文章目录

Mysql
- 本机数据库连接配置文件
Maven
- 找不到资源问题解决
- 驱动
Mybatis
- MybatisUtils
- mapper
- Mybatis-config.xml
Spring
- Maven依赖
- beans.xml
- 添加注解支持后的xml
- 两种命名（p命名、c命名）
- - p命名
  - c命名
- 通用的代理类
- Aop的Maven依赖
SpringMVC
- web.xml配置文件
- Springmvc-servlet.xml
- 解决乱码问题
IDEA使用
- 创建时的自动生成注释

Mysql

本机数据库连接配置文件

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/数据库名?useSSL=false
username=root
password=root

Maven

找不到资源问题解决

<build><resources><resource><directory>src/main/resources</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>true</filtering></resource><resource><directory>src/main/java</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>true</filtering></resource></resources></build>

驱动

<!--mysqlq驱动-->
<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.12</version>
</dependency>
<!--mybatis-->
<dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.5</version>
</dependency>
<!--junit-->
<dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope>
</dependency>
<!-- log4j -->
<dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version>
</dependency>
<!--lombok-->
<dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.10</version><scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.3.9</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.3.9</version>
</dependency>
<!-- Aop依赖 -->
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.9.4</version>
</dependency>

Mybatis

MybatisUtils

package utils;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;import java.io.IOException;
import java.io.InputStream;public class MybatisUtils {private static SqlSessionFactory sqlSessionFactory;static {try {String resource = "mybatis-config.xml";InputStream inputStream = Resources.getResourceAsStream(resource);sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);} catch (IOException e) {e.printStackTrace();}}//获取SqlSession连接public static SqlSession getSession() {//若设置自动提交，括号内填truereturn sqlSessionFactory.openSession(true);}
}

mapper

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.hkd.dao.BlogMapper"></mapper>

Mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><!--导入外部配置文件--><properties resource="db.properties"/><settings><!--开启日志--><setting name="logImpl" value="STDOUT_LOGGING"/><!--允许类中字段采用驼峰命名方式与数据库不一致--><setting name="mapUnderscoreToCamelCase" value="true"/></settings><!--起别名--><typeAliases><package name="com.hkd.pojo"/></typeAliases><environments default="development"><environment id="development"><transactionManager type="JDBC"/><dataSource type="POOLED"><property name="driver" value="com.mysql.cj.jdbc.Driver"/><property name="url"value="jdbc:mysql://localhost:3306/cplb?useSSL=false&amp;useUnicode=true&amp;characterEncoding=utf-8"/><property name="username" value="root"/><property name="password" value="RZCxbs425130"/></dataSource></environment></environments><mappers><mapper class="com.hkd.dao.ProductMapper"/></mappers>
</configuration>

Spring

Maven依赖

<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.3.9</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.3.9</version>
</dependency>

beans.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd"><bean id="..." class="...">  <!-- collaborators and configuration for this bean go here --></bean><bean id="..." class="..."><!-- collaborators and configuration for this bean go here --></bean><!-- more bean definitions go here --></beans>

添加注解支持后的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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsd"><context:annotation-config/></beans>

两种命名（p命名、c命名）

p命名

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd"><bean name="classic" class="com.example.ExampleBean"><property name="email" value="someone@somewhere.com"/></bean><bean name="p-namespace" class="com.example.ExampleBean"p:email="someone@somewhere.com"/>
</beans>

c命名

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:c="http://www.springframework.org/schema/c"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd"><bean id="beanTwo" class="x.y.ThingTwo"/><bean id="beanThree" class="x.y.ThingThree"/><!-- traditional declaration with optional argument names --><bean id="beanOne" class="x.y.ThingOne"><constructor-arg name="thingTwo" ref="beanTwo"/><constructor-arg name="thingThree" ref="beanThree"/><constructor-arg name="email" value="something@somewhere.com"/></bean><!-- c-namespace declaration with argument names --><bean id="beanOne" class="x.y.ThingOne" c:thingTwo-ref="beanTwo"c:thingThree-ref="beanThree" c:email="something@somewhere.com"/></beans>

通用的代理类

public class ProxyInvocationHandler implements InvocationHandler {private Object target;public void setTarget(Object target) {this.target = target;}//生成代理类public Object getProxy(){return Proxy.newProxyInstance(this.getClass().getClassLoader(),target.getClass().getInterfaces(),this);}// proxy : 代理类// method : 代理类的调用处理程序的方法对象.public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {log(method.getName());Object result = method.invoke(target, args);return result;}public void log(String methodName){System.out.println("执行了"+methodName+"方法");}}

Aop的Maven依赖

<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.9.4</version>
</dependency>

