玩转spring boot——国际化

Posted 2020-10-17

前言

这是我的第一篇博客，也是复制大神刘东的代码。大神说：在项目开发中，可能遇到需要国际化，而支持国际化确是一件很头疼的事，但是spring boot给出了一个非常理想和方便的方案。

一、准备工作

pom.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 4     <modelVersion>4.0.0</modelVersion>
 5 
 6     <groupId>com.example</groupId>
 7     <artifactId>spring-boot-14</artifactId>
 8     <version>0.0.1-SNAPSHOT</version>
 9     <packaging>jar</packaging>
10 
11     <name>spring-boot-14</name>
12     <description>Demo project for Spring Boot</description>
13 
14     <parent>
15         <groupId>org.springframework.boot</groupId>
16         <artifactId>spring-boot-starter-parent</artifactId>
17         <version>1.5.3.RELEASE</version>
18         <relativePath/> <!-- lookup parent from repository -->
19     </parent>
20 
21     <properties>
22         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
23         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
24         <java.version>1.8</java.version>
25     </properties>
26 
27     <dependencies>
28         <dependency>
29             <groupId>org.springframework.boot</groupId>
30             <artifactId>spring-boot-starter-thymeleaf</artifactId>
31         </dependency>
32         <dependency>
33             <groupId>org.springframework.boot</groupId>
34             <artifactId>spring-boot-starter-web</artifactId>
35         </dependency>
36 
37         <dependency>
38             <groupId>org.springframework.boot</groupId>
39             <artifactId>spring-boot-devtools</artifactId>
40             <scope>runtime</scope>
41         </dependency>
42         <dependency>
43             <groupId>org.springframework.boot</groupId>
44             <artifactId>spring-boot-starter-test</artifactId>
45             <scope>test</scope>
46         </dependency>
47     </dependencies>
48 
49     <build>
50         <plugins>
51             <plugin>
52                 <groupId>org.springframework.boot</groupId>
53                 <artifactId>spring-boot-maven-plugin</artifactId>
54             </plugin>
55         </plugins>
56     </build>
57 
58 
59 </project>

application.properties

spring.thymeleaf.suffix=.html
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.content-type=text/html
spring.thymeleaf.cache=false

spring.messages.basename=i18n/messages

SpringBootLanguageApplication.java

package com.language;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootLanguageApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootLanguageApplication.class, args);
    }
}

创建国际化配置文件：LocaleConfig.java

package com.language.config;

import java.util.Locale;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;

@Configuration
@EnableAutoConfiguration
@ComponentScan
public class LocaleConfig extends WebMvcConfigurerAdapter {

    @Bean
    public LocaleResolver localeResolver() {
        SessionLocaleResolver slr = new SessionLocaleResolver();
        // 设置默认语言
        slr.setDefaultLocale(Locale.CHINESE);
        return slr;
    }

    @Bean
    public LocaleChangeInterceptor localeChangeInterceptor() {
        LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
        // 设置参数名
        lci.setParamName("lang");
        return lci;
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(localeChangeInterceptor());
    }
}

MainController.java

@GetMapping("/index")
    public String index() {
        System.out.println("============国际化=============");
        return "index";
    }

在resources目录增加两个properties文件，分别为：

messages_en_US.properties:

welcome= welcome to login to alibabawebsite(English)

messages_zh_CN.properties:

welcome = \\u6B22\\u8FCE\\u4F60\\u767B\\u5F55\\u5230 \\u963F\\u91CC\\u5DF4\\u5DF4\\u7F51\\u7AD9\\uFF08\\u4E2D\\u6587\\uFF09

二、前端调用

在thymeleaf模板引擎中使用#{}的标签就能调用messages中的内容了

index.html：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title>spring boot——国际化</title>
</head>
<body>
  <h1>spring boot——国际化</h1>
    <h4>
        <a href="http://www.cnblogs.com/GoodHelper/">from</a>
    </h4>
    <br />
    <br />
    <a href="?lang=en_US">English(US)</a>
    <a href="?lang=zh_CN">简体中文</a>
   
    <br />
    
    <p><label th:text="#{welcome}"></label></p>
    
</body>
</html>

 三、附上项目结构目录