使用checkstyle插件检查代码质量

本示例介绍如何在Java项目中使用checkstyle插件对代码质量进行检查。checkstyle可以通过定义规则来检查代码中的编码和设计错误，如命名规则、代码风格等。

pom.xml

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-checkstyle-plugin</artifactId>
            <version>3.1.2</version>
            <executions>
                <execution>
                    <id>checkstyle</id>
                    <phase>verify</phase>
                    <goals>
                        <goal>check</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <configLocation>checkstyle.xml</configLocation>
            </configuration>
        </plugin>
    </plugins>
</build>

checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC
        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
        "https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="Checker">
    <module name="TreeWalker">
        <module name="JavadocType">
            <property name="scope" value="public"/>
            <property name="allowMissingParamTags" value="true"/>
        </module>
        <module name="JavadocMethod">
            <property name="scope" value="public"/>
            <property name="allowMissingParamTags" value="true"/>
        </module>
        <module name="JavadocVariable">
            <property name="scope" value="public"/>
            <property name="allowMissingParamTags" value="true"/>
        </module>
        <module name="NamingConventions">
            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
            <property name="packageFormat" value="^[a-z][a-z_]*([.][a-z][a-z_]*)*$"/>
            <property name="staticVariableNameFormat" value="^[A-Z][_A-Z0-9]*$"/>
            <property name="methodFormat" value="^[a-z][a-zA-Z0-9]*$"/>
            <property name="localVariableNameFormat" value="^[a-z][a-zA-Z0-9]*$"/>
            <property name="parameterNameFormat" value="^[a-z][a-zA-Z0-9]*$"/>
            <property name="classTypeParameterNameFormat" value="^[A-Z][a-zA-Z0-9]*$"/>
            <property name="interfaceTypeParameterNameFormat" value="^[A-Z][a-zA-Z0-9]*$"/>
        </module>
        <module name="BlockStatementBody">
            <message key="block.indentation.invalid" value="代码块缩进不正确"/>
            <property name="option" value="ONE_TRUE_BRACE_STYLE"/>
        </module>
        <module name="FileLength">
            <property name="max" value="1000"/>
        </module>
        <module name="RegexpSingleline">
            <property name="format" value="^.*(\s+\$\{).*$"/>
            <message key="SingleLineContains" value="代码中包含敏感信息，请删除"/>
        </module>
    </module>
</module>

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