idea 编译报错 未结束的字符串字面值，非法的类型开始

<build>    
        <plugins>    
            <plugin>    
                <artifactId>maven-compiler-plugin</artifactId>    
                <configuration>    
                    <source>1.6</source>    
                    <target>1.6</target>    
                    <encoding>UTF-8</encoding>    
                </configuration>    
            </plugin>    
        </plugins>    
    </build>