After using the habit of jFinal, spring forgot...
Take another note here
The project structure is as follows
First of all, I used maven of IDEA to process mybatis used by the database framework here. The database is mariadb, and I used FASTJSON when I used json to transfer data to the front desk.
<?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>demo</groupId> <artifactId>demo6</artifactId> <version>1.0-SNAPSHOT</version> <profiles> <profile> <id>jdk-1.8</id> <activation> <jdk>1.8</jdk> </activation> <properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion> </properties> </profile> </profiles> <build> <defaultGoal>compile</defaultGoal> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> <include>**/*.properties</include> </includes> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/**</include> </includes> </resource> </resources> </build> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>5.1.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.2.RELEASE</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.5</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.1.36</version> </dependency> </dependencies> </project>
Then the name of the spring configuration file applicationContext.xml can be changed randomly as long as it is consistent with the web.xml.
<?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" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="cn.erika.*"/> <mvc:annotation-driven/> <bean id="dataConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:datasource.properties"/> </bean> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="${driver}"> </property> <property name="url" value="${url}"> </property> <property name="username" value="${username}"> </property> <property name="password" value="${password}"> </property> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- My mybatis Just configure it mapper It is recommended to write the location of the file separately if other configurations are needed. mybatis The configuration file of is referenced here --> <property name="mapperLocations" value="classpath:cn/erika/mapper/*.xml"/> </bean> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate" destroy-method="close"> <constructor-arg ref="sqlSessionFactory"/> </bean> </beans>
Obviously, you can write the configuration file of the data source by yourself. The configuration of the properties I used, that is, the k-v format, is omitted here.
Next, configure web.xml to add the following content, which is the same as the general selvet.
<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:applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
The environment is finished here, and then the test data.
The code of User.java will not be let go, boring code
UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="cn.erika.mapper.UserMapper"> <resultMap id="UserEntry" type="cn.erika.model.User"> <id property="id" column="id"/> <result property="name" column="name"/> <result property="password" column="password"/> <result property="type" column="type"/> <result property="lastLogin" column="last_login"/> <result property="desc" column="desc"/> </resultMap> <select id="getAll" resultMap="UserEntry"> SELECT * FROM tb_user </select> </mapper>
UserEntry.java is nothing but to reduce the amount of code
UserService.java
package cn.erika.service; import cn.erika.mapper.UserMapper; import cn.erika.model.User; import org.apache.ibatis.session.SqlSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Service; import java.util.List; @Service("userService") public class UserService { private UserMapper mapper; @Autowired public UserService(@Qualifier("sqlSession") SqlSession session) { this.mapper = session.getMapper(UserMapper.class); } public List<User> getAll() { return mapper.getAll(); } }
DemoController.java
package cn.erika.controller;
import cn.erika.service.UserService;
import com.alibaba.fastjson.JSON;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/demo")
public class DemoController{
@Autowired
private UserService service;
@RequestMapping("getAll")
@ResponseBody
public String getAll(){
String json = JSON.toJSONString(service.getAll());
return json;
}
}
Later, I couldn't get up when I was running, and then I found that it was a deployment problem.
Throw all the LIBS in and it's all right... I was so depressed that Baidu didn't find out the reason for half a day.