【fastjs】【报错原因】JSON parse error: syntax error, expect {, actual int, pos 225, fastjson-version 1.2.69

雨点打透心脏的1/2处 2022-11-06 11:54 37阅读 0赞

> #  报错org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: syntax error, expect \{, actual int, pos 225, fastjson-version 1.2.69; nested exception is com.alibaba.fastjson.JSONException: syntax error, expect \{, actual int, pos 225, fastjson-version 1.2.69 #

##  报错代码： ##

>     org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: syntax error, expect {, actual int, pos 225, fastjson-version 1.2.69; nested exception is com.alibaba.fastjson.JSONException: syntax error, expect {, actual int, pos 225, fastjson-version 1.2.69
>     	at com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter.readType(FastJsonHttpMessageConverter.java:271)
>     	at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
>     	at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
>     	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
>     	at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
>     	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>     	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>     	at java.lang.Thread.run(Thread.java:745)
>     Caused by: com.alibaba.fastjson.JSONException: syntax error, expect {, actual int, pos 225, fastjson-version 1.2.69
>     	at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:503)
>     com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:686)
>     	at com.alibaba.fastjson.JSON.parseObject(JSON.java:396)
>     	at com.alibaba.fastjson.JSON.parseObject(JSON.java:461)
>     	at com.alibaba.fastjson.JSON.parseObject(JSON.java:569)
>     	at com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter.readType(FastJsonHttpMessageConverter.java:263)
>     	... 101 common frames omitted
> 
>

## 报错原因： ##

###    1.传入的json数据有问题，跟接收类型不匹配。 ###

**      - 建议重点检查传入的json数据与接受数据的类型。例如前端传进来的是String,后台接受的是Integer，这是最常犯的错误。**

例如这里的roles是一个list,而前端返回的是一个Int

@Data
    @ApiModel(description = "用户页面模型")
    @EqualsAndHashCode(callSuper = true)
    public class UserVO extends BaseVO {
    
        @ApiModelProperty(value = "用户名", notes = "用户登录名", required = true)
        private String username;
    
        @ApiModelProperty(value = "密码", notes = "用户登录密码", required = true)
        private String password;
    
        @ApiModelProperty(value = "中文名")
        private String chineseName;
    
        @ApiModelProperty(value = "职位")
        private String position;
    
        @ApiModelProperty(value = "电话")
        private String phone;
    
        @ApiModelProperty(value = "邮箱地址")
        private String mailAddress;
        @ApiModelProperty(value = "组织架构id",example = "1")
        private Integer organizationId;
    
        private String organizationName;
    
        @ApiModelProperty(value = "用户状态",example = "1")
        private Integer status;
    
        @ApiModelProperty(value = "手机号码",example = "0")
        private String mobilePhone;
    
        @ApiModelProperty(value = "性别", example = "1", notes = "M:男,W:女,S:秘密")
        private Integer gender;
    
        @ApiModelProperty(value = "身份证号码", example = "0")
        private String identityCard;
    
        @ApiModelProperty(value = "描述")
        private String description;
    
        @ApiModelProperty(value = "用户包含的角色信息集合")
        private List<RoleVO> roles;
    
        @ApiModelProperty(value = "是否初始化",example = "1",notes = "0:未初始化，1：已初始化")
        private Long initialize;
    }

前端JSON：roles是一个Int

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1bmZlYXRoZXI_size_16_color_FFFFFF_t_70][]**   **

**   -检查自定义类型是否与Json数据是否匹配，例如自定义类型里面还定义了一个对象，而返回来的json数据中不包含这个对象，这也是常犯的错误。**

###    2.url地址写错了。 ###

**   -有时候url地址写错了，也会报这个错误，不过比较少见**

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