一、今日完成

今天上午请假逃学半天，下午和晚上找BUG和改BUG

1.在web.xml中配置DispatcherServlet

<servlet>
  <servlet-name>SpringMVC</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:springmvc-config.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
  <async-supported>true</async-supported>
</servlet>
<servlet-mapping>
  <servlet-name>SpringMVC</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

<servlet>和<servlet-mapping>元素中的子元素<servlet-name>必须保持一致，除了大写敏感外，不得有其他任何字符包括空格，否则在部署应用到Tomcat失败，控制台报错，提示启动和初始化applicationContext错误；

2.定义service接口的实现类过程中不得加入abstract 修饰符，否则控制台输出warning和error如下：

[WARN ] 2017-09-05 22:45:50,694(2907) --> [RMI TCP Connection(3)-127.0.0.1] org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546): Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.jnshu.service.PersonService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.annotation.Resource(shareable=true, lookup=, name=, description=, authenticationType=CONTAINER, type=class java.lang.Object, mappedName=)}  

3.IDEA提供了快速检查拼写错误以及配置失败的快捷功能

在不同目录下存在依赖关系的文件名或者路径，按住Ctrl，移动光标至该文件名或路径名上，如有完整的路径提示或者左键单击可以跳转至相应文件界面，说明配置无误，否则存在拼写错误或者路径引用不当；

4.使用log4j输出日志，不仅需要在相应类中定义一个对象变量

private Logger log = Logger.getLogger(PersonController.class);

针对相应类中定义的方法，需要在方法体中调用“log.info(param name)；”等方法，才会在该类相关方法被调用后输出日志

5.针对service层组件中定义的具体方法，创建相应的测试类十分有必要，可以为后期排错省下一大笔麻烦，即使测试类中不搞花里胡哨的测试方法

public class PersonServiceImplTest { 

@Before
public void before() throws Exception { 
} 

@After
public void after() throws Exception { 
} 

/** 
* 
* Method: insertOne(Person one) 
* 
*/ 
@Test
public void testInsertOne() throws Exception { 
//TODO: Test goes here... 
} 

/** 
* 
* Method: updateOne(Person one) 
* 
*/ 
@Test
public void testUpdateOne() throws Exception { 
//TODO: Test goes here... 
} 

/** 
* 
* Method: selectOne(long id) 
* 
*/ 
@Test
public void testSelectOne() throws Exception { 
//TODO: Test goes here... 
} 

/** 
* 
* Method: deleteOne(long id) 
* 
*/ 
@Test
public void testDeleteOne() throws Exception { 
//TODO: Test goes here... 
} 

/** 
* 
* Method: showAll() 
* 
*/ 
@Test
public void testShowAll() throws Exception { 
//TODO: Test goes here... 
} 

} 

6.最后成功把项目部署到Tomcat，并且在postman中测试POST方法成功

@RequestMapping(value = "/list", method = RequestMethod.GET)
public  String  shoeAll(Model model){
    List<Person>     alll_list = oneService.showAll();
    log.info("====>all_list"+alll_list);
    model.addAttribute("all_list", alll_list);
    return "list";

二、明日完成

在controller中补充GET DELETE 和PUT方法，使用postman进行测试

三、遇到的问题

感谢师兄，目前遇到的问题即今日所学，已经基本解决

四、收获

“能发现的bug都不是bug”这条准测得好好学习和领悟。