read config file error:", e);
	                    }
	                }
	            }
	        }
	    }
}

　　

MapRegister：　　

package com.eshore.fileExport;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MapRegister{
	private Logger log=LoggerFactory.getLogger(this.getClass());
	public static Map<String, String> map = new HashMap<String, String>();
	public void init(){
		map= new ReadSettingFileUtils().getFileContent();
		 for (Entry<String, String> entry : map.entrySet()) {
				log.info("key:"+entry.getKey()+",value:"+entry.getValue());
			}
	}
	public static Map<String, String> getMap() {
		return map;
	}
	public static void setMap(Map<String, String> map) {
		MapRegister.map = map;
	}
}

propertis配置文件：　　

　

##driver name
driver=com.mysql.jdbc.Driver
##database url
##acccount
#user=root
##password
#password=123456
##table name
url=jdbc:mysql://127.0.0.1:8066/charge?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
user=mycat
password=test
tableName=T_HB_DAY_FTP_MONITOR_DATA
##source file path
#ftpDir=/home/ismp/write_charge/program/data/file/
ftpDir=D:/fileTest1/old/
##bak file path
#localBakDir=/home/ismp/write_charge/program/data/bak/
localBakDir=D:/fileTest1/new/
fileName=ETE_0_100003_CEI015_2_L_yyyymmdd_000000_20_0_xxx.json
dataNum=50000