jdbc目前支持4種類型的驅動模式
參考如下圖，我們需要開發的是type4 100%純java代碼的，以下只是簡單的原型，實現一個比較完整的jdbc驅動，后續會逐步完成 
項目結構
當前沒有依賴任何三方包，對於包含了依賴的，對於驅動的如果使用maven項目推薦使用maven-shade-plugin 插件，盡管這樣開發的驅動
比較大，但是可靠性以及穩定性比較好（減少依賴包沖突）
- maven 項目結構
├── pom.xml
└── src
├── main
│ ├── java
│ │ └── com
│ │ └── dalong
│ │ └── jdbc
│ │ ├── MyConnection.java
│ │ ├── MyDatabaseMetaData.java
│ │ └── MyDriver.java
│ └── resources
│ └── META-INF
│ └── services
│ └── java.sql.Driver
└── test
└── java
- 簡單說明
resources/META-INF/services/java.sql.Driver 這個文件是jdbc驅動開發的一個約定（spi），內容很簡單(指定我們驅動的完整類名就可以了)
com.dalong.jdbc.MyDriver
pom.xml 這個很簡單，沒有什么特殊的，后期開發其他依賴的時候可能就需要擴展了
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.dalong</groupId>
<artifactId>myjdbc</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<encoding>UTF-8</encoding>
<java.version>1.8</java.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
</project>
MyDriver.java driver 接口的實現，一個通用的模式
package com.dalong.jdbc;
import java.io.Closeable;
import java.io.IOException;
import java.sql.*;
import java.util.Properties;
import java.util.logging.Logger;
/**
@author dalong
mydemo jdbc driver for http tet
*/
public class MyDriver implements Driver, Closeable {
static final String DRIVER_NAME = "my JDBC Driver";
static final String DRIVER_VERSION;
static final int DRIVER_VERSION_MAJOR;
static final int DRIVER_VERSION_MINOR;
private static final String DRIVER_URL_START = "jdbc:myapp:";
static {
// 我們通過靜態構造函數注冊我們的驅動，如果了解golang 的sql 驅動的話，也是一樣的，支持golang 基於了 init 函數進行驅動的注冊
try {
DRIVER_VERSION_MAJOR= 3;
DRIVER_VERSION_MINOR =1;
DRIVER_VERSION = "1.0.0";
MyDriver driver = new MyDriver();
DriverManager.registerDriver(driver);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
@Override
public void close() throws IOException {
// http connect demo
}
// implements connect manage connect
@Override
public Connection connect(String url, Properties info) throws SQLException {
// first check url is validate
if (acceptsURL(url)){
return new MyConnection(url,info);
}
return null;
}
@Override
public boolean acceptsURL(String url) throws SQLException {
return url.startsWith(DRIVER_URL_START);
}
@Override
public DriverPropertyInfo[] getPropertyInfo(String url, Properties info) throws SQLException {
return new DriverPropertyInfo[0];
}
@Override
public int getMajorVersion() {
return DRIVER_VERSION_MAJOR;
}
@Override
public int getMinorVersion() {
return DRIVER_VERSION_MINOR;
}
@Override
public boolean jdbcCompliant() {
return false;
}
@Override
public Logger getParentLogger() throws SQLFeatureNotSupportedException {
return null;
}
}
MyConnection.java 我們所有的操作都是基於connection 的,此代碼比較簡單，沒有添加特殊的東西，主要是關於
DatabaseMetaData的返回（方便嘗試的，后邊繼續完整）
package com.dalong.jdbc;
import java.sql.*;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
/**
@author dalong
實現一個jdbc connection 包裝 http 請求
*/
public class MyConnection implements Connection {
// atomic operators
MyConnection(String url,Properties properties) {
}
@Override
public Statement createStatement() throws SQLException {
return null;
}
@Override
public PreparedStatement prepareStatement(String sql) throws SQLException {
return null;
}
@Override
public CallableStatement prepareCall(String sql) throws SQLException {
return null;
}
@Override
public String nativeSQL(String sql) throws SQLException {
// 輸出原始sql
return sql;
}
// 事務支持
@Override
public void setAutoCommit(boolean autoCommit) throws SQLException {
}
@Override
public boolean getAutoCommit() throws SQLException {
return false;
}
@Override
public void commit() throws SQLException {
}
@Override
public void rollback() throws SQLException {
}
@Override
public void close() throws SQLException {
}
@Override
public boolean isClosed() throws SQLException {
return false;
}
// 返回元數據信息，通過自己實現的MyDatabaseMetaData 完成部分
@Override
public DatabaseMetaData getMetaData() throws SQLException {
// 可以通過約定獲取
return new MyDatabaseMetaData();
}
@Override
public void setReadOnly(boolean readOnly) throws SQLException {
}
@Override
public boolean isReadOnly() throws SQLException {
return true;
}
@Override
