浅析Spring的JdbcTemplate方法

DriverManagerDataSource dataSource=new DriverManagerDataSource();
    dataSource.setDriverClassName("com.mysql.jdbc.Driver");
    dataSource.setUrl("jdbc:mysql:///springjdbc");
    dataSource.setUsername("root");
    dataSource.setPassword("1997WFY.....");

    JdbcTemplate template=new JdbcTemplate();
    template.setDataSource(dataSource);
    template.execute("create table book(id int primary key auto_increment,name varchar(20) not null,author varchar(25))");

  <!-- XML配置Spring默认的连接池 -->
  <bean id="driverManagerDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql:///springjdbc"/> 
    <property name="username" value="root"/>
    <property name="password" value="1997WFY....."/>
  </bean>
  <bean class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="driverManagerDataSource"/>
  </bean>

/**
 * @author BeautifulSoup
 * 首先使用Spring内置的连接池
 */
@ContextConfiguration("classpath:applicationContext.xml")
@RunWith(SpringJUnit4ClassRunner.class)
public class SpringJdbcTest {

  @Autowired
  private JdbcTemplate template;

  @Test
  public void testDriverManagerDataSource() {
    template.execute("create table book(id int primary key auto_increment,name varchar(20) not null,author varchar(25))");
  }

}

  <!-- 配置Druid的连接池 -->
  <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql:///springjdbc" />
    <property name="username" value="root" />
    <property name="password" value="1997WFY....." />
    <!-- 设置初始的连接数目,最小的连接数，最大的连接数 -->
    <property name="initialSize" value="1" />
    <property name="minIdle" value="1" />
    <property name="maxActive" value="8" />
    <!-- 配置获取连接等待超时的时间 -->
    <property name="maxWait" value="10000" />
    <!-- 配置间隔多久才进行一次检测需要关闭的空闲连接 -->
    <property name="timeBetweenEvictionRunsMillis" value="60000" />
    <!-- 配置一个连接在池中最小的生存时间 -->
    <property name="minEvictableIdleTimeMillis" value="300000" />
    <property name="testWhileIdle" value="true" />
    <!-- 这里建议配置为TRUE，防止取到的连接不可用 -->
    <property name="testOnBorrow" value="true" />
    <property name="testOnReturn" value="false" />
    <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
    <property name="poolPreparedStatements" value="true" />
    <property name="maxPoolPreparedStatementPerConnectionSize"
      value="20" />
    <!-- 这里配置提交方式，默认就是TRUE，可以不用配置 -->
    <property name="defaultAutoCommit" value="true" />
    <!-- 验证连接有效与否的SQL，不同的数据配置不同 -->
    <property name="validationQuery" value="select 1 " />
    <property name="filters" value="stat" />
  </bean>
  <bean class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="druidDataSource" />
  </bean>

/**
 * @author BeautifulSoup
 * 首先使用Spring内置的连接池
 */
@ContextConfiguration("classpath:applicationContext.xml")
@RunWith(SpringJUnit4ClassRunner.class)
public class SpringJdbcTest {
  @Autowired
  private JdbcTemplate template;
  @Test
  public void testSpringJdbc() {
    template.execute("create table book(id int primary key auto_increment,name varchar(20) not null,author varchar(25))");
  }
}

/**
 * @author BeautifulSoup
 * 创建实体类对象
 */
public class Book {
  private Integer id;
  private String name;
  private String author;
  public Integer getId() {
    return id;
  }
  public void setId(Integer id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getAuthor() {
    return author;
  }
  public void setAuthor(String author) {
    this.author = author;
  }
  @Override
  public String toString() {
    return "Book [id=" + id + ", name=" + name + ", author=" + author + "]";
  }
}

<bean class="com.fuyunwang.springjdbc.dao.BookDao">
    <property name="jdbcTemplate" ref="jdbcTemplate"/>
</bean>

/**
 * @author BeautifulSoup 完成基本的增删改查
 */
public class BookDao extends JdbcDaoSupport {

  public void add(Book book) {
    String sql = "insert into book values(?,?,?)";
    getJdbcTemplate().update(sql, book.getId(), book.getName(),
        book.getAuthor());
  }

  public void update(Book book) {
    String sql = "update book set name = ? , author = ? where id =?";
    getJdbcTemplate().update(sql, book.getName(), book.getAuthor(),
        book.getId());
  }

  public void delete(Book book) {
    String sql = "delete from book where id =?";
    getJdbcTemplate().update(sql, book.getId());
  }

  public int findCount() {
    String sql = "select count(*) from book";
    return getJdbcTemplate().queryForInt(sql);
  }

  public String findNameById(int id) {
    String sql = "select name from book where id = ?";
    return getJdbcTemplate().queryForObject(sql, String.class, id);
  }

  public Book findById(int id) {
    String sql = "select * from book where id = ?";
    return getJdbcTemplate().queryForObject(sql, new BookMapper(), id);
  }

  public List<Book> findAll(){
    String sql="select * from book";
    return getJdbcTemplate().query(sql, new BookMapper());
  }
  class BookMapper implements RowMapper<Book> {
    public Book mapRow(ResultSet rs, int rowNum) throws SQLException {
      Book book = new Book();
      book.setId(rs.getInt("id"));
      book.setName(rs.getString("name"));
      book.setAuthor(rs.getString("author"));
      return book;
    }

  }
}

/**
 * @author BeautifulSoup
 * 首先使用Spring内置的连接池
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringJdbcTest {

  @Autowired
  private BookDao bookDao;

  @Test
  public void jdbcTemplateAdd(){
    Book book=new Book();
    book.setId(1);
    book.setName("SpringBoot实战");
    book.setAuthor("Craig Walls");
    bookDao.add(book);
  }


}