JDBC执行存储过程的四种情况

转载自:http://sishuok.com/forum/blogPost/list/488.html

 

本文主要是总结 如何实现 JDBC调用Oracle的存储过程，从以下情况分别介绍：

• [1]、只有输入IN参数，没有输出OUT参数
• [2]、既有输入IN参数，也有输出OUT参数，输出是简单值（非列表）
• [3]、既有输入IN参数，也有输出OUT参数，输出是列表
• [4]、输入输出参数是同一个（IN OUT）

【准备工作】

  创建一个测试表TMP_MICHAEL ，并插入数据，SQL如下：

create table TMP_MICHAEL
(
  USER_ID    VARCHAR2(20),
  USER_NAME  VARCHAR2(10),
  SALARY     NUMBER(8,2),
  OTHER_INFO VARCHAR2(100)
)

insert into TMP_MICHAEL (USER_ID, USER_NAME, SALARY, OTHER_INFO)
values ('michael', 'Michael', 5000, 'http://sjsky.iteye.com');
insert into TMP_MICHAEL (USER_ID, USER_NAME, SALARY, OTHER_INFO)
values ('zhangsan', '张三', 10000, null);
insert into TMP_MICHAEL (USER_ID, USER_NAME, SALARY, OTHER_INFO)
values ('aoi_sola', '苍井空', 99999.99, 'twitter account');
insert into TMP_MICHAEL (USER_ID, USER_NAME, SALARY, OTHER_INFO)
values ('李四', '李四', 2500, null);

  Oracle jdbc 常量：

private final static String DB_DRIVER = "oracle.jdbc.driver.OracleDriver";
private final static String DB_CONNECTION = "jdbc:oracle:thin:@127.0.0.1:1521:Ora11g";
private final static String DB_NAME = "mytest";
private final static String DB_PWd = "111111";

 [一]、只有输入IN参数，没有输出OUT参数

 

 

存储过程 TEST_MICHAEL_NOOUT 的相关SQL：

CREATE OR REPLACE PROCEDURE TEST_MICHAEL_NOOUT(P_USERID    IN VARCHAR2,
                                               P_USERNAME  IN VARCHAR2,
                                               P_SALARY    IN NUMBER,
                                               P_OTHERINFO IN VARCHAR2) IS
BEGIN

  INSERT INTO TMP_MICHAEL
    (USER_ID, USER_NAME, SALARY, OTHER_INFO)
  VALUES
    (P_USERID, P_USERNAME, P_SALARY, P_OTHERINFO);

END TEST_MICHAEL_NOOUT;

调用代码如下：

/**
    * 测试调用存储过程：无返回值
    * @blog http://sjsky.iteye.com
    * @author Michael
    * @throws Exception
    */
   public static void testProcNoOut() throws Exception {
       System.out.println("-------  start 测试调用存储过程：无返回值");
       Connection conn = null;
       CallableStatement callStmt = null;
       try {
           Class.forName(DB_DRIVER);
           conn = DriverManager.getConnection(DB_CONNECTION, DB_NAME, DB_PWd);
           // 存储过程 TEST_MICHAEL_NOOUT 其实是向数据库插入一条数据
           callStmt = conn.prepareCall("{call TEST_MICHAEL_NOOUT(?,?,?,?)}");

           // 参数index从1开始，依次 1,2,3...
           callStmt.setString(1, "jdbc");
           callStmt.setString(2, "JDBC");
           callStmt.setDouble(3, 8000.00);
           callStmt.setString(4, "http://sjsky.iteye.com");
           callStmt.execute();
           System.out.println("-------  Test End.");
       } catch (Exception e) {
           e.printStackTrace(System.out);
       } finally {
           if (null != callStmt) {
               callStmt.close();
           }
           if (null != conn) {
               conn.close();
           }
       }
   }

 

 

 

[二]、既有输入IN参数，也有输出OUT参数，输出是简单值（非列表）

 

