如何看idea连接mysql数据库（IDEA 链接Mysql数据库并执行查询操作的完整代码）
时间：2021-10-03 01:32:31 类别：数据库 浏览量：520
如何看idea连接mysql数据库
IDEA 链接Mysql数据库并执行查询操作的完整代码1、先写个 Mysql 的链接设置页面
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package com.wretchant.fredis.menu.mysql;import com.intellij.notification.NotificationType;import com.intellij.openapi.actionSystem.AnAction;import com.intellij.openapi.actionSystem.AnActionEvent;import com.wretchant.fredis.gui.dialog.TableDialog;import com.wretchant.fredis.util.NotifyUtils;import com.wretchant.fredis.util.PropertiesUtils;import org.jetbrains.annotations.NotNull;import javax.swing.*;import java.util.Map;import java.util.Properties;/** * @author Created by 谭健 on 2020/8/26. 星期三. 15:24. * © All Rights Reserved. */public class MysqlConfig extends AnAction { @Override public void actionPerformed(@NotNull AnActionEvent event) { Properties properties = PropertiesUtils.readFromSystem(); if (properties != null) { TableDialog.TableField build = TableDialog.TableField.build(properties.stringPropertyNames()); TableDialog dialog = new TableDialog("Mysql 连接配置", build); for (int i = 0; i < dialog.getLabels().size(); i++) { JLabel label = dialog.getLabels().get(i); JTextField textField = dialog.getInputs().get(i); String property = properties.getProperty(label.getText()); textField.setText(property); } dialog.show(); if (dialog.isOK()) { Map<String, String> valueMap = dialog.getValueMap(); valueMap.forEach(properties::setProperty); PropertiesUtils.write2System(properties); } } else { NotifyUtils.notifyUser(event.getProject(), "读取配置文件失败，配置文件不存在", NotificationType.ERROR); } }} |
2、然后简单的写个 JDBC 操作数据库的支持类
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package com.wretchant.fredis.support;import cn.hutool.core.util.StrUtil;import com.intellij.notification.NotificationType;import com.intellij.openapi.actionSystem.AnActionEvent;import com.intellij.openapi.actionSystem.PlatformDataKeys;import com.intellij.openapi.editor.SelectionModel;import com.wretchant.fredis.util.ClipboardUtils;import com.wretchant.fredis.util.NotifyUtils;import com.wretchant.fredis.util.PropertiesUtils;import com.wretchant.fredis.value.StringValue;import org.apache.commons.lang.StringUtils;import org.jetbrains.annotations.NotNull;import java.sql.*;import java.util.*;/** * @author Created by 谭健 on 2020/8/12. 星期三. 17:42. * © All Rights Reserved. */public class Mysql { /** * 执行查询语句的返回结果 */ public static class Rs { public Rs(List<Map<String, Object>> r) { this.r = r; this.count = r.size(); } private List<Map<String, Object>> r = new ArrayList<>(); private int count; public List<Map<String, Object>> getR() { return r; } public void setR(List<Map<String, Object>> r) { this.r = r; } public int getCount() { return count; } public void setCount(int count) { this.count = count; } public Map<String, Object> one() { if (Objects.isNull(r) || r.isEmpty()) { return null; } return r.get(0); } public Object oneGet(String key) { return one().get(key); } } // 参考： https://www.cnblogs.com/jyroy/p/9637149.html public static class JDBCUtil { /** * 执行sql 并返回 map 数据 * * @param sql * @return */ public static Rs rs(String sql) { Connection connection = null; Statement statement = null; ResultSet resultSet = null; List<Map<String, Object>> r = new ArrayList<>(); try { connection = Mysql.DatabaseUtils.getConnection(); statement = connection.createStatement(); resultSet = statement.executeQuery(sql); // 基础信息 ResultSetMetaData metaData = resultSet.getMetaData(); // 返回了多少个字段 int columnCount = metaData.getColumnCount(); while (resultSet.next()) { Map<String, Object> valueMap = new LinkedHashMap<>(); for (int i = 0; i < columnCount; i++) { // 这个字段是什么数据类型 String columnClassName = metaData.getColumnClassName(i); // 字段名称 String columnName = metaData.getColumnName(i); Object value = resultSet.getObject(columnName); valueMap.put(columnName, value); } r.add(valueMap); } } catch (Exception e1) { NotifyUtils.notifyUser(null, "error", NotificationType.ERROR); e1.printStackTrace(); } finally { release(connection, statement, resultSet); } return new Rs(r); } public static ResultSet es(String sql) { Connection connection; Statement statement; ResultSet resultSet = null; try { connection = Mysql.DatabaseUtils.getConnection(); statement = connection.createStatement(); resultSet = statement.executeQuery(sql); } catch (Exception e1) { NotifyUtils.notifyUser(null, "error", NotificationType.ERROR); e1.printStackTrace(); } return resultSet; } public static void release(Connection connection, Statement st, ResultSet rs) { closeConn(connection); closeRs(rs); closeSt(st); } public static void closeRs(ResultSet rs) { try { if (rs != null) { rs.close(); } } catch (SQLException e) { e.printStackTrace(); } finally { rs = null; } } private static void closeSt(Statement st) { try { if (st != null) { st.close(); } } catch (SQLException e) { e.printStackTrace(); } finally { st = null; &n
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