1、使用JdbcTemplate的execute()方法執(zhí)行SQL語(yǔ)句

jdbcTemplate.execute("CREATE TABLE USER (user_id integer, name varchar(100))");

2、如果是UPDATE或INSERT,可以用update()方法。

jdbcTemplate.update("INSERT INTO USER VALUES('"
           + user.getId() + "', '"
           + user.getName() + "', '"
           + user.getSex() + "', '"
           + user.getAge() + "')");

3、帶參數(shù)的更新

jdbcTemplate.update("UPDATE USER SET name = ? WHERE user_id = ?", new Object[] {name, id});

jdbcTemplate.update("INSERT INTO USER VALUES(?, ?, ?, ?)", new Object[] {user.getId(), user.getName(), user.getSex(), user.getAge()});

4、使用JdbcTemplate進(jìn)行查詢時(shí)，使用queryForXXX()等方法

int count = jdbcTemplate.queryForInt("SELECT COUNT(*) FROM USER");

String name = (String) jdbcTemplate.queryForObject("SELECT name FROM USER WHERE user_id = ?", new Object[] {id}, java.lang.String.class);

List rows = jdbcTemplate.queryForList("SELECT * FROM USER");

List rows = jdbcTemplate.queryForList("SELECT * FROM USER");
Iterator it = rows.iterator();
while(it.hasNext()) {
    Map userMap = (Map) it.next();
    System.out.print(userMap.get("user_id") + "\t");
    System.out.print(userMap.get("name") + "\t");
    System.out.print(userMap.get("sex") + "\t");
    System.out.println(userMap.get("age") + "\t");
}

JdbcTemplate將我們使用的JDBC的流程封裝起來(lái)，包括了異常的捕捉、SQL的執(zhí)行、查詢結(jié)果的轉(zhuǎn)換等等。spring大量使用Template Method模式來(lái)封裝固定流程的動(dòng)作，XXXTemplate等類(lèi)別都是基于這種方式的實(shí)現(xiàn)。
除了大量使用Template Method來(lái)封裝一些底層的操作細(xì)節(jié)，spring也大量使用callback方式類(lèi)回調(diào)相關(guān)類(lèi)別的方法以提供JDBC相關(guān)類(lèi)別的功能，使傳統(tǒng)的JDBC的使用者也能清楚了解spring所提供的相關(guān)封裝類(lèi)別方法的使用。

JDBC的PreparedStatement

final String id = user.getId();
final String name = user.getName();
final String sex = user.getSex() + "";
final int age = user.getAge();

jdbcTemplate.update("INSERT INTO USER VALUES(?, ?, ?, ?)",
                     new PreparedStatementSetter() {
                         public void setValues(PreparedStatement ps) throws SQLException {
                             ps.setString(1, id);
                             ps.setString(2, name);          
                             ps.setString(3, sex);
                             ps.setInt(4, age);
                         }
                     });

final User user = new User();
jdbcTemplate.query("SELECT * FROM USER WHERE user_id = ?",
                    new Object[] {id},
                    new RowCallbackHandler() {
                        public void processRow(ResultSet rs) throws SQLException {
                            user.setId(rs.getString("user_id"));
                            user.setName(rs.getString("name"));
                            user.setSex(rs.getString("sex").charAt(0));
                            user.setAge(rs.getInt("age"));
                        }
                    });

class UserRowMapper implements RowMapper {
    public Object mapRow(ResultSet rs, int index) throws SQLException {
        User user = new User();

        user.setId(rs.getString("user_id"));
        user.setName(rs.getString("name"));
        user.setSex(rs.getString("sex").charAt(0));
        user.setAge(rs.getInt("age"));

        return user;
    }
}

public List findAllByRowMapperResultReader() {
    String sql = "SELECT * FROM USER";
    return jdbcTemplate.query(sql, new RowMapperResultReader(new UserRowMapper()));
}

在getUser(id)里面使用UserRowMapper

public User getUser(final String id) throws DataAccessException {
    String sql = "SELECT * FROM USER WHERE user_id=?";
    final Object[] params = new Object[] { id };
    List list = jdbcTemplate.query(sql, params, new RowMapperResultReader(new UserRowMapper()));

    return (User) list.get(0);
}

網(wǎng)上收集
org.springframework.jdbc.core.PreparedStatementCreator 返回預(yù)編譯SQL 不能于Object[]一起用

public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
  return con.prepareStatement(sql);
 }

1.增刪改
org.springframework.jdbc.core.JdbcTemplate 類(lèi)(必須指定數(shù)據(jù)源dataSource)

 template.update("insert into web_person values(?,?,?)",Object[]);
 template.update("insert into web_person values(?,?,?)",new PreparedStatementSetter(){ 匿名內(nèi)部類(lèi) 只能訪問(wèn)外部最終局部變量

  public void setValues(PreparedStatement ps) throws SQLException {
   ps.setInt(index++,3);
 });



org.springframework.jdbc.core.PreparedStatementSetter 接口 處理預(yù)編譯SQL

 public void setValues(PreparedStatement ps) throws SQLException {
  ps.setInt(index++,3);
 }

2.查詢JdbcTemplate.query(String,[Object[]/PreparedStatementSetter],RowMapper/RowCallbackHandler)
org.springframework.jdbc.core.RowMapper 記錄映射接口 處理結(jié)果集

 public Object mapRow(ResultSet rs, int arg1) throws SQLException {   int表當(dāng)前行數(shù)
   person.setId(rs.getInt("id"));
 }
 List template.query("select * from web_person where id=?",Object[],RowMapper);


org.springframework.jdbc.core.RowCallbackHandler 記錄回調(diào)管理器接口 處理結(jié)果集

 template.query("select * from web_person where id=?",Object[],new RowCallbackHandler(){
  public void processRow(ResultSet rs) throws SQLException {
   person.setId(rs.getInt("id"));
 });