存储过程 TEST_MICHAEL 的SQL如下：

CREATE OR REPLACE PROCEDURE TEST_MICHAEL(P_USERID IN VARCHAR2,
                                         P_SALARY IN NUMBER,
                                         P_COUNT  OUT NUMBER) IS
  V_SALARY NUMBER := P_SALARY;
BEGIN
  IF V_SALARY IS NULL THEN
    V_SALARY := 0;
  END IF;
  IF P_USERID IS NULL THEN
    SELECT COUNT(*)
      INTO P_COUNT
      FROM TMP_MICHAEL T
     WHERE T.SALARY >= V_SALARY;
  ELSE
    SELECT COUNT(*)
      INTO P_COUNT
      FROM TMP_MICHAEL T
     WHERE T.SALARY >= V_SALARY
       AND T.USER_ID LIKE '%' || P_USERID || '%';
  END IF;
  DBMS_OUTPUT.PUT_LINE('v_count=:' || P_COUNT);
END TEST_MICHAEL;

  调用程序如下：

/**
    * 测试调用存储过程：返回值是简单值非列表
    * @blog http://sjsky.iteye.com
    * @author Michael
    * @throws Exception
    */
   public static void testProcOutSimple() throws Exception {
       System.out.println("-------  start 测试调用存储过程：返回值是简单值非列表");
       Connection conn = null;
       CallableStatement stmt = null;
       try {
           Class.forName(DB_DRIVER);
           conn = DriverManager.getConnection(DB_CONNECTION, DB_NAME, DB_PWd);

           stmt = conn.prepareCall("{call TEST_MICHAEL(?,?,?)}");

           stmt.setString(1, "");
           stmt.setDouble(2, 3000);

           // out 注册的index 和取值时要对应
           stmt.registerOutParameter(3, Types.INTEGER);
           stmt.execute();

           // getXxx(index)中的index 需要和上面registerOutParameter的index对应
           int i = stmt.getInt(3);
           System.out.println("符号条件的查询结果 count := " + i);
           System.out.println("-------  Test End.");
       } catch (Exception e) {
           e.printStackTrace(System.out);
       } finally {
           if (null != stmt) {
               stmt.close();
           }
           if (null != conn) {
               conn.close();
           }
       }
   }

   测试程序就是查询薪水3000以上人员的数量 ，运行结果如下：

------- start 测试调用存储过程：返回值是简单值非列表
符号条件的查询结果 count := 4
------- Test End.

 

[三]、既有输入IN参数，也有输出OUT参数，输出是列表

  首先需要创建PACKAGE TEST_PKG_CURSOR 的SQL如下：

CREATE OR REPLACE PACKAGE TEST_PKG_CURSOR IS

  -- Author  : MICHAEL  http://sjsky.iteye.com
  TYPE TEST_CURSOR IS REF CURSOR;

END TEST_PKG_CURSOR;

再创建存储过程 TEST_P_OUTRS 的SQL如下：

CREATE OR REPLACE PROCEDURE TEST_P_OUTRS(P_SALARY IN NUMBER,
                                         P_OUTRS  OUT TEST_PKG_CURSOR.TEST_CURSOR) IS
  V_SALARY NUMBER := P_SALARY;
BEGIN
  IF P_SALARY IS NULL THEN
    V_SALARY := 0;
  END IF;
  OPEN P_OUTRS FOR
    SELECT * FROM TMP_MICHAEL T WHERE T.SALARY > V_SALARY;
END TEST_P_OUTRS;

 调用存储过程的代码如下：

/**
    * 测试调用存储过程：有返回值且返回值为列表的
    * @blog http://sjsky.iteye.com
    * @author Michael
    * @throws Exception
    */
   public static void testProcOutRs() throws Exception {
       System.out.println("-------  start 测试调用存储过程：有返回值且返回值为列表的");
       Connection conn = null;
       CallableStatement stmt = null;
       ResultSet rs = null;
       try {
           Class.forName(DB_DRIVER);
           conn = DriverManager.getConnection(DB_CONNECTION, DB_NAME, DB_PWd);

           stmt = conn.prepareCall("{call TEST_P_OUTRS(?,?)}");

           stmt.setDouble(1, 3000);
           stmt.registerOutParameter(2, OracleTypes.CURSOR);
           stmt.execute();

