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SSM框架(从0到发布)

作者:互联网

SSM(spring-springMVC-mybatis)

开发工具

idea2020.1.3

jdk1.8

centOS 7.x

navicat

xshell

xftp

以下部分均不包含软件安装和环境变量的配置,如果安装有问题请私信,近期会出一篇针对安装的问题

以下部分暂不包含部署问题,部署部分包含在我的另一篇博客 部署的文章

一、项目创建

 

1、新建项目,选中spring内的springMVC

 

2、输入项目名,我这里是testJava

2.1、可能会遇到代理的问题

2.1.1、可重试try again

2.1.2、点击Set up HTTP proxy settings。

点击后,在第二项添加华为Maven仓库https://mirrors.huaweicloud.com/repository/maven/

点击Try again

参照 https://blog.csdn.net/Y920036515/article/details/105982550

 

我是通过2.1.1的办法解决了

 

3、由于我们不通过tomcat启动服务,而是通过springApplication启动,所以不需要配置tomcat。

下载对应的包之后,右键项目名,Add Framwork Support

勾选maven,点击确定

 

4、修改groupId,build项目

以上就配置完一个带有SpringMVC+Maven 的项目了

 

二、配置mybatis以及数据库

 

1、新建mybatis配置文件applicationContext-myibatis.xml

 

2、添加mybatis配置的路径

 

3、通过xshell进入服务器,新建数据库

mysql -uroot -p 

输入密码

CREATE DATABASE 数据库的名字;(这个分号一定要加,不加不执行)

创建完成后,使用navicat连接会显示这个数据库

 

4、新建表,并添加字段

这里的ID,我是自动递增,然后不能为空,其他的大家自由发挥

输入表名就可以了,我这里是t_user。

 

5、配置mybatis

resource下新增 mybatis.properties文件

database.driver=com.mysql.jdbc.Driver 
database.url=jdbc:mysql://xx.xx.xx.xx:端口号/XXXX?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
database.username=数据库名字
database.password=数据库密码

database.maxActive=100
database.maxWait=30000
database.maxIdle=5
sqlSessionFactory.configLocation=classpath:/mybatis/mybatis-config.xml

 

6、applicationContext.xml新增内容

    <bean id="propertyConfigurer"         class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath*:刚刚创建的文件名字.properties</value>  <!--指向数据库的配置文件-->
            </list>
        </property>
    </bean>

7、新建sqlMapConfig.xml文件,并写入

 


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <!-- 这个配置使全局的映射器启用或禁用缓存 -->
        <setting name="cacheEnabled" value="true" />
        <!-- 允许 JDBC 支持生成的键。需要适合[修改为:适当]的驱动。如果设置为true,则这个设置强制生成的键被使用,尽管一些驱动拒绝兼容但仍然有效(比如 Derby) -->
        <setting name="useGeneratedKeys" value="true" />
        <!-- 配置默认的执行器。SIMPLE 执行器没有什么特别之处。REUSE 执行器重用预处理语句。BATCH 执行器重用语句和批量更新  -->
        <setting name="defaultExecutorType" value="REUSE" />
        <!-- 全局启用或禁用延迟加载。当禁用时,所有关联对象都会即时加载 -->
        <setting name="lazyLoadingEnabled" value="true"/>
        <!-- 设置超时时间,它决定驱动等待一个数据库响应的时间  -->
        <setting name="defaultStatementTimeout" value="25000"/>


        <setting name="callSettersOnNulls" value="true"/>

        <!--log4-->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
        <setting name="lazyLoadingEnabled" value="true"></setting>
        <setting name="aggressiveLazyLoading" value="false"></setting>

        

    </settings>



</configuration>

 

7、新建包名,配置pom.xml文件,添加mybatis依赖

<?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>testJava</groupId>
    <artifactId>testJava</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!--mybatis-spring-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.2</version>
        </dependency>


        <!-- mybatis核心包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.8</version>
        </dependency>


        <!--BasicDataSource-->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>

        <dependency>
            <groupId>commons-pool</groupId>
            <artifactId>commons-pool</artifactId>
            <version>1.6</version>
        </dependency>
    <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>
    </dependencies>
</project>

 

9、配置application'Context-mybatis.xml并写入

<?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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">