public void setCatalog(String catalog) throws SQLException {
}
@Override
public String getCatalog() throws SQLException {
return null;
}
@Override
public void setTransactionIsolation(int level) throws SQLException {
}
@Override
public int getTransactionIsolation() throws SQLException {
return 0;
}
@Override
public SQLWarning getWarnings() throws SQLException {
return null;
}
@Override
public void clearWarnings() throws SQLException {
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
return null;
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
return null;
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
return null;
}
@Override
public Map<String, Class<?>> getTypeMap() throws SQLException {
return null;
}
@Override
public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
}
@Override
public void setHoldability(int holdability) throws SQLException {
}
@Override
public int getHoldability() throws SQLException {
return 0;
}
@Override
public Savepoint setSavepoint() throws SQLException {
return null;
}
@Override
public Savepoint setSavepoint(String name) throws SQLException {
return null;
}
@Override
public void rollback(Savepoint savepoint) throws SQLException {
}
@Override
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return null;
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return null;
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return null;
}
@Override
public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
return null;
}
@Override
public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
return null;
}
@Override
public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
return null;
}
@Override
public Clob createClob() throws SQLException {
return null;
}
@Override
public Blob createBlob() throws SQLException {
return null;
}
@Override
public NClob createNClob() throws SQLException {
return null;
}
@Override
public SQLXML createSQLXML() throws SQLException {
return null;
}
@Override
public boolean isValid(int timeout) throws SQLException {
return false;
}
@Override
public void setClientInfo(String name, String value) throws SQLClientInfoException {
}
@Override
public void setClientInfo(Properties properties) throws SQLClientInfoException {
}
@Override
public String getClientInfo(String name) throws SQLException {
return null;
}
@Override
public Properties getClientInfo() throws SQLException {
return null;
}
@Override
public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
return null;
}
@Override
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
return null;
}
@Override
public void setSchema(String schema) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public String getSchema() throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void abort(Executor executor) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
}
@Override
public int getNetworkTimeout() throws SQLException {
return 0;
}
@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
return null;
}
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
return false;
}
}
MyDatabaseMetaData.java 元數據暴露的,代碼很簡單，主要是提供了用戶在連接的時候提示信息
package com.dalong.jdbc;
import java.sql.*;
/**
* @author dalong
*/
public class MyDatabaseMetaData implements DatabaseMetaData {
@Override
public boolean allProceduresAreCallable() throws SQLException {
return false;
}
@Override
public boolean allTablesAreSelectable() throws SQLException {
return false;
}
@Override
public String getURL() throws SQLException {
return null;
}
@Override
public String getUserName() throws SQLException {
return null;
}
@Override
public boolean isReadOnly() throws SQLException {
return false;
}
@Override
public boolean nullsAreSortedHigh() throws SQLException {
return false;
}
@Override
public boolean nullsAreSortedLow() throws SQLException {
return false;
}
@Override
public boolean nullsAreSortedAtStart() throws SQLException {
return false;
}
@Override
public boolean nullsAreSortedAtEnd() throws SQLException {
return false;
}
@Override
public String getDatabaseProductName() throws SQLException {
