一直猜想是打包阶段的问题，找了好久找到这个：https://blog-gkishorapps.rhcloud.com/2014/05/removing-white-space-in-jsps-for-webapps-using-maven/ (翻墙才行)

直接上代码：

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <useCache>true</useCache>
            </configuration>
            <executions>
                <execution>
                    <id>prepare-war</id>
                    <phase>prepare-package</phase>
                    <goals>
                        <goal>exploded</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>com.google.code.maven-replacer-plugin</groupId>
            <artifactId>replacer</artifactId>
            <version>1.5.2</version>
            <executions>
                <execution>
                    <phase>prepare-package</phase>
                    <goals>
                        <goal>replace</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <basedir>${project.build.directory}</basedir>
                <filesToInclude>${project.artifactId}/WEB-INF/jsp/**/*.jsp</filesToInclude>
                <token>>\s*<</token>
                <value>><</value>
                <regexFlags>
                    <regexFlag>MULTILINE</regexFlag>
                </regexFlags>
            </configuration>
        </plugin>
    </plugins>
</build>

主要是让war-plugin拷贝之后再替换

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