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72 changes: 72 additions & 0 deletions
72
src/main/java/io/github/gk0wk/violet/database/MySQLConnectionBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| package io.github.gk0wk.violet.database; | ||
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| import java.sql.Connection; | ||
| import java.sql.DriverManager; | ||
| import java.sql.SQLException; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| public class MySQLConnectionBuilder { | ||
| private String host = "localhost"; | ||
| private int port = 3306; | ||
| private String database = null; | ||
| private String username = null; | ||
| private String password = null; | ||
| private final Map<String, String> params = new HashMap<>(); | ||
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| public MySQLConnectionBuilder host(String host) { | ||
| this.host = host; | ||
| return this; | ||
| } | ||
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| public MySQLConnectionBuilder port(int port) { | ||
| this.port = port; | ||
| return this; | ||
| } | ||
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| public MySQLConnectionBuilder database(String database) { | ||
| this.database = database; | ||
| return this; | ||
| } | ||
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| public MySQLConnectionBuilder username(String username) { | ||
| this.username = username; | ||
| return this; | ||
| } | ||
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| public MySQLConnectionBuilder password(String password) { | ||
| this.password = password; | ||
| return this; | ||
| } | ||
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| public MySQLConnectionBuilder setParam(String param, String value) { | ||
| this.params.put(param, value); | ||
| return this; | ||
| } | ||
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| public String getParam(String param) { | ||
| return this.params.get(param); | ||
| } | ||
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| public Connection build() { | ||
| try { | ||
| Class.forName("com.mysql.cj.jdbc.Driver"); // "com.mysql.jdbc.Driver" is deprecated over JDBC6. | ||
| if (!this.params.containsKey("serverTimezone")) { | ||
| this.params.put("serverTimezone", "Asia/Shanghai"); | ||
| } | ||
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| StringBuilder sb = new StringBuilder(); | ||
| sb.append("jdbc:mysql://").append(this.host).append(':').append(this.port).append('/').append(this.database); | ||
| if (!this.params.isEmpty()) { | ||
| sb.append('?'); | ||
| this.params.forEach((key, value) -> sb.append(key).append('=').append(value).append('&')); | ||
| sb.deleteCharAt(sb.length() - 1); | ||
| } | ||
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| return DriverManager.getConnection(sb.toString(), this.username, this.password); | ||
| } catch (ClassNotFoundException | SQLException e) { | ||
| e.printStackTrace(); | ||
| return null; | ||
| } | ||
| } | ||
| } |