package utils;import java.io.IOException;import java.sql.CallableStatement;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.ResultSetMetaData;import java.sql.SQLException;import java.sql.Statement;import java.sql.Types;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Properties;import org.apache.tomcat.jdbc.pool.DataSource;import org.apache.tomcat.jdbc.pool.PoolProperties;/** * edit by lxj 2016-10-19 * 采用tomcat7的最新数据库连接池技术进行处理参考以下网址 * https://tomcat.apache.org/tomcat-7.0-doc/jdbc-pool.html#Introduction * 需要引入tomcat-juli.jar和tomcat-jdbc.jar两个包 * @author Administrator *  */public class MySqlHelper {    private static DataSource datasource;    public MySqlHelper()    {        if(datasource==null)        {            Properties pro=new Properties();            try {                pro.load(this.getClass().getResourceAsStream("/dbinfo.properties"));            } catch (IOException e) {                e.printStackTrace();            }            String jdbcDriver=pro.getProperty("driver");            String dbUrl=pro.getProperty("url");            String dbUsername=pro.getProperty("userName");            String dbPassword=pro.getProperty("password");            PoolProperties p = new PoolProperties();            p.setUrl(dbUrl);            p.setDriverClassName(jdbcDriver);            p.setUsername(dbUsername);            p.setPassword(dbPassword);            p.setJmxEnabled(true);            p.setTestWhileIdle(false);            p.setTestOnBorrow(true);            p.setValidationQuery("SELECT 1");            p.setTestOnReturn(false);            p.setValidationInterval(30000);            p.setTimeBetweenEvictionRunsMillis(30000);            p.setMaxActive(100);            p.setInitialSize(3);            p.setMaxWait(10000);            p.setRemoveAbandonedTimeout(60);            p.setMinEvictableIdleTimeMillis(30000);            p.setMinIdle(10);            p.setLogAbandoned(true);            p.setRemoveAbandoned(true);            p.setJdbcInterceptors(              "org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;"+              "org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer");            datasource = new DataSource();            datasource.setPoolProperties(p);        }    }    /**     * 查询     * @param sql     * @param lo     * @return     */    public List<Map<String, Object>> search(String sql, Object[] lo) {        List<Map<String, Object>> lm = new ArrayList<Map<String, Object>>();        Connection con = null;        PreparedStatement ps =null;        ResultSet rs=null;        try {            con = datasource.getConnection();            ps = con.prepareStatement(sql);            if (lo != null) {                for (int i = 1; i <= lo.length; i++) {                    ps.setObject(i, lo[i - 1]);                }            }            rs = ps.executeQuery();            ResultSetMetaData rm = rs.getMetaData();            int cont = rm.getColumnCount();            while (rs.next()) {                Map<String, Object> mp = new HashMap<String, Object>();                for (int c = 1; c <= cont; c++) {                    Object o = rs.getObject(c);                    mp.put(rm.getColumnName(c), o == null ? "" : o);                }                lm.add(mp);            }        } catch (SQLException e) {            e.printStackTrace();        }        finally {            if (rs!=null) try {rs.close();}catch (Exception ex) {}            if (ps!=null) try {ps.close();}catch (Exception ex) {}            if (con!=null) try {con.close();}catch (Exception ex) {}        }        return lm;    }    /**     * 保存和修改和删除     * @param sql     * @param lo     * @return     */    public int saveorupdate(String sql, Object[] lo) {        int p = 0;        Connection con = null;        PreparedStatement ps =null;        try {            con = datasource.getConnection();            ps = con.prepareStatement(sql);            if (lo != null) {                for (int i = 1; i <= lo.length; i++) {                    ps.setObject(i, lo[i - 1]);                }            }            p = ps.executeUpdate();        } catch (SQLException e) {            e.printStackTrace();        }        finally {            if (ps!=null) try {ps.close();}catch (Exception ex) {}            if (con!=null) try {con.close();}catch (Exception ex) {}        }        return p;    }    /**     * 获取分页数据     * @param sqlmodel 查询模型     * @return     */    public static List<Map<String, Object>> GetPageList(Model.Sql_PageList sqlmodel) {        List<Map<String, Object>> lm = new ArrayList<Map<String, Object>>();        Connection con = null;        ResultSet rs = null;        CallableStatement Callstmt=null;        try {            con = datasource.getConnection();            Callstmt = con.prepareCall("{call PageList(?,?,?,?,?,?,?,?)}");            Callstmt.setString("_fields", sqlmodel.getStrFieldShow());            Callstmt.setString("_tables", sqlmodel.getStrTableName());            Callstmt.setString("_where", sqlmodel.getStrWhere());            Callstmt.setString("_orderby", sqlmodel.getStrFieldOrder());            Callstmt.setInt("_pageindex", sqlmodel.getPageCurrent());            Callstmt.setInt("_pagesize", sqlmodel.getPageSize());            Callstmt.registerOutParameter("_totalcount",java.sql.Types.INTEGER);            Callstmt.registerOutParameter("_pagecount",java.sql.Types.INTEGER);            Callstmt.executeQuery();            rs = Callstmt.executeQuery();            int totalcount = Callstmt.getInt("_totalcount");            int pagecount = Callstmt.getInt("_pagecount");            sqlmodel.setInfoCount(totalcount);            sqlmodel.setPageCount(pagecount);            ResultSetMetaData rm = rs.getMetaData();            int cont = rm.getColumnCount();            while (rs.next()) {                Map<String, Object> mp = new HashMap<String, Object>();                for (int c = 1; c <= cont; c++) {                    Object o = rs.getObject(c);                    mp.put(rm.getColumnName(c), o == null ? "" : o);                }                lm.add(mp);            }        } catch (Exception e) {            e.printStackTrace();        } finally {            if (rs!=null) try {rs.close();}catch (Exception ex) {}            if (Callstmt!=null) try {Callstmt.close();}catch (Exception ex) {}            if (con!=null) try {con.close();}catch (Exception ex) {}        }        return lm;    }}