一个简单的jdbc连接封装

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不说废话直接上程序

JDBC

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package com.ebay.api;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class OracleJDBC {
private static final String URL = "jdbc:oracle:thin:@192.168.2.20:1521:yinyuan";
private static final String USER = "eshop";
private static final String PASSWORD = "eshop";

static {
try {
Class.forName("oracle.jdbc.OracleDriver");
} catch (ClassNotFoundException e) {
System.out.println("加载Oracle数据库驱动失败！");
}
}

/**
* 获取Connection
*
* @return
* @throws SQLException
* @throws ClassNotFoundException
*/
public static Connection getConnection() throws SQLException {
Connection conn = null;
try {
conn = DriverManager.getConnection(URL, USER, PASSWORD);
} catch (SQLException e) {
System.out.println("获取数据库连接失败！");
throw e;
}
return conn;
}

/**
* 关闭ResultSet
* @param rs
*/
public static void closeResultSet(ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
System.out.println(e.getMessage());
}
}
}

/**
* 关闭Statement
* @param stmt
*/
public static void closeStatement(Statement stmt) {
if (stmt != null) {
try {
stmt.close();
}
catch (Exception e) {
System.out.println(e.getMessage());
}
}
}

/**
* 关闭ResultSet、Statement
* @param rs
* @param stmt
*/
public static void closeStatement(ResultSet rs, Statement stmt) {
closeResultSet(rs);
closeStatement(stmt);
}

/**
* 关闭PreparedStatement
* @param pstmt
* @throws SQLException
*/
public static void fastcloseStmt(PreparedStatement pstmt) throws SQLException
{
pstmt.close();
}

/**
* 关闭ResultSet、PreparedStatement
* @param rs
* @param pstmt
* @throws SQLException
*/
public static void fastcloseStmt(ResultSet rs, PreparedStatement pstmt) throws SQLException
{
rs.close();
pstmt.close();
}

/**
* 关闭ResultSet、Statement、Connection
* @param rs
* @param stmt
* @param con
*/
public static void closeConnection(ResultSet rs, Statement stmt, Connection con) {
closeResultSet(rs);
closeStatement(stmt);
closeConnection(con);
}

/**
* 关闭Statement、Connection
* @param stmt
* @param con
*/
public static void closeConnection(Statement stmt, Connection con) {
closeStatement(stmt);
closeConnection(con);
}

/**
* 关闭Connection
* @param con
*/
public static void closeConnection(Connection con) {
if (con != null) {
try {
con.close();
}
catch (Exception e) {
System.out.println(e.getMessage());
}
}
}

}

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然后调取用的一个封装，返回值是一个List<HashMap<String,Object>> 参数是SQL语句和String[]数组

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public static List<HashMap<String, String>> getObjectMap(String sql,
String[] strings) throws SQLException {
OracleJDBC jdbc = new OracleJDBC();
Connection connection = jdbc.getConnection();
Statement stm = connection.createStatement();
ResultSet rs = stm.executeQuery(sql);
List<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
while (rs.next()) {
HashMap<String, String> map = new HashMap<String, String>();
for (int i = 0; i < strings.length; i++) {
String value="";
if(rs.getString(strings[i])==null||"".equals(rs.getString(strings[i]))){
value="";
}
else{
value=rs.getString(strings[i]).toString();
}

map.put(strings[i],value);
}
list.add(map);
}
return list;

}

参数列子

String sql = "select * from db_skuandtemplet";
String[] s = { "SKU", "HTML1", "HTML2", "HTML3", "HTML4" };

其中数组种是查询出来的数据的名字

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