return "my server 1.0.0";
}
@Override
public String getDatabaseProductVersion() throws SQLException {
return "my server 1.0.0";
}
@Override
public String getDriverName() throws SQLException {
return "myjdbc for my server";
}
@Override
public String getDriverVersion() throws SQLException {
return "1.0.0";
}
@Override
public int getDriverMajorVersion() {
return MyDriver.DRIVER_VERSION_MAJOR;
}
@Override
public int getDriverMinorVersion() {
return MyDriver.DRIVER_VERSION_MINOR;
}
@Override
public boolean usesLocalFiles() throws SQLException {
return false;
}
@Override
public boolean usesLocalFilePerTable() throws SQLException {
return false;
}
@Override
public boolean supportsMixedCaseIdentifiers() throws SQLException {
return false;
}
@Override
public boolean storesUpperCaseIdentifiers() throws SQLException {
return false;
}
@Override
public boolean storesLowerCaseIdentifiers() throws SQLException {
return false;
}
@Override
public boolean storesMixedCaseIdentifiers() throws SQLException {
return false;
}
@Override
public boolean supportsMixedCaseQuotedIdentifiers() throws SQLException {
return false;
}
@Override
public boolean storesUpperCaseQuotedIdentifiers() throws SQLException {
return false;
}
@Override
public boolean storesLowerCaseQuotedIdentifiers() throws SQLException {
return false;
}
@Override
public boolean storesMixedCaseQuotedIdentifiers() throws SQLException {
return false;
}
@Override
public String getIdentifierQuoteString() throws SQLException {
return null;
}
@Override
public String getSQLKeywords() throws SQLException {
return null;
}
@Override
public String getNumericFunctions() throws SQLException {
return null;
}
@Override
public String getStringFunctions() throws SQLException {
return null;
}
@Override
public String getSystemFunctions() throws SQLException {
return null;
}
@Override
public String getTimeDateFunctions() throws SQLException {
return null;
}
@Override
public String getSearchStringEscape() throws SQLException {
return null;
}
@Override
public String getExtraNameCharacters() throws SQLException {
return null;
}
@Override
public boolean supportsAlterTableWithAddColumn() throws SQLException {
return false;
}
@Override
public boolean supportsAlterTableWithDropColumn() throws SQLException {
return false;
}
@Override
public boolean supportsColumnAliasing() throws SQLException {
return false;
}
@Override
public boolean nullPlusNonNullIsNull() throws SQLException {
return false;
}
@Override
public boolean supportsConvert() throws SQLException {
return false;
}
@Override
public boolean supportsConvert(int fromType, int toType) throws SQLException {
return false;
}
@Override
public boolean supportsTableCorrelationNames() throws SQLException {
return false;
}
@Override
public boolean supportsDifferentTableCorrelationNames() throws SQLException {
return false;
}
@Override
public boolean supportsExpressionsInOrderBy() throws SQLException {
return false;
}
@Override
public boolean supportsOrderByUnrelated() throws SQLException {
return false;
}
@Override
public boolean supportsGroupBy() throws SQLException {
return false;
}
@Override
public boolean supportsGroupByUnrelated() throws SQLException {
return false;
}
@Override
public boolean supportsGroupByBeyondSelect() throws SQLException {
return false;
}
@Override
public boolean supportsLikeEscapeClause() throws SQLException {
return false;
}
@Override
public boolean supportsMultipleResultSets() throws SQLException {
return false;
}
@Override
public boolean supportsMultipleTransactions() throws SQLException {
return false;
}
@Override
public boolean supportsNonNullableColumns() throws SQLException {
return false;
}
@Override
public boolean supportsMinimumSQLGrammar() throws SQLException {
return false;
}
@Override
public boolean supportsCoreSQLGrammar() throws SQLException {
return false;
}
@Override
public boolean supportsExtendedSQLGrammar() throws SQLException {
return false;
}
@Override
public boolean supportsANSI92EntryLevelSQL() throws SQLException {
return false;
}
@Override
