//调用存储过程带参
CallableStatement ca = conn.prepareCall("{call Login (?,?)}");
ca.setString(1,username);
ca.setString(2,password);
ca.execute();
//调用存储过程带返回参数的
CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
ca.setString(1,username);
ca.setString(2,password);
ca.registerOutParameter(3,java.sql.Types.INTEGER);
ca.execute();
int returnOut = ca.getInt(3);
//调用存储过程带返回值的return
CallableStatement ca = conn.prepareCall("{?=call Login (?,?,?)}");
ca.setString(2,username);
ca.setString(3,password);
ca.registerOutParameter(1,java.sql.Types.INTEGER);
ca.execute();
int returnOut = ca.getInt(1);
//调用存储过程返回两个结果集
CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
ca.setString(1,username);
ca.setString(2,password);
ca.execute();
这段时间开始学习写存储过程,主要原因还是因为工作需要吧,本来以为很简单的,但几经挫折,豪气消磨殆尽,但总算搞通了,为了避免后来者少走弯路,特记述与此,同时亦对自己进行鼓励。
一:无返回值的存储过程
存储过程为:
CREATE OR REPLACE PROCEDURE TESTA(PARA1 IN VARCHAR2,PARA2 IN VARCHAR2) AS
BEGIN
INSERT INTO HYQ.B_ID (I_ID,I_NAME) VALUES (PARA1, PARA2);
END TESTA;
然后呢,在java里调用时就用下面的代码:
package com.hyq.src;
import java.sql.*;
import java.sql.ResultSet;
public class TestProcedureOne {
public TestProcedureOne() {
}
public static void main(String[] args ){
String driver = "oracle.jdbc.driver.OracleDriver";
String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521: hyq ";
Statement stmt = null;
ResultSet rs = null;
Connection conn = null;
CallableStatement cstmt = null;
try {
Class.forName(driver);
conn = DriverManager.getConnection(strUrl, " hyq ", " hyq ");
CallableStatement proc = null;
proc = conn.prepareCall("{ call HYQ.TESTA(?,?) }");
proc.setString(1, "100");
proc.setString(2, "TestOne");
proc.execute();
}
catch (SQLException ex2) {
ex2.printStackTrace();
}
catch (Exception ex2) {
ex2.printStackTrace();
}
finally{
try {
if(rs != null){
rs.close();
if(stmt!=null){
stmt.close();
}
if(conn!=null){
conn.close();
}
}
}
catch (SQLException ex1) {
}
}
}
}
当然了,这就先要求要建张表TESTTB,里面两个字段(I_ID,I_NAME)。
二:有返回值的存储过程(非列表)
存储过程为:
CREATE OR REPLACE PROCEDURE TESTB(PARA1 IN VARCHAR2,PARA2 OUT VARCHAR2) AS
BEGIN
SELECT INTO PARA2 FROM TESTTB WHERE I_ID= PARA1;
END TESTB;
在java里调用时就用下面的代码:
package com.hyq.src;
public class TestProcedureTWO {
public TestProcedureTWO() {
}
public static void main(String[] args ){
String driver = "oracle.jdbc.driver.OracleDriver";
String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq";
Statement stmt = null;
ResultSet rs = null;
Connection conn = null;
try {
Class.forName(driver);
conn = DriverManager.getConnection(strUrl, " hyq ", " hyq ");
CallableStatement proc = null;
proc = conn.prepareCall("{ call HYQ.TESTB(?,?) }");
proc.setString(1, "100");
proc.registerOutParameter(2, Types.VARCHAR);
proc.execute();
String testPrint = proc.getString(2);
System.out.println("=testPrint=is="+testPrint);
}
catch (SQLException ex2) {
ex2.printStackTrace();
}
catch (Exception ex2) {
ex2.printStackTrace();
}
finally{
try {
if(rs != null){
rs.close();
if(stmt!=null){
stmt.close();
}
if(conn!=null){
conn.close();
}
}
}
catch (SQLException ex1) {
}
}
}
}
}
注意,这里的proc.getString(2)中的数值2并非任意的,而是和存储过程中的out列对应的,如果out是在第一个位置,那就是proc.getString(1),如果是第三个位置,就是proc.getString(3),当然也可以同时有多个返回值,那就是再多加几个out参数了。
三:返回列表
由于oracle存储过程没有返回值,它的所有返回值都是通过out参数来替代的,列表同样也不例外,但由于是集合,所以不能用一般的参数,必须要用pagkage了.所以要分两部分,
1, 建一个程序包。如下:
CREATE OR REPLACE PACKAGE TESTPACKAGE AS
TYPE Test_CURSOR IS REF CURSOR;
end TESTPACKAGE;
2,建立存储过程,存储过程为:
CREATE OR REPLACE PROCEDURE TESTC(p_CURSOR out TESTPACKAGE.Test_CURSOR) IS
BEGIN
OPEN p_CURSOR FOR SELECT * FROM HYQ.TESTTB;
END TESTC;
可以看到,它是把游标(可以理解为一个指针),作为一个out 参数来返回值的。
在java里调用时就用下面的代码:
package com.hyq.src;
import java.sql.*;
import java.io.OutputStream;
import java.io.Writer;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import oracle.jdbc.driver.*;
public class TestProcedureTHREE {
public TestProcedureTHREE() {
}
public static void main(String[] args ){
String driver = "oracle.jdbc.driver.OracleDriver";
String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq";
Statement stmt = null;
ResultSet rs = null;
Connection conn = null;
try {
Class.forName(driver);
conn = DriverManager.getConnection(strUrl, "hyq", "hyq");
CallableStatement proc = null;
proc = conn.prepareCall("{ call hyq.testc(?) }");
proc.registerOutParameter(1,oracle.jdbc.OracleTypes.CURSOR);
proc.execute();
rs = (ResultSet)proc.getObject(1);
while(rs.next())
{
System.out.println("<tr><td>" + rs.getString(1) + "</td><td>"+rs.getString(2)+"</td></tr>");
}
}
catch (SQLException ex2) {
ex2.printStackTrace();
}
catch (Exception ex2) {
ex2.printStackTrace();
}
finally{
try {
if(rs != null){
rs.close();
if(stmt!=null){
stmt.close();
}
if(conn!=null){
conn.close();
}
}
}
catch (SQLException ex1) {
}
}
}
}
ResultSet rs = ca.getResultSet();
while(rs.next())
{
System.out.println(rs.getInt(1)+rs.getString(2));
}
if(ca.getMoreResults())
{
rs = ca.getResultSet();
while (rs.next()) {
System.out.println(rs.getInt(1) + rs.getString(2));
}