內(nèi)容或簡介：
/**
調(diào)用數(shù)據(jù)庫里的一個(gè)函數(shù)
一個(gè)函數(shù)本質(zhì)上一個(gè)返回一個(gè)結(jié)果的存儲(chǔ)過程，這個(gè)例子示范了怎么調(diào)用有in、out和in/out參數(shù)的函數(shù)
***********************************/
CallableStatement cs;
try {
// 調(diào)用一個(gè)沒有參數(shù)的函數(shù); 函數(shù)返回 a VARCHAR
// 預(yù)處理callable語句 
    cs = connection.prepareCall("{? = call myfunc}");

// 注冊(cè)返回值類型
    cs.registerOutParameter(1, i);

// Execute and retrieve the returned value
    cs.execute();
    String retValue = cs.getString(1);

// 調(diào)用有一個(gè)in參數(shù)的函數(shù); the function returns a VARCHAR
    cs = connection.prepareCall("{? = call myfuncin(?)}");

// Register the type of the return value
    cs.registerOutParameter(1, Types.VARCHAR);

// Set the value for the IN parameter
    cs.setString(2, "a string");

// Execute and retrieve the returned value
    cs.execute();
    retValue = cs.getString(1);

// 調(diào)用有一個(gè)out參數(shù)的函數(shù); the function returns a VARCHAR
    cs = connection.prepareCall("{? = call myfuncout(?)}");

// Register the types of the return value and OUT parameter
    cs.registerOutParameter(1, Types.VARCHAR);
    cs.registerOutParameter(2, Types.VARCHAR);

// Execute and retrieve the returned values
    cs.execute();
    retValue = cs.getString(1);           // return value
    String outParam = cs.getString(2);    // OUT parameter

// 調(diào)用有一個(gè)in/out參數(shù)的函數(shù); the function returns a VARCHAR
    cs = connection.prepareCall("{? = call myfuncinout(?)}");

// Register the types of the return value and OUT parameter
    cs.registerOutParameter(1, Types.VARCHAR);
    cs.registerOutParameter(2, Types.VARCHAR);

// Set the value for the IN/OUT parameter
    cs.setString(2, "a string");

// Execute and retrieve the returned values
    cs.execute();
    retValue = cs.getString(1);           // return value
    outParam = cs.getString(2);           // IN/OUT parameter
} catch (SQLException e) {
}