Json系列之四 揭开JsonConfig的神秘面纱 java to json

标签：

//揭开JsonConfig的神秘面纱,for bean to json
		 JsonConfig jsonConfig = new JsonConfig();
		 //忽略掉bean中含后某个注解的field，不转换成json，可以多次增加不同注解
		 //jsonConfig.addIgnoreFieldAnnotation(Person.class);//一定是注解的类，我这里没有例子，大家可以自己做
		 //同上
		 //jsonConfig.addIgnoreFieldAnnotation("person");
		 //把某种类型的class，转换成自定义的结果
		 jsonConfig.registerDefaultValueProcessor(Address.class, new DefaultValueProcessor() {
			
			@Override
			public Object getDefaultValue(Class type) {
				
				return null;
			}
		 });
		 //返回成自己设定的jsonObject
//		 jsonConfig.registerJsonBeanProcessor(Person.class, new JsonBeanProcessor() {
//			
//			@Override
//			public JSONObject processBean(Object bean, JsonConfig jsonConfig) {
//				
//				return null;
//			}
//		});
		//jsonConfig.registerPropertyNameProcessor(target, propertyNameProcessor);
		//被registerJsonPropertyNameProcessor取代
		//在到json层的时候的转换，比上面javapropertyName靠后执行
		 jsonConfig.registerJsonPropertyNameProcessor(Person.class, new PropertyNameProcessor() {
			
			@Override
			public String processPropertyName(Class beanClass, String name) {
				if(name.equals("name")){
					return "nameJson";
				}
				return name;
			}
		 });
		 //在json层转换的
		 jsonConfig.registerJsonValueProcessor(String.class, new JsonValueProcessor() {
			
			@Override
			public Object processObjectValue(String key, Object value,
					JsonConfig jsonConfig) {
				if(key.equals("emptyStr")){
					
					return "asdfa";
				}
				return value;
			}
			
			@Override
			public Object processArrayValue(Object value, JsonConfig jsonConfig) {
				// TODO Auto-generated method stub
				return null;
			}
		 });
		 jsonConfig.registerJsonValueProcessor("nullStr", new JsonValueProcessor() {
			
			@Override
			public Object processObjectValue(String key, Object value,
					JsonConfig jsonConfig) {
				
				return "nullStr2";
			}
			
			@Override
			public Object processArrayValue(Object value, JsonConfig jsonConfig) {
				return null;
			}
		});
		//jsonConfig.registerJsonValueProcessor(beanClass, propertyType, jsonValueProcessor);//更加细化
		//jsonConfig.registerJsonValueProcessor(beanClass, key, jsonValueProcessor);//更加细化
		 
		//剔除哪个属性
		jsonConfig.registerPropertyExclusion(Person.class, "sameTest");
		//剔除哪些属性
		//jsonConfig.registerPropertyExclusions(target, properties);
		//是否允许空
		jsonConfig.setAllowNonStringKeys(true);
		//内部如果有嵌套引用时候，如何处理 DEFAULT_CYCLE_DETECTION_STRATEGY = CycleDetectionStrategy.STRICT;
		//jsonConfig.setCycleDetectionStrategy(cycleDetectionStrategy);
		
		//可以实现吧A class 转换成B Class
//		jsonConfig.setDefaultValueProcessorMatcher(new DefaultValueProcessorMatcher() {
//			
//			@Override
//			public Object getMatch(Class target, Set set) {
//				//return B.class
//				return null;
//			}
//		});
		//忽略掉哪些属性
		//jsonConfig.setExcludes(excludes);
		//jsonConfig.setIgnoreDefaultExcludes(ignoreDefaultExcludes);
		//jsonConfig.setIgnoreJPATransient(ignoreJPATransient);
		//jsonConfig.setIgnorePublicFields(ignorePublicFields);
		//jsonConfig.setIgnoreTransientFields(ignoreTransientFields);
		
		
		//jsonConfig.setJsonValueProcessorMatcher(jsonValueProcessorMatcher);
		//jsonConfig.setJsonPropertyNameProcessorMatcher(propertyNameProcessorMatcher);
		jsonConfig.setJsonPropertyFilter(new PropertyFilter() {
			
			@Override
			public boolean apply(Object source, String name, Object value) {
				// TODO Auto-generated method stub
				return false;
			}
		});
		//jsonConfig.setJsonBeanProcessorMatcher(jsonBeanProcessorMatcher);
		//jsonConfig.setJavascriptCompliant(javascriptCompliant);
		
		System.out.println(format(JSONObject.fromObject(p, jsonConfig).toString()));

Json系列之四 揭开JsonConfig的神秘面纱 java to json

标签：

原文地址：http://blog.csdn.net/harrison2010/article/details/43703275