SpringMVC+Maven+Mybatis项目搭建（IDEA）

刺骨的言语ヽ痛彻心扉 2022-05-22 02:52 185阅读 0赞

此篇随笔旨在记录搭建过程中自己遇到的一些问题。

源码下载地址：[https://download.csdn.net/download/fakerswe/10501961][https_download.csdn.net_download_fakerswe_10501961]

**第一部分：项目目录及全部代码**

**1.项目目录结构（简体和扩展体目录）**

![70][]

![70 1][]

**2.Controller层代码之Hello类**

package com.iyungu.phantaci.controller; import com.iyungu.phantaci.enums.ExceptionCode; import com.iyungu.phantaci.po.UUser; import com.iyungu.phantaci.service.HelloService; import com.iyungu.phantaci.vo.Message; import com.iyungu.phantaci.vo.ResponseUtil; import com.iyungu.phantaci.vo.test.People; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import java.util.HashMap; import java.util.Map; @Controller @RequestMapping(value = "/ph") public class Hello { @Autowired private HelloService helloService; private static final Logger logger = Logger.getLogger(Hello.class); //测试视图解析器 @GetMapping(value = "/first.do") public String showHello(String words,Map<String, Object> toJspDataMap) { if (words == null) { return "test/hello"; } toJspDataMap.put("words",words); return "test/succ"; } //测试@ResponseBody注解是否正常返回JSON数据 @GetMapping(value = "/getUserInfo.do") @ResponseBody public Map<String,Object> getUserInfo(String words) { Map<String,Object> userInfo = new HashMap<String, Object>(); userInfo.put("name","JayCh0u"); userInfo.put("sex",1); userInfo.put("age",23); return userInfo; } //测试数据库是否正常连接 @GetMapping(value = "/getUserInfoById.do") @ResponseBody public Message getUserInfoById(Long userId) { if (userId == null) { return ResponseUtil.reponseBody(ExceptionCode.REQUEST_PARAM_ERROR.getCode(),ExceptionCode.REQUEST_PARAM_ERROR.getMsg()); } UUser user = helloService.getUserInfoById(userId); return ResponseUtil.responseBody(user); } //测试日志打印 @GetMapping(value = "/getPeople.do") @ResponseBody public Message getPeople() { logger.debug("getPeople()方法执行"); People people = new People(); try { int i = 3/0; } catch (Exception e) { logger.error("no zero"); e.printStackTrace(); } people.setName("Stephen Chou"); logger.debug("getPeople()方法结束"); return ResponseUtil.responseBody(people); } }

**3.Spring配置**

(1)spring-context.xml

补充：Spring 通过一个 BeanPostProcessor 对 @Autowired 进行解析，所以要让 @Autowired 起作用必须事先在 Spring 容器中声明 AutowiredAnnotationBeanPostProcessor Bean。

(2)spring-mvc.xml

（3）spring-mybatis

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
        <context:property-placeholder location="classpath:jdbc.properties"/>
        
        <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
            <property name="driverClassName" value="${jdbc.driver}"/>
            <property name="url" value="${jdbc.url}"/>
            <property name="username" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
            <property name="maxActive" value="30"/>
            <property name="maxIdle" value="5"/>
        </bean>
    
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            
            <property name="dataSource" ref="dataSource"></property>
            
            <property name="mapperLocations" value="classpath:com/iyungu/*/mapper/*Mapper.xml"></property>
    
        </bean>
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            
            <property name="basePackage" value="com.iyungu.*.dao"></property>
            <property name="SqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        </bean>
    
    </beans>

**4.web配置**

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.4"
             xmlns="http://java.sun.com/xml/ns/j2ee"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    
      <display-name>Archetype Created Web Application</display-name>
    
      
      <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*:/spring/spring-*.xml</param-value>
        </init-param>
        
        <load-on-startup>1</load-on-startup>
      </servlet>
      
      <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        
        <url-pattern>*.do</url-pattern>
      </servlet-mapping>
    
    </web-app>

**5.pom文件**

<?xml version="1.0" encoding="UTF-8"?>
    
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
    
      <groupId>com.iyungu</groupId>
      <artifactId>demo-one</artifactId>
      <version>1.0-SNAPSHOT</version>
      <packaging>war</packaging>
    
      <name>demo-one Maven Webapp</name>
      
      <url>http://www.example.com</url>
    
      <properties>
        
        <spring.version>4.3.12.RELEASE</spring.version>
        
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        
        <junit.version>4.12</junit.version>
        
