找到你的.m2文件 在里面添加一下信息

实例  将其更改成1.7

<profiles>

 

                  <profile>

                          <id>jdk-1.7</id>

                          <!-- 另外一种激活方式 -->

                          <activation>

                                   <activeByDefault>true</activeByDefault>

                                   <jdk>1.7</jdk>

                          </activation>

                          <properties>

                                   <maven.compiler.source>1.7</maven.compiler.source>

                                   <maven.compiler.target>1.7</maven.compiler.target>

                                   <maven.compiler.compilerVersion>1.7</maven.compiler.compilerVersion>

                          </properties>

 

                  </profile>

<profiles>

 

                  <profile>

                          <id>jdk-1.7</id>

                          <!-- 另外一种激活方式 -->

                          <activation>

                                   <activeByDefault>true</activeByDefault>

                                   <jdk>1.7</jdk>

                          </activation>

                          <properties>

                                   <maven.compiler.source>1.7</maven.compiler.source>

                                   <maven.compiler.target>1.7</maven.compiler.target>

                                   <maven.compiler.compilerVersion>1.7</maven.compiler.compilerVersion>

                          </properties>

                  </profile>