操作JBuilder 2005开拓Spring实例

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1. 下载spring包，网址如下：

http://www.springframework.org/download.html

解压后的目次中包括了dist、lib等子目次

2. 在JBuilder2005中增加spring库，选择菜单Tools-Configure-Libraries，在弹出的对话框中点击New按钮，输入spring库的名称：spring，点击Add按钮，将dist目次中的所有jar文件增加到spring库中

3. 新建工程文件，选菜单File-New Project，给工程文件取名为myProject

配置工程文件的属性，选菜单Project-Project Properties，选择Tomcat作为处事器，将spring库插手Path/Required Libraries。因为例子顶用到了log4j，将包括了log4j的库插手Path/Required Libraries，留意到lib目次下有两个子目次log4j和jakarta-commons，它们的用法是差异的,如下面的代码片段所示：

log4j

import org.apache.log4j.Level; import org.apache.log4j.Logger; public class SpringappController implements Controller { 　 /** Logger for this class and subclasses */ 　 static Logger logger = Logger.getLogger(SpringappController.class); 　 jakarta-commons 　 import org.apache.commons.logging.Log; 　 import org.apache.commons.logging.LogFactory; 　 public class SpringappController implements Controller { 　　 /** Logger for this class and subclasses */ 　　 protected final Log logger = LogFactory.getLog(getClass());

4. 新建Web模块，选菜单File-New，给Web模块取名为springapp

5. 新建hello.jsp文件如下：

<%@ page contentType="text/html; charset=Big5" %> <html> 　 <head><title>Example :: Spring Application</title></head> <body> 　 <h1>Hello - Spring Application</h1> 　 <p>Greetings.</p> </body> </html>

6. 新建类文件SpringappController.java如下：

package spring; import org.springframework.web.servlet.mvc.Controller; import org.springframework.web.servlet.ModelAndView; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; //import org.apache.commons.logging.Log; //import org.apache.commons.logging.LogFactory; import org.apache.log4j.Level; import org.apache.log4j.Logger; public class SpringappController implements Controller { 　 /** Logger for this class and subclasses */ 　 // protected final Log logger = LogFactory.getLog(getClass()); 　 static Logger logger = Logger.getLogger(SpringappController.class); 　 public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) 　 throws ServletException, IOException { 　　 logger.info("SpringappController - returning hello view"); 　　 return new ModelAndView("hello.jsp"); 　 } }

7. 修改web.xml文件

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE web-app PUBLIC '-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN' 'http://java.sun.com/dtd/web-app_2_3.dtd'> <web-app> 　 <servlet> 　　 <servlet-name>springapp</servlet-name> 　　 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 　　 <load-on-startup>1</load-on-startup> 　 </servlet> 　 <servlet-mapping> 　　 <servlet-name>springapp</servlet-name> 　　 <url-pattern>*.htm</url-pattern> 　 </servlet-mapping> 　 <welcome-file-list> 　　 <welcome-file> 　　　 index.jsp 　　 </welcome-file> 　 </welcome-file-list> </web-app>

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8. 在web-inf目次中新建springapp-servlet.xml文件如下

9. 在web-inf目次中新建log4j.properties文件如下：

log4j.rootCategory=INFO, stdout, logfile log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - <%m>%n log4j.appender.logfile=org.apache.log4j.RollingFileAppender log4j.appender.logfile.File=springapp.log log4j.appender.logfile.MaxFileSize=512KB # Keep three backup files log4j.appender.logfile.MaxBackupIndex=3 log4j.appender.logfile.layout=org.apache.log4j.PatternLayout #Pattern to output : date priority [category] - <message>line_separator log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - <%m>%n

10. 配置web模块springapp的属性Content，插手文件log4j.properties，因为classes目次是自动发生的，这一步是为了把文件log4j.properties加到classes目次。

11. 配置Run Configuration，选菜单Run-Configurations，新建一个Run Configuration，Type选Server，Launch URI配置为：/springapp/hello.htm，给它取名为hello

12. 运行，你会在messages窗口中看到如下信息：

資訊: Server startup in 9253 ms

2004-11-05 15:05:00,585 INFO [spring.SpringappController] – <SpringappController – returning hello view>

