java中如何将String转换成Hashmap

本文介绍了java中如何将String转换成Hashmap的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

如何将 String 转换为 HashMap?

String value = "{first_name = naresh, last_name = kumar, gender = male}"

进入

Map<Object, Object> = {
    first_name = naresh,
    last_name = kumar,
    gender = male
}

其中键是 first_name、last_name 和 gender，值是 naresh、kumar, 男性.

Where the keys are first_name, last_name and gender and the values are naresh, kumar, male.

注意:键可以是任何东西，例如 city = hyderabad.

Note: Keys can be any thing like city = hyderabad.

我正在寻找一种通用的方法.

I am looking for a generic approach.

推荐答案

这是一种解决方案.如果你想让它更通用，你可以使用 StringUtils 库.

This is one solution. If you want to make it more generic, you can use the StringUtils library.

String value = "{first_name = naresh,last_name = kumar,gender = male}";
value = value.substring(1, value.length()-1);           //remove curly brackets
String[] keyValuePairs = value.split(",");              //split the string to creat key-value pairs
Map<String,String> map = new HashMap<>();

for(String pair : keyValuePairs)                        //iterate over the pairs
{
    String[] entry = pair.split("=");                   //split the pairs to get key and value
    map.put(entry[0].trim(), entry[1].trim());          //add them to the hashmap and trim whitespaces
}

比如你可以切换

 value = value.substring(1, value.length()-1);

到

 value = StringUtils.substringBetween(value, "{", "}");

如果您正在使用 apache.commons.lang 包中包含的 StringUtils.

if you are using StringUtils which is contained in apache.commons.lang package.

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Naresh