Java basic tutorial-use IDEA to create a Maven-style SSM project

Note: IDEA must use IDEA 2017. The 2018 version has a bug and cannot deploy this project.
If you must use idea 2018, you need to make the following changes:
File->Settings->Build,Execution,Deployment->Build Tools->Maven->Importing Cancel "Store generated project files externally"
so that it can be used

Step 2: Based on the previous knowledge points

This knowledge point is carried out on the basis of PageHelper , so first go to PageHelper to download the executable project and unzip it.

Note: Do not download to the runnable project of the current knowledge point.

Step 3: Create a new project

Click Create New Project to create a new project

Step 4: Select the maven webapp format

1. Select Maven on the left
2. Check Create from archetype
3. Select org.apache.maven.archetypes:maven-archetype-webapp
4. Next

Step 5: project parameters

GroupId: com.how2java
ArtifactId: ssm

Step 6: Confirm Maven path

This step will see the parameters in the Maven configuration , no need to change

Step 7: Confirm the project name

No need to change, just click Finish

Step 8: Maven import

Every time a new Maven project is created or pom.xml is changed, there will be this prompt. This time, click Enable Auto-Import to automatically import, saving trouble.

Step 9: Create a new java source code directory

The maven web project does not have a java source code directory by default, so you need to create it manually and set it as the source code directory.
Right-click the main directory -> New->Directory-> enter java-> right-click java->Mark Directory as-> Sources Root
This creates a directory for storing java source files

Step 10: download the project and unzip

This knowledge point is carried out on the basis of PageHelper , so first go to PageHelper to download the executable project and unzip it.

As shown in the figure, what you see is the directory structure of the Eclipse dynamic web project.

Note: Do not download to the runnable project of the current knowledge point.

import java.io.IOException;

import java.util.Date;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class HelloServlet extends HttpServlet{

public void doGet(HttpServletRequest request, HttpServletResponse response){

try {

response.getWriter().println("<h1>Hello Servlet!</h1>");

response.getWriter().println(new Date().toLocaleString());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

Step 11: modify pom.xml

Then copy and paste pom.xml as the following code

<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.how2java</groupId>

<artifactId>ssm</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>war</packaging>

<properties>

<spring.version>4.1.3.RELEASE</spring.version>

<pagehelper.version>5.1.2-beta</pagehelper.version>

<mysql.version>5.1.6</mysql.version>

<mybatis.spring.version>1.2.3</mybatis.spring.version>

<mybatis.version>3.1.1</mybatis.version>

<junit.version>4.12</junit.version>

<jstl.version>1.2</jstl.version>

<jsqlparser.version>1.0</jsqlparser.version>

<jackson.version>1.2.7</jackson.version>

<servlet-api.version>3.1.0</servlet-api.version>

<druid.version>1.0.18</druid.version>

<log4j.version>1.2.16</log4j.version>

<commons-logging.version>1.2</commons-logging.version>

<commons-fileupload.version>1.2.1</commons-fileupload.version>

<commons-io.version>1.3.2</commons-io.version>

<commons-lang.version>2.6</commons-lang.version>

<aopalliance.version>1.0</aopalliance.version>

<mybatis-generator.version>1.3.5</mybatis-generator.version>

</properties>

<dependencies>

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>${junit.version}</version>

</dependency>

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis</artifactId>

<version>${mybatis.version}</version>

</dependency>

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>

<version>${mybatis.spring.version}</version>

</dependency>

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<version>${mysql.version}</version>

</dependency>

<dependency>

<groupId>com.alibaba</groupId>

<artifactId>druid</artifactId>

<version>${druid.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>