jpa整合sqlLite

新建标准springboot项目

导入依赖

<dependency><groupId>org.xerial</groupId><artifactId>sqlite-jdbc</artifactId></dependency>

配置yml文件

spring:application:name: demodatasource:driver-class-name: org.sqlite.JDBCusername:password:url: jdbc:sqlite:E:\project\java_simple\db\##.db  #这里写数据库生成的路径，文件夹路径要存在jpa:database-platform: ####     #这里写SQLiteDialect的引用路径hibernate:ddl-auto: updateshow-sql: trueopen-in-view: false

sqLite的配置类

/*** @author zzs* @date 2021/9/15 15:23*/
public class SQLiteDialect extends Dialect {private final UniqueDelegate uniqueDelegate;public SQLiteDialect() {registerColumnType(Types.BIT, "boolean");//registerColumnType(Types.FLOAT, "float");//registerColumnType(Types.DOUBLE, "double");registerColumnType(Types.DECIMAL, "decimal");registerColumnType(Types.CHAR, "char");registerColumnType(Types.LONGVARCHAR, "longvarchar");registerColumnType(Types.TIMESTAMP, "datetime");registerColumnType(Types.BINARY, "blob");registerColumnType(Types.VARBINARY, "blob");registerColumnType(Types.LONGVARBINARY, "blob");registerFunction("concat", new VarArgsSQLFunction(StandardBasicTypes.STRING, "", "||", ""));registerFunction("mod", new SQLFunctionTemplate(StandardBasicTypes.INTEGER, "?1 % ?2"));registerFunction("quote", new StandardSQLFunction("quote", StandardBasicTypes.STRING));registerFunction("random", new NoArgSQLFunction("random", StandardBasicTypes.INTEGER));registerFunction("round", new StandardSQLFunction("round"));registerFunction("substr", new StandardSQLFunction("substr", StandardBasicTypes.STRING));registerFunction("trim", new AbstractAnsiTrimEmulationFunction() {@Overrideprotected SQLFunction resolveBothSpaceTrimFunction() {return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?1)");}@Overrideprotected SQLFunction resolveBothSpaceTrimFromFunction() {return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?2)");}@Overrideprotected SQLFunction resolveLeadingSpaceTrimFunction() {return new SQLFunctionTemplate(StandardBasicTypes.STRING, "ltrim(?1)");}@Overrideprotected SQLFunction resolveTrailingSpaceTrimFunction() {return new SQLFunctionTemplate(StandardBasicTypes.STRING, "rtrim(?1)");}@Overrideprotected SQLFunction resolveBothTrimFunction() {return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?1, ?2)");}@Overrideprotected SQLFunction resolveLeadingTrimFunction() {return new SQLFunctionTemplate(StandardBasicTypes.STRING, "ltrim(?1, ?2)");}@Overrideprotected SQLFunction resolveTrailingTrimFunction() {return new SQLFunctionTemplate(StandardBasicTypes.STRING, "rtrim(?1, ?2)");}});uniqueDelegate = new SQLiteUniqueDelegate(this);}private static final SQLiteDialectIdentityColumnSupport IDENTITY_COLUMN_SUPPORT = newSQLiteDialectIdentityColumnSupport();@Overridepublic IdentityColumnSupport getIdentityColumnSupport() {return IDENTITY_COLUMN_SUPPORT;}private static final AbstractLimitHandler LIMIT_HANDLER = new AbstractLimitHandler() {//limit/offset support@Overridepublic String processSql(String sql, RowSelection selection) {final boolean hasOffset = LimitHelper.hasFirstRow(selection);return sql + (hasOffset ? " limit ? offset ?" : " limit ?");}@Overridepublic boolean supportsLimit() {return true;}@Overridepublic boolean bindLimitParametersInReverseOrder() {return true;}};@Overridepublic LimitHandler getLimitHandler() {return LIMIT_HANDLER;}@Overridepublic boolean supportsLockTimeouts() {// lock acquisition supportreturn false;}@Overridepublic String getForUpdateString() {return "";}@Overridepublic boolean supportsOuterJoinForUpdate() {return false;}@Overridepublic boolean supportsCurrentTimestampSelection() {return true;}@Overridepublic boolean isCurrentTimestampSelectStringCallable() {return false;}@Overridepublic String getCurrentTimestampSelectString() {return "select current_timestamp";}private static final int SQLITE_BUSY = 5;private static final int SQLITE_LOCKED = 6;private static final int SQLITE_IOERR = 10;private static final int SQLITE_CORRUPT = 11;private static final int SQLITE_NOTFOUND = 12;private static final int SQLITE_FULL = 13;private static final int SQLITE_CANTOPEN = 14;private static final int SQLITE_PROTOCOL = 15;private static final int SQLITE_TOOBIG = 18;private static final int SQLITE_CONSTRAINT = 19;private static final int SQLITE_MISMATCH = 20;private static final int SQLITE_NOTADB = 26;@Overridepublic SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {return (sqlException, message, sql) -> {final int errorCode = JdbcExceptionHelper.extractErrorCode(sqlException) & 0xFF;if (errorCode == SQLITE_TOOBIG || errorCode == SQLITE_MISMATCH) {return