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);  }}