无法将 Weblogic 结构类型转换为 Oracle 结构类型

Question

我正在从 java 调用一个存储过程，作为输出参数，我给出一个 struct。以下代码一切正常；

conn = DriverManager.getConnection(URL,"username","password")
StructDescriptor recDescriptor =  StructDescriptor.createDescriptor("TCS_CHALLAN",conn);
CallableStatement stmt =  conn.prepareCall("{ call xx_get_challan_info(?, ?) }");
Object[] return_record_array = new Object[8];
STRUCT output_oracle_record;
stmt.setObject(1, challan_no);
stmt.registerOutParameter(2, OracleTypes.STRUCT, "TCS_CHALLAN");
output_oracle_record = ((OracleCallableStatement)stmt).getSTRUCT(2);
return_record_array = output_oracle_record.getAttributes();

当我从 weblogic server 的 datasource 获得连接时出现问题。

javax.naming.Context initialContext = new javax.naming.InitialContext();
javax.sql.DataSource dataSource = (javax.sql.DataSource)initialContext.lookup("jdbc/testApps");
conn = dataSource.getConnection();

使用上述 conn 对象，当我尝试相同的代码时出现错误

weblogic.jdbc.wrapper.Struct_oracle_sql_STRUCT cannot be cast to oracle.sql.STRUCT

Answer 1

2 种可能的解决方案：

使用java.sql.Struct代替oracle.sql.STRUCT
投出连接：

javax.naming.Context initialContext = new javax.naming.InitialContext();
javax.sql.DataSource dataSource = (javax.sql.DataSource)initialContext.lookup("java:comp/env/jdbc/MyDS");
con = dataSource.getConnection();
vendorConnection = (oracle.jdbc.OracleConnection)((weblogic.jdbc.extensions.WLConnection)con).getVendorConnection();

Answer 2

所以这是 solution.When 运行你在 weblogic 中的代码你需要做一些额外的转换。确保在类路径中包含 jar 文件。

/*Code to support Weblogic datatypes*/
  Object returnObj = stmt.getObject(2);
  if (returnObj instanceof Struct)
                output_oracle_record = (oracle.sql.STRUCT)(((weblogic.jdbc.wrapper.Struct)returnObj).unwrap(Class.forName("oracle.sql.STRUCT")));
            else
                output_oracle_record = (oracle.sql.STRUCT)returnObj;

            /*code for tomcat deployment*/
            //output_oracle_record = ((OracleCallableStatement)stmt).getSTRUCT(2);

无法将 Weblogic 结构类型转换为 Oracle 结构类型

Unable to Weblogic Struct Type to Oracle Struct Type

java

oracle

weblogic