public boolean supportsANSI92IntermediateSQL() throws SQLException {
return false;
}
@Override
public boolean supportsANSI92FullSQL() throws SQLException {
return false;
}
@Override
public boolean supportsIntegrityEnhancementFacility() throws SQLException {
return false;
}
@Override
public boolean supportsOuterJoins() throws SQLException {
return false;
}
@Override
public boolean supportsFullOuterJoins() throws SQLException {
return false;
}
@Override
public boolean supportsLimitedOuterJoins() throws SQLException {
return false;
}
@Override
public String getSchemaTerm() throws SQLException {
return null;
}
@Override
public String getProcedureTerm() throws SQLException {
return null;
}
@Override
public String getCatalogTerm() throws SQLException {
return null;
}
@Override
public boolean isCatalogAtStart() throws SQLException {
return false;
}
@Override
public String getCatalogSeparator() throws SQLException {
return null;
}
@Override
public boolean supportsSchemasInDataManipulation() throws SQLException {
return false;
}
@Override
public boolean supportsSchemasInProcedureCalls() throws SQLException {
return false;
}
@Override
public boolean supportsSchemasInTableDefinitions() throws SQLException {
return false;
}
@Override
public boolean supportsSchemasInIndexDefinitions() throws SQLException {
return false;
}
@Override
public boolean supportsSchemasInPrivilegeDefinitions() throws SQLException {
return false;
}
@Override
public boolean supportsCatalogsInDataManipulation() throws SQLException {
return false;
}
@Override
public boolean supportsCatalogsInProcedureCalls() throws SQLException {
return false;
}
@Override
public boolean supportsCatalogsInTableDefinitions() throws SQLException {
return false;
}
@Override
public boolean supportsCatalogsInIndexDefinitions() throws SQLException {
return false;
}
@Override
public boolean supportsCatalogsInPrivilegeDefinitions() throws SQLException {
return false;
}
@Override
public boolean supportsPositionedDelete() throws SQLException {
return false;
}
@Override
public boolean supportsPositionedUpdate() throws SQLException {
return false;
}
@Override
public boolean supportsSelectForUpdate() throws SQLException {
return false;
}
@Override
public boolean supportsStoredProcedures() throws SQLException {
return false;
}
@Override
public boolean supportsSubqueriesInComparisons() throws SQLException {
return false;
}
@Override
public boolean supportsSubqueriesInExists() throws SQLException {
return false;
}
@Override
public boolean supportsSubqueriesInIns() throws SQLException {
return false;
}
@Override
public boolean supportsSubqueriesInQuantifieds() throws SQLException {
return false;
}
@Override
public boolean supportsCorrelatedSubqueries() throws SQLException {
return false;
}
@Override
public boolean supportsUnion() throws SQLException {
return false;
}
@Override
public boolean supportsUnionAll() throws SQLException {
return false;
}
@Override
public boolean supportsOpenCursorsAcrossCommit() throws SQLException {
return false;
}
@Override
public boolean supportsOpenCursorsAcrossRollback() throws SQLException {
return false;
}
@Override
public boolean supportsOpenStatementsAcrossCommit() throws SQLException {
return false;
}
@Override
public boolean supportsOpenStatementsAcrossRollback() throws SQLException {
return false;
}
@Override
public int getMaxBinaryLiteralLength() throws SQLException {
return 0;
}
@Override
public int getMaxCharLiteralLength() throws SQLException {
return 0;
}
@Override
public int getMaxColumnNameLength() throws SQLException {
return 0;
}
@Override
public int getMaxColumnsInGroupBy() throws SQLException {
return 0;
}
@Override
public int getMaxColumnsInIndex() throws SQLException {
return 0;
}
@Override
public int getMaxColumnsInOrderBy() throws SQLException {
return 0;
}
@Override
public int getMaxColumnsInSelect() throws SQLException {
return 0;
}
@Override
public int getMaxColumnsInTable() throws SQLException {
return 0;
}
@Override
public int getMaxConnections() throws SQLException {
return 0;
}
@Override
