Spring Boot 和SQLite

o4tp2gmn 于 2023-03-13 发布在 SQLite

关注(0)|答案(3)|浏览(175)

我正在尝试使用SQLite与一个Sping Boot 应用程序。我知道在Spring Boot的真棒支持，例如MongoDB。但我找不到一种方法来使用Spring Boot与SQLite？任何建议，从哪里或如何开始使用Spring Boot和SQLite？

sqlite

来源：https://stackoverflow.com/questions/24232892/spring-boot-and-sqlite

3条答案

按热度按时间

xbp102n01#

Boot 不能在SQLite中开箱即用（例如，它在H2、HSQL或ApacheDerby中也是如此--我建议您使用其中的任何一种来代替SQLite）。
首先你需要覆盖数据源来指定你的SQLite数据源。在你的配置中使用下面的代码（使用Sping Boot 1.1.0.M2中引入的DataSourceBuilder）

@Bean
public DataSource dataSource() {
        DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create();
        dataSourceBuilder.driverClassName("org.sqlite.JDBC");
        dataSourceBuilder.url("jdbc:sqlite:your.db");
        return dataSourceBuilder.build();   
}

然后您需要创建一个SQLiteDialect，因为Hibernate还没有（基于here中的代码，但适用于Hibernate 4）

package your.package

import java.sql.Types;

import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.Hibernate;
import org.hibernate.type.StringType;

public class SQLiteDialect extends Dialect {
    public SQLiteDialect() {
        registerColumnType(Types.BIT, "integer");
        registerColumnType(Types.TINYINT, "tinyint");
        registerColumnType(Types.SMALLINT, "smallint");
        registerColumnType(Types.INTEGER, "integer");
        registerColumnType(Types.BIGINT, "bigint");
        registerColumnType(Types.FLOAT, "float");
        registerColumnType(Types.REAL, "real");
        registerColumnType(Types.DOUBLE, "double");
        registerColumnType(Types.NUMERIC, "numeric");
        registerColumnType(Types.DECIMAL, "decimal");
        registerColumnType(Types.CHAR, "char");
        registerColumnType(Types.VARCHAR, "varchar");
        registerColumnType(Types.LONGVARCHAR, "longvarchar");
        registerColumnType(Types.DATE, "date");
        registerColumnType(Types.TIME, "time");
        registerColumnType(Types.TIMESTAMP, "timestamp");
        registerColumnType(Types.BINARY, "blob");
        registerColumnType(Types.VARBINARY, "blob");
        registerColumnType(Types.LONGVARBINARY, "blob");
        // registerColumnType(Types.NULL, "null");
        registerColumnType(Types.BLOB, "blob");
        registerColumnType(Types.CLOB, "clob");
        registerColumnType(Types.BOOLEAN, "integer");

        registerFunction( "concat", new VarArgsSQLFunction(StringType.INSTANCE, "", "||", "") );
        registerFunction( "mod", new SQLFunctionTemplate( StringType.INSTANCE, "?1 % ?2" ) );
        registerFunction( "substr", new StandardSQLFunction("substr", StringType.INSTANCE) );
        registerFunction( "substring", new StandardSQLFunction( "substr", StringType.INSTANCE) );
    }

    public boolean supportsIdentityColumns() {
        return true;
    }

  /*
  public boolean supportsInsertSelectIdentity() {
    return true; // As specify in NHibernate dialect
  }
  */

    public boolean hasDataTypeInIdentityColumn() {
        return false; // As specify in NHibernate dialect
    }

  /*
  public String appendIdentitySelectToInsert(String insertString) {
    return new StringBuffer(insertString.length()+30). // As specify in NHibernate dialect
      append(insertString).
      append("; ").append(getIdentitySelectString()).
      toString();
  }
  */

    public String getIdentityColumnString() {
        // return "integer primary key autoincrement";
        return "integer";
    }

    public String getIdentitySelectString() {
        return "select last_insert_rowid()";
    }

    public boolean supportsLimit() {
        return true;
    }

    protected String getLimitString(String query, boolean hasOffset) {
        return new StringBuffer(query.length()+20).
                append(query).
                append(hasOffset ? " limit ? offset ?" : " limit ?").
                toString();
    }

    public boolean supportsTemporaryTables() {
        return true;
    }

    public String getCreateTemporaryTableString() {
        return "create temporary table if not exists";
    }

    public boolean dropTemporaryTableAfterUse() {
        return false;
    }

    public boolean supportsCurrentTimestampSelection() {
        return true;
    }

    public boolean isCurrentTimestampSelectStringCallable() {
        return false;
    }

    public String getCurrentTimestampSelectString() {
        return "select current_timestamp";
    }

    public boolean supportsUnionAll() {
        return true;
    }

    public boolean hasAlterTable() {
        return false; // As specify in NHibernate dialect
    }

