在java中获取pl/sql数组返回值 [英] Fetch pl/sql array return values in java

问题描述

在 Java 中如何从返回数组的 pl/sql 函数中获取值.

In Java how to get values from a pl/sql function which returns an array.

如果我的 pl/sql 函数返回名为 myArray 的数组，在 java 中是否可以获取值使用 callablestatement?

if my pl/sql function returns array called myArray, in java is it possible to fetch values from myArray into java objects using callablestatement?

谢谢

更新 1

我正在调用函数的 Java 代码，但出现异常.

My Java code where I am calling function, but I am getting exception.

PLS-00306: wrong number or types of arguments in call to 'myfunc'




connection = con.getConnection();
        callablestatement = connection.prepareCall("{call myfunc(?,?,?}");
        callablestatement.setInt(1, param1);
        callablestatement.setInt(2, param2);
        callablestatement.setString(3, param3);
        callablestatement.registerOutParameter(4, Types.ARRAY);
        callablestatement.execute();        
        resultSet = callablestatement.getArray(4).getResultSet();

更新 2

private final String PRODECURE_NAME = "{? = call myfunc(?,?,?)}";

和

connection = con.getConnection();
    callablestatement = connection.prepareCall(PRODECURE_NAME);
    callablestatement.registerOutParameter(1, Types.ARRAY);
    callablestatement.setInt(2, param1);
    callablestatement.setInt(3, param2);
    callablestatement.setString(4, param3);

    callablestatement.execute();

create or replace type dates
       is varray(100) of varchar2(32);

功能

CREATE OR REPLACE function myfunc (    
    p_id    IN number,
    p_c_id     IN number,
    p_co_no     IN number

)
    RETURN dates
AS
    myarray contract_dates;
    par1        VARCHAR2 (32);
    par2        VARCHAR2 (32);

固定更新 3

connection = con.getConnection();
        callablestatement = 
                connection.prepareCall("begin ? :=myfunc(?,?,?); end;");
        callablestatement.registerOutParameter(1, OracleTypes.ARRAY, "DATES");
        callablestatement.setInt(2, param1);
        callablestatement.setInt(3, param2);
        callablestatement.setString(4, param3);
        callablestatement.execute();

推荐答案

我没有用 ARRAY 这样做，但它应该可以工作.首先，您必须注册函数的 out 参数.所以它可以是这样的.

I didn't do that with ARRAY but it should works. First you must register out parameter of your function. So it can be like this.

private final String PRODECURE_NAME = "{? = call <ProcedureName>(?,?,?)}";

Connection con = null;
CallableStatement cs = null;

       try {
            con = DAOFactory.getDatabaseConnection();
            cs = con.prepareCall(PRODECURE_NAME);
            cs.registerOutParameter(1, java.sql.Types.ARRAY);
            cs.setYourType(2, <yourData>);
            cs.setYourType(3, <yourData>);
            cs.setYourType(4, <yourData>);
            cs.execute();
            Array arr = cs.getArray(1);
            if (arr != null) {
               String[] data = (String[]) arr.getArray();
            }
        } 
        catch (SQLException ex) {
            Logger.getLogger(OracleLiekDAO.class.getName()).log(Level.SEVERE, null, ex);
            try {
                con.rollback();
            }
        }
        finally {
            if (con != null) {
                try {
                    con.close();
                } 
                catch (SQLException ex) {
                    Logger.getLogger(OracleLiekDAO.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }

试试这个人，然后给我答案，不管它行不行.

Try this man and give me then asnwer wether it do or not.

这些字符 ? 代表您将设置的一个参数(它被命名为参数化).所以这个:

These char ? represents one parameter that you will set(it's named as parametrized). So this:

cs.setYourType(2, <yourData>);
cs.setYourType(3, <yourData>);
cs.setYourType(4, <yourData>);

意味着，您设置了三个参数 (?)，方法的第一个参数是列索引，第二个是您特定类型的数据.

means, that you set your three parameters (?), first parameter of method is column index and second are you data of your specific type.

编辑 2:

很抱歉我写了不好的解决方案，已经更新，所以现在检查代码并尝试它.

So sorry i wrote bad solution, already updated so check code now and try it.

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