自从学习了springboot和springcloud之后，一直都没有再用ssm。

今天，我决定复习一下ssm搭建，所以做了一个小项目，只有简简单单的查询数据功能，万万没想到，居然给我报了个404。

 

先上代码：以下代码中的注解，有一部分是我个人理解，可能有错误！

applicationContext.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.     xmlns:p="http://www.springframework.org/schema/p"
  5.     xmlns:aop="http://www.springframework.org/schema/aop"
  6.     xmlns:context="http://www.springframework.org/schema/context"
  7.     xmlns:jee="http://www.springframework.org/schema/jee"
  8.     xmlns:tx="http://www.springframework.org/schema/tx"
  9.     xsi:schemaLocation="    
  10.         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  
  11.         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
  12.         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
  13.         http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd  
  14.         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
  15.     
  16.     <context:component-scan base-package="com.learn.ssm">
  17.     <!-- context:component-scan对路径下的文件进行扫描，如果扫描到文件中带有@Service,@Component,@Repository,@Controller等这些注解的类，则把这些类注册为bean 
  18.      -->
  19.         
  20.     </context:component-scan>
  21.         
  22.     <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  23.         <property name="url" value="jdbc:mysql://127.0.0.1:3306/yxktv" />
  24.         <property name="driverClassName" value="com.mysql.jdbc.Driver" />
  25.         <property name="username" value="root" />
  26.         <property name="password" value="x5" />
  27.     </bean>
  28.     
  29.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  30.         <property name="dataSource" ref="dataSource" />
  31.     </bean>
  32.     
  33.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  34.         <property name="basePackage" value="com.learn.ssm.mapper" />
  35.         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
  36.     </bean>
  37. </beans>

springmvc.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.     xmlns:p="http://www.springframework.org/schema/p"
  5.     xmlns:aop="http://www.springframework.org/schema/aop"
  6.     xmlns:context="http://www.springframework.org/schema/context"
  7.     xmlns:jee="http://www.springframework.org/schema/jee"
  8.     xmlns:tx="http://www.springframework.org/schema/tx"
  9.     xmlns:mvc="http://www.springframework.org/schema/mvc"
  10.     xsi:schemaLocation="    
  11.         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  
  12.         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
  13.         http://www.springframework.org/schema/mvc   http://www.springframework.org/schema/mvc/spring-mvc.xsd
  14.         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
  15.         http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd  
  16.         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
  17.  
  18.     <mvc:annotation-driven />
  19.  
  20.     <!-- 静态资源配置 -->
  21.     <mvc:resources mapping="/static/**" location="/static/" />
  22.  
  23.     <!-- 视图解析器 -->
  24.     <bean id="viewResolver"
  25.         class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  26.         <property name="prefix" value="/" />
  27.         <property name="suffix" value=".jsp"></property>
  28.     </bean>
  29.  
  30.     <!-- 使用注解的包，包括子集 -->
  31.     <context:component-scan
  32.         base-package="com.learn.ssm.controller" />
  33.  
  34.  
  35. </beans>

web.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  3.   <display-name>ssm</display-name>
  4.   <context-param><!-- 初始化上下文参数 -->
  5.     <param-name>contextConfigLocation</param-name>
  6.     <param-value>classpath:applicationContext.xml</param-value>
  7.   </context-param>
  8.   <listener><!-- 监听器 用于监听种种操作，也可以自动激发一些操作 -->
  9.     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  10.   </listener>
  11.   <servlet>
  12.     <servlet-name>SpringMVC</servlet-name>
  13.     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  14.     <init-param>
  15.       <param-name>contextConfigLocation</param-name>
  16.       <param-value>classpath:springmvc.xml</param-value>
  17.     </init-param>
  18.     <load-on-startup>1</load-on-startup>
  19.     <!-- load-on-startup 当值为0或者大于0时，表示容器在应用启动时就加载这个servlet；
  20. 当是一个负数时或者没有指定时，则指示容器在该servlet被选择时才加载。
  21. 正数的值越小，启动该servlet的优先级越高。
  22.      -->
  23.   </servlet>
  24.   <servlet-mapping>
  25.     <servlet-name>SpringMVC</servlet-name>
  26.     <url-pattern>*.do</url-pattern>
  27.     <!-- 如果url－pattern定义的是路径，那么以后所有对这个路径下资源的请求都会由servlet－name中定义的servlet处理.
  28.             如果url－pattern定义的是资源格式例如*.do等，那么对于所有符合这种格式的资源的请求都由指定的servlet处理。
  29.      -->
  30.   </servlet-mapping>
  31.   <welcome-file-list>
  32.     <welcome-file>index.html</welcome-file>
  33.   </welcome-file-list>
  34. </web-app>

SsmController.java

package com.learn.ssm.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.learn.ssm.pojo.stu;
import com.learn.ssm.service.SsmService;
@RestController
@CrossOrigin
public class SsmController {
 @Autowired
 SsmService ssmService;
 @GetMapping(“/show”)
 public List<stu> show(){
  return ssmService.show();
 }
}

SsmMapper.xml

package com.learn.ssm.mapper;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import com.learn.ssm.pojo.stu;
@Mapper
public interface SsmMapper {
 @Select(“select * from stu”)
 public List<stu> show();
}

SsmService.xml

  1. package com.learn.ssm.service;
  3. import java.util.List;
  5. import org.springframework.beans.factory.annotation.Autowired;
  6. import org.springframework.stereotype.Service;
  8. import com.learn.ssm.mapper.SsmMapper;
  9. import com.learn.ssm.pojo.stu;
  11. @Service
  12. public class SsmService {
  13.     @Autowired
  14.     SsmMapper ssmMapper;
  15.     public List<stu> show(){
  16.         return ssmMapper.show();
  17.     }
  18. }

stu.java

  1. package com.learn.ssm.pojo;
  3. public class stu {
  4.     
  5.     String name;
  6.     String sex;
  7.     int id;
  8.     int age;
  9.     int date;
  10.     int classs;
  11.     int tall;
  12.     int num;
  13.     public String getName() {
  14.         return name;
  15.     }
  16.     public void setName(String name) {
  17.         this.name = name;
  18.     }
  19.     public String getSex() {
  20.         return sex;
  21.     }
  22.     public void setSex(String sex) {
  23.         this.sex = sex;
  24.     }
  25.     public int getId() {
  26.         return id;
  27.     }
  28.     public void setId(int id) {
  29.         this.id = id;
  30.     }
  31.     public int getAge() {
  32.         return age;
  33.     }
  34.     public void setAge(int age) {
  35.         this.age = age;
  36.     }
  37.     public int getDate() {
  38.         return date;
  39.     }
  40.     public void setDate(int date) {
  41.         this.date = date;
  42.     }
  43.     public int getClasss() {
  44.         return classs;
  45.     }
  46.     public void setClasss(int classs) {
  47.         this.classs = classs;
  48.     }
  49.     public int getTall() {
  50.         return tall;
  51.     }
  52.     public void setTall(int tall) {
  53.         this.tall = tall;
  54.     }
  55.     public int getNum() {
  56.         return num;
  57.     }
  58.     public void setNum(int num) {
  59.         this.num = num;
  60.     }
  61.     
  62. }

 

 当我在浏览器中输入http://localhost:8080/show.do时，报404，原因是我这个地址写错了，应该是http://localhost:8080/ssm20190627/show.do。

被自己蠢哭了… …

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本文链接：https://www.cnblogs.com/wxdmw/p/11099558.html