当涉及到将Oracle数据库字段类型映射为MySQL数据库字段类型时,考虑到不同数据库的差异和复杂性,以下是一个更全面的映射示例,涵盖了更多的Oracle字段类型及其可能的MySQL对应类型。
import java.util.HashMap; import java.util.Map; public class OracleToMySQLTypeConverter { private static Map<String, String> typeMapping; static { typeMapping = new HashMap<>(); typeMapping.put("NUMBER", "DECIMAL"); typeMapping.put("VARCHAR2", "VARCHAR"); typeMapping.put("CHAR", "CHAR"); typeMapping.put("NCHAR", "CHAR"); typeMapping.put("NVARCHAR2", "VARCHAR"); typeMapping.put("DATE", "DATE"); typeMapping.put("TIMESTAMP", "DATETIME"); typeMapping.put("CLOB", "TEXT"); typeMapping.put("NCLOB", "TEXT"); typeMapping.put("BLOB", "BLOB"); typeMapping.put("BINARY_DOUBLE", "DOUBLE"); typeMapping.put("BINARY_FLOAT", "FLOAT"); typeMapping.put("RAW", "BINARY"); typeMapping.put("LONG RAW", "BLOB"); typeMapping.put("LONG", "TEXT"); typeMapping.put("FLOAT", "FLOAT"); typeMapping.put("REAL", "REAL"); typeMapping.put("INTEGER", "INT"); typeMapping.put("SMALLINT", "SMALLINT"); typeMapping.put("NUMERIC", "NUMERIC"); typeMapping.put("BOOLEAN", "BOOLEAN"); typeMapping.put("VARCHAR", "VARCHAR"); typeMapping.put("NVARCHAR", "VARCHAR"); typeMapping.put("VARCHAR2", "VARCHAR"); typeMapping.put("NCHAR", "CHAR"); typeMapping.put("CHAR", "CHAR"); typeMapping.put("LONGVARCHAR", "TEXT"); typeMapping.put("BINARY", "BINARY"); typeMapping.put("VARBINARY", "VARBINARY"); typeMapping.put("LONGVARBINARY", "BLOB"); typeMapping.put("BLOB", "BLOB"); typeMapping.put("CLOB", "TEXT"); typeMapping.put("NCLOB", "TEXT"); typeMapping.put("ROWID", "VARCHAR"); // 添加其他类型映射 } public static String convertType(String oracleType) { String mysqlType = typeMapping.get(oracleType); return mysqlType != null ? mysqlType : "UNKNOWN"; } public static void main(String[] args) { String oracleFieldType = "NUMBER"; String mysqlFieldType = convertType(oracleFieldType); System.out.println("Oracle Field Type: " + oracleFieldType); System.out.println("MySQL Field Type: " + mysqlFieldType); } }
在这个示例中,我添加了更多的类型映射,涵盖了更多的数据类型,包括BOOLEAN
、NUMERIC
、VARBINARY
、LONGVARBINARY
等等。请注意,这只是一个简化的映射,实际情况可能更加复杂。
在实际应用中,你可能还需要考虑类型长度、精度、约束、默认值等方面的映射。如果你的应用需要更全面和精确的类型映射,建议仔细研究Oracle和MySQL数据库的官方文档,以及相关的数据库迁移工具。
标签:Java,String,创建,数据源,TEXT,BLOB,typeMapping,put,VARCHAR From: https://www.cnblogs.com/wanglichaoya/p/17601962.html