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spring-framework-1.2.6-chapter11

morcble的blog — Fri, 30 Dec 2005 11:52:00 GMT

11.2. Using the JDBC Core classes to control basic JDBC
processing and error handling

11.2.1.
创徏数据源（数据源里隐藏了数据连接池�Q?BR>DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName( "org.hsqldb.jdbcDriver");
dataSource.setUrl( "jdbc:hsqldb:hsql://localhost:");
dataSource.setUsername( "sa");
dataSource.setPassword( "");

11.2.3. SQLExceptionTranslator
配置JdbcTemplate及异常处�?BR> // create a JdbcTemplate and set data source
JdbcTemplate jt = new JdbcTemplate();
jt.setDataSource(dataSource);
// create a custom translator and set the datasource for the default translation lookup
MySQLErrorCodesTransalator tr = new MySQLErrorCodesTransalator();
tr.setDataSource(dataSource);
jt.setExceptionTranslator(tr);
// use the JdbcTemplate for this SqlUpdate
SqlUpdate su = new SqlUpdate();
su.setJdbcTemplate(jt);
su.setSql("update orders set shipping_charge = shipping_charge * 1.05");
su.compile();
su.update();

11.2.4 ��单的调用配置好了的JdbcTemplate��可以执行SQL语句如下

import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
public class ExecuteAStatement {
  private JdbcTemplate jt;
  private DataSource dataSource;
  public void doExecute() {
   jt = new JdbcTemplate(dataSource);
   jt.execute("create table mytable (id integer, name varchar(100))");
  }
  public void setDataSource(DataSource dataSource) {
   this.dataSource = dataSource;
  }
}

11.2.5. 执行查询语句
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
public class RunAQuery {
   private JdbcTemplate jt;
   private DataSource dataSource;
   public int getCount() {
  jt = new JdbcTemplate(dataSource);
  int count = jt.queryForInt("select count(*) from mytable");
  return count;
}

public String getName() {
   jt = new JdbcTemplate(dataSource);
   String name = (String) jt.queryForObject("select name from mytable", String.class);
   �Q�注�Q�如果更新语句就书写jt.update("update mytable set name = ? where id = ?", new Object[] {name, new Integer(id)});�Q?BR>   return name;
}�?/FONT>

        public List getList() {
   jt = new JdbcTemplate(dataSource);
   List rows = jt.queryForList("select * from mytable");
   return rows;
}�?nbsp; �Q�①②取其一�Q?BR>
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
}

morcble的blog 2005-12-30 19:52 发表评论

spring-framework-1.2.6-chapter8

morcble的blog — Fri, 30 Dec 2005 11:49:00 GMT

8.2. Transaction strategies
1。��用SPRING�q�_��事务��理�?/FONT>

The PlatformTransactionManager definition will look like this:

使用JTA事务��理�?BR>If we use JTA, as in the dataAccessContext-jta.xml file from the same sample application, we need to use a
container DataSource, obtained via JNDI, and a JtaTransactionManager implementation. The
JtaTransactionManager doesn't need to know about the DataSource, or any other specific resources, as it will
use the container's global transaction management.

以上两种�Ҏ��实现的功能是�{�效的�?/FONT>

2。把hibernate和spring�l�合��h��




           org/springframework/samples/petclinic/hibernate/petclinic.hbm.xml




           ${hibernate.dialect}



①（局部事务）

①处With Hibernate and JTA transactions we could simply use the JtaTransactionManager as with JDBC or any
other resource strategy.
�Q�JTA为全局事务�Q?/FONT>

声明式事务管�?BR>

...


      PROPAGATION_REQUIRED,-MyCheckedException
      PROPAGATION_REQUIRED
      PROPAGATION_REQUIRED,readOnly

