com.alibaba.fastjson.JSONException: illegal identifier : pos 3, json

缺乏、安全感 2022-09-15 05:46 240阅读 0赞

# 项目场景： #

在改造基于消息队列请求的接口时, 利用paho模拟发送数据, 项目上解析报错

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# 问题描述： #

发送的数据格式如下

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5pe26Ze06Z2Z5q2i5LiN5piv566A5Y-y_size_12_color_FFFFFF_t_70_g_se_x_16]

**项目报错截图如下**

![在这里插入图片描述][25f6e6d342144eb68affbea16a95cd55.png]  
错误详情

com.alibaba.fastjson.JSONException: illegal identifier :  pos 3, json : { 
        "machineKey":"111",
        "data":[
            { 
                "businessCode":"002",
                "businessName":"办电",
                "businessType":"缴费",
                "businessHallName":"城南"
            },
            { 
                "businessCode":"003",
                "businessName":"开户",
                "businessType":"业务",
                "businessHallName":"城南"
            }
        ]
    }
    	at com.alibaba.fastjson.parser.JSONLexerBase.scanSymbolUnQuoted(JSONLexerBase.java:829)
    	at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:278)
    	at com.alibaba.fastjson.parser.DefaultJSONParser.parse(DefaultJSONParser.java:1335)
    	at com.alibaba.fastjson.parser.DefaultJSONParser.parse(DefaultJSONParser.java:1301)
    	at com.alibaba.fastjson.JSON.parse(JSON.java:152)
    	at com.alibaba.fastjson.JSON.parse(JSON.java:162)
    	at com.alibaba.fastjson.JSON.parse(JSON.java:131)
    	at com.alibaba.fastjson.JSON.parseObject(JSON.java:223)
    	at com.sxd.onlinereservation.mqtt.PushCallback.messageArrived(PushCallback.java:83)
    	at org.eclipse.paho.client.mqttv3.internal.CommsCallback.deliverMessage(CommsCallback.java:499)
    	at org.eclipse.paho.client.mqttv3.internal.CommsCallback.handleMessage(CommsCallback.java:402)
    	at org.eclipse.paho.client.mqttv3.internal.CommsCallback.run(CommsCallback.java:206)
    	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
    	at java.util.concurrent.FutureTask.run(FutureTask.java)
    	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    	at java.lang.Thread.run(Thread.java:748)

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# 原因分析： #

1.  首先进行JSON格式校验(我这里是对的) , 地址 https://www.sojson.com/simple\_json.html
2.  **因为使用的是格式美化好的json(如下代码), 因此每行前面都有空格, 在fastJson接收这些数据时, 会将空格转成`\r\n`等类似的格式导致解析异常, 需要将前面空格去掉!!!**
    
        { 
            "machineKey":"111",
            "data":[
                { 
                    "businessCode":"002",
                    "businessName":"办电",
                    "businessType":"缴费",
                    "businessHallName":"城南"
                },
                { 
                    "businessCode":"003",
                    "businessName":"开户",
                    "businessType":"业务",
                    "businessHallName":"城南"
                }
            ]
        }

# 解决方案： #

改成如下格式:

{ 
    "machineKey":"111",
    "data":[
    { 
    "businessCode":"002",
    "businessName":"办电",
    "businessType":"缴费",
    "businessHallName":"城南"
    },
    { 
    "businessCode":"003",
    "businessName":"开户",
    "businessType":"业务",
    "businessHallName":"城南"
    }
    ]
    }

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5pe26Ze06Z2Z5q2i5LiN5piv566A5Y-y_size_12_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/40132cad5d9c480bb4956585da41134f.png
[25f6e6d342144eb68affbea16a95cd55.png]: /images/20220828/da87934a9c1b4e9a8afceda204d11eee.png