java 后台解析前台传json串双引号转义问题

最新推荐文章于 2023-12-26 16:39:11 发布

jywhale

最新推荐文章于 2023-12-26 16:39:11 发布

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本文链接：https://blog.youkuaiyun.com/Z_jingyu/article/details/77073377

在JSP页面中，当传递包含双引号的JSON字符串到Java后台时，双引号被自动转义导致Gson解析失败。为了解决这个问题，可以使用Apache的StringEscapeUtils工具类的unescapeHtml4方法进行转义处理，从而成功转换JSON字符串。

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jsp 页面传的String ：

"[{"prodIndex":1,"catOne":"311","catOneName":"轮式拖拉机","brandId":"3","brand":"东方红","model":"LX600","njName":"轮式拖拉机 LX600 东方红","num":"2","referPrice":0,"referTotalPrice":0}]"

由于双引号会被转义：

[{"prodIndex":1,"catOne":"311","catOneName":"轮式拖拉机","brandId":"3","brand":"东方红","model":"LX600","njName":"轮式拖拉机 LX600 东方红","num":"2","referPrice":0,"referTotalPrice":0}]

这时用gson转出时会提示报错

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Expected ':' at line 1 column 9 path $[0].&quot
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)

解决办法使用 StringEscapeUtils 工具类中 unescapeHtml4 方法可以转义

String newJson = StringEscapeUtils.unescapeHtml4(jsonStr);

[
    {
        "prodIndex": 1,
        "catOne": "311",
        "catOneName": "轮式拖拉机",
        "brandId": "3",
        "brand": "东方红",
        "model": "LX600",
        "njName": "轮式拖拉机 LX600 东方红",
        "num": "2",
        "referPrice": "0",
        "referTotalPrice": "0"
    }
]