net.sf.json pom依赖文件

<!-- json jar包 -->
    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>
    
    <dependency>
        <groupId>commons-beanutils</groupId>
        <artifactId>commons-beanutils</artifactId>
        <version>1.9.2</version>
    </dependency>
    
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.6</version>
    </dependency>
    
    <dependency>
        <groupId>net.sf.ezmorph</groupId>
        <artifactId>ezmorph</artifactId>
        <version>1.0.6</version>
    </dependency>

//排除roles属性不做序列化
        JsonConfig jsonConfig = new JsonConfig();  
        jsonConfig.setExcludes(new String[]{ "roles" });
        
        //注意，如果json对象包含了为null的值，转换将会报错
        JSONObject.fromObject(json, jsonConfig);