How to solve nodejs Chinese garbled characters

Node.js has become the first choice for many people in project development, especially in the front-end development process. Using Node.js brings a more efficient and flexible development method. However, some developers will encounter the problem of garbled Chinese characters when using Node.js, which brings a lot of trouble to normal development work. Today, we will discuss the problem of Chinese garbled characters in Node.js and its solution.

1. Problem manifestation

In Node.js, Chinese characters sometimes appear garbled. For example, when using the fs module to read and write files, if the file contains If it contains Chinese characters, garbled characters will appear when reading. In addition, when using Node.js for database operations, if the inserted data contains Chinese characters, garbled characters will appear when reading.

2. Cause of the problem

1. File encoding problem

When Node.js reads the file content, it needs to parse the file encoding. If the file encoding is inconsistent with the Node.js preset encoding, garbled characters will appear. In many cases, garbled characters are caused by file encoding issues.

2. Character encoding problem

When processing strings, if the string encoding is incorrect, it will be incorrectly parsed into garbled characters.

3. Solution

1. File encoding conversion

In Node.js, you can use third-party modulesiconv-lite To convert the file encoding into an encoding format that Node.js can parse. In this way, garbled characters can be avoided when reading files. The code example when reading a file is as follows:

const fs = require('fs');
const iconv = require('iconv-lite');

// 读取文件数据
const fileData = fs.readFileSync('test.txt');

// 将文件编码转换为 utf-8 格式
const data = iconv.decode(fileData, 'gbk');

2. Character encoding conversion

When processing strings, character encoding conversion is required. In Node.js, you can use the iconv-lite module to implement encoding conversion. An example is as follows:

const iconv = require('iconv-lite');

const str = '我是中文字符串';
const encodeStr = iconv.encode(str, 'utf-8'); // 将字符串编码为 utf-8 格式
const decodeStr = iconv.decode(encodeStr, 'utf-8'); // 将编码后的字符串解码为 utf-8 格式

3. Database encoding setting

When making a database connection, you need to set the encoding format of the database. When connecting to the MySQL database, you can set the encoding format through the following code:

const mysql = require('mysql');

const connection = mysql.createConnection({
    host: 'localhost',
    user: 'root',
    password: '',
    database: 'test',
    charset: 'utf8mb4' // 设置数据库编码为 utf8mb4
});

connection.connect();

If the database has been created, you can also modify the encoding format of the MySQL database through the following SQL statement:

ALTER DATABASE test CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;

4. Summary

This article introduces in detail the causes and solutions to the problem of Chinese garbled characters in Node.js. Readers can choose the appropriate method to solve this problem according to the specific situation. In daily development, developers need to carefully handle Chinese characters and their encoding issues to avoid problems.

The above is the detailed content of How to solve nodejs Chinese garbled characters. For more information, please follow other related articles on the PHP Chinese website!