public int getMaxCursorNameLength() throws SQLException {
return 0;
}
@Override
public int getMaxIndexLength() throws SQLException {
return 0;
}
@Override
public int getMaxSchemaNameLength() throws SQLException {
return 0;
}
@Override
public int getMaxProcedureNameLength() throws SQLException {
return 0;
}
@Override
public int getMaxCatalogNameLength() throws SQLException {
return 0;
}
@Override
public int getMaxRowSize() throws SQLException {
return 0;
}
@Override
public boolean doesMaxRowSizeIncludeBlobs() throws SQLException {
return false;
}
@Override
public int getMaxStatementLength() throws SQLException {
return 0;
}
@Override
public int getMaxStatements() throws SQLException {
return 0;
}
@Override
public int getMaxTableNameLength() throws SQLException {
return 0;
}
@Override
public int getMaxTablesInSelect() throws SQLException {
return 0;
}
@Override
public int getMaxUserNameLength() throws SQLException {
return 0;
}
@Override
public int getDefaultTransactionIsolation() throws SQLException {
return 0;
}
@Override
public boolean supportsTransactions() throws SQLException {
return false;
}
@Override
public boolean supportsTransactionIsolationLevel(int level) throws SQLException {
return false;
}
@Override
public boolean supportsDataDefinitionAndDataManipulationTransactions() throws SQLException {
return false;
}
@Override
public boolean supportsDataManipulationTransactionsOnly() throws SQLException {
return false;
}
@Override
public boolean dataDefinitionCausesTransactionCommit() throws SQLException {
return false;
}
@Override
public boolean dataDefinitionIgnoredInTransactions() throws SQLException {
return false;
}
@Override
public ResultSet getProcedures(String catalog, String schemaPattern, String procedureNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getProcedureColumns(String catalog, String schemaPattern, String procedureNamePattern, String columnNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types) throws SQLException {
return null;
}
@Override
public ResultSet getSchemas() throws SQLException {
return null;
}
@Override
public ResultSet getCatalogs() throws SQLException {
return null;
}
@Override
public ResultSet getTableTypes() throws SQLException {
return null;
}
@Override
public ResultSet getColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getColumnPrivileges(String catalog, String schema, String table, String columnNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getTablePrivileges(String catalog, String schemaPattern, String tableNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getBestRowIdentifier(String catalog, String schema, String table, int scope, boolean nullable) throws SQLException {
return null;
}
@Override
public ResultSet getVersionColumns(String catalog, String schema, String table) throws SQLException {
return null;
}
@Override
public ResultSet getPrimaryKeys(String catalog, String schema, String table) throws SQLException {
return null;
}
@Override
public ResultSet getImportedKeys(String catalog, String schema, String table) throws SQLException {
return null;
}
@Override
public ResultSet getExportedKeys(String catalog, String schema, String table) throws SQLException {
return null;
}
@Override
public ResultSet getCrossReference(String parentCatalog, String parentSchema, String parentTable, String foreignCatalog, String foreignSchema, String foreignTable) throws SQLException {
return null;
}
@Override
public ResultSet getTypeInfo() throws SQLException {
return null;
}
@Override
public ResultSet getIndexInfo(String catalog, String schema, String table, boolean unique, boolean approximate) throws SQLException {
return null;
}
@Override
public boolean supportsResultSetType(int type) throws SQLException {
return false;
}
@Override
public boolean supportsResultSetConcurrency(int type, int concurrency) throws SQLException {
return false;
}
@Override
public boolean ownUpdatesAreVisible(int type) throws SQLException {
return false;
}
@Override
public boolean ownDeletesAreVisible(int type) throws SQLException {
