java - 在 Java 上连接的 Oracle 数据库中执行存储过程

Question

我在 Oracle 数据库中有一个这样的存储过程:

CREATE OR REPLACE PROCEDURE PSTATISTIC
AS
BEGIN
  UPDATE PLACE_STATISTIC
  SET POPULARITY = 0;

  UPDATE PLACE_STATISTIC
  SET POPULARITY = POPULARITY + 1
  WHERE PLACE_ID IN (SELECT PLACE_COMMENT.PLACE_ID
                    FROM PLACE_COMMENT);

END PSTATISTIC;

当我在 SQL Developer 上调用它时:

执行 PSTATISTIC

正常执行，更新了PLACE_STATISTIC表

但是当我尝试在 Java 上使用它时:

String sql="EXECUTE HR.PSTATISTIC";
Statement statement=(Statement)connectionDB.createStatement();
statement.execute(sql);

它在 Java 上没有成功，引用了一些错误:

java.sql.SQLSyntaxErrorException: ORA-00900: invalid SQL statement

    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521)
    at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:194)
    at oracle.jdbc.driver.T4CStatement.executeForRows(T4CStatement.java:1000)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1307)
    at oracle.jdbc.driver.OracleStatement.executeInternal(OracleStatement.java:1882)
    at oracle.jdbc.driver.OracleStatement.execute(OracleStatement.java:1847)
    at oracle.jdbc.driver.OracleStatementWrapper.execute(OracleStatementWrapper.java:301)

如何在 Java 上执行我的 PSTATISTIC 过程？我授予了所有必要的权限

Answer 1

要从 Java 代码执行存储过程，您需要使用 CallableStatement。语句不能用于执行存储过程。

Connection con = getConnection();
    CallableStatement cs = null;
    try {
        cs = con.prepareCall("{call EXECUTE PSTATISTIC}");
        cs.execute();


    } catch (SQLException e) {
        System.err.println("SQLException: " + e.getMessage());
    }
    finally {
        if (cs != null) {
            try {
                cs.close();
            } catch (SQLException e) {
                System.err.println("SQLException: " + e.getMessage());
            }
        }
        if (con != null) {
            try {
                con.close();
            } catch (SQLException e) {
                System.err.println("SQLException: " + e.getMessage());
            }
        }
    }
}