使用预言机对象参数调用预言机存储过程

Question

我将oracle和ojdbc版本从11.1.0.2升级到12.1.0.2。我想将预言机对象类型的array作为预言机procedure的参数。此过程在预言机端需要 2 个varchar2参数。例如，我将 3 个对象作为键值对数组发送，Oracle 接受这些对象。我的问题是调用我的过程时(varchar2类型的(参数为空。

这是我尝试过的代码。

OracleConnection oraconn = conn.unwrap(OracleConnection.class);
Struct[] paramStructArray = new Struct[3];
paramStructArray[0] = oraconn.createStruct("KEY_VALUE_ENTRY",new Object[]{"key1","value1"});
paramStructArray[1] = oraconn.createStruct("KEY_VALUE_ENTRY",new Object[]{"key2","value2"});
paramStructArray[2] = oraconn.createStruct("KEY_VALUE_ENTRY",new Object[]{"key3","value3"});
Array array = oraconn.createOracleArray("KEY_VALUE_MAP", paramStructArray);
CallableStatement cstmt = getStatement(Statement.REGISTER_REQUEST);
cstmt.setString(1, requestId);
cstmt.setArray(2, array);
cstmt.execute();

这是我的java代码，这也是我的oracle objects

CREATE OR REPLACE TYPE "KEY_VALUE_ENTRY"  AS
OBJECT (
  key VARCHAR2(32),
  val VARCHAR2(2048)
);

CREATE OR REPLACE TYPE "KEY_VALUE_MAP"    AS
TABLE OF key_value_entry;

和我的程序

PROCEDURE register_request_(p_request_id IN varchar2
                             ,p_params     IN key_value_map) AS
  BEGIN
    IF p_params IS NOT NULL THEN
      INSERT INTO test_table
        (request, NAME, VALUE)
        SELECT test_seq.nextval
              ,t.key
              ,t.val
          FROM TABLE(CAST(p_params AS key_value_map)) t;
      COMMIT;
  END IF;
  EXCEPTION
    WHEN OTHERS THEN
      RAISE;
  END;

我在 oracle 端获取 3 个KEY_VALUE_ENTRY类型对象，但此对象的 key 和val字段均为空。我无法弄清楚我做错了什么。

Answer 1

存在Encoding问题，java给出并oracle接受此值，在我的classpath中添加orai18n.jar后，一切正常

Answer 2

我尝试了这段代码，它按预期工作，无需将 orai18n.jar 添加到类路径。我保持数据库方法不变。

public void insertTable(List<KeyValueObj> list, Connection conn)
            throws SQLException {
        String str = "{call Test_schema.Test_pkg.Register_Request(?,?)}";
        OracleCallableStatement statement = null;
        OracleConnection oraConn = null;
        String requestId = "111";
        try{
            oraConn = conn.unwrap(OracleConnection.class);
            statement = (OracleCallableStatement) oraConn.prepareCall(str);
            statement.setObject(2, getOracleRowObjectList(list, oraConn));
            statement.setString(1,requestId);
            statement.execute();
        }finally {
            try {
                statement.close();
                } catch (Exception e) {
            }
        }
    }
     private Array getOracleRowObjectList(List<KeyValueObj> list, OracleConnection conn) throws SQLException{
        String type = "Test_schema.KEY_VALUE_MAP";
        Struct[] structList = new Struct[list.size()];
        for(int i=0;i<list.size();i++){
            structList[i] = getOracleRowObject(conn, list.get(i));
        }
        return conn.createOracleArray(type, structList);
    }

    private Struct getOracleRowObject(OracleConnection conn, KeyValueObj obj) throws SQLException{
        String typeRow = "Test_schema.KEY_VALUE_ENTRY";
        return conn.createStruct(typeRow,
                new Object[]{ obj.getKey(),
                              obj.getValue(),
        });
    }

键值Obj类

public class KeyValueObj {
    private String key;
    private String value;
    public KeyValueObj(String key, String value) {
        super();
        this.key = key;
        this.value = value;
    }
    public String getKey() {
        return key;
    }
    public void setKey(String key) {
        this.key = key;
    }
    public String getValue() {
        return value;
    }
    public void setValue(String value) {
        this.value = value;
    }   
}

希望这能帮助面临同样问题的人。