return false;
}
@Override
public boolean ownInsertsAreVisible(int type) throws SQLException {
return false;
}
@Override
public boolean othersUpdatesAreVisible(int type) throws SQLException {
return false;
}
@Override
public boolean othersDeletesAreVisible(int type) throws SQLException {
return false;
}
@Override
public boolean othersInsertsAreVisible(int type) throws SQLException {
return false;
}
@Override
public boolean updatesAreDetected(int type) throws SQLException {
return false;
}
@Override
public boolean deletesAreDetected(int type) throws SQLException {
return false;
}
@Override
public boolean insertsAreDetected(int type) throws SQLException {
return false;
}
@Override
public boolean supportsBatchUpdates() throws SQLException {
return false;
}
@Override
public ResultSet getUDTs(String catalog, String schemaPattern, String typeNamePattern, int[] types) throws SQLException {
return null;
}
@Override
public Connection getConnection() throws SQLException {
return null;
}
@Override
public boolean supportsSavepoints() throws SQLException {
return false;
}
@Override
public boolean supportsNamedParameters() throws SQLException {
return false;
}
@Override
public boolean supportsMultipleOpenResults() throws SQLException {
return false;
}
@Override
public boolean supportsGetGeneratedKeys() throws SQLException {
return false;
}
@Override
public ResultSet getSuperTypes(String catalog, String schemaPattern, String typeNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getSuperTables(String catalog, String schemaPattern, String tableNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getAttributes(String catalog, String schemaPattern, String typeNamePattern, String attributeNamePattern) throws SQLException {
return null;
}
@Override
public boolean supportsResultSetHoldability(int holdability) throws SQLException {
return false;
}
@Override
public int getResultSetHoldability() throws SQLException {
return 0;
}
@Override
public int getDatabaseMajorVersion() throws SQLException {
return 0;
}
@Override
public int getDatabaseMinorVersion() throws SQLException {
return 0;
}
@Override
public int getJDBCMajorVersion() throws SQLException {
return 0;
}
@Override
public int getJDBCMinorVersion() throws SQLException {
return 0;
}
@Override
public int getSQLStateType() throws SQLException {
return 0;
}
@Override
public boolean locatorsUpdateCopy() throws SQLException {
return false;
}
@Override
public boolean supportsStatementPooling() throws SQLException {
return false;
}
@Override
public RowIdLifetime getRowIdLifetime() throws SQLException {
return null;
}
@Override
public ResultSet getSchemas(String catalog, String schemaPattern) throws SQLException {
return null;
}
@Override
public boolean supportsStoredFunctionsUsingCallSyntax() throws SQLException {
return false;
}
@Override
public boolean autoCommitFailureClosesAllResultSets() throws SQLException {
return false;
}
@Override
public ResultSet getClientInfoProperties() throws SQLException {
return null;
}
@Override
public ResultSet getFunctions(String catalog, String schemaPattern, String functionNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getFunctionColumns(String catalog, String schemaPattern, String functionNamePattern, String columnNamePattern) throws SQLException {
return null;
}
@Override
public ResultSet getPseudoColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern) throws SQLException {
return null;
}
@Override
public boolean generatedKeyAlwaysReturned() throws SQLException {
return false;
}
@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
return null;
}
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
return false;
}
}
連接試用
很簡單，我們基於dbeaver 配置我們自己開發的驅動進行連接
- 構建jar包
mvn clean package
- 添加新的dbeaver驅動配置
- 使用自己的驅動進行連接測試
說明
以上代碼很簡單，主要是關於jdbc驅動開發的基本原型的說明，后邊我們基於此開發一個http請求處理的jdbc驅動,如果經常看一些
開源項目的話，應該會發現開源項目的額jdbc驅動開發的模式也是按照這個套路的，有些是封裝的底層協議，有些封裝的是http協議
參考資料
https://github.com/prestodb/presto/tree/master/presto-jdbc
https://github.com/h2database/h2database/blob/master/h2/src/main/org/h2/Driver.java