Java調(diào)用Oracle的過程和函數(shù)
2024-08-29 13:33:08
供稿：網(wǎng)友
內(nèi)容或簡(jiǎn)介：
/**
調(diào)用數(shù)據(jù)庫(kù)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) {
}
