在一些测试项目中会用到纯粹的jdbc操作数据库，下面提供统一的方法实现。
import java.sql.CallableStatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.util.ArrayList; import java.util.HashMap; import java.util.Hashtable; import java.util.List; import java.util.Map; import java.util.UUID; import javax.naming.Context; import javax.naming.InitialContext; public class TestDatasource { final static String INITIAL_CONTEXT_FACTORY = "weblogic.jndi.WLInitialContextFactory"; final static String PROVIDER_URL = "t3://10.111.131.53:7001"; final static String JNDI = "my_jdbc"; /** * 数据库驱动类名称 */ private static final String DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; /** * 连接字符串 */ private static final String URLSTR = "jdbc:sqlserver://localhost:1433; databaseName=test"; /** * 用户名 */ private static final String USERNAME = "admin"; /** * 密码 */ private static final String USERPASSWORD = "111111"; /** * 创建CallableStatement对象 */ private CallableStatement callableStatement = null; /** * 创建数据库连接对象 */ private Connection connnection = null; /** * 创建PreparedStatement对象 */ private PreparedStatement preparedStatement = null; /** * 创建结果集对象 */ private ResultSet resultSet = null; static Context _ctx = null; static { //通过jndi Hashtable<String, String> ht = new Hashtable<String, String>(); ht.put(Context.INITIAL_CONTEXT_FACTORY, INITIAL_CONTEXT_FACTORY); ht.put(Context.PROVIDER_URL, PROVIDER_URL); try { _ctx = new InitialContext(ht); } catch (Exception e) { e.printStackTrace(); } //通过加载驱动 try { // 加载数据库驱动程序 Class.forName(DRIVER); } catch (ClassNotFoundException e) { System.out.println("加载驱动错误"); System.out.println(e.getMessage()); } } /** * 建立数据库连接 * @return 数据库连接 */ public Connection getConnectionForLoad() { try { // 获取连接 connnection = DriverManager.getConnection(URLSTR, USERNAME, USERPASSWORD); } catch (SQLException e) { System.out.println(e.getMessage()); } return connnection; } /** * * @return */ public Connection getConnection() { Context ctx = null; Connection con = null; try { ctx = _ctx; javax.sql.DataSource ds = (javax.sql.DataSource) ctx.lookup(JNDI); con = ds.getConnection(); } catch (Exception e) { } return con; } /** * insert update delete SQL语句的执行的统一方法 * @param sql SQL语句 * @param params 参数数组，若没有参数则为null * @return 受影响的行数 */ public int executeUpdate(String sql, Object[] params) { // 受影响的行数 int affectedLine = 0; try { // 获得连接 connnection = this.getConnection(); // 调用SQL preparedStatement = connnection.prepareStatement(sql); // 参数赋值 if (params != null) { for (int i = 0; i < params.length; i++) { preparedStatement.setObject(i + 1, params[i]); } } // 执行 affectedLine = preparedStatement.executeUpdate(); } catch (SQLException e) { System.out.println(e.getMessage()); } finally { // 释放资源 closeAll(); } return affectedLine; } /** * 关闭所有资源 */ private void closeAll() { // 关闭结果集对象 if (resultSet != null) { try { resultSet.close(); } catch (SQLException e) { System.out.println(e.getMessage()); } } // 关闭PreparedStatement对象 if (preparedStatement != null) { try { preparedStatement.close(); } catch (SQLException e) { System.out.println(e.getMessage()); } } // 关闭Connection 对象 if (connnection != null) { try { connnection.close(); } catch (SQLException e) { System.out.println(e.getMessage()); } } } /** * SQL 查询将查询结果直接放入ResultSet中 * @param sql SQL语句 * @param params 参数数组，若没有参数则为null * @return 结果集 */ private ResultSet executeQueryRS(String sql, Object[] params) { try { // 获得连接 connnection = this.getConnection(); // 调用SQL preparedStatement = connnection.prepareStatement(sql); // 参数赋值 if (params != null) { for (int i = 0; i < params.length; i++) { preparedStatement.setObject(i + 1, params[i]); } } // 执行 resultSet = preparedStatement.executeQuery(); } catch (SQLException e) { System.out.println(e.getMessage()); } return resultSet; } /** * 获取结果集，并将结果放在List中 * * @param sql * SQL语句 * @return List * 结果集 */ public List<Object> excuteQuery(String sql, Object[] params) { // 执行SQL获得结果集 ResultSet rs = executeQueryRS(sql, params); // 创建ResultSetMetaData对象 ResultSetMetaData rsmd = null; // 结果集列数 int columnCount = 0; try { rsmd = rs.getMetaData(); // 获得结果集列数 columnCount = rsmd.getColumnCount(); } catch (SQLException e1) { System.out.println(e1.getMessage()); } // 创建List List<Object> list = new ArrayList<Object>(); try { // 将ResultSet的结果保存到List中 while (rs.next()) { Map<String, Object> map = new HashMap<String, Object>(); for (int i = 1; i <= columnCount; i++) { map.put(rsmd.getColumnLabel(i), rs.getObject(i)); } list.add(map); } } catch (SQLException e) { System.out.println(e.getMessage()); } finally { // 关闭所有资源 closeAll(); } return list; } /** * 存储过程带有一个输出参数的方法 * @param sql 存储过程语句 * @param params 参数数组 * @param outParamPos 输出参数位置 * @param SqlType 输出参数类型 * @return 输出参数的值 */ public Object excuteQuery(String sql, Object[] params,int outParamPos, int SqlType) { Object object = null; connnection = this.getConnection(); try { // 调用存储过程 callableStatement = connnection.prepareCall(sql); // 给参数赋值 if(params != null) { for(int i = 0; i < params.length; i++) { callableStatement.setObject(i + 1, params[i]); } } // 注册输出参数 callableStatement.registerOutParameter(outParamPos, SqlType); // 执行 callableStatement.execute(); // 得到输出参数 object = callableStatement.getObject(outParamPos); } catch (SQLException e) { System.out.println(e.getMessage()); } finally { // 释放资源 closeAll(); } return object; } }