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原生Java操作mysql數(shù)據(jù)庫(kù)過(guò)程解析

更新時(shí)間：2019年11月28日 11:25:30 作者：農(nóng)名工進(jìn)城

這篇文章主要介紹了原生Java操作mysql數(shù)據(jù)庫(kù)過(guò)程解析,文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友可以參考下

1.引入數(shù)據(jù)庫(kù)驅(qū)動(dòng)的jar包以通過(guò)maven引入mysql driver為例

1.1 到http://mvnrepository.com 搜索 mysql

1.2 復(fù)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.創(chuàng)建數(shù)據(jù)庫(kù)連接類(lèi)DBUtil.java用以連接與關(guān)閉數(shù)據(jù)庫(kù)

//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【數(shù)據(jù)庫(kù)地址】:3306【端口】/【數(shù)據(jù)庫(kù)名稱(chēng)】?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代碼中對(duì)表進(jìn)行操作

3.1 查，刪，改類(lèi)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 {
   // 關(guān)閉自動(dòng)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 {
    // 事務(wù)回滾
    conn.rollback();
   } catch (SQLException e1) {
    e1.printStackTrace();
   }
   e.printStackTrace();
  } finally {
   DBUtil.closeJDBC(null, pstmt, conn);
  }

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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