- 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.List;
- import java.util.Map;
- /**
- * 数据库连接类
- * 说明:封装了 无参,有参,存储过程的调用
- * @author iflytek
- *
- */
- public class ConnectionDB {
- /**
- * 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=Northwind";
- /**
- * 用户名
- */
- private static final String USERNAME = "sa";
- /**
- * 密码
- */
- private static final String USERPASSWORD = "111111";
- /**
- * 创建数据库连接对象
- */
- private Connection connnection = null;
- /**
- * 创建PreparedStatement对象
- */
- private PreparedStatement preparedStatement = null;
- /**
- * 创建CallableStatement对象
- */
- private CallableStatement callableStatement = null;
- /**
- * 创建结果集对象
- */
- private ResultSet resultSet = null;
- static {
- 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 getConnection() {
- try {
- // 获取连接
- connnection = DriverManager.getConnection(URLSTR, USERNAME,
- USERPASSWORD);
- } catch (SQLException e) {
- System.out.println(e.getMessage());
- }
- return connnection;
- }
- /**
- * 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;
- }
- /**
- * 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;
- }
- /**
- * 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CallableStatement 对象
- if (callableStatement != null) {
- try {
- callableStatement.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());
- }
- }
- }
- }
---------------------------------------------------------------------------略微修改后的版本(加了返回结果集一行一列的方法)-----------------------
- 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.List;
- import java.util.Map;
- /**
- * 数据库连接类
- * 说明:封装了 无参,有参,存储过程的调用
- * @author iflytek
- *
- */
- public class ConnectionDB {
- /**
- * 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=Northwind";
- /**
- * 用户名
- */
- private static final String USERNAME = "sa";
- /**
- * 密码
- */
- private static final String USERPASSWORD = "111111";
- /**
- * 创建数据库连接对象
- */
- private Connection connnection = null;
- /**
- * 创建PreparedStatement对象
- */
- private PreparedStatement preparedStatement = null;
- /**
- * 创建CallableStatement对象
- */
- private CallableStatement callableStatement = null;
- /**
- * 创建结果集对象
- */
- private ResultSet resultSet = null;
- static {
- 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 getConnection() {
- try {
- // 获取连接
- connnection = DriverManager.getConnection(URLSTR, USERNAME,
- USERPASSWORD);
- } catch (SQLException e) {
- System.out.println(e.getMessage());
- }
- return connnection;
- }
- /**
- * 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;
- }
- /**
- * 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;
- }
- /**
- * SQL 查询将查询结果:一行一列
- * @param sql SQL语句
- * @param params 参数数组,若没有参数则为null
- * @return 结果集
- */
- public Object executeQuerySingle(String sql, Object[] params) {
- Object object = null;
- 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();
- if(resultSet.next()) {
- object = resultSet.getObject(1);
- }
- } catch (SQLException e) {
- System.out.println(e.getMessage());
- } finally {
- closeAll();
- }
- return object;
- }
- /**
- * 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;
- }
- /**
- * 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CallableStatement 对象
- if (callableStatement != null) {
- try {
- callableStatement.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());
- }
- }
- }
- }
- 原文地址:http://blog.csdn.net/haifengzhilian/article/details/7868442