           // getXxx(index)中的index 需要和上面registerOutParameter的index对应
           rs = (ResultSet) stmt.getObject(2);
           // 获取列名及类型
           int colunmCount = rs.getMetaData().getColumnCount();
           String[] colNameArr = new String[colunmCount];
           String[] colTypeArr = new String[colunmCount];
           for (int i = 0; i < colunmCount; i++) {
               colNameArr[i] = rs.getMetaData().getColumnName(i + 1);
               colTypeArr[i] = rs.getMetaData().getColumnTypeName(i + 1);
               System.out.print(colNameArr[i] + "(" + colTypeArr[i] + ")"
                       + " | ");
           }
           System.out.println();
           while (rs.next()) {
               StringBuffer sb = new StringBuffer();
               for (int i = 0; i < colunmCount; i++) {
                   sb.append(rs.getString(i + 1) + " | ");
               }
               System.out.println(sb);
           }
           System.out.println("------- Test Proc Out is ResultSet end. ");

       } catch (Exception e) {
           e.printStackTrace(System.out);
       } finally {
           if (null != rs) {
               rs.close();
           }
           if (null != stmt) {
               stmt.close();
           }
           if (null != conn) {
               conn.close();
           }
       }
   }

 运行结果如下:

------- start 测试调用存储过程：有返回值且返回值为列表的
USER_ID(VARCHAR2) | USER_NAME(VARCHAR2) | SALARY(NUMBER) | OTHER_INFO(VARCHAR2) | 
michael | Michael | 5000 | null | 
zhangsan | 张三 | 10000 | null | 
aoi_sola | 苍井空 | 99999.99 | null | 
jdbc | JDBC | 8000 | http://sjsky.iteye.com | 
------- Test Proc Out is ResultSet end.

 

[四]、输入输出参数是同一个（IN OUT）

 

创建存储过程TEST_P_INOUT 的SQL如下：

CREATE OR REPLACE PROCEDURE TEST_P_INOUT(P_USERID IN VARCHAR2,
                                         P_NUM    IN OUT NUMBER) IS
  V_COUNT  NUMBER;
  V_SALARY NUMBER := P_NUM;
BEGIN
  IF V_SALARY IS NULL THEN
    V_SALARY := 0;
  END IF;

  SELECT COUNT(*)
    INTO V_COUNT
    FROM TMP_MICHAEL
   WHERE USER_ID LIKE '%' || P_USERID || '%'
     AND SALARY >= V_SALARY;
  P_NUM := V_COUNT;
END TEST_P_INOUT;

 调用存储过程的代码：

/**
     * 测试调用存储过程： INOUT同一个参数：
     * @blog http://sjsky.iteye.com
     * @author Michael
     * @throws Exception
     */
    public static void testProcInOut() throws Exception {
        System.out.println("-------  start 测试调用存储过程：INOUT同一个参数");
        Connection conn = null;
        CallableStatement stmt = null;
        try {
            Class.forName(DB_DRIVER);
            conn = DriverManager.getConnection(DB_CONNECTION, DB_NAME, DB_PWd);

            stmt = conn.prepareCall("{call TEST_P_INOUT(?,?)}");

            stmt.setString(1, "michael");
            stmt.setDouble(2, 3000);

            // 注意此次注册out 的index 和上面的in 参数index 相同
            stmt.registerOutParameter(2, Types.INTEGER);
            stmt.execute();

            // getXxx(index)中的index 需要和上面registerOutParameter的index对应
            int count = stmt.getInt(2);
            System.out.println("符号条件的查询结果 count := " + count);
            System.out.println("-------  Test End.");
        } catch (Exception e) {
            e.printStackTrace(System.out);
        } finally {
            if (null != stmt) {
                stmt.close();
            }
            if (null != conn) {
                conn.close();
            }
        }
    }

 运行结果如下：

------- start 测试调用存储过程：INOUT同一个参数
符号条件的查询结果 count := 1
------- Test End.