将实体类 转换为Json 输出 重写 toString

一、导入jar包

 <!-- https://mvnrepository.com/artifact/net.sf.ezmorph/ezmorph -->
        <dependency>
            <groupId>net.sf.ezmorph</groupId>
            <artifactId>ezmorph</artifactId>
            <version>1.0.6</version>
        </dependency>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <!-- 必须加jdk的版本号 -->
            <classifier>jdk15</classifier>
        </dependency> <!-- https://mvnrepository.com/arti