写在前面
IntelliJ IDEA集成了很多我们开发中常用的工具，Linux连接，Git,数据库操作…
这里我们介绍，IDEA集成数据库操作，并对SQL可格式化…
通过命令,但是在合适的执行文件中…
Ctrl Alt L
1.1、建立连接，数据库服务器地址，账号，密码等…
1.2、基本操作，很多，增删改查，控制台SQl编写等等
SQL执行控制台，这里是格式化之后的，我们平时手写的SQL都是没有格式化的，注意这里提供了输入框，操作占位符的参数也很方便…
那么这里的格式化的SQL是怎么实现的呢？？
这里的哈，IDEA的快捷键 Ctrl + Alt + L，就可以格式化SQL
补充：解决idea的src目录下不能编译SQL语句的xml配置文件的问题
一：正常配置下的情况
1.编译的目录下不会编译映射配置文件.xml，但是resources目录中的文件都被编译出来。
2.pom.xml文件的配置
<?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.sly</groupId> <artifactId>hrm01</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>hrm01 Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!-- 导入jar包 1.spring的jar包：11个 com.springsource.org.aopalliance-1.0.0.jar com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar spring-aop-5.0.1.RELEASE.jar spring-aspects-5.0.1.RELEASE.jar spring-beans-5.0.1.RELEASE.jar spring-context-5.0.1.RELEASE.jar spring-core-5.0.1.RELEASE.jar spring-expression-5.0.1.RELEASE.jar spring-jcl-5.0.1.RELEASE.jar spring-jdbc-5.0.1.RELEASE.jar spring-tx-5.0.1.RELEASE.jar --> <!-- https://mvnrepository.com/artifact/org.aopalliance/com.springsource.org.aopalliance --> <dependency> <groupId>org.aopalliance</groupId> <artifactId>com.springsource.org.aopalliance</artifactId> <version>1.0.0</version> </dependency> <!-- https://mvnrepository.com/artifact/org.aspectj/com.springsource.org.aspectj.weaver --> <dependency> <groupId>org.aspectj</groupId> <artifactId>com.springsource.org.aspectj.weaver</artifactId> <version>1.6.4.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>5.0.10.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>5.1.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jcl</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>5.0.1.RELEASE</version> </dependency> <!--导入jar包 2.springmvc的jar包：2个 spring-web-5.0.1.RELEASE.jar spring-webmvc-5.0.1.RELEASE.jar 3.MyBatis的jar包：13个 mybatis-3.4.2.jar 依赖jar包12个 4.MyBatis和Spring整合的jar包：1个 mybatis-spring-1.3.1.jar --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!--导入jar包5.数据库驱动jar包：1个mysql-connector-java-5.1.7-bin.jar6.数据源druid的jar包：1个druid-1.1.5.jar7.JSTL的jar包：2个jstl-1.1.2 .jarstandard-1.1.2.jar--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.48</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.5</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <!--导入Tomcat的jar包--> <!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-servlet-api --> <dependency> <groupId>org.apache.tomcat</groupId> <artifactId>tomcat-servlet-api</artifactId> <version>9.0.21</version> </dependency> </dependencies> <build> <finalName>hrm01</finalName> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build></project>
3.控制台无报错且网页报错404 找不到，或者500如下错误。
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘userHandler’: Unsatisfied dependency expressed through field ‘userService’; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘userServiceImpl’: Unsatisfied dependency expressed through field ‘userDao’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘IUserDao’ defined in file [D:\Tomcat\apache-tomcat-9.0.27\webapps\hrm01_war\WEB-INF\classes\com\hrm\user\dao\IUserDao.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: org.apache.ibatis.builder.BuilderException: Wrong namespace. Expected ‘com.hrm.user.dao.IUserDao’ but found ‘com.hrm.user.dao.UserDao’.
二、解决方案
1.在pom文件中的build标签下配置该属性即可解决这个问题，但是要注意src前面不要加 / 。
一定不要写为：（/src/main/java）。
这样在编译目录下xml文件也被编译。
2.加入该配置后编译目录下有了映射配置文件，见上图IUserDao.xml。
控制台可以正常显示数据。
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。
不能接受失败，也意味太想去成功了，从心理学上解释，
