java程序调用存储过程和存储函数

java程序调用存储过程

jdbcUtil.java文件

package cn.itcast.oracle.utils;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCUtils {

private static String driver = "oracle.jdbc.OracleDriver";
private static String url = "jdbc:oracle:thin:@192.168.56.101:1521:orcl";
private static String user = "scott";
private static String password = "tiger";

static{
try {
Class.forName(driver);
} catch (ClassNotFoundException e) {
throw new ExceptionInInitializerError(e);
}
}

public static Connection getConnection(){
try {
return DriverManager.getConnection(url, user, password);
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}

/*
* 执行java程序
* java -Xms100m -Xmx200m HelloWorld
*
* 技术方向
* 1. 性能调优
* 2. 故障诊断: ThreadDump
*/
public static void release(Connection conn,Statement st,ResultSet rs){
if(rs != null){
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}finally{
rs = null;   //----> Java GC
}
}
if(st != null){
try {
st.close();
} catch (SQLException e) {
e.printStackTrace();
}finally{
st = null;
}
}
if(conn != null){
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}finally{
conn = null;
}
}
}
}

package cn.itcast.oracle.demo;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.ResultSet;

import oracle.jdbc.OracleCallableStatement;
import oracle.jdbc.OracleTypes;

import org.junit.Test;

import cn.itcast.oracle.utils.JDBCUtils;

public class TestOracle {
/*调用存储过程

* create or replace procedure queryEmpInfo(eno in number,
pename out varchar2,
psal   out number,
pjob   out varchar2)
*/
@Test
public void testProcedure(){
//{call <procedure-name>[(<arg1>,<arg2>, ...)]}
String sql = "{call queryEmpInfo(?,?,?,?)}";
Connection conn = null;
CallableStatement call = null;
try {
conn = JDBCUtils.getConnection();
call = conn.prepareCall(sql);

//对于in参数，赋值
call.setInt(1, 7839);

//对于out参数，申明
call.registerOutParameter(2, OracleTypes.VARCHAR);
call.registerOutParameter(3, OracleTypes.NUMBER);
call.registerOutParameter(4, OracleTypes.VARCHAR);

//执行
call.execute();

//取出结果
String name = call.getString(2);
double sal = call.getDouble(3);
String job = call.getString(4);
System.out.println(name+"\t"+sal+"\t"+job);
} catch (Exception e) {
e.printStackTrace();
}finally{
JDBCUtils.release(conn, call, null);
}
}

/*调用存储函数

* create or replace function queryEmpIncome(eno in number)
return number
*/
@Test
public void testFunction(){
//{?= call <procedure-name>[(<arg1>,<arg2>, ...)]}
String sql = "{?=call queryEmpIncome(?)}";

Connection conn = null;
CallableStatement call = null;
try {
conn = JDBCUtils.getConnection();
call = conn.prepareCall(sql);

//对于out参数，申明
call.registerOutParameter(1, OracleTypes.NUMBER);

//对于in参数，赋值
call.setInt(2, 7839);

//执行
call.execute();

//取出结果
double income = call.getDouble(1);
System.out.println(income);
} catch (Exception e) {
e.printStackTrace();
}finally{
JDBCUtils.release(conn, call, null);
}
}

@Test
public void testCursor(){
String sql = "{call MYPACKAGE.queryEmpList(?,?)}";

Connection conn = null;
CallableStatement call = null;
ResultSet rs = null;
try {
conn = JDBCUtils.getConnection();
call = conn.prepareCall(sql);

call.setInt(1, 20);
call.registerOutParameter(2, OracleTypes.CURSOR);
call.execute();

//取出集合
rs = ((OracleCallableStatement)call).getCursor(2);
while(rs.next()){
String name = rs.getString("ename");
double sal = rs.getDouble("sal");
System.out.println(name+"\t"+sal);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
JDBCUtils.release(conn, call, rs);
}
}