2004/11/5 下午 03:05:00 org.springframework.web.servlet.view.AbstractCachingViewResolver resolveViewName

資訊: Cached view ‘hello.jsp’

在myProject/Tomcat/springapp.log文件中增加了一行如下所示：

2004-11-05 15:11:32,348 INFO [spring.SpringappController] – <SpringappController – returning hello view>

这说明你已乐成成立了根基的spring应用。

jstl的支持，配置工程文件的属性，选菜单Project-Project Properties，将jstl库插手Path/Required Libraries。

14. 改造前面的例子，改造的文件如下：

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增加“header”文件include.jsp，这是一些jsp文件的公用部门，这样可以使得开拓和维护更容易。所有jsp文件放在web-inf/jsp目次下，为的是只有Controller可以会见View。

springapp/war/WEB-INF/jsp/include.jsp

<%@ page session="false"%> <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %> <%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt" %>

操作JSTL，<c:redirect>将页面重定向到Controller，这样就成立了index.jsp和应用架构的接洽。

springapp/war/index.jsp

<%@ include file="/WEB-INF/jsp/include.jsp" %> <%-- Redirected because we can't set the welcome page to a virtual URL. --%> <c:redirect url="/hello.htm"/>

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操作JSTL的<c:out>标志，把从Model提取的，通报给View的当前日期和时间作为输出。

springapp/war/WEB-INF/jsp/hello.jsp

<%@ include file="/WEB-INF/jsp/include.jsp" %> <html> <head><title>Hello :: Spring Application</title></head> <body> 　 <h1>Hello - Spring Application</h1> 　 <p>Greetings, it is now <c:out value="${now}"/> 　 </p> </body> </html>

在SpringappController.java中增加包括了当前日期和时间的string作为Model

springapp/src/SpringappController.java

import org.springframework.web.servlet.mvc.Controller; import org.springframework.web.servlet.ModelAndView; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class SpringappController implements Controller { 　 /** Logger for this class and subclasses */ 　 protected final Log logger = LogFactory.getLog(getClass()); 　 public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) 　 throws ServletException, IOException { 　　 String now = (new java.util.Date()).toString(); 　　 logger.info("returning hello view with " + now); 　　 return new ModelAndView("WEB-INF/jsp/hello.jsp", "now", now); 　 } }

15. 欣赏改造后的功效http://localhost:8080/springapp，首先会见index.jsp，然后重定向到hello.htm，接著把节制交给Controller，Controller把日期和时间传送给View。

只能在欣赏器这样测试。在JBuilder2005中配置Run Configuration不能会见http://localhost:8080/springapp，但可以会见http://localhost:8080/springapp/index.jsp

在上面的例子中，Controller指定了View的完全路径，使得Controller和View之间存在不须要的依赖。为了移出这种依赖，我们可以用类ResourceBundleViewResolver 和 a SimpleUrlHandlerMapping在属性文件中界说这种依赖，对付简朴的景象，我们也可以操作InternalResourceViewResolver配置前缀和后缀，下面就用第二种要领。修改文件springapp-servlet.xml包括ViewResolver配置，我们还选择利用JstlView，这使得我们可以团结利用JSTL和message resource bundles，因此可以支持国际化。

springapp/war/WEB-INF/springapp-servlet.xml

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此刻，我们就可以移出Controller中View名称的前缀和后缀了。

springapp/src/SpringappController.java import org.springframework.web.servlet.mvc.Controller; import org.springframework.web.servlet.ModelAndView; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class SpringappController implements Controller { 　 /** Logger for this class and subclasses */ 　 protected final Log logger = LogFactory.getLog(getClass()); 　　 public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) 　 throws ServletException, IOException { 　　 String now = (new java.util.Date()).toString(); 　　 logger.info("returning hello view with " + now); 　　 return new ModelAndView("hello", "now", now); 　 } }