new DataException(message, sqlException, sql);} else if (errorCode == SQLITE_BUSY || errorCode == SQLITE_LOCKED) {return new LockAcquisitionException(message, sqlException, sql);} else if ((errorCode >= SQLITE_IOERR && errorCode <= SQLITE_PROTOCOL) || errorCode == SQLITE_NOTADB) {return new JDBCConnectionException(message, sqlException, sql);}// returning null allows other delegates to operatereturn null;};}@Overridepublic ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {return EXTRACTER;}private static final ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() {@Overrideprotected String doExtractConstraintName(SQLException sqle) throws NumberFormatException {final int errorCode = JdbcExceptionHelper.extractErrorCode(sqle) & 0xFF;if (errorCode == SQLITE_CONSTRAINT) {return extractUsingTemplate("constraint ", " failed", sqle.getMessage());}return null;}};@Overridepublic boolean supportsUnionAll() {return true;}@Overridepublic boolean canCreateSchema() {return false;}@Overridepublic boolean hasAlterTable() {// As specified in NHibernate dialectreturn false;}@Overridepublic boolean dropConstraints() {return false;}@Overridepublic boolean qualifyIndexName() {return false;}@Overridepublic String getAddColumnString() {return "add column";}@Overridepublic String getDropForeignKeyString() {throw new UnsupportedOperationException("No drop foreign key syntax supported by SQLiteDialect");}@Overridepublic String getAddForeignKeyConstraintString(String constraintName,String[] foreignKey, String referencedTable, String[] primaryKey,boolean referencesPrimaryKey) {throw new UnsupportedOperationException("No add foreign key syntax supported by SQLiteDialect");}@Overridepublic String getAddPrimaryKeyConstraintString(String constraintName) {throw new UnsupportedOperationException("No add primary key syntax supported by SQLiteDialect");}@Overridepublic boolean supportsCommentOn() {return true;}@Overridepublic boolean supportsIfExistsBeforeTableName() {return true;}@Overridepublic boolean doesReadCommittedCauseWritersToBlockReaders() {// TODO Validate (WAL mode...)return true;}@Overridepublic boolean doesRepeatableReadCauseReadersToBlockWriters() {return true;}@Overridepublic boolean supportsTupleDistinctCounts() {return false;}@Overridepublic int getInExpressionCountLimit() {// Compile/runtime time option: http://sqlite.org/limits.html#max_variable_numberreturn 1000;}@Overridepublic UniqueDelegate getUniqueDelegate() {return uniqueDelegate;}private static class SQLiteUniqueDelegate extends DefaultUniqueDelegate {public SQLiteUniqueDelegate(Dialect dialect) {super(dialect);}@Overridepublic String getColumnDefinitionUniquenessFragment(Column column) {return " unique";}}@Overridepublic String getSelectGUIDString() {return "select hex(randomblob(16))";}@Overridepublic ScrollMode defaultScrollMode() {return ScrollMode.FORWARD_ONLY;}
}//我是分界线
/*** @author zzs* @date 2021/9/15 15:30*/
public class SQLiteDialectIdentityColumnSupport extends IdentityColumnSupportImpl {@Overridepublic boolean supportsIdentityColumns() {return true;}@Overridepublic boolean hasDataTypeInIdentityColumn() {return false;}@Overridepublic String getIdentitySelectString(String table, String column, int type) throws MappingException {return "select last_insert_rowid()";}@Overridepublic String getIdentityColumnString(int type) throws MappingException {return "integer";}
}//我是分界线
/*** @author zzs* @date 2021/9/15 16:30*/
@Slf4j
public class SQLiteMetadataBuilderInitializer implements MetadataBuilderInitializer {@Overridepublic void contribute(MetadataBuilder metadataBuilder, StandardServiceRegistry serviceRegistry) {DialectResolver dialectResolver = serviceRegistry.getService(DialectResolver.class);if (!(dialectResolver instanceof DialectResolverSet)) {log.error("DialectResolver '{}' is not an instance of DialectResolverSet, not registering SQLiteDialect",dialectResolver);return;}((DialectResolverSet) dialectResolver).addResolver(resolver);}static private final SQLiteDialect dialect = new SQLiteDialect();static private final DialectResolver resolver = info -> {if("SQLite".equals(info.getDatabaseName())) {return dialect;}return null;};
}

写到这里SqLite就基本能使用了，记得配置数据库路径与类引用路径，然后导入其他依赖。直接利用Jpa就能结合使用了。不过SQLite的时区与本地时区不同。我这边是差8小时，可以手动建表的时候进行设置或代码里面减8小时。

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jpa整合sqlLite

jpa整合sqlLite

导入依赖

配置yml文件

sqLite的配置类

写到这里SqLite就基本能使用了，记得配置数据库路径与类引用路径，然后导入其他依赖。直接利用Jpa就能结合使用了。不过SQLite的时区与本地时区不同。我这边是差8小时，可以手动建表的时候进行设置或代码里面减8小时。

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