SpringMVC

web.xml配置文件

<?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"><!--1.注册DispatcherServlet--><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--关联一个springmvc的配置文件:【servlet-name】-servlet.xml--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc-servlet.xml</param-value></init-param><!--启动级别-1--><load-on-startup>1</load-on-startup></servlet><!--/ 匹配所有的请求；（不包括.jsp）--><!--/* 匹配所有的请求；（包括.jsp）--><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping><!--解决乱码问题--><filter><filter-name>encoding</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>encoding</filter-name><url-pattern>/*</url-pattern></filter-mapping></web-app>

Springmvc-servlet.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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttps://www.springframework.org/schema/mvc/spring-mvc.xsd"><!--自动扫描包，让指定包下的注解生效，由IOC容器统一管理--><context:component-scan base-package="com.hkd.controller"/><mvc:default-servlet-handler/><mvc:annotation-driven/><!--视图解析器--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"><!--前缀--><property name="prefix" value="/WEB-INF/jsp/"/><!--后缀--><property name="suffix" value=".jsp"/></bean></beans>

解决乱码问题

SpringMVC自带

<filter><filter-name>encoding</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>encoding</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>

自定义过滤器

修改tomcat配置文件：设置编码

<Connector URIEncoding="utf-8" port="8080" protocol="HTTP/1.1"connectionTimeout="20000"redirectPort="8443" />

自定义过滤器

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;/**
* 解决get和post请求 全部乱码的过滤器
*/
public class GenericEncodingFilter implements Filter {@Overridepublic void destroy() {}@Overridepublic void doFilter(ServletRequest request, ServletResponse response, FilterChainchain) throws IOException, ServletException {//处理response的字符编码HttpServletResponse myResponse=(HttpServletResponse) response;myResponse.setContentType("text/html;charset=UTF-8");// 转型为与协议相关对象HttpServletRequest httpServletRequest = (HttpServletRequest) request;// 对request包装增强HttpServletRequest myrequest = new MyRequest(httpServletRequest);chain.doFilter(myrequest, response);}@Overridepublic void init(FilterConfig filterConfig) throws ServletException {}}//自定义request对象，HttpServletRequest的包装类
class MyRequest extends HttpServletRequestWrapper {private HttpServletRequest request;//是否编码的标记private boolean hasEncode;//定义一个可以传入HttpServletRequest对象的构造函数，以便对其进行装饰public MyRequest(HttpServletRequest request) {super(request);// super必须写this.request = request;}// 对需要增强方法 进行覆盖@Overridepublic Map getParameterMap() {// 先获得请求方式String method = request.getMethod();if (method.equalsIgnoreCase("post")) {// post请求try {// 处理post乱码request.setCharacterEncoding("utf-8");return request.getParameterMap();} catch (UnsupportedEncodingException e) {e.printStackTrace();}} else if (method.equalsIgnoreCase("get")) {// get请求Map<String, String[]> parameterMap = request.getParameterMap();if (!hasEncode) { // 确保get手动编码逻辑只运行一次for (String parameterName : parameterMap.keySet()) {String[] values = parameterMap.get(parameterName);if (values != null) {for (int i = 0; i < values.length; i++) {try {// 处理get乱码values[i] = new String(values[i].getBytes("ISO-8859-1"), "utf-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();}}}}hasEncode = true;}return parameterMap;}return super.getParameterMap();}//取一个值@Overridepublic String getParameter(String name) {Map<String, String[]> parameterMap = getParameterMap();String[] values = parameterMap.get(name);if (values == null) {return null;}return values[0]; // 取回参数的第一个值}//取所有值@Overridepublic String[] getParameterValues(String name) {Map<String, String[]> parameterMap = getParameterMap();String[] values = parameterMap.get(name);return values;}
}

IDEA使用

创建时的自动生成注释

Editor -> File and Code Templates -> Files -> Class

/***@Project_Name ${PROJECT_NAME}*@PackageName ${PACKAGE_NAME}*@ClassName ${Name}*@Description TODO*@Author 王一帆*@Company 软工1901*@Date ${DATE} ${TIME}*@Version 1.0**/

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Java常用环境配置（Maven、Mybatis、Spring、SpringMvc、Mybatis）

文章目录

Mysql

本机数据库连接配置文件

Maven

找不到资源问题解决

驱动

Mybatis

MybatisUtils

mapper

Mybatis-config.xml

Spring

Maven依赖

beans.xml

添加注解支持后的xml

两种命名（p命名、c命名）

p命名

c命名

通用的代理类

Aop的Maven依赖

SpringMVC

web.xml配置文件

Springmvc-servlet.xml

解决乱码问题

IDEA使用

创建时的自动生成注释

Java常用环境配置（Maven、Mybatis、Spring、SpringMvc、Mybatis）相关推荐

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