首先dao类名字是WebContentDao，以下为配置的oracle序列
<bean id="increWC" class="org.springframework.jdbc.support.incrementer.OracleSequenceMaxValueIncrementer"> <property name="incrementerName" value="s_webcontent"/> <!-- ①指定序列名 --> <property name="dataSource" ref="dataSource"/> <!-- ②设置数据源 --> </bean>以下为WebContentDao类的代码
@Autowired @Qualifier("jdbcTemplate") private JdbcTemplate jdbcTemplate; final Logger logger = LoggerFactory.getLogger(JdbcWebContentDao.class); @Autowired @Qualifier("increWC") private DataFieldMaxValueIncrementer increWC; @SuppressWarnings("unchecked") public int save(final WebContent wc){ final StringReader sr = new StringReader(wc.getContent()); final int length = wc.getContent().getBytes().length; jdbcTemplate.execute( "insert into webcontent(id,content,title) values (?,?,?)", new AbstractLobCreatingPreparedStatementCallback(new DefaultLobHandler()) { @Override int id = increWC.nextIntValue(); wc.setId(id); //由于要返回id，使用参数实体来保存id prep.setInt(1, id); lobCreator.setClobAsCharacterStream(prep, 2, sr, length); prep.setString(3, wc.getTitle()); //lobCreator.setBlobAsBinaryStream(ps, 3, blobIs, (int)blobIn.length()); } }); sr.close(); return wc.getId(); }由于Connection的ThreadLocal实现，两个属性JdbcTemplate和DataFieldMaxValueIncrementer都是取到同线程的Connection对象，所以不存在并发问题！
另外的一些做法
/** * 创建表 */ public void create(String tableName){ //tb_test1 jdbcTemplate.execute("create table "+tableName +" (id integer,user_name varchar2(40),password varchar2(40))"); } //jdbcTemplate.update适合于insert 、update和delete操作； /** * 第一个参数为执行sql * 第二个参数为参数数据 */ public void save3(User user) { Assert.isNull(user, "user is not null"); jdbcTemplate.update("insert into tb_test1(name,password) values(?,?)", new Object[]{user.getUsername(),user.getPassword()}); } /** * 第一个参数为执行sql * 第二个参数为参数数据 * 第三个参数为参数类型 */ @Override public void save(User user) { Assert.isNull(user, "user is not null"); jdbcTemplate.update( "insert into tb_test1(name,password) values(?,?)", new Object[]{user.getUsername(),user.getPassword()}, new int[]{java.sql.Types.VARCHAR,java.sql.Types.VARCHAR} ); } //避免sql注入 public void save2(final User user) { Assert.isNull(user, "user is not null"); jdbcTemplate.update("insert into tb_test1(name,password) values(?,?)", new PreparedStatementSetter(){ @Override public void setValues(PreparedStatement ps) throws SQLException { ps.setString(1, user.getUsername()); ps.setString(2, user.getPassword()); } }); } public void save4(User user) { Assert.isNull(user, "user is not null"); jdbcTemplate.update("insert into tb_test1(name,password) values(?,?)", new Object[]{user.getUsername(),user.getPassword()}); } //返回插入的主键 public List save5(final User user) { KeyHolder keyHolder = new GeneratedKeyHolder(); jdbcTemplate.update(new PreparedStatementCreator() { @Override public PreparedStatement createPreparedStatement(Connection connection) throws SQLException { PreparedStatement ps = connection.prepareStatement("insert into tb_test1(name,password) values(?,?)", new String[] {"id"}); ps.setString(1, user.getUsername()); ps.setString(2, user.getPassword()); return ps; } }, keyHolder); return keyHolder.getKeyList(); } @Override public void update(final User user) { jdbcTemplate.update( "update tb_test1 set name=？,password=？ where id = ?", new PreparedStatementSetter(){ @Override public void setValues(PreparedStatement ps) throws SQLException { ps.setString(1, user.getUsername()); ps.setString(2, user.getPassword()); ps.setInt(3, user.getId()); } } ); } @Override public void delete(User user) { Assert.isNull(user, "user is not null"); jdbcTemplate.update( "delete from tb_test1 where id = ?", new Object[]{user.getId()}, new int[]{java.sql.Types.INTEGER}); } @Deprecated //因为没有查询条件，所以用处不大 public int queryForInt1(){ return jdbcTemplate.queryForInt("select count(0) from tb_test1"); } public int queryForInt2(User user){ return jdbcTemplate.queryForInt("select count(0) from tb_test1 where username = ?" , new Object[]{user.getUsername()}); } //最全的参数3个 public int queryForInt3(User user){ return jdbcTemplate.queryForInt("select count(0) from