spring cloud 集成 sqlite

一、安装配置sqllite

下载地址：

https://download.csdn.net/download/yang1076180972/10724242

本来想免费提供，但是csdn资源上传后最少1币，好吧，方便起见我就上传到csdn上了，勿怪；

环境变量配置：

这里sqlite其实质上只是配置，非常简单，配置好环境变量后再cmd进入dos界面输入命令：sqlite3 后出现：

说明ok了，但是dos界面操作比较麻烦，需要一个打开sqlite的DB工具：

下载地址：

https://download.csdn.net/download/yang1076180972/10724297

额。。。还是一金币，勿喷；

安装成功后打开该工具：

这里有我自己创建的db文件：test.db。和sql文件：test.sql。可以尝试执行一下：

自己先创建一个db文件，然后执行一下

test.sql：

DROP TABLE IF EXISTS TEST;
CREATE TABLE TEST(
ID INTEGER PRIMARY KEY AUTOINCREMENT,
NAME TEXT NOT NULL,
DETAIL TEXT DEFAULT NULL,
AGE INT DEFAULT 18,
ADDRESS CHAR(50),
SALARY REAL
);

INSERT INTO TEST (NAME,DETAIL,AGE,ADDRESS,SALARY) VALUES('JONE','963.85',20,'ALI.COM',10000.00);
INSERT INTO TEST (NAME,DETAIL,AGE,ADDRESS,SALARY) VALUES('JACK','12345',20,'BAIDU.COM','10000.6789');


UPDATE TEST SET DETAIL = '00000' WHERE NAME='JONE';

DELETE FROM TEST WHERE NAME='JONE';

select * from test;

如果ok就：keep going...

二、IDEA配置sqlite

继续。。。

。。。

到这步完成，可在IDEA上可以看到数据，但是需要集成，那就得需要代码配置：

ok，going。。。

pom文件配置：

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

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

application.yml配置：

datasource:
      driver-class-name: org.sqlite.JDBC
      username:
      password:
      url: jdbc:sqlite:jdbc:sqlite::resource:test.db #(相对路径和带盘符的本地路
                                                     #劲)C:\xxx\test.db
jpa:
      hibernate:
      ddl-auto: update
      ddl-auto: update  # 建表策略
      show-sql: true  #显示SQL语句
      database-platform: com.hhzx.fw.updatecontrol.config.SQLiteDialect #自己配置的方言

上述配置文件中如果配置相对路劲是无法在db文件中完成事务操作的，但sql语句打印出来是没问题的，且没有任何异常，所以在这里我使用的是绝对路径；

java代码：

这里sqlite没有提供方言，需要自己用java代码设置，如下三个类：

SQLiteDialect.java

import org.hibernate.JDBCException;
import org.hibernate.ScrollMode;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.*;
import org.hibernate.dialect.identity.IdentityColumnSupport;
import org.hibernate.dialect.pagination.AbstractLimitHandler;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.LimitHelper;
import org.hibernate.dialect.unique.DefaultUniqueDelegate;
import org.hibernate.dialect.unique.UniqueDelegate;
import org.hibernate.engine.spi.RowSelection;
import org.hibernate.exception.DataException;
import org.hibernate.exception.JDBCConnectionException;
import org.hibernate.exception.LockAcquisitionException;
import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtracter;
import org.hibernate.exception.spi.ViolatedConstraintNameExtracter;
import org.hibernate.internal.util.JdbcExceptionHelper;
import org.hibernate.mapping.Column;
import org.hibernate.type.StandardBasicTypes;

import java.sql.SQLException;
import java.sql.Types;

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() {
            @Override
            protected SQLFunction resolveBothSpaceTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?1)");
            }

            @Override
            protected SQLFunction resolveBothSpaceTrimFromFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?2)");
            }

            @Override
            protected SQLFunction resolveLeadingSpaceTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "ltrim(?1)");
            }

            @Override
            protected SQLFunction resolveTrailingSpaceTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "rtrim(?1)");
            }

            @Override
            protected SQLFunction resolveBothTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?1, ?2)");
            }

            @Override
            protected SQLFunction resolveLeadingTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "ltrim(?1, ?2)");
            }

            @Override
            protected SQLFunction resolveTrailingTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "rtrim(?1, ?2)");
            }
        });
        uniqueDelegate = new SQLiteUniqueDelegate(this);
    }

    private static final SQLiteDialectIdentityColumnSupport IDENTITY_COLUMN_SUPPORT = new SQLiteDialectIdentityColumnSupport(new SQLiteDialect());

    @Override
    public IdentityColumnSupport getIdentityColumnSupport() {
        return IDENTITY_COLUMN_SUPPORT;
    }

    // limit/offset support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    private static final AbstractLimitHandler LIMIT_HANDLER = new AbstractLimitHandler() {
        @Override
        public String processSql(String sql, RowSelection selection) {
            final boolean hasOffset = LimitHelper.hasFirstRow(selection);
            return sql + (hasOffset ? " limit ? offset ?" : " limit ?");
        }

        @Override
        public boolean supportsLimit() {
            return true;
        }

        @Override
        public boolean bindLimitParametersInReverseOrder() {
            return true;
        }
    };

    @Override
    public LimitHandler getLimitHandler() {
        return LIMIT_HANDLER;
    }

    // lock acquisition support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    @Override
    public boolean supportsLockTimeouts() {        // may be http://sqlite.org/c3ref/db_mutex.html ?
        return false;
    }

    @Override
    public String getForUpdateString() {
        return "";
    }

    @Override
    public boolean supportsOuterJoinForUpdate() {
        return false;
    }

    // current timestamp support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    @Override
    public boolean supportsCurrentTimestampSelection() {
        return true;
    }

    @Override
    public boolean isCurrentTimestampSelectStringCallable() {
        return false;
    }