        <mybatis.version>3.2.1</mybatis.version>
        <shiro.version>1.2.5</shiro.version>
      </properties>
    
      <dependencies>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aop</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aspects</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>${spring.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>${spring.version}</version>
        </dependency>
    
    
        
        <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.12</version>
        </dependency>
    
        
        <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-core</artifactId>
          <version>2.9.0</version>
        </dependency>
        <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-databind</artifactId>
          <version>2.9.0</version>
        </dependency>
        <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-annotations</artifactId>
          <version>2.9.0</version>
        </dependency>
        
        <dependency>
          <groupId>org.projectlombok</groupId>
          <artifactId>lombok</artifactId>
          <version>1.16.18</version>
        </dependency>
    
        
        <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.19</version>
        </dependency>
        
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.4.3</version>
        </dependency>
        
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.3.0</version>
        </dependency>
        
        <dependency>
          <groupId>commons-dbcp</groupId>
          <artifactId>commons-dbcp</artifactId>
          <version>1.2.2</version>
        </dependency>
    
    
        
        <dependency>
          <groupId>org.apache.commons</groupId>
          <artifactId>commons-lang3</artifactId>
          <version>3.6</version>
        </dependency>
    
        <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
        </dependency>
        <dependency>
          <groupId>taglibs</groupId>
          <artifactId>standard</artifactId>
          <version>1.1.2</version>
        </dependency>
      </dependencies>
    
    
      <profiles>
        <profile>
          <id>dev</id>
          <properties>
            <profiles.active>dev</profiles.active>
          </properties>
          <activation>
            <activeByDefault>true</activeByDefault>
          </activation>
        </profile>
        <profile>
          <id>test</id>
          <properties>
            <profiles.active>test</profiles.active>
          </properties>
        </profile>
        <profile>
          <id>prod</id>
          <properties>
            <profiles.active>prod</profiles.active>
          </properties>
        </profile>
      </profiles>
    
    
      <build>
        <finalName>demo-one</finalName>
        <pluginManagement>
          <plugins>
            <plugin>
              <artifactId>maven-clean-plugin</artifactId>
              <version>3.0.0</version>
            </plugin>
            
            <plugin>
              <artifactId>maven-resources-plugin</artifactId>
              <version>3.0.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-compiler-plugin</artifactId>
              <version>3.7.0</version>
            </plugin>
            <plugin>
              <artifactId>maven-surefire-plugin</artifactId>
              <version>2.20.1</version>
            </plugin>
            <plugin>
              <artifactId>maven-war-plugin</artifactId>
              <version>3.2.0</version>
            </plugin>
            <plugin>
              <artifactId>maven-install-plugin</artifactId>
              <version>2.5.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-deploy-plugin</artifactId>
              <version>2.8.2</version>
            </plugin>
          </plugins>
        </pluginManagement>
    
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                  <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
          <resource>
            <directory>src/main/filters/${profiles.active}</directory>
            <filtering>true</filtering>
          </resource>
          <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
          </resource>
        </resources>
      </build>
    </project>

**6.两个JSP页面**

（1）hello.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
            no words,no message.over
    </body>
    </html>

（2）succ.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
        congratulations on visiting jsp . Hello,${words}。
    </body>
    </html>

**第二部分：搭建过程中遇到的种种问题**

**1.问题：无法new一个java类**

![70 2][]

**解决：右键java目录，Mark Directory as -->Sources Root**

![70 3][]

2.问题：controller里的接口调不通，debug打的断点也是实心圆

解决：最后排查出来，是我的包路径有错。下面上图

![70 4][]

![70 5][]

3.问题：Hello类中的一个接口使用了@ResponseBody注解，返回没达到预期的json数据，却是500报错。

解决：在pom文件中，没有加入相关的依赖：jackson的相关依赖（可以在文章第一部分的pom文件中找到）。

[https_download.csdn.net_download_fakerswe_10501961]: https://download.csdn.net/download/fakerswe/10501961
[70]: /images/20220522/e9743afe72ca4fe4bb74d71ed9c2a16c.png
[70 1]: /images/20220522/bdf64906cce14fcbbda9968c00c6357d.png
[70 2]: /images/20220522/e61fddb3b2f348139c22aae5c2686709.png
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[70 5]: /images/20220522/e01c442bd564427b8e9d6bd078696eb4.png