java IDEA&&NetBeans连接MySQL（附封装好的数据库代码）
文件链接（腾讯微云）：
链接：https://share.weiyun.com/pG2P7QHb 密码：py69cp
首先先将下载下来的文件解压，复制一下两个文件。
IDEA
1.在IDEA中新建一个目录
2.命名目录名为：MySQL
3.然后将刚刚复制好的文件粘贴至MySQL目录下
4.将这两个文件右键选择添加为库，然后就可以使用mysql了
NetBeans
1.右键选择库，将刚刚两个文件选择添加为jar文件
2.然后点击服务
3.右键数据库选择新建连接
4.下拉选择驱动程序为mysql
5.点击添加，将刚刚两个文件添加至驱动程序文件
6.然后配置自己的数据库属性，点击测试连接，会出现测试成功
7.然后点击下一步，完成
数据库代码
表
public class Table {
private String tablename;
private Vector<String> columename = new Vector<String>();
Table(String name,String...vec){
tablename = name;
for(int i=0;i<vec.length;i++){
columename.add(vec[i]);
}
}
/** * @return 表的列信息 */
public Vector<String> getColumename(){
return columename;
}
/** * @return 表名 */
public String getname(){
return tablename;
}
}
数据库
public class DataBase {
/** * JDBC驱动名、URL、用户名、密码 */
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String URL = "jdbc:mysql://localhost:3306/";
static final String USER = "ik";
static final String PASSWORD = "123456";
private Connection connection = null;
private Statement statement = null;
/** * database 数据库 * table 表 */
private String dataBase = null;
private Table table = null;
/** * 表存在 */
DataBase(String Dbname, Table TBname) {
try {
//注册JDBC驱动
Class.forName(JDBC_DRIVER);
//链接到数据库
dataBase = Dbname;
connection = DriverManager.getConnection(URL + Dbname, USER, PASSWORD);
//实例化statement对象
statement = connection.createStatement();
table = TBname;
} catch (Exception e) {
System.out.println("construct error!");
}
}
public void showALL() {
try {
//sql为查询语句
String sql = "SELECT * FROM " + table.getname()+";";
//resultset存储查询结果
ResultSet resultSet = statement.executeQuery(sql);
Vector<String> vec = table.getColumename();
for (int i = 0; i < vec.size(); i++) {
System.out.print(vec.get(i) + " ");
}
System.out.println();
while (resultSet.next()) {
for (int i = 0; i < vec.size(); i++) {
System.out.print(resultSet.getString(vec.get(i)) + " ");
}
System.out.println();
}
} catch (Exception e) {
System.out.println("select all error!");
}
}
/** * 得到column列value所对应的值(值为选定的几个列) */
public Vector<String> getValue(String condition,String value,String...column){
Vector<String> vecret = new Vector<String>();
try{
String sql = "SELECT "+column[0];
for(int i=1;i<column.length;i++){
sql+=","+column[i];
}
sql+=" FROM "+table.getname()+" WHERE "+condition+"='"+value+"';";
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()){
String ret="";
for(int i=0;i<column.length;i++) {
ret += resultSet.getString(column[i])+" ";
}
vecret.add(ret);
}
}
catch(Exception e){
System.out.println("getValue error!");
}
finally {
return vecret;
}
}
public Vector<String> getValue(Pair<String,String>...condValue){
Vector<String> vecret = new Vector<String>();
try{
String sql = "SELECT * ";
sql += " FROM " + table.getname() + " WHERE ";
for(int i=0;i<condValue.length;i++) {
sql+= condValue[i].getKey() + "='" + condValue[i].getValue()+"'";
if(i!=condValue.length-1){
sql+=" AND ";
}
}
sql+=";";
ResultSet resultSet = statement.executeQuery(sql);
Vector<String> tableColumn = table.getColumename();
while (resultSet.next()){
String ret="";
for(int i=0;i<tableColumn.size();i++) {
ret += resultSet.getString(tableColumn.get(i))+" ";
}
vecret.add(ret);
}
}
catch(Exception e){
System.out.println("getValue error!");
}
finally {
return vecret;
}
}
/** * 得到column列value所对应的所有值 */
public Vector<String> getValue(String condition,String value){
Vector<String> retvec = new Vector<String>();
try{
String sql = "SELECT *"+" FROM "+table.getname()+" WHERE "+condition+"='"+value+"';";
ResultSet resultSet = statement.executeQuery(sql);
while(resultSet.next()) {
String ret="";
Vector<String> vec = table.getColumename();
for (int i = 0; i < vec.size(); i++) {
ret+=resultSet.getString(vec.get(i))+" ";
}
retvec.add(ret);
}
}
catch(Exception e){
System.out.println("getValue error!");
}
return retvec;
}
public Vector<String> getAll(){
Vector<String> retvec = new Vector<String>();
try{
String sql = "SELECT * FROM "+table.getname();
ResultSet resultSet = statement.executeQuery(sql);
while(resultSet.next()) {
String ret="";
Vector<String> vec = table.getColumename();
for (int i = 0; i < vec.size(); i++) {
ret+=resultSet.getString(vec.get(i))+" ";
}
retvec.add(ret);
}
}
catch(Exception e){
System.out.println("getAll error!");
}
return retvec;
}
/** * 判断colunm列中是否有value */
public boolean isExist(Pair<String,String>...condValue){
boolean flag = false;
try{
String sql = "SELECT * ";
sql += " FROM " + table.getname() + " WHERE ";
for(int i=0;i<condValue.length;i++) {
sql+= condValue[i].getKey() + "='" + condValue[i].getValue()+"'";
if(i!=condValue.length-1){
sql+=" AND ";
}
sql+=";";
ResultSet resultSet = statement.executeQuery(sql);
if(resultSet.next()){
flag = true;
}
return flag;
}
}
catch(Exception e){
System.out.println("is exist error!");
}
finally {
return flag;
}
}
public void insertInfor(String... values) {
try {
String sql = "INSERT INTO " + table.getname() + " VALUES(";
for (int i = 0; i < values.length; i++) {
sql += "'" + values[i] + "'";
if (i != values.length - 1) {
sql += ",";
}
}
sql += ");";
System.out.println(sql);
statement.executeUpdate(sql);
} catch (Exception e) {
System.out.println("insert error!");
}
}
public void deleteInfor(Pair<String,String>...condValue) {
try{
String sql = "DELETE FROM "+table.getname()+ " WHERE ";
for(int i=0;i<condValue.length;i++) {
sql+= condValue[i].getKey() + "='" + condValue[i].getValue()+"'";
if(i!=condValue.length-1){
sql+=" AND ";
}
}
sql+=";";
statement.executeUpdate(sql);
}
catch(Exception e){
System.out.println("getValue error!");
}
}
public void changeInfor(String columnName, String newvalues, String condition) {
try {
String sql = "UPDATE " + table.getname() + " SET " + columnName + "=" + newvalues + " WHERE " + condition+";";
statement.executeUpdate(sql);
} catch (Exception e) {
System.out.println("change error!");
}
}
public void changeTable(Table tableName){
table=tableName;
}
}
参考文献
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