Android

Question

我的正则表达式有问题。当在字符串中设置表达式时会出错。看这个！我想要 returns 数组中具有我搜索值的对象，例如 "Daventry."

我正在使用：{[^{}\]]*Daventry[^{}\]]*}

[
    {
        "id": 113548,
        "name": "Daventry",
        "state_id": 1446,
        "state_name": "Northamptonshire",
        "state_code": "J1",
        "country_id": 232,
        "country_name": "United Kingdom",
        "country_code": "GB",
        "country_flag": "GB.png",
        "currency_code": "GBP",
        "currency_symbol": "£"
    },
    {
        "id": 192392,
        "name": "Daverdisse",
        "state_id": 484,
        "state_name": "Luxembourg",
        "state_code": "06",
        "country_id": 22,
        "country_name": "Belgium\n",
        "country_code": "BE",
        "country_flag": "BE.png",
        "currency_code": "EUR",
        "currency_symbol": "€"
    },
    {
        "id": 115981,
        "name": "Davey",
        "state_id": 4138,
        "state_name": "Nebraska",
        "state_code": "NE",
        "country_id": 233,
        "country_name": "United States\n",
        "country_code": "US",
        "country_flag": "US.png",
        "currency_code": "USD",
        "currency_symbol": "$"
    },
    {
        "id": 142184,
        "name": "David",
        "state_id": 3350,
        "state_name": "Neamt",
        "state_code": "28",
        "country_id": 181,
        "country_name": "Romania\n",
        "country_code": "RO",
        "country_flag": "RO.png",
        "currency_code": "RON",
        "currency_symbol": "lei"
    },
    {
        "id": 108261,
        "name": "David",
        "state_id": 4127,
        "state_name": "Kentucky",
        "state_code": "KY",
        "country_id": 233,
        "country_name": "United States\n",
        "country_code": "US",
        "country_flag": "US.png",
        "currency_code": "USD",
        "currency_symbol": "$"
    }
]

而且只有 returns:

[
        {
            "id": 113548,
            "name": "Daventry",
            "state_id": 1446,
            "state_name": "Northamptonshire",
            "state_code": "J1",
            "country_id": 232,
            "country_name": "United Kingdom",
            "country_code": "GB",
            "country_flag": "GB.png",
            "currency_code": "GBP",
            "currency_symbol": "£"
        }
]

但是报错如下：

java.util.regex.PatternSyntaxException: Syntax error in regexp pattern near index 1: 10-27 09:53:48.297 15052-15052/com.plugapps.freecommerce E/AndroidRuntime: {[/^{}]]Daventry[/^{}]]}

我该怎么办？

Answer 1

在正则表达式中，'{','['等是特殊字符，需要转义，所以要用\{来表示{，所以你的refex表达式是错误所以抛出这样的异常。
其实我不建议你使用正则表达式来搜索你的情况，你最好解析一个jsonarray并检查每个jsonobject的名称。

Android - Java 正则表达式 - 索引附近的正则表达式模式中的语法错误

Android - Java Regex - Syntax error in regexp pattern near index

java

regex

expression