如何解析原生Java操作mysql数据库过程
如何解析原生Java操作MySQL数据库过程，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。
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1.引入数据库驱动的jar包 以通过maven引入mysql driver为例
1.1 到http://mvnrepository.com 搜索 mysql
1.2 复制所需maven配置文件到工程的 pom.xml
2.创建数据库连接类DBUtil.java用以连接与关闭数据库
//文件名：DBUtil.javaimport java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;public class DBUtil { static String user = "root"; static String password = "root"; static String url = "jdbc:mysql://localhost【数据库地址】:3306【端口】/【数据库名称】?serverTimezone=UTC"; static { try { Class.forName("com.mysql.cj.jdbc.Driver"); } catch (ClassNotFoundException e) { e.printStackTrace(); } } public static Connection getConnection() { Connection conn = null; try { conn = DriverManager.getConnection(url, user, password); } catch (SQLException e) { e.printStackTrace(); } return conn; } public static void closeJDBC(ResultSet rs, Statement stmt, Connection conn) { if (rs != null) { try { rs.close(); } catch (SQLException e) { e.printStackTrace(); } } if (stmt != null) { try { stmt.close(); } catch (SQLException e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (SQLException e) { e.printStackTrace(); } } }}
3.在java代码中对表进行操作
3.1 查，删，改类似
//查找table表重的 id和nameString sql = "select id,name from table";Connection conn = DBUtil.getConnection();PreparedStatement pstmt = null;try { conn.setAutoCommit(false); pstmt = conn.prepareStatement(sql); ResultSet rs = pstmt.executeQuery(); json = ResultSetToJson.ResultSetToJsonArray(rs); }catch (SQLException e){ try { conn.rollback(); }catch (SQLException e1){ e1.printStackTrace(); }}finally { DBUtil.closeJDBC(null, pstmt, conn);} return json;
3.1 增
int basicinfoID = 0;String sql = "INSERT INTO tb_resume_basicinfo(" + "basicinfo_id, realname, gender, birthday, current_loc, " + "resident_loc, telephone, email, job_intension, job_experience, head_shot,applicant_id) " +"VALUES(SEQ_ITOFFER_RESUMEBASICINFO.NEXTVAL,?,?,?,?,?,?,?,?,?,?,?)";Connection conn = DBUtil.getConnection();PreparedStatement pstmt = null; try { // 关闭自动提交 conn.setAutoCommit(false); pstmt = conn.prepareStatement(sql); pstmt.setString(1, basicinfo.getRealName()); pstmt.setString(2, basicinfo.getGender()); pstmt.setTimestamp(3, basicinfo.getBirthday() == null ? null : new Timestamp(basicinfo.getBirthday().getTime())); pstmt.setString(4, basicinfo.getCurrentLoc()); pstmt.setString(5, basicinfo.getResidentLoc()); pstmt.setString(6, basicinfo.getTelephone()); pstmt.setString(7, basicinfo.getEmail()); pstmt.setString(8, basicinfo.getJobIntension()); pstmt.setString(9, basicinfo.getJobExperience()); pstmt.setString(10, basicinfo.getHeadShot()); pstmt.setInt(11, applicantID); pstmt.executeUpdate();} catch (SQLException e) { try { // 事务回滚 conn.rollback(); } catch (SQLException e1) { e1.printStackTrace(); } e.printStackTrace(); } finally { DBUtil.closeJDBC(null, pstmt, conn); }
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