这样修改后的例子应该仍能运行。

16. 增加贸易逻辑类

为了分隔Web逻辑和贸易逻辑，我们成立两个差异的包，web和bus

springapp/src/bus/Product.java

package bus; import java.io.Serializable; public class Product implements Serializable { 　 private String description; 　 private Double price; 　 public void setDescription(String s) { 　　 description = s; 　 } 　 public String getDescription() { 　　 return description; 　 } 　 public void setPrice(Double d) { 　　 price = d; 　 } 　 public Double getPrice() { 　　 return price; 　 } }

springapp/src/bus/ProductManager.java

package bus; import java.io.Serializable; import java.util.List; public class ProductManager implements Serializable { 　 private List products; 　 public void setProducts(List p) { 　　 products = p; 　 } 　 public List getProducts() { 　　 return products; 　 } }

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修改SpringappController.java

springapp/src/web/SpringappController.java

package web; import org.springframework.web.servlet.mvc.Controller; import org.springframework.web.servlet.ModelAndView; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.Map; import java.util.HashMap; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import bus.Product; import bus.ProductManager; public class SpringappController implements Controller { 　 /** Logger for this class and subclasses */ 　 protected final Log logger = LogFactory.getLog(getClass()); 　 private ProductManager prodMan; 　 public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) 　 throws ServletException, IOException { 　　 String now = (new java.util.Date()).toString(); 　　 logger.info("returning hello view with " + now); 　　 Map myModel = new HashMap(); 　　 myModel.put("now", now); 　　 myModel.put("products", getProductManager().getProducts()); 　　 return new ModelAndView("hello", "model", myModel); 　 } 　 public void setProductManager(ProductManager pm) { 　　 prodMan = pm; 　 } 　 public ProductManager getProductManager() { 　　 return prodMan; 　 } }

17. 修改View以便显示贸易数据，增加对message bundle的支持

springapp/war/WEB-INF/jsp/hello.jsp

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<%@ include file="/WEB-INF/jsp/include.jsp" %> <html> <head><title><fmt:message key="title"/></title></head> <body> <h1><fmt:message key="heading"/></h1> <p><fmt:message key="greeting"/> <c:out value="${model.now}"/> </p> <h3>Products</h3> <c:forEach items="${model.products}" var="prod"> <c:out value="${prod.description}"/> <i>$<c:out value="${prod.price}"/></i><br><br> </c:forEach> </body> </html>

18. 增加一些测试数据

我们此刻还不规划增加代码，从数据库装载贸易工具。我们只springapp-servlet.xml中增加bean和messageSource配置，提供一些测试数据和对messages resource bundle的支持。

springapp/war/WEB-INF/springapp-servlet.xml

19. 增加message bundle

springapp/war/WEB-INF/classes/messages.properties

title=SpringApp heading=Hello :: SpringApp greeting=Greetings, it is now

20. 欣赏改造后的功效http://localhost:8080/springapp

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实现数据库耐久层

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21. 配置HSQL数据库，在JBuilder2005中增加HSQL库，选择菜单Tools-Configure-Libraries，在弹出的对话框中点击New按钮，输入HSQL库的名称：HSQL，点击Add按钮，将lib/hsqldb目次下的文件hsqldb.jar增加到HSQL库中。

选择菜单Enterprise-Enterprise Setup，在弹出的对话框中选择Database Drivers，按Add按钮增加HSQL库。

选择菜单Tools-Database Pilot，然后选择菜单Files-New输入Driver：org.hsqldb.jdbcDriver，URL：jdbc:hsqldb:db/test，双击hsqldb:db/test，输入UserName：sa，不必输入Passsword。输入如下的SQL语句并执行

CREATE TABLE products ( id INTEGER NOT NULL PRIMARY KEY, description varchar(255), price decimal(15,2) ); CREATE INDEX products_description ON products(description); INSERT INTO products (id, description, price) values(1, 'Lamp', 5.78); INSERT INTO products (id, description, price) values(2, 'Table', 75.29); INSERT INTO products (id, description, price) values(3, 'Chair', 22.81);

