spring中jdbcTemplate的应用 二

Spring中jdbcTemplate常用方法使用

【注意：】jdbcTemplate 中的sql均是用“?”做占位符的

domain User：

java代码

    public class User {          private int id;          private String username;          private String password;          private String sex;          //setter和getter方法省略……      }  

UserServiceImpl ：

如果采用第三种方式，则下面的用法中将方法中的 jdbcTemplate 换成 this.getJdbcTemplate()即可。其中

batchUpdate适合于批量增、删、改操作；

update(…)：使用于增、删、改操作；

execute（）：执行一个独立的sql语句，包括ddl语句；

queryForInt ：查询出一个整数值

java代码

创建表  public void create(String tableName){     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；     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()});  }      public void save(User user) {            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) {                   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) {               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() {                        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();      }     public void update(final User user) {          jdbcTemplate.update("update tb_test1 set name=？,password=？ where id = ?",                   new PreparedStatementSetter(){                                         public void setValues(PreparedStatement ps) throws SQLException {                          ps.setString(1, user.getUsername());                          ps.setString(2, user.getPassword());                          ps.setInt(3, user.getId());                      }                  }          );      }    public void delete(User user) {          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)});  }