做一点，记一点 ~ Java调用Oracle存储过程

一、需求

        传入一个参数，返回一条或多条记录（列表）。

二、实现步骤

　　1. 编写Oracle存储过程。

-- 声明包和包体的语句应该分两次执行，即使声明在前定义在后，如果一起执行依然会编译出错
-- 调用能够返回多条记录的存储过程需要定义在包内



--声明包及包内的游标、存储过程
CREATE OR REPLACE PACKAGE pack_myPackage IS
    TYPE myCursor IS REF CURSOR;
    PROCEDURE proc_querySomeInfo(pNo IN VARCHAR2, myCursor OUT myCursor);
END pack_myPackage;


--定义包体
CREATE OR REPLACE PACKAGE BODY pack_myPackage IS
PROCEDURE proc_querySomeInfo(pNo IN VARCHAR2, outcursor OUT myCursor) IS
BEGIN
　　OPEN outcursor FOR
　　　　SELECT * FROM tableA WHERE P_NO = pNo;
END proc_querySomeInfo;
END pack_myPackage;

　　2. 编写Java代码

package vip.yaocn.test;

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

/**
 * 存储过程测试
 *
 * @author yacon
 */
public class ProcedureTest {
    public static void main(String[] args) throws Exception {
        String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
        String driverName = "oracle.jdbc.driver.OracleDriver";
        String username = "scott";
        String password = "tiger";
        Connection conn = null;
        CallableStatement cstmt = null;
        ResultSet rs = null;
        try {
            Class.forName(driverName);
            conn = DriverManager.getConnection(url, username, password);
            String callSql = "{call pack_myPackage.proc_getSomeInfo(?, ?) }";
            cstmt = conn.prepareCall(callSql);
            cstmt.setString(1, "1001");
            cstmt.registerOutParameter(2, oracle.jdbc.OracleTypes.CURSOR);
            cstmt.execute();
            rs = (ResultSet) cstmt.getObject(2);
            if (rs != null) {
                while (rs.next()) {
                    System.out.println(rs.getString(1));
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (cstmt != null) {
                    cstmt.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

三、 其他需求

　　1. Java调用有返回值的Oracle存储过程（返回一个简单类型的值）

　　（1）定义存储过程：

CREATE OR REPLACE PROCEDURE proc_A(param1 IN VARCHAR2, param2 OUT VARCHAR2) 
AS
BEGIN
    SELECT name INTO param2 FROM T_A WHERE id = param1; 
END; 

　　（2）编写Java代码：

package vip.yaocn.test;

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

/**
 * 存储过程测试
 *
 * @author yacon
 */
public class ProcedureTest {
    public static void main(String[] args) throws Exception {
        String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
        String driverName = "oracle.jdbc.driver.OracleDriver";
        String username = "scott";
        String password = "tiger";
        Connection conn = null;
        CallableStatement cstmt = null;
        ResultSet rs = null;
        try {
            Class.forName(driverName);
            conn = DriverManager.getConnection(url, username, password);
            String callSql = "{call proc_A(?, ?) }";
            cstmt = conn.prepareCall(callSql);
            cstmt.setString(1, "1001");
            cstmt.registerOutParameter(2, oracle.jdbc.OracleTypes.VARCHAR);
            cstmt.execute();
            System.out.println("Output is:" + cstmt.getString(2)); 
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (cstmt != null) {
                    cstmt.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

　　2. Java调用无返回值的Oracle存储过程（无返回值）

　　（1）定义存储过程：

CREATE OR REPLACE PROCEDURE proc_B(param1 IN VARCHAR2, param2 IN VARCHAR2) 
AS
BEGIN
    INSERT INTO T_B VALUES(param1, param2);
END; 

　　（2）编写Java代码：

package vip.yaocn.test;

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

/**
 * 存储过程测试
 *
 * @author yacon
 */
public class ProcedureTest {
    public static void main(String[] args) throws Exception {
        String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
        String driverName = "oracle.jdbc.driver.OracleDriver";
        String username = "scott";
        String password = "tiger";
        Connection conn = null;
        CallableStatement cstmt = null;
        ResultSet rs = null;
        try {
            Class.forName(driverName);
            conn = DriverManager.getConnection(url, username, password);
            String callSql = "{call proc_B(?, ?) }";
            cstmt = conn.prepareCall(callSql);
            cstmt.setString(1, "1001");
            cstmt.setString(2, "TEST");
            cstmt.execute();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (cstmt != null) {
                    cstmt.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

四、相关知识

　　 1. 在plsql developer中测试存储过程时可以在存储过程名上右击选择 “测试” ，如果需要提供参数可以在下方填入参数，如果没有参数则点击执行按钮即可。