这样就会在JBuilder_Home/bin目次下建设一个目次db，存放了数据库test的数据

22. 建设JDBC DAO (Data Access Object)实现

springapp/src/db/ProductManagerDao.java

package db; import bus.Product; import java.util.List; public interface ProductManagerDao { public List getProductList(); public void increasePrice(Product prod, int pct); }

springapp/src/db/ProductManagerDaoJdbc.java

package db; import bus.Product; import java.util.List; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Types; import javax.sql.DataSource; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.jdbc.object.MappingSqlQuery; import org.springframework.jdbc.object.SqlUpdate; import org.springframework.jdbc.core.SqlParameter; public class ProductManagerDaoJdbc implements ProductManagerDao { 　 /** Logger for this class and subclasses */ 　 protected final Log logger = LogFactory.getLog(getClass()); 　 private DataSource ds; 　 public List getProductList() { 　　 logger.info("Getting products!"); 　　 ProductQuery pq = new ProductQuery(ds); 　　 return pq.execute(); 　 } 　 public void increasePrice(Product prod, int pct) { 　　 logger.info("Increasing price by " + pct + "%"); 　　 SqlUpdate su = new SqlUpdate(ds, "update products set price = price * (100 + ?) / 100 where id = ?"); 　　 su.declareParameter(new SqlParameter("increase", Types.INTEGER)); 　　 su.declareParameter(new SqlParameter("ID", Types.INTEGER)); 　　 su.compile(); 　　 Object[] oa = new Object[2]; 　　 oa[0] = new Integer(pct); 　　 oa[1] = new Integer(prod.getId()); 　　 int count = su.update(oa); 　　 logger.info("Rows affected: " + count); 　 } 　 public void setDataSource(DataSource ds) { 　　 this.ds = ds; 　 } 　 class ProductQuery extends MappingSqlQuery { 　　 ProductQuery(DataSource ds) { 　　　 super(ds, "SELECT id, description, price from products"); 　　　 compile(); 　　 } 　　 protected Object mapRow(ResultSet rs, int rowNum) throws SQLException { 　　　 Product prod = new Product(); 　　　 prod.setId(rs.getInt("id")); 　　　 prod.setDescription(rs.getString("description")); 　　　 prod.setPrice(new Double(rs.getDouble("price"))); 　　　 return prod; 　　 } 　 } }

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springapp/src/bus/Product.java

package bus; import java.io.Serializable; public class Product implements Serializable { private int id; private String description; private Double price; public void setId(int i) { id = i; } public int getId() { return id; } public void setDescription(String s) { description = s; } public String getDescription() { return description; } public void setPrice(Double d) { price = d; } public Double getPrice() { return price; } }

springapp/src/test/TestProductManagerDaoJdbc.java

package tests; import java.util.List; import java.util.ArrayList; import junit.framework.TestCase; import org.springframework.jdbc.datasource.DriverManagerDataSource; import db.ProductManagerDaoJdbc; import bus.Product; public class TestProductManagerDaoJdbc extends TestCase { private ProductManagerDaoJdbc pmdao; public void setUp() { pmdao = new ProductManagerDaoJdbc(); DriverManagerDataSource ds = new DriverManagerDataSource(); ds.setDriverClassName("org.hsqldb.jdbcDriver"); ds.setUrl("jdbc:hsqldb:db/test"); ds.setUsername("sa"); ds.setPassword(""); pmdao.setDataSource(ds); } public void testGetProductList() { List l = pmdao.getProductList(); Product p1 = (Product) l.get(0); assertEquals("Lamp", p1.getDescription()); Product p2 = (Product) l.get(1); assertEquals("Table", p2.getDescription()); } public void testIncreasePrice() { List l1 = pmdao.getProductList(); Product p1 = (Product) l1.get(0); assertEquals(new Double("5.78"), p1.getPrice()); pmdao.increasePrice(p1, 10); List l2 = pmdao.getProductList(); Product p2 = (Product) l2.get(0); assertEquals(new Double("6.36"), p2.getPrice()); } }