tb_test1 where username = ?" , new Object[]{user.getUsername()}, new int[]{java.sql.Types.VARCHAR}); } //可以返回是一个基本类型的值 @Deprecated //因为没有查询条件，所以用处不大 public String queryForObject1(User user) { return (String) jdbcTemplate.queryForObject("select username from tb_test1 where id = 100", String.class); } //可以返回值是一个对象 @Deprecated //因为没有查询条件，所以用处不大 public User queryForObject2(User user) { return (User) jdbcTemplate.queryForObject("select * from tb_test1 where id = 100", User.class); //class是结果数据的java类型 } @Deprecated //因为没有查询条件，所以用处不大 public User queryForObject3(User user) { return (User) jdbcTemplate.queryForObject("select * from tb_test1 where id = 100", new RowMapper(){ @Override public Object mapRow(ResultSet rs, int rowNum)throws SQLException { User user = new User(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); return user; } } ); } public User queryForObject4(User user) { return (User) jdbcTemplate.queryForObject("select * from tb_test1 where id = ?", new Object[]{user.getId()}, User.class); //class是结果数据的java类型 实际上这里是做反射，将查询的结果和User进行对应复制 } public User queryForObject5(User user) { return (User) jdbcTemplate.queryForObject( "select * from tb_test1 where id = ?", new Object[]{user.getId()}, new RowMapper(){ @Override public Object mapRow(ResultSet rs,int rowNum)throws SQLException { User user = new User(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); return user; } }); //class是结果数据的java类型 } @Override public User queryForObject(User user) { //方法有返回值 return (User) jdbcTemplate.queryForObject("select * from tb_test1 where id = ?", new Object[]{user.getId()}, new int[]{java.sql.Types.INTEGER}, new RowMapper() { @Override public Object mapRow(ResultSet rs, int rowNum) throws SQLException { User user = new User(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); return user; } } ); } @SuppressWarnings("unchecked") public List<User> queryForList1(User user) { return (List<User>) jdbcTemplate.queryForList("select * from tb_test1 where username = ?", new Object[]{user.getUsername()}, User.class); } @SuppressWarnings("unchecked") public List<String> queryForList2(User user) { return (List<String>) jdbcTemplate.queryForList("select username from tb_test1 where sex = ?", new Object[]{user.getSex()}, String.class); } @SuppressWarnings("unchecked") //最全的参数查询 public List<User> queryForList3(User user) { return (List<User>) jdbcTemplate.queryForList("select * from tb_test1 where username = ?", new Object[]{user.getUsername()}, new int[]{java.sql.Types.VARCHAR}, User.class); } //通过RowCallbackHandler对Select语句得到的每行记录进行解析，并为其创建一个User数据对象。实现了手动的OR映射。 public User queryUserById4(String id){ final User user = new User(); //该方法返回值为void this.jdbcTemplate.query("select * from tb_test1 where id = ?", new Object[] { id }, new RowCallbackHandler() { @Override public void processRow(ResultSet rs) throws SQLException { User user = new User(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); } }); return user; } @SuppressWarnings("unchecked") @Override public List<User> list(User user) { return jdbcTemplate.query("select * from tb_test1 where username like '%?%'", new Object[]{user.getUsername()}, new int[]{java.sql.Types.VARCHAR}, new RowMapper(){ @Override public Object mapRow(ResultSet rs, int rowNum) throws SQLException { User user = new User(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); return user; } }); } //批量操作 适合于增、删、改操作 public int[] batchUpdate(final List users) { int[] updateCounts = jdbcTemplate.batchUpdate( "update tb_test1 set username = ?, password = ? where id = ?", new BatchPreparedStatementSetter() { @Override public void setValues(PreparedStatement ps, int i) throws SQLException { ps.setString(1, ((User)users.get(i)).getUsername()); ps.setString(2, ((User)users.get(i)).getPassword()); ps.setLong(3, ((User)users.get(i)).getId()); } @Override public int getBatchSize() { return users.size(); } } ); return updateCounts; } //调用存储过程 public void callProcedure(int id){ this.jdbcTemplate.update("call SUPPORT.REFRESH_USERS_SUMMARY(?)", new Object[]{Long.valueOf(id)}); }