MyFastJson 个人笔记

我就是我 2022-05-10 08:44 261阅读 0赞

转换用的实体 RiskSettings

public class RiskSettings  implements Serializable{
    	/**
    	 * 标识code 
    	 */
    	private String code;
    	public String getCode() {
    		return code;
    	}
    	public void setCode(String code) {
    		this.code = code;
    	}
    }

## Object < ---- >String ##

import java.util.List;
    import java.util.Map;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONObject;
    import com.alibaba.fastjson.TypeReference;
    import com.shopuu.server.finance.risk.models.RiskSettings;
    
    
    		// Object  -->String
    		RiskSettings javaObject=new RiskSettings();
    		javaObject.setCode("3223");
    	
    		String string = JSONObject.toJSON(javaObject).toString();
    		System.out.println(string);//{"code":"3223"}
    		
    		// String  -->Object
    		RiskSettings parseObject = JSON.parseObject(string, RiskSettings.class);
    		String code = parseObject.getCode();
    		System.out.println(code);//3223

## //String < ---- >JsonObject < ---- >Object ##

//String -->JsonObject -->Object
    		JSONObject jo = JSONObject.parseObject(string);
    		RiskSettings rs = JSONObject.toJavaObject(jo,  RiskSettings.class);
    		System.out.println(rs.getCode());//3223
    		
    		RiskSettings rs2 = JSON.toJavaObject(jo, RiskSettings.class);
    		System.out.println(rs2.getCode());//3223
    
    		//Object -->String --> JsonObject 
    		String jsonString = JSON.toJSONString(rs);
    		JSONObject jo1 = JSONObject.parseObject(string);
    
    //	String 串封装成对象类型的json    {"code":"3223"}
    		JSONObject jo = JSONObject.parseObject(string);
    		JSONObject content = new JSONObject();
    		content.put("riskSettings", jo);
    		System.out.println(content.toString());//{"riskSettings":{"code":"3223"}}

## String < ---- >Map < ---- > Object ##

public <T> void strTmap(String string){
    	
    		//String -->Map
    		Map<String, T> map = JSONObject.parseObject(string, Map.class);
    		System.out.println(map.get("code")); //3223
    	
    		//Map -->String -->Object
    		String jsonString = JSONObject.toJSONString(map);
    		RiskSettings ts2 = JSON.parseObject(jsonString, RiskSettings.class);
    		System.out.println(ts2.getCode());//3223
    	}

## //String --> list < Object > ##

//String --> list<Object>
    		String string="[{\"code\":\"3223\"},{\"code\":\"3223\"},{\"code\":\"3223\"}]";
    		 List<String> l1 =JSON.parseArray(string, String.class);
    		 List<RiskSettings> l2 =JSON.parseArray(string, RiskSettings.class);
    		 List<Map<String,Object>> l3 =JSON.parseObject(string, new TypeReference<List<Map<String,Object>>>(){});
    
    	list<Object>也是一种  Object

本篇幅做的是最简单的转换，并没有添加过滤条件， 如果 后续项目需要再补充