    <context:annotation-config/>
    <!--
        当有多个全局配置文件的时候,有可能会出现重复扫描导致出错
        这里的 <context:component-scan base-package="com.tronrun.exhibition">
        指定了要扫描的包名但是下面的
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        指定排除扫描所有加了@Controller注解的类 (排除 排除 排除)
        -->
    <context:component-scan base-package="com.javatest.beans">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>


    <!--配置mybatis连接数据库的参数-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="${database.driver}"/>
        <property name="url" value="${database.url}"/>
        <property name="username" value="${database.username}"/>
        <property name="password" value="${database.password}"/>
        <!--连接池的最大数据库连接数 -->
        <property name="maxActive" value="${database.maxActive}"/>
        <!--最大等待连接中的数量 -->
        <property name="maxIdle" value="${database.maxIdle}"/>
        <!--最大等待毫秒数 -->
        <property name="maxWait" value="${database.maxWait}"/>
        <property name="defaultAutoCommit" value="true"/>
    </bean>


    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--引用数据库bean对象-->
        <property name="dataSource" ref="dataSource"/>
        <!--引用MyBatis的配置文件的文件路径
        注意路径是否对,否者运行出错很难发现问题,切记-->
        <property name="configLocation" value="WEB-INF/sqlMapConfig.xml"/>
        <!--Mapper所在的文件路径(这里的*.xml表示所有.xml结尾的文件)
        注意路径是否对,否者运行出错很难发现问题,切记-->
        <!--Mapper文件的路径
        注意路径是否对,否者运行出错很难发现问题,切记-->
        <property name="mapperLocations" value="classpath*:com/javatest/mapper/*.xml"/>
    </bean>


    <!--Mapper扫描配置-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--basePackage扫描的路径
          注意路径是否对,否者运行出错很难发现问题,切记-->
        <property name="basePackage" value="com.javatest.mapper"></property>
        <!--传入sqlSessionFactoryBeanName对象,指向的是上面配置的sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        <!--对注入标签@Repository生效-->
        <property name="annotationClass" value="org.springframework.stereotype.Repository"></property>
    </bean>
</beans>

配置完成之后,这里会报错,暂时不管,等添加xml文件之后会消失

 

10、配置dispatch-servlet.xml并写入

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 定义扫描装载控制器的包路径,排除用了@Service标签的类 -->
    <context:component-scan base-package="com.javatest">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service"/>
    </context:component-scan>


    <!-- 定义视图解析器,找到Web工程/WEB-INF/JSP文件夹,且文件结尾为jsp的文件作为映射 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="jsonConverter"></ref>
            </list>
        </property>
    </bean>

    <!--配置MappingJackson2HttpMessageConverter的编码方式防止中文乱码-->
    <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>application/json;charset=UTF-8</value>
            </list>
        </property>
    </bean>

</beans>

 

三、配置实体类等文件

 

1、添加UserBean实体类

package com.javatest.beans;

public class UserBean {
    private int id;
    private String userName;
    private int age;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

 

2、添加mapper.xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.Lipt0n.test.Mapper.UserInfoMapper">

    <insert id="addUser" parameterType="String">
        insert into t_user (
        id,username,age)
        values (#{id},#{username},#{age})
    </insert>


    <delete id="deleteUser" parameterType="String">
       delete from t_uer where id=#{id}
    </delete>

    <select id="getUser" parameterMap="com.javatest.beans.UserBean">
        select * from t_user where id=#{id}
    </select>

    <update id="updateUser" parameterMap="String">
        update t_user set username=#{username},age=#{age} where id=#{id}
    </update>

</mapper>

 

3、添加UserMapper.class

package com.javatest.mapper;

import com.javatest.beans.UserBean;
import org.springframework.stereotype.Repository;

@Repository
public interface UserMapper {
    void addUser(int id,String username,int age);
    void deleteUser(int id);
    void updateUser(int id,String username,int age);
    UserBean getUser(int id);
}

 

4、添加UserService.class

package com.javatest.service;

import com.javatest.beans.UserBean;

public interface UserService {
    void addUser(UserBean bean);
    void deleteUser(int id);
    void updateUser(UserBean bean);
    UserBean getUser(int id);
}

 

5、添加UserImpl.class

package com.javatest.impl;

import com.javatest.beans.UserBean;
import com.javatest.mapper.UserMapper;
import com.javatest.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