    public boolean dropConstraints() {
        return false;
    }

    public String getAddColumnString() {
        return "add column";
    }

    public String getForUpdateString() {
        return "";
    }

    public boolean supportsOuterJoinForUpdate() {
        return false;
    }

    public String getDropForeignKeyString() {
        throw new UnsupportedOperationException("No drop foreign key syntax supported by SQLiteDialect");
    }

    public String getAddForeignKeyConstraintString(String constraintName,
                                                   String[] foreignKey, String referencedTable, String[] primaryKey,
                                                   boolean referencesPrimaryKey) {
        throw new UnsupportedOperationException("No add foreign key syntax supported by SQLiteDialect");
    }

    public String getAddPrimaryKeyConstraintString(String constraintName) {
        throw new UnsupportedOperationException("No add primary key syntax supported by SQLiteDialect");
    }

    public boolean supportsIfExistsBeforeTableName() {
        return true;
    }

    public boolean supportsCascadeDelete() {
        return false;
    }
}

最后，在application.properties中覆盖以下设置

spring.jpa.database-platform=your.package.SQLiteDialect
spring.jpa.hibernate.ddl-auto=create-drop

为了让Sping Boot 通知Hibernate它应该使用上面创建的SQLiteDialect，需要第一个设置。

赞(0）回复(0）举报 2023-03-13

qvk1mo1f2#

除了@geoand提供的很好的答案之外，DataSourceBuilder还希望您的类路径上有以下类之一：

org.apache.tomcat.jdbc.pool.DataSource
com.zaxxer.hikari.HikariDataSource
org.apache.commons.dbcp.BasicDataSource

或者，您可以通过设置以下项来覆盖类搜索：dataSourceBuilder.type(org.sqlite.SQLiteDataSource.class);
否则，将导致No supported DataSource type found错误。
您可能还需要设置hibernate.dialect=your.package.SQLiteDialect

赞(0）回复(0）举报 2023-03-13

wgeznvg73#

添加依赖项：

<!-- https://mvnrepository.com/artifact/org.xerial/sqlite-jdbc -->
<dependency>
    <groupId>org.xerial</groupId>
    <artifactId>sqlite-jdbc</artifactId>
    <version>3.41.0.0</version>
</dependency>

创建类SQLDialect

package <your package>;

import org.hibernate.dialect.Dialect;

public class SQLDialect extends Dialect {
    public SQLDialect() {}

    public boolean supportsIdentityColumns() {
        return true;
    }

    public boolean hasDataTypeInIdentityColumn() {
        return false; // As specify in NHibernate dialect
    }

    public String getIdentityColumnString() {
        // return "integer primary key autoincrement";
        return "integer";
    }

    public String getIdentitySelectString() {
        return "select last_insert_rowid()";
    }

    public boolean supportsLimit() {
        return true;
    }

    protected String getLimitString(String query, boolean hasOffset) {
        return new StringBuffer(query.length() +
        20).append(query).append(hasOffset ? " limit ? offset ?" : " limit ?")
            .toString();
    }

    public boolean supportsTemporaryTables() {
        return true;
    }

    public String getCreateTemporaryTableString() {
        return "create temporary table if not exists";
    }

    public boolean dropTemporaryTableAfterUse() {
        return false;
    }

    public boolean supportsCurrentTimestampSelection() {
        return true;
    }

    public boolean isCurrentTimestampSelectStringCallable() {
        return false;
    }

    public String getCurrentTimestampSelectString() {
        return "select current_timestamp";
    }

    public boolean supportsUnionAll() {
        return true;
    }

    public boolean hasAlterTable() {
        return false; // As specify in NHibernate dialect
    }

    public boolean dropConstraints() {
        return false;
    }

    public String getAddColumnString() {
        return "add column";
    }

    public String getForUpdateString() {
        return "";
    }

    public boolean supportsOuterJoinForUpdate() {
        return false;
    }

    public String getDropForeignKeyString() {
        throw new UnsupportedOperationException("No drop foreign key syntax     
        supported by SQLiteDialect");
    }

    public String getAddForeignKeyConstraintString(String constraintName,         String[] foreignKey, String referencedTable,
                                               String[] primaryKey, boolean referencesPrimaryKey) {
        throw new UnsupportedOperationException("No add foreign key syntax supported by SQLiteDialect");
    }

    public String getAddPrimaryKeyConstraintString(String constraintName) {
        throw new UnsupportedOperationException("No add primary key syntax supported by SQLiteDialect");
    }

    public boolean supportsIfExistsBeforeTableName() {
        return true;
    }

    public boolean supportsCascadeDelete() {
        return false;
    }
}

更新application.properties:

spring.datasource.url=jdbc:sqlite:<db-name>.db
spring.datasource.driver-class-name=org.sqlite.JDBC
spring.jpa.database-platform=<package>.SQLDialect
spring.jpa.hibernate.ddl-auto=update

启动服务器，您应该能够执行数据库操作。数据库文件名.db将在根文件夹中创建。

赞(0）回复(0）举报 2023-03-13

我来回答

Spring Boot 和SQLite

3条答案

相关问题

热门标签

最新问答