在golang中解析属性文件中的值 [英] parsing values from property file in golang

问题描述

对于Java，有一个Properties类，该类提供了用于解析属性文件或与属性文件进行交互的功能.

For Java there is the Properties class that offers functionality to parse / interact with property file.

golang标准库中是否有类似内容?

Is there something similar in golang standard library ?

如果没有，我还有什么其他选择?

If not, what other alternatives do I have ?

推荐答案

在@Madhu的答案的基础上，您可以创建一个非常简单的程序包以使用Scanner读取属性文件，并逐行读取跳过无效的文件行(没有'='字符的行):

Adding on top of @Madhu's answer, you can create a very simple package to read a properties file using Scanner, and read line by line of your file skipping invalid lines (those not having the '=' char):

示例:

package fileutil

import (
    "bufio"
    "os"
    "strings"
    "log"
)

type AppConfigProperties map[string]string

func ReadPropertiesFile(filename string) (AppConfigProperties, error) {
    config := AppConfigProperties{}

    if len(filename) == 0 {
        return config, nil
    }
    file, err := os.Open(filename)
    if err != nil {
        log.Fatal(err)
        return nil, err
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        line := scanner.Text()
        if equal := strings.Index(line, "="); equal >= 0 {
            if key := strings.TrimSpace(line[:equal]); len(key) > 0 {
                value := ""
                if len(line) > equal {
                    value = strings.TrimSpace(line[equal+1:])
                }
                config[key] = value
            }
        }
    }

    if err := scanner.Err(); err != nil {
        log.Fatal(err)
        return nil, err
    }

    return config, nil
}

样本测试sample_test.properties:

Sample test sample_test.properties :

host=localhost
proxyHost=test
protocol=https://
chunk=

属性测试:

package fileutil

import (
    "testing"
)

func TestReadPropertiesFile(t *testing.T) {
    props, err := ReadPropertiesFile("sample_test.properties")
    if err != nil {
        t.Error("Error while reading properties file")
    }

    if props["host"] != "localhost" || props["proxyHost"] != "test" || props["protocol"] != "https://" || props["chunk"] != "" {
        t.Error("Error properties not loaded correctly")
    }

}

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