@Service
public class UserImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Transactional(isolation = Isolation.READ_COMMITTED, propagation = Propagation.REQUIRED)
    public void addUser(UserBean bean) {
        userMapper.addUser(bean.getId(),bean.getUserName(),bean.getAge());
    }

    public void deleteUser(int id) {
        userMapper.deleteUser(id);
    }

    public void updateUser(UserBean bean) {
        userMapper.updateUser(bean.getId(),bean.getUserName(),bean.getAge());
    }

    public UserBean getUser(int id) {
        return userMapper.getUser(id);
    }
}

 

6、新建一个普通类BaseResultBean.class,用于返回基本类型等

package com.javatest;

public class BaseResultBean {
    private int code;
    private String msg;
    private Object result;


    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getResult() {
        return result;
    }

    public void setResult(Object result) {
        this.result = result;
    }
}

 

7、新建ctroller包名,并新建UserControll.class

package com.javatest.controller;

import com.javatest.BaseResultBean;
import com.javatest.beans.UserBean;
import com.javatest.service.UserService;
import net.sf.json.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserControll {
    @Autowired
    private UserService userService =null;

    @RequestMapping(value = "/addUser",method = RequestMethod.POST)
    //新增用户信息
    public BaseResultBean insertUser(UserBean userBean) {
        BaseResultBean resultBean = new BaseResultBean();
        int code = userService.addUser(userBean);
        resultBean.setCode(-1);
        resultBean.setMsg("新增用户失败");
        if (code==1){
            resultBean.setCode(0);
            resultBean.setMsg("新增用户成功");

        }
        return resultBean;
    }

    @RequestMapping(value = "/deleteUser",method = RequestMethod.GET)
    //删除用户信息
    public BaseResultBean deleteUser(UserBean userBean) {
        BaseResultBean resultBean = new BaseResultBean();
        int code = userService.deleteUser(userBean.getId());
        resultBean.setCode(-1);
        resultBean.setMsg("删除用户失败");
        if (code==1){
            resultBean.setCode(0);
            resultBean.setMsg("删除用户成功");

        }
        return resultBean;
    }
    @RequestMapping(value = "/updateUser",method = RequestMethod.GET)
    //修改用户信息
    public BaseResultBean updateUser(UserBean userBean) {
        BaseResultBean resultBean = new BaseResultBean();
        int code = userService.updateUser(userBean);
        resultBean.setCode(-1);
        resultBean.setMsg("更新用户失败");
        if (code==1){
            resultBean.setCode(0);
            resultBean.setMsg("更新用户成功");

        }
        return resultBean;
    }
    @RequestMapping(value = "/getUser",method = RequestMethod.GET)
    //查询用户信息
    public BaseResultBean getUser(UserBean userBean) {
        BaseResultBean resultBean = new BaseResultBean();
        UserBean bean = userService.getUser(userBean.getId());
        resultBean.setCode(-1);
        resultBean.setMsg("查询用户失败");
        if (bean !=null ){
            resultBean.setCode(0);
            JSONObject jsonObject = JSONObject.fromObject(bean);
            resultBean.setMsg(jsonObject.toString());
        }
        return resultBean;
    }
}

 

8、新建tool包名,并新建JsonTools.class

package com.javatest.tool;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;

public class JsonTools extends ObjectMapper {

    private static final long serialVersionUID = 1L;

    public JsonTools() {
        super();
        // 空值处理为空串
        this.getSerializerProvider().setNullValueSerializer(new JsonSerializer<Object>() {
            @Override
            public void serialize(Object value, JsonGenerator jg, SerializerProvider sp) throws IOException {
                jg.writeString("");
            }
        });


    }
}

 

9、在dispatch-servlet.xml文件中新增内容,适配baseResult

    <!-- 使用注解驱动 -->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="objectMapper">
                    <!--封装好的适配器,把null的数据转成空字符-->
                    <bean class="com.javatest.tool.JsonTools">
                        <!-- 处理responseBody 里面日期类型 -->
                        <property name="dateFormat">
                            <bean class="java.text.SimpleDateFormat">
                                <constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" />
                            </bean>
                        </property>
                    </bean>

                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

 

四、准备打包运行,解决出现的问题

 

 

 

 

 

参考内容链接

https://www.jianshu.com/p/78a1cb4cefff?from=singlemessage

标签:框架,int,id,SSM,发布,resultBean,import,com,public
来源: https://blog.csdn.net/WalterZhoukick/article/details/112762862