spring初试.doc

1. 新建项目: file New ProjectWeb Project Next Project Name: spring (项目名)选中 Java EE 5.0 Finish (新建项目完成)2. 加入spring架包,三个主要jar包1)Spring2.5.6softwarespring-framework-2.5.6-with-dependenciesspring-framework-2.5.6dist路劲下的:spring.jar2)Spring2.5.6softwarespring-framework-2.5.6-with-dependenciesspring-framework-2.5.6libjakarta-commons路径下的:commons-logging.jar3)Spring2.5.6softwarespring-framework-2.5.6-with-dependenciesspring-framework-2.5.6liblog4j路径下的:log4j-1.2.15.jar一个配置文件:Spring2.5.6softwarespring-framework-2.5.6-with-dependenciesspring-framework-2.5.6samplesjpetstorewarWEB-INF路径下的:applicationContext.xml其他类库增加spring依赖库，* SPRING_HOME/dist/spring.jar* SPRING_HOME/lib/jakarta-commons/commons-logging.jar* SPRING_HOME/lib/log4j/log4j-1.2.15.jar如果使用了切面编程，还需下列jar文件：libaspectjaspectjweaver.jar和aspectjrt.jarlibcglibcglib-nodep-2.1.3.jar如果使用了jsr-250中的注解，还需要下列jar文件：libj2eecommon-annotations.jar3. 配置applicationContext.xml4. 初始化applicationContext.xml 在servlet中,写上如下代码,加载applicationContext.xml配置文件/初始化springApplicationContext applicationContext=new ClassPathXmlApplicationContext(applicationContext.xml);/获得UserBo实例UserBo userBo=(UserBo)applicationContext.getBean(userBo);异常1:分析:还没有把spring的配置文件applicationContext.xml加载到项目中所以没有读到配置文件没读到配置文件,就没有类的注入,输入保空指针异常解决:在servlet中加上下面两句/初始化springApplicationContext applicationContext = new ClassPathXmlApplicationContext(applicationContext.xml);/获得UserBo实例UserBo userBo=(UserBo)applicationContext.getBean(userBo);异常2:Error creating bean with name userBo defined in class path resource applicationContext.xml: Cannot resolve reference to bean userDao while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named userDao is defined错误创建名为userBo在类路径资源定义applicationContext.xml中豆：无法解析引用豆UserDAO的，而设置构造函数的参数;嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException：名为UserDAO的无豆的定义分析: userBo无法引用UserDAO ;注:跟userBo类中的变量,没有关系解决:把userDao改为UserDao异常3:Error creating bean with name UserBo defined in class path resource applicationContext.xml: 1 constructor arguments specified but no matching constructor found in bean UserBo (hint: specify index and/or type arguments for simple parameters to avoid type ambiguities)错误创建bean的名称为UserBo在类路径资源定义applicationContext.xml中：1构造函数的参数指定但没有匹配的构造函数，豆UserBo（提示发现：指定索