morcble的blog 2005-12-30 19:49 发表评论

spring-framework-1.2.6-chapter3

morcble的blog — Wed, 28 Dec 2005 11:38:00 GMT

最基础的包中有两个是org.springframework.beans 和org.springframework.context .�q�两个包提供了spring依赖注射功能的基��?BR>BeanFactory提供了高�U�的配置机制用于��理beans�?BR>ApplicationContext接口建立在BeanFactory接口之上�Q�BeanFactory的子�c�）�Q�又��d��了其它的功能�Q�比如：更容易与Spring AOP功能�l�合�Q�信息资源处理，事�g传播�Q�徏立ApplicationContext和父Contexts的机�Ӟ��应用层特�D�的context�Q�如WebApplicationContext�Q��?BR>ApplicationContext是BeanFactory的扩展，所有BeanFactory的功能都能在ApplicationContext中实现。在建立的项目处于j2ee环境的时候最好选择ApplicationContext�Q�当你对内存的占有很兛_��的时候（如一个applet会关心每KB大小�Q�可以选择BeanFactory�Q�占内存��）�?BR>BeanFactory 是�ؓ了访问Spring bean container�Q�可以把它看成事实上的container.一般简单的BeanFactory的实现是org.springframework.beans.factory.xml.XmlBeanFactory�?BR>创徏 BeanFatory�?个办法如�?nbsp;
1。Resource res = new FileSystemResource("beans.xml");
   XmlBeanFactory factory = new XmlBeanFactory(res);
2。ClassPathResource res = new ClassPathResource("beans.xml");
   XmlBeanFactory factory = new XmlBeanFactory(res);
3。ClassPathXmlApplicationContext appContext = new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml", "applicationContext-part2.xml"});
      // of course, an ApplicationContext is just a BeanFactory
   BeanFactory factory = (BeanFactory) appContext;
   �Q�注�Q�public interface Resourceextends InputStreamSource�Q?BR>        public interface InputStreamSource�Q?BR>多数用法中，用户不需要编写代码初始化BeanFactory �?ApplicationContext�Q�因为Spring框架会自动完成。例如：在web层提供了代码自动装蝲
ApplicationContext�Q�作为正常的j2eeWEB应用�E�序开始的一部分�?BR>

配置bean的XML几种格式如下�Q?BR> (1)。通过构造函数创建bean�Q�bean可以是javabean 也可以不是，也不用实现别的接口�?BR>

    如果你需要实现IOC机制�Q�你的bean需要一个默认的�I�参数构造函数�?BR> (2)。通过静态工厂函数创建bean.
        factory-method="createInstance"/>
      createInstance是examples.ExampleBean2的静态工厂方法，用于生成exampleBean�?BR> (3).通过实例工厂�Ҏ��创徏bean.

...

To singleton or not to singleton
class="examples.ExampleBean" singleton="false"/>
class="examples.ExampleBeanTwo" singleton="true"/>

几种依赖注射格式
(1)setter注射

1

public class ExampleBean {
private AnotherBean beanOne;
private YetAnotherBean beanTwo;
private int i;

public void setBeanOne(AnotherBean beanOne) {
this.beanOne = beanOne;
}
public void setBeanTwo(YetAnotherBean beanTwo) {
this.beanTwo = beanTwo;
}
public void setIntegerProperty(int i) {
this.i = i;
}
}

(2)构造函数注��?BR>

1

public class ExampleBean {
private AnotherBean beanOne;
private YetAnotherBean beanTwo;
private int i;
public ExampleBean(AnotherBean anotherBean, YetAnotherBean yetAnotherBean, int i) {
this.beanOne = anotherBean;
this.beanTwo = yetAnotherBean;
this.i = i;
}
}

(3)静态工厂注��?BR>

1

public class ExampleBean {
...
// a private constructor
   private ExampleBean(...) {
   ...
   }
// a static factory method
// the arguments to this method can be considered the dependencies of the bean that
// is returned, regardless of how those arguments are actually used.
     public static ExampleBean createInstance(AnotherBean anotherBean, YetAnotherBean yetAnotherBean, int i) {
        ExampleBean eb = new ExampleBean(...);
       // some other operations
        ...
      return eb;
     }
}

构造函数配�|�的另一�U�格�?BR>
7500000
42

可以在配�|�文件中加入验证数据的类�?如下

7500000
42

一般属性配�|�格�?BR>

     com.mysql.jdbc.Driver

     jdbc:mysql://localhost:3306/mydb

     root

注意�Q?lt;value> 默认为空字符�Ԍ��

属性null的格式如�?BR>

属性collection的格式如�?BR>


     The magic property
     The funny property



     a list element followed by a reference





         yup an entry
         just some string


         yup a ref




     just some string

3.3.3.4. Inner bean definitions via nested bean elements


      //嵌套的bean不需要id
         Tony
         51

复合属性定�?BR>
属性fred下有属性bob,bob属性下有sammy 把sammy�|��ؓ123�?BR>

3.3.4. Method Injection�Q�方法注��）



   ...


我的理解�Q�myBean 中必��d��?protected [abstract] SingleShotHelper createSingleShotHelper();
singleShotHelper中必��d��?protected SingleShotHelper createSingleShotHelper();
�q�行�?nbsp; singleShotHelper的createSingleShotHelper会覆盖myBean的createSingleShotHelper�?/未验�?/FONT>

3.3.4.2. Arbitrary method replacement�Q��Q意的�Ҏ��替换�Q?BR>public class MyValueCalculator {
     public String computeValue(String input) {
     ... some real code
     }
     ... some other methods
}

�q�行替换的类必须实现接口org.springframework.beans.factory.support.MethodReplacer
public class ReplacementComputeValue implements MethodReplacer {
   public Object reimplement(Object o, Method m, Object[] args) throws Throwable {
// get the input value, work with it, and return a computed result
   String input = (String) args[0];
   ...
   return ...;
}
}

