Java calls Oracle stored procedure detail
- 2020-06-12 09:01:21
- OfStack
Java calls Oracle stored procedure detail
Steps:
1. Write Oracle stored procedures
2, write the database to get the connection tool class
3, write a simple application call stored procedure
Implementation:
1. Oracle Stored Procedure:
/* The test table */
create table test(
id varchar2(32),
name varchar2(32)
);
/* The stored procedure Insert data */
CREATE OR REPLACE PROCEDURE insert_procedure(
PARA1 IN VARCHAR2,
PARA2 IN VARCHAR2
) AS
BEGIN
INSERT INTO test (id, name) VALUES (PARA1, PARA2);
END insert_procedure;
/* The stored procedure Return result set */
CREATE OR REPLACE PROCEDURE select_procedure(
para_id IN VARCHAR2,
name OUT sys_refcursor /* this sys_refcursor Type in the SYS.STANDARD In the package */
) AS
BEGIN
OPEN name FOR
SELECT * FROM test WHERE id = para_id;
END;
2. JDBC tool class
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DBUtil {
public static final String DRIVER = "oracle.jdbc.driver.OracleDriver";
public static final String URL = "jdbc:oracle:thin:@localhost:1521/orcl";
public static final String USERNAME = "pfm";
public static final String PASSWORD = "pfm";
/**
* Through static code blocks Register database driver
*/
static {
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
/**
* To obtain Connection
*
* @return
*/
public static Connection getConnection() {
Connection conn = null;
try {
conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
/**
* To obtain Statement
*
* @return
*/
public static Statement getStatement() {
Statement st = null;
try {
st = getConnection().createStatement();
} catch (SQLException e) {
e.printStackTrace();
}
return st;
}
/**
* Shut down ResultSet
*
* @param rs
*/
public static void closeResultSet(ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
/**
* Shut down Statement
*
* @param st
*/
public static void closeStatement(Statement st) {
if (st != null) {
try {
st.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
/**
* Shut down Connection
*
* @param conn
*/
public static void closeConnection(Connection conn) {
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
/**
* Close all
*
* @param rs
* @param sta
* @param conn
*/
public static void closeAll(ResultSet rs, Statement sta, Connection conn) {
closeResultSet(rs);
closeStatement(sta);
closeConnection(conn);
}
}
3. Call the stored procedure:
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import oracle.jdbc.driver.OracleTypes;
/**
* The test calls the stored procedure
*
*/
public class StoredTest {
public static void main(String[] args) {
insert_call();
//select_call();
}
/**
* Execute stored procedure Insert data
*/
public static void insert_call() {
Connection conn = DBUtil.getConnection();
PreparedStatement pst = null;
CallableStatement proc = null; // Create the object that executes the stored procedure
try {
proc = conn.prepareCall("{ call insert_procedure(?,?) }");
proc.setString(1, "1"); // Set up the first 1 Input parameters
proc.setString(2, "hello call"); // Set up the first 1 Input parameters
proc.execute();// perform
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
// Shut down IO flow
proc.close();
DBUtil.closeAll(null, pst, conn);
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* Execute stored procedure Query data
*/
public static void select_call() {
Connection conn = DBUtil.getConnection();
CallableStatement stmt;
try {
stmt = conn.prepareCall("{ call select_procedure(?, ?) }"); // Multi-line syntax cannot be implemented with this calling method
stmt.setString(1, "1");
stmt.registerOutParameter(2, OracleTypes.CURSOR);
stmt.execute();
ResultSet rs = (ResultSet) stmt.getObject(2);
while (rs.next()) {
System.out.println(rs.getString("name"));
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.closeConnection(conn);
}
}
}
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