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23. 修改Web应用使其利用数据库耐久层

springapp/src/bus/ProductManager.java

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package bus; import java.io.Serializable; import java.util.ListIterator; import java.util.List; import db.ProductManagerDao; public class ProductManager implements Serializable { private ProductManagerDao pmd; private List products; public void setProductManagerDao(ProductManagerDao pmd) { this.pmd = pmd; } /* public void setProducts(List p) { products = p; } */ public List getProducts() { products = pmd.getProductList(); return products; } public void increasePrice(int pct) { ListIterator li = products.listIterator(); while (li.hasNext()) { Product p = (Product) li.next(); /* double newPrice = p.getPrice().doubleValue() * (100 + pct)/100; p.setPrice(new Double(newPrice)); */ pmd.increasePrice(p, pct); } } }

springapp/war/WEB-INF/springapp-servlet.xml

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">  <beans>  <bean id="springappController" class="web.SpringappController"> <property name="productManager"> <ref bean="prodMan"/> </property> </bean>  <bean id="priceIncreaseValidator" class="bus.PriceIncreaseValidator"/> <bean id="priceIncreaseForm" class="web.PriceIncreaseFormController"> <property name="sessionForm"><value>true</value></property> <property name="commandName"><value>priceIncrease</value></property> <property name="commandClass"><value>bus.PriceIncrease</value></property> <property name="validator"><ref bean="priceIncreaseValidator"/></property> <property name="formView"><value>priceincrease</value></property> <property name="successView"><value>hello.htm</value></property> <property name="productManager"> <ref bean="prodMan"/> </property> </bean> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName"><value>org.hsqldb.jdbcDriver</value></property> <property name="url"> <value>jdbc:hsqldb:/home/trisberg/workspace/springapp/db/test</value> </property> <property name="username"><value>sa</value></property> <property name="password"><value></value></property> </bean> <bean id="prodManDao" class="db.ProductManagerDaoJdbc"> <property name="dataSource"> <ref bean="dataSource"/> </property> </bean> <bean id="prodMan" class="bus.ProductManager"> <property name="productManagerDao"> <ref bean="prodManDao"/> </property>  </bean>  <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> <property name="basename"><value>messages</value></property> </bean> <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <props> <prop key="/hello.htm">springappController</prop> <prop key="/priceincrease.htm">priceIncreaseForm</prop> </props> </property> </bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass"> <value>org.springframework.web.servlet.view.JstlView</value> </property> <property name="prefix"><value>/WEB-INF/jsp/</value></property> <property name="suffix"><value>.jsp</value></property> </bean> </beans>

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springapp/src/tests/MockProductManagerDaoImpl.java

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package tests; import bus.Product; import java.util.List; import db.ProductManagerDao; import bus.Product; public class MockProductManagerDaoImpl implements ProductManagerDao { private List products; public void setProducts(List p) { products = p; } public List getProductList() { return products; } public void increasePrice(Product prod, int pct) { double newPrice = prod.getPrice().doubleValue() * (100 + pct)/100; prod.setPrice(new Double(newPrice)); } }

springapp/src/tests/WEB-INF/springapp-servlet.xml

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springapp/src/tests/TestProductManager .java

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package tests; import java.util.List; import java.util.ArrayList; import junit.framework.TestCase; import db.ProductManagerDao; import bus.ProductManager; import bus.Product; public class TestProductManager extends TestCase { private ProductManager pm; public void setUp() { pm = new ProductManager(); Product p = new Product(); p.setDescription("Chair"); p.setPrice(new Double("20.50")); ArrayList al = new ArrayList(); al.add(p); p = new Product(); p.setDescription("Table"); p.setPrice(new Double("150.10")); al.add(p); /* pm.setProducts(al); */ MockProductManagerDaoImpl pmdao = new MockProductManagerDaoImpl(); pmdao.setProducts(al); pm.setProductManagerDao(pmdao); pm.getProducts(); } public void testGetProducs() { List l = pm.getProducts(); Product p1 = (Product) l.get(0); assertEquals("Chair", p1.getDescription()); Product p2 = (Product) l.get(1); assertEquals("Table", p2.getDescription()); } public void testIncreasePrice() { pm.increasePrice(10); List l = pm.getProducts(); Product p = (Product) l.get(0); assertEquals(new Double("22.55"), p.getPrice()); p = (Product) l.get(1); assertEquals(new Double("165.11"), p.getPrice()); } }

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