本篇文章给大家谈谈oraclefunctionjava,以及对应的知识点,希望对各位有所帮助,不要忘了收藏本站喔。
本文目录一览:
1、如何用java获得Oracle的function返回Cursor2、求将此java代码转换成一个oracle的function方法。3、java如何调用oracle函数?4、java调用oracle函数出错 PLS-00382: 表达式类型错误5、oracle 的存储过程在java怎么调用
如何用java获得Oracle的function返回Cursor
就是通过JDBC的连接数据库,调用存储过程方式,只是需要把返回参数给标注一下。以下是在网上找的示例代码:
Class c = Class.forName(“oracle.jdbc.driver.OracleDriver”);
Connection conn = DriverManager.getConnection(“jdbc:oracle:thin:@www.easyaq.com:1521:ORCL”,”HH”,”HH”);
CallableStatement cstmt = conn.prepareCall(“{call TEST_CURSOR.TEST(?)}”);
cstmt.registerOutParameter(1,oracle.jdbc.OracleTypes.CURSOR); //输出参数需要注册
cstmt.execute();
ResultSet rs = (ResultSet)cstmt.getObject(1); //注意是getObject,没有getCursor这种方法
while(rs.next())
{
System.out.println(“id:”+rs.getInt(1)+” name:”+rs.getString(2)+” grade:”+rs.getInt(3));
}
摘抄至:
求将此java代码转换成一个oracle的function方法。
这是我之前弄得一个例子,你拿去看看能能用把
create or replace and compile java source named Test as
package com.ts.tools;
public class Test {
public String Test(){
}
public static void main(String[] args) {
System.out.println(Test(“1234567;2345678;3456789”));
}
}
/
CREATE OR REPLACE FUNCTION test() RETURN VARCHAR2
AS LANGUAGE JAVA NAME ‘com.ts.tools.Test.splitAndConcat(java.lang.String) return java.lang.String ‘;
/
java如何调用oracle函数?
调用数据库里的一个函数
一个函数本质上一个返回一个结果的存储过程,这个例子示范了怎么调用有in、out和in/out参数的函数
***********************************/
CallableStatement cs;
try {
// 调用一个没有参数的函数; 函数返回 a VARCHAR
// 预处理callable语句
cs = connection.prepareCall(“{? = call myfunc}”);
// 注册返回值类型
cs.registerOutParameter(1, i);
// Execute and retrieve the returned value
cs.execute();
String retValue = cs.getString(1);
// 调用有一个in参数的函数; 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);
// 调用有一个out参数的函数; 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
// 调用有一个in/out参数的函数; 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) {
}
java调用oracle函数出错 PLS-00382: 表达式类型错误
错误提示, 表达式类型错误。
原因与java代码无关,在oracle 函数中找错误。
调试函数,把你的 v_out打印出来,看看v_out是不是一个标准SQL.
oracle 的存储过程在java怎么调用
java下实现调用oracle的存储过程和函数
在oracle下创建一个test的账户,然后按一下步骤执行:
1.创建表:STOCK_PRICES
–创建表格
CREATE TABLE STOCK_PRICES(
RIC VARCHAR(6) PRIMARY KEY,
PRICE NUMBER(7,2),
UPDATED DATE );
2.插入测试数据:
–插入数据
INSERT INTO stock_prices values(‘1111’,1.0,SYSDATE);
INSERT INTO stock_prices values(‘1112’,2.0,SYSDATE);
INSERT INTO stock_prices values(‘1113’,3.0,SYSDATE);
INSERT INTO stock_prices values(‘1114’,4.0,SYSDATE);
3.建立一个返回游标: PKG_PUB_UTILS
–建立一个返回游标
CREATE OR REPLACE PACKAGE PKG_PUB_UTILS IS
–动态游标
TYPE REFCURSOR IS REF CURSOR;
END PKG_PUB_UTILS;
4.创建和存储过程:P_GET_PRICE
–创建存储过程
CREATE OR REPLACE PROCEDURE P_GET_PRICE
(
AN_O_RET_CODE OUT NUMBER,
AC_O_RET_MSG OUT VARCHAR2,
CUR_RET OUT PKG_PUB_UTILS.REFCURSOR,
AN_I_PRICE IN NUMBER
)
IS
BEGIN
AN_O_RET_CODE := 0;
AC_O_RET_MSG := ‘操作成功’;
OPEN CUR_RET FOR
SELECT * FROM STOCK_PRICES WHERE PRICEAN_I_PRICE;
EXCEPTION
WHEN OTHERS THEN
AN_O_RET_CODE := -1;
AC_O_RET_MSG := ‘错误代码:’ || SQLCODE || CHR(13) || ‘错误信息:’ || SQLERRM;
END P_GET_PRICE;
5.创建函数:
–创建函数:F_GET_PRICE
CREATE OR REPLACE FUNCTION F_GET_PRICE(v_price IN NUMBER)
RETURN PKG_PUB_UTILS.REFCURSOR
AS
stock_cursor PKG_PUB_UTILS.REFCURSOR;
BEGIN
OPEN stock_cursor FOR
SELECT * FROM stock_prices WHERE price v_price;
RETURN stock_cursor;
END;
6.JAVA调用存储过程返回结果集
代码示例:JDBCoracle10G_INVOKEPROCEDURE.java
import java.sql.*;
import oracle.jdbc.OracleCallableStatement;
import oracle.jdbc.OracleTypes;
/* 本例是通过调用oracle的存储过程来返回结果集:
* oracle 9i、10G 的jdbc由1个jar包组成:classes12.zip
*/
public class JDBCoracle10G_INVOKEPROCEDURE {
Connection conn = null;
Statement statement = null;
ResultSet rs = null;
CallableStatement stmt = null;
String driver;
String url;
String user;
String pwd;
String sql;
String in_price;
public JDBCoracle10G_INVOKEPROCEDURE()
{
driver = “oracle.jdbc.driver.OracleDriver”;
url = “jdbc:oracle:thin:@www.easyaq.com:1521:ORCL”;
// oracle 用户
