springboot相关配置

Posted 2021-03-20 数小钱钱的种花兔

博客搬家：springboot相关配置

配置mybatis

• application.properties中配置

mybatis.mapper-location=classpath:com/leida/mapper/*.xml

#配置数据库连接信息
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3307/mls?useUnicode=true&characterEncoding=utf8&useSSL=false

• pom.xml中添加以下配置

<!-- 继承springboot的父级项目依赖 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <!-- 属性配置 -->
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- 开发web项目的起步依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--加载mybatis整合springboot-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!--mysql的jdbc驱动包-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

    </dependencies>

• 编写generatorConfig.xml，自动生成代码的根文件

<?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>
    <!--导入属性配置 -->
    <properties resource="application.properties"></properties>

    <!--指定特定数据库的jdbc驱动jar包的位置 -->
    <classPathEntry location="C:Usersleida.m2
epositorymysqlmysql-connector-java8.0.18mysql-connector-java-8.0.18.jar"/>

    <context id="default" targetRuntime="MyBatis3">


        <!-- optional，旨在创建class时，对注释进行控制 -->
        <commentGenerator>
            <property name="suppressDate" value="true" />
        </commentGenerator>


        <!--jdbc的数据库连接 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1:3307/mls" userId="root" password="123456">
        </jdbcConnection>



        <!-- 非必需，类型处理器，在数据库类型和java类型之间的转换控制-->
        <javaTypeResolver >
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- Model模型生成器,用来生成含有主键key的类，记录类 以及查询Example类
            targetPackage     指定生成的model生成所在的包名
            targetProject     指定在该项目下所在的路径
        -->
        <javaModelGenerator targetPackage="com.leida.model" targetProject="src/main/java">
            <!-- 是否对model添加 构造函数 -->
            <property name="constructorBased" value="true"/>

            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>

            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <property name="immutable" value="true"/>

            <!-- 给Model添加一个父类 -->
<!--            <property name="rootClass" value="com.foo.louis.Hello"/>-->

            <!-- 是否对类CHAR类型的列的数据进行trim操作 -->
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!--Mapper映射文件生成所在的目录 为每一个数据库的表生成对应的SqlMap文件 -->
        <sqlMapGenerator targetPackage="com.leida.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>


        <!-- 客户端代码，生成易于使用的针对Model对象和XML配置文件 的代码
                type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象
                type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象
                type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口
        -->
        <javaClientGenerator targetPackage="com.leida.mapper" targetProject="src/main/java" type="MIXEDMAPPER">
            <property name="enableSubPackages" value=""/>
            <!--
                    定义Maper.java 源代码中的ByExample() 方法的可视性，可选的值有：
                    public;
                    private;
                    protected;
                    default
                    注意：如果 targetRuntime="MyBatis3",此参数被忽略
             -->
            <property name="exampleMethodVisibility" value=""/>
            <!--
                                           方法名计数器
              Important note: this property is ignored if the target runtime is MyBatis3.
             -->
            <property name="methodNameCalculator" value=""/>

            <!--
                                                为生成的接口添加父接口
             -->
            <property name="rootInterface" value=""/>

        </javaClientGenerator>


        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->
        <table tableName="test"
               domainObjectName="Test"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>

    </context>
</generatorConfiguration>  

• 在pom.xml中添加自动生成代码的插件，在build中添加如下代码

<plugins>
    <!--mybatis代码自动生成插件-->
    <plugin>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-maven-plugin</artifactId>
        <version>1.3.6</version>
        <configuration>
            <!--配置文件位置-->
            <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
            <verbose>true</verbose>
            <overwrite>true</overwrite>
        </configuration>
    </plugin>
</plugins>

• 在maven中generate生成代码，会生成model的类和接口和mapper
• 添加controller包，添加controller

package com.leida.controller;

import com.leida.service.TestDataService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

    @Autowired
    private TestDataService testDataService;

    @GetMapping("/testData")
    public Object testData () {
        return testDataService.getAllTestData();
    }
}

• 添加service包，里面添加接口和impl包，impl包中添加实现接口的类

#接口
package com.leida.service;

import com.leida.model.Test;

import java.util.List;

public interface TestDataService {

    public List<Test> getAllTestData();
}

实现上面接口的类

package com.leida.service.impl;

import com.leida.mapper.TestMapper;
import com.leida.model.Test;
import com.leida.service.TestDataService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class TestDataServiceImpl implements TestDataService {

    @Autowired
    private TestMapper testMapper;
    @Override
    public List<Test> getAllTestData() {
        return testMapper.getAllData();
    }
}

• Mapper中添加底层方法

List<Test> getAllData();

• 编写TestMapper.xml，与Mapper.class中的方法名相对应

<!--  查询所有数据-->
  <select id="getAllData"  resultMap="BaseResultMap">
    <!--
      WARNING - @mbg.generated
      This element is automatically generated by MyBatis Generator, do not modify.
    -->
    select
     *
     from test
  </select>
</mapper>

• 测试还需要在pom.xml中，plugins下面添加如下配置，主要是第一个，否则xml无法编译进文件夹

<resources>
    <resource>
        <directory>src/main/resources</directory>
        <includes>
            <include>**/**</include>
        </includes>
        <!-- 开启过滤，用指定的参数替换directory下的文件中的参数 -->
        <filtering>false</filtering>
    </resource>

    <resource>
        <directory>src/main/webapp</directory>
        <targetPath>META-INF/resources</targetPath>
        <includes>
            <include>**/**</include>
        </includes>
    </resource>

    <resource>
        <directory>src/main/java</directory>
        <excludes>
            <exclude>
                **/*.java
            </exclude>
        </excludes>
    </resource>
</resources>

集成jsp

• pom.xml需要额外这些依赖，在dependencies中

<!-- 测试的起步依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.junit.vintage</groupId>
            <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
    </exclusions>
</dependency>

<!-- 使用jsp引擎，springboot内置的tomcat没有此依赖 -->
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<!-- 添加servlet依赖模块 -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <scope>provided</scope>
</dependency>
<!-- 添加jstl标签库依赖模块 -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>
<!--添加tomcat依赖模块.-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <scope>provided</scope>
</dependency>

• resources中的application.properties

server.port=8080
#上下文
server.servlet.context-path=/mls

#jsp访问路径
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

• main下面建webapp/WEB-INF，下面建jsp文件
• controller中建jspcontroller

package com.leida.springboot.mls.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class JSPController {
    @GetMapping("/")
    public String login(){
        return "index";
    }
}