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

    // SQLException support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    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;

    @Override
    public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
        return new SQLExceptionConversionDelegate() {
            @Override
            public JDBCException convert(SQLException sqlException, String message, String 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 operate
                return null;
            }
        };
    }

    @Override
    public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
        return EXTRACTER;
    }

    private static final ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() {
        @Override
        protected 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;
        }
    };

    // union subclass support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    @Override
    public boolean supportsUnionAll() {
        return true;
    }

    // DDL support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    @Override
    public boolean canCreateSchema() {
        return false;
    }

    @Override
    public boolean hasAlterTable() {        // As specified in NHibernate dialect
        return false;
    }

    @Override
    public boolean dropConstraints() {
        return false;
    }

    @Override
    public boolean qualifyIndexName() {
        return false;
    }

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

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

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

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

    @Override
    public boolean supportsCommentOn() {
        return true;
    }

    @Override
    public boolean supportsIfExistsBeforeTableName() {
        return true;
    }   /* not case insensitive for unicode characters by default (ICU extension needed)	public boolean supportsCaseInsensitiveLike() {    return true;  }  */

    @Override
    public boolean doesReadCommittedCauseWritersToBlockReaders() {        // TODO Validate (WAL mode...)
        return true;
    }

    @Override
    public boolean doesRepeatableReadCauseReadersToBlockWriters() {
        return true;
    }

    @Override
    public boolean supportsTupleDistinctCounts() {
        return false;
    }

    @Override
    public int getInExpressionCountLimit() {        // Compile/runtime time option: http://sqlite.org/limits.html#max_variable_number
        return 1000;
    }

    @Override
    public UniqueDelegate getUniqueDelegate() {
        return uniqueDelegate;
    }

    private static class SQLiteUniqueDelegate extends DefaultUniqueDelegate {
        public SQLiteUniqueDelegate(Dialect dialect) {
            super(dialect);
        }

        @Override
        public String getColumnDefinitionUniquenessFragment(Column column) {
            return " unique";
        }
    }

    @Override
    public String getSelectGUIDString() {
        return "select hex(randomblob(16))";
    }

    @Override
    public ScrollMode defaultScrollMode() {
        return ScrollMode.FORWARD_ONLY;
    }
}

SQLiteDialectIdentityColumnSupport.java

import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.identity.IdentityColumnSupportImpl;

public class SQLiteDialectIdentityColumnSupport extends IdentityColumnSupportImpl {
    public SQLiteDialectIdentityColumnSupport(Dialect dialect) {
        super(dialect);
    }

    @Override
    public boolean supportsIdentityColumns() {
        return true;
    }

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

    @Override
    public boolean hasDataTypeInIdentityColumn() {        // As specified in NHibernate dialect        // FIXME true
        return false;
    }

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

    @Override
    public String getIdentitySelectString(String table, String column, int type) {
        return "select last_insert_rowid()";
    }

    @Override
    public String getIdentityColumnString(int type) {
        // return "integer primary key autoincrement";        // FIXME "autoincrement"
        return "integer";
    }

}

SQLiteMetadataBuilderInitializer.java

import org.hibernate.boot.MetadataBuilder;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.spi.MetadataBuilderInitializer;
import org.hibernate.engine.jdbc.dialect.internal.DialectResolverSet;
import org.hibernate.engine.jdbc.dialect.spi.DialectResolver;
import org.jboss.logging.Logger;

public class SQLiteMetadataBuilderInitializer implements MetadataBuilderInitializer {

    private final static Logger logger = Logger.getLogger(SQLiteMetadataBuilderInitializer.class);

    @Override
    public void contribute(MetadataBuilder metadataBuilder, StandardServiceRegistry serviceRegistry) {
        DialectResolver dialectResolver = serviceRegistry.getService(DialectResolver.class);
        if (!(dialectResolver instanceof DialectResolverSet)) {
            logger.warnf("DialectResolver '%s' 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 = (DialectResolver) info -> {
        if (info.getDatabaseName().equals("SQLite")) {
            return dialect;
        }
        return null;
    };
}

方言设置结束，接下来代码测试：

@Component
public class EntityDao {
    @PersistenceContext
    EntityManager entityManager;

    public UpdateControlCert findByMb(String name){
        String sql = "select * from test where name = "+name;
        UpdateControlCert singleResult = (Test) entityManager.createNativeQuery(sql, Test.class).getSingleResult();
        return singleResult;
    }

    @Transactional
    public void add(String name,String address){
        String sql = "insert into test (name,age) values("+name+","+address+")";
        entityManager.createNativeQuery(sql,Test.class).executeUpdate();
        entityManager.flush();
    }

    @Transactional
    @Modifying
    public void update(String name,String id){
        String sql = "update test set name = "+name+" where id="+id;
        entityManager.createNativeQuery(sql,Test.class).executeUpdate();
        entityManager.flush();
    }

    @Transactional
    @Modifying
    public void modify(String id){
        String sql = "delete from test where id="+id;
        entityManager.createNativeQuery(sql,Test.class).executeUpdate();
    }

上述代码中，这里用的是原始sql当然jpa有自己的sql查询机制，和hibernate基本一样；

如有sql执行出错（sql在预编译时没有把参数编译进去），有第二种方式：

例子：insert into test (name,address) values(?,?);

Query nativeQuery = entityManager.createNativeQuery(sql,Test.class);
nativeQuery.setParameter(1,name);nativeQuery.setParameter(2,adderss);
nativeQuery.executeUpdate();

好事多磨。。。这里基本上完成了sqlite集成，最后自己写一个测试一下，如果前面没问题，那就一切ok

如有用，请点赞，以此鼓励。如有问题和建议，抛砖迎玉，希望得到你的宝贵意见。谢谢。。。