user = “test”;
// oracle 密码
pwd = “test”;
init();
// mysid:必须为要连接机器的sid名称,否则会包以下错:
// java.sql.SQLException: Io 异常: Connection
// refused(DESCRIPTION=(TMP=)(VSNNUM=169870080)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
// 参考连接方式:
// Class.forName( “oracle.jdbc.driver.OracleDriver” );
// cn = DriverManager.getConnection(
// “jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL”, sUsr, sPwd );
}
public void init() {
System.out.println(“oracle jdbc test”);
try {
Class.forName(driver);
System.out.println(“driver is ok”);
conn = DriverManager.getConnection(url, user, pwd);
System.out.println(“conection is ok”);
statement = conn.createStatement();
// conn.setAutoCommit(false);
// 输入参数
in_price = “3.0”;
// 调用函数
stmt = conn.prepareCall(“call P_GET_PRICE(?,?,?,?)”);
stmt.registerOutParameter(1, java.sql.Types.FLOAT);
stmt.registerOutParameter(2, java.sql.Types.CHAR);
stmt.registerOutParameter(3, oracle.jdbc.OracleTypes.CURSOR);
stmt.setString(4, in_price);
stmt.executeUpdate();
int retCode = stmt.getInt(1);
String retMsg = stmt.getString(2);
if (retCode == -1) { // 如果出错时,返回错误信息
System.out.println(“报错!”);
} else {
// 取的结果集的方式一:
rs = ((OracleCallableStatement) stmt).getCursor(3);
// 取的结果集的方式二:
// rs = (ResultSet) stmt.getObject(3);
String ric;
String price;
String updated;
// 对结果进行输出
while (rs.next()) {
ric = rs.getString(1);
price = rs.getString(2);
updated = rs.getString(3);
System.out.println(“ric:” + ric + “;– price:” + price
+ “; –” + updated + “; “);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
System.out.println(“close “);
}
}
public static void main(String args[])// 自己替换[]
{
new JDBCoracle10G_INVOKEPROCEDURE();
}
}
7.开发JAVA调用函数返回结果集
代码示例:JDBCoracle10G_INVOKEFUNCTION.java
import java.sql.*;
import oracle.jdbc.OracleCallableStatement;
import oracle.jdbc.OracleTypes;
/*
/* 本例是通过调用oracle的函数来返回结果集:
* oracle 9i、10G 的jdbc由1个jar包组成:classes12.zip
*/
public class JDBCoracle10G_INVOKEFUNCTION {
Connection conn = null;
Statement statement = null;
ResultSet rs = null;
CallableStatement stmt = null;
String driver;
String url;
String user;
String pwd;
String sql;
String in_price;
public JDBCoracle10G_INVOKEFUNCTION()
{
driver = “oracle.jdbc.driver.OracleDriver”;
url = “jdbc:oracle:thin:@www.easyaq.com:1521:ORCL”;
// oracle 用户
user = “test”;
// oracle 密码
pwd = “test”;
init();
// mysid:必须为要连接机器的sid名称,否则会包以下错:
// java.sql.SQLException: Io 异常: Connection
// refused(DESCRIPTION=(TMP=)(VSNNUM=169870080)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
// 参考连接方式:
// Class.forName( “oracle.jdbc.driver.OracleDriver” );
// cn = DriverManager.getConnection(
// “jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL”, sUsr, sPwd );
}
public void init() {
System.out.println(“oracle jdbc test”);
try {
Class.forName(driver);
System.out.println(“driver is ok”);
conn = DriverManager.getConnection(url, user, pwd);
System.out.println(“conection is ok”);
statement = conn.createStatement();
// conn.setAutoCommit(false);
// 输入参数
in_price = “5.0”;
// 调用函数
stmt = conn.prepareCall(“{? = call F_GET_PRICE(?)}”);
// stmt.registerOutParameter(1, java.sql.Types.FLOAT);
// stmt.registerOutParameter(2, java.sql.Types.CHAR);
stmt.registerOutParameter(1, oracle.jdbc.OracleTypes.CURSOR);
stmt.setString(2, in_price);
stmt.executeUpdate();
// 取的结果集的方式一:
rs = ((OracleCallableStatement) stmt).getCursor(1);
// 取的结果集的方式二:
// rs = (ResultSet) stmt.getObject(1);
String ric;
String price;
String updated;
while (rs.next()) {
ric = rs.getString(1);
price = rs.getString(2);
updated = rs.getString(3);
System.out.println(“ric:” + ric + “;– price:” + price + “; –“
+ updated + “; “);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
System.out.println(“close “);
}
}
public static void main(String args[])// 自己替换[]
{
new JDBCoracle10G_INVOKEFUNCTION();
}
}
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