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SSM integration
2022-07-24 05:21:00 【x0757】
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1 ssm The principle of integration
2 Create a MAVEN-web engineering
4. To write spring The configuration file
6. generator The generated code
1 ssm The principle of integration
2 Create a MAVEN-web engineering
And replace web.xml file
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
</web-app>
3. Add dependency
<?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.xzj</groupId>
<artifactId>mySSM01</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>6</source>
<target>6</target>
</configuration>
</plugin>
</plugins>
</build>
<packaging>war</packaging>
<dependencies>
<!--spring-webmvc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.15.RELEASE</version>
</dependency>
<!--mybatis rely on -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.6</version>
</dependency>
<!--mybatis and spring Integration dependency -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!--mysql drive -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
<!--druid Connection pool dependency -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.1</version>
</dependency>
<!--lombok rely on -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
</dependency>
<!--jackson java Object to json object @ResponseBody-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.13.2.2</version>
</dependency>
<!--servlet-api rely on -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.15.RELEASE</version>
</dependency>
<!--generator-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.4.0</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.30</version>
</dependency>
</dependencies>
</project>
4. To write spring The configuration file
<?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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- Package scanning -->
<context:component-scan base-package="com.xzj"/>
<!-- Opening of special notes -->
<mvc:annotation-driven/>
<!-- Static resource release -->
<mvc:default-servlet-handler/>
<!-- Interceptor -->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<mvc:exclude-mapping path="/login"/>
<mvc:exclude-mapping path="/login/findAll"/>
<mvc:exclude-mapping path="/js/**"/>
<mvc:exclude-mapping path="/css/**"/>
<mvc:exclude-mapping path="/imgs/**"/>
<bean class="com.xzj.interceptor.MyInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
<!-- Data source configuration -->
<bean id="ds" class="com.alibaba.druid.pool.DruidDataSource">
<!-- Driver name -->
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Asia/Shanghai"/>
<property name="username" value="root"/>
<property name="password" value="pAssW0rd"/>
<!-- Number of initialized connection pools -->
<property name="initialSize" value="5"/>
<!-- At least the number -->
<property name="minIdle" value="5"/>
<!-- Maximum number -->
<property name="maxActive" value="10"/>
<!-- The maximum waiting time unit is milliseconds -->
<property name="maxWait" value="3000"/>
</bean>
<!--sqlSessionFactory Integrate mybaits-->
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="ds"/>
<!-- Set up mybatis Path to map file -->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>
<!-- by dao Interface to generate proxy implementation classes -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- by com.xzj.dao The interface under the package generates a proxy implementation class -->
<property name="basePackage" value="com.xzj.dao"/>
</bean>
</beans>Interceptors use
package com.xzj.interceptor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.xzj.util.CommonResult;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.PrintWriter;
public class MyInterceptor implements HandlerInterceptor {
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
response.setContentType("session/json;charset=utf-8");
HttpSession session = request.getSession();
Object user = session.getAttribute("user");
if(user!=null){
return true;
}
PrintWriter writer = response.getWriter();
CommonResult result = new CommonResult(5001," Please log in first ",null);
ObjectMapper objectMapper = new ObjectMapper();
String json = objectMapper.writeValueAsString(result);
writer.print(json);
writer.flush();
writer.close();
return false;
}
}
5. To configure web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- load springmvc To configure -->
<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.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>
</web-app>
To configure tomcat And start the
The lack of : <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.15.RELEASE</version>
</dependency>
If you start tomcat Problems occur when , So it could be spring Error in configuration file .
6. generator The generated code
(1) rely on
<!--generator-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.4.0</version>
</dependency>
(2) The configuration file
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!-- Find you. mysql drive jar The location of -->
<classPathEntry location="E:\Maven\repMaven\mysql\mysql-connector-java\8.0.28\mysql-connector-java-8.0.28.jar"/>
<context id="DB2Tables" targetRuntime="MyBatis3">
<!-- Eliminate comments -->
<commentGenerator>
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!-- Configuration information of data source -->
<jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Asia/Shanghai"
userId="root"
password="pAssW0rd">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!--java Configuration of entity class -->
<javaModelGenerator targetPackage="com.xzj.entity" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- Mapping file configuration -->
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!--dao Configuration of data access layer -->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.xzj.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!-- Mapping relationship between database tables and entities
schema: Database name
tableName: Table name
domainObjectName: Entity class name
enableUpdateByExample: Whether to generate complex modification operations
-->
<table schema="mybatis" tableName="tb_user01" domainObjectName="User" enableCountByExample="false"
enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false">
</table>
<table schema="mybatis" tableName="student01" domainObjectName="Student" enableCountByExample="false"
enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false">
</table>
</context>
</generatorConfiguration>(3) test
public class TestGeneratory {
public static void main(String[] args) throws Exception {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("generator.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
}
}
7. add to sql journal
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
log4j.properties
log4j.rootLogger=DEBUG, Console
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
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