SpringBoot中自定义消息转化器

场景

1.SpringBoot自动配置了消息转化器。

2.自定义消息转化器，只需要在类中添加消息转化器的@Bean,就会被SpringBoot自动加入到容器中。

实现

新建Controller

package com.example.demo.controller;


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

import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@EnableAutoConfiguration
public class TestMessageConvertController {
 
 //定义消息转换器
 //SpringBoot默认配置了消息转换器
 @Bean
 public StringHttpMessageConverter stringHttpMessageConverter() {
  StringHttpMessageConverter stringHttpMessageConverter =new StringHttpMessageConverter(Charset.forName("ISO8859-1"));
  return stringHttpMessageConverter;
 }
 
 @RequestMapping("/testMessageConvert")
 @ResponseBody
 public String testMessageConvert() {
  return "你好！！！";
 }
 public static void main(String[] args) {
  SpringApplication.run(TestMessageConvertController.class, args);
 }
}

运行项目，打开浏览器输入：

​​http://localhost:8080/testMessageConvert​​

由此可见，SpringBoot自带编码过滤器，即使是中文也不会乱码。

实现自定义编码过滤器

package com.example.demo.controller;

import java.nio.charset.Charset;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@EnableAutoConfiguration
public class TestMessageConvertController {
 
 //定义消息转换器
 //SpringBoot默认配置了消息转换器
 @Bean
 public StringHttpMessageConverter stringHttpMessageConverter() {
  StringHttpMessageConverter stringHttpMessageConverter =new StringHttpMessageConverter(Charset.forName("ISO8859-1"));
  return stringHttpMessageConverter;
 }
 
 @RequestMapping("/testMessageConvert")
 @ResponseBody
 public String testMessageConvert() {
  return "你好！！！";
 }
 public static void main(String[] args) {
  SpringApplication.run(TestMessageConvertController.class, args);
 }
}

再运行项目，刷新浏览器