原生Java操作mysql数据库过程解析

这篇文章主要介绍了原生Java操作mysql数据库过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

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

<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>

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.java

import 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name
String 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);
 }

来源：https://www.cnblogs.com/zhouheblog/p/11044375.html