FastJson学习笔记

1.测试实体类

/** *  * @Description: 测试 * @date 2017年7月12日 下午6:04:09 * @version V1.0 */public class Person {    /**     * 姓名     */    private String name;    /**     * 年龄     */    private Integer age;    /**     * 地址     */    private String address;    /**     * 电话     */    private String tellphone;    public Person(){}    /**     * @param name     * @param age     */    public Person(String name, Integer age) {        super();        this.name = name;        this.age = age;    }    public Person(String name, Integer age, String address, String tellphone) {        this.name = name;        this.age = age;        this.address = address;        this.tellphone = tellphone;    }    /**     * @return the name     */    public String getName() {        return name;    }    /**     * @param name     *            the name to set     */    public void setName(String name) {        this.name = name;    }    /**     * @return the age     */    public Integer getAge() {        return age;    }    /**     * @param age     *            the age to set     */    public void setAge(Integer age) {        this.age = age;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }    public String getTellphone() {        return tellphone;    }    public void setTellphone(String tellphone) {        this.tellphone = tellphone;    }    @Override    public String toString() {        return "Person [name=" + name + ", age=" + age + "]";    }}

2.FastJson常用API

/** * com.alibaba.fastjson.JSON; * This is the main class for using Fastjson * You usually call these two methods toJSONString(Object) and parseObject(String, Class). */public class FastJsonTest {    /**     * deserializes json into  model     */    public void jsonToModel(){        StringBuilder jsonBuilder = new StringBuilder(128);        jsonBuilder.append("{\"name\":\"xiaoming\",\"age\":\"25\"}");        Person person = JSON.parseObject(jsonBuilder.toString(),Person.class);        System.out.println(person);        // Person [name=xiaoming, age=25]    }    /**     *  the object that your are serializing/deserializing is a ParameterizedType     *  then you must use the  parseObject(String, Type, Feature[]) method     */    public void jsonToList(){        StringBuilder jsonBuilder = new StringBuilder(128);        jsonBuilder.append("[");        jsonBuilder.append("{\"name\":\"Tom\",\"age\":\"23\"},");        jsonBuilder.append("{\"name\":\"Cat\",\"age\":\"21\"}");        jsonBuilder.append("]");        Type type = new TypeReference<List<Person>>() {}.getType();        // This method deserializes the specified Json into an object of the specified type.        // This method is useful if the specified object is a generic type(泛型)        // For non-generic objects, use parseObject(String, Class, Feature[]) instead        List<Person> list = JSON.parseObject(jsonBuilder.toString(), type);        for(Person p : list){            System.out.println(p);        }      //  Person [name=Tom, age=23]       // Person [name=Cat, age=21]    }    public void jsonToMap(){        StringBuilder jsonBuilder = new StringBuilder(128);        jsonBuilder.append("{\"name\":\"xiaoming\",\"age\":\"25\"}");        Type type = new TypeReference<Map<String, Object>>() {}.getType();        Map  map = JSON.parseObject(jsonBuilder.toString(), type);        System.out.println(map);        //{name=xiaoming, age=25}    }    /**     * serializes model to Json     */    public void  modelToJson(){        String json = JSON.toJSONString(new Person("tocmat",22));        System.out.println(json);        // {"age":22,"name":"tocmat"}         //格式化        System.out.println(JSON.toJSONString(new Person("测试",25),true));        /**         * {         "age":25,         "name":"测试"         }         */    }    /**     * 集合转json字符串     */    public void listToJson(){        Person one = new Person("Tom",21);        Person two = new Person("Cat",25);        List<Person> list = new ArrayList<>();        list.add(one);        list.add(two);        String json = JSON.toJSONString(list,true);        System.out.println(json);        /**          [            {         "age":21,         "name":"Tom"         },         {         "age":25,         "name":"Cat"         }         ]         */    }    /**     * 自定义反序列化     */   public void customerJsonToObject(){     //  Feature.AllowSingleQuotes  允许单引号  默认已使用       //  Feature.AllowUnQuotedFieldNames  允许没有引号的key 默认已使用       // ....       StringBuilder jsonBuilder = new StringBuilder(128);       jsonBuilder.append("{\"name\":\'xiaoming\',age:\"25\"}");       Person person = JSON.parseObject(jsonBuilder.toString(), Person.class, Feature.AllowSingleQuotes);       System.out.println(person);       //Person [name=xiaoming, age=25]   }    /**     * 自定义序列化     */   public void customerObjectToJson(){       // SerializerFeature.QuoteFieldNames 用引号包裹key 默认已使用       // SerializerFeature.SortField 排序输出字段  默认已使用      //  SerializerFeature.PrettyFormat  格式化      //  SerializerFeature.UseSingleQuotes  key和字符串值  使用单引号       // .....       String json = JSON.toJSONString(new Person("tomcat",22), SerializerFeature.PrettyFormat,SerializerFeature.UseSingleQuotes);       System.out.println(json);       /**        {        'age':22,        'name':'tomcat'        }        */       //忽略的字段和包含字段       SimplePropertyPreFilter filter = new SimplePropertyPreFilter();       filter.getExcludes().add("name"); //忽略name字段       filter.getExcludes().add("age"); // 忽略age字段       Person person = new Person("张三",25,"某某地址","1534587787");       String personjson = JSON.toJSONString(person, filter);       System.out.println(personjson);       // {"address":"某某地址","tellphone":"1534587787"}       filter = new SimplePropertyPreFilter();       filter.getIncludes().add("address"); //包含address字段       filter.getIncludes().add("age");  //包含age字段       System.out.println(JSON.toJSONString(person,filter));       // {"address":"某某地址","age":25}   }    public static void main(String[] args){        FastJsonTest  test = new FastJsonTest();        test.customerObjectToJson();    }}