String �q�里表示�Ҏ��接受的参敎ͼ�有几个列几个�?BR> �q�样myValueCalculator中的computeValue�Ҏ��p��替换�?BR>

3.4.1生命周期

public class ExampleBean {
   public void init() {
    // do some initialization work
   }
}
Is exactly the same as:

public class AnotherExampleBean implements InitializingBean {
public void afterPropertiesSet() {
// do some initialization work
}
}

public class ExampleBean {
    public void cleanup() {
   // do some destruction work (like closing connection)
   }
}
Is exactly the same as:

    public class AnotherExampleBean implements DisposableBean {
    public void destroy() {
      // do some destruction work
    }
}

===============================================
3.7. 用BeanPostProcessors自定义beans
   ConfigurableBeanFactory bf = new .....; // create BeanFactory
    ... // now register some beans
   // now register any needed BeanPostProcessors
    MyBeanPostProcessor pp = new MyBeanPostProcessor();
   bf.addBeanPostProcessor(pp);
   // now start using the factory

3.8. 用BeanFactoryPostProcessors 自定义bean factories
   XmlBeanFactory factory = new XmlBeanFactory(new FileSystemResource("beans.xml"));
     // create placeholderconfigurer to bring in some property
     // values from a Properties file
   PropertyPlaceholderConfigurer cfg = new PropertyPlaceholderConfigurer();
   cfg.setLocation(new FileSystemResource("jdbc.properties"));
   // now actually do the replacement
   cfg.postProcessBeanFactory(factory);
�Q�也可以声明式定�?BR>



�Q?/FONT>

�׃��
以下�q�个处于beanfactory容器里的数据源就按jdbc.properties里的配置�?BR>

其中jdbc.properties如下
jdbc.driverClassName=org.hsqldb.jdbcDriver
jdbc.url=jdbc:hsqldb:hsql://production:9002
jdbc.username=sa
jdbc.password=root

3.8.2. The PropertyOverrideConfigurer

3.19. Creating an ApplicationContext from a web application

contextConfigLocation
/WEB-INF/daoContext.xml /WEB-INF/applicationContext.xml

org.springframework.web.context.ContextLoaderListener
�Q�the listener cannot be used in Servlet 2.2 compatible
containers 但是在Servlet2.4后都普遍采用它）

morcble的blog 2005-12-28 19:38 发表评论

spring-framework-1.2.6-chapter1

morcble的blog — Wed, 28 Dec 2005 04:14:00 GMT

spring �?个模块组成�?BR>1。Core package 是spring框架最基础的包。它提供了依赖注��机�Ӟ��让你能够通过调用函数��理bean容器。这里最基础的概忉|��BeanFactory�Q�public interface BeanFactory�Q�，它可以通过工厂模式创徏singletons�Q�不再需要你自己�~�程实现�Q��ƈ且可以解耦你的实际程序的业务逻辑�?BR>2。Context package 提供了框架式讉K��beans的方法，�c�M��JNDI-registry。它�l�承了Beans包的功能�Q��ƈ��d��了支持文本信息的发送的功能�Q�例如：资源捆绑�Q�事件传播，资源装蝲和透明的上下文创徏。具体应用实例如servlet容器�?BR>3。DAO package 提供了一个提取了jdbc的层�Q�让你不必编写乏味的jdbc代码�Q�不必考虑因不同数据库的代码差异而带来的错误。jdbc包（org.springframework.jdbc�Q�提供了一个声明式�Q�在xml配置文�g中说明）的事务管理，不仅针对实现特定接口的类有用�Q�而且�Ҏ��有的POJOs (plain old java objects)�?BR>4。ORM package 针对目前��行的对象关�p�L��APIS提供了多个综合的层，其中包括了JDO,Hibernate和iBatis.使用�q�个包你可以把以�?个O/R-mappers�l�合Spring提供的所有功能，如前面提到的��单声明式的事务管理�?BR>5。AOP package 让你可以定义�W�合AOP联盟规范的（AOP规范�l�织�Q�面向面�~�程的具体实玎ͼ��?�Ҏ��拦截和切点，�q�净的给从逻辑说应该被分离的功能实��C��码解耦。��用源码��的元数据功能�Q�你可以把各�U�行��Z��息�ƈ入你的代码中�?BR>6。Web package 提供了基��的web功能�Q�如multipart功能�Q��用servlet listeners初始化contexts。引导web的application context。在使用spring和WebWork或者Struts集成的时候需要整合这个包�?BR>7。Web MVC package 提供了针对web�E�序的MVC实现。它提供了一个清晰的model和web forms的分��，�q�允�怽�使用所有其它的spring框架的功能，如有效性验证（用户提交的信息正��与否的验证�Q��?/FONT>

morcble的blog 2005-12-28 12:14 发表评论