如何在Java中将String转换为Hashmap [英] How to convert String into Hashmap in java

问题描述

如何将字符串转换为 HashMap ？

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

进入

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

键是姓氏，姓氏和性别的值是 naresh ， kumar ， male 。

注意：键可以是 city = hyderabad 。

我正在寻找一种通用方法。

I am looking for a generic approach.

推荐答案

这是一种解决方案。如果要使其更通用，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
}

例如，您可以切换

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

到

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

如果使用的是<$ c $中包含的 StringUtils $ c> apache.commons.lang 包。

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

这篇关于如何在Java中将String转换为Hashmap的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！