解决spring3.0.5使用RestTemplate发送post请求响应中文乱码问题-白红宇的个人博客

解决spring3.0.5使用RestTemplate发送post请求响应中文乱码问题

发布日期：2021-05-07 17:55:00 浏览次数：45 分类：精选文章

本文共 9902 字，大约阅读时间需要 33 分钟。

说明：

1：使用spring3.0.5 post响应编码类型，更加请求url响应内容的编码决定，请求的url没有设置响应编码，默认为ISO-8859-1

2: 使用如下代码解析请求：

package com.spring.rest;

import java.io.IOException;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import ognl.ParseException;

import org.springframework.http.HttpEntity;

import org.springframework.http.HttpHeaders;

import org.springframework.http.MediaType;

import org.springframework.http.converter.HttpMessageConverter;

import org.springframework.http.converter.StringHttpMessageConverter;

import org.springframework.web.client.RestTemplate;

import com.alibaba.fastjson.JSONObject;

public class RestTempLateClient {

/**

* 模拟请求

* @param url 资源地址

* @param map 参数列表

* @param encoding 编码

* @return

* @throws ParseException

* @throws IOException

public static String send(String url, Map<String,Object> map,String encoding) {

RestTemplate restTemplate = new RestTemplate();

//3.1.X以上版本使用

//restTemplate.getMessageConverters().add(0, StringHttpMessageConverter.DEFAULT_CHARSET);

List<HttpMessageConverter<?>> converterList=restTemplate.getMessageConverters();

HttpMessageConverter<?> converter = new StringHttpMessageConverter();

converterList.add(0, converter);

restTemplate.setMessageConverters(converterList);

HttpHeaders headers = new HttpHeaders();

MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");

headers.setContentType(type);

headers.add("Accept", MediaType.APPLICATION_JSON.toString());

//map 转换为json对象

JSONObject jsonObj = new JSONObject(map);

HttpEntity<String> formEntity = new HttpEntity<String>(jsonObj.toString(), headers);

String result = restTemplate.postForObject(url, formEntity, String.class);

return result;

}

public static void main(String[] args) throws ParseException, IOException {

String url="http://php.weather.sina.com.cn/iframe/index/w_cl.php";

Map<String, Object> map = new HashMap<String, Object>();

map.put("code", "js");

map.put("day", "0");

map.put("city", "上海");

map.put("dfc", "1");

map.put("charset", "utf-8");

String body = send(url, map,"utf-8");

System.out.println("交易响应结果：");

System.out.println(body);

System.out.println("-----------------------------------");

map.put("city", "北京");

body = send(url, map, "utf-8");

System.out.println("交易响应结果：");

System.out.println(body);

}

请求结果如下：

log4j:WARN No appenders could be found for logger (org.springframework.web.client.RestTemplate).

log4j:WARN Please initialize the log4j system properly.

log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

交易响应结果：

-----------------------------------

交易响应结果：

解决办法：

1：修改spring源码，将编码改为gbk； ---- 是一个方法，感觉不太好

2：拷贝spring中的StringHttpMessageConverter类源码，做为一个单独的类，修改编码

package com.spring.rest;

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.UnsupportedEncodingException;

import java.nio.charset.Charset;

import java.util.ArrayList;

import java.util.List;

import org.springframework.http.HttpInputMessage;

import org.springframework.http.HttpOutputMessage;

import org.springframework.http.MediaType;

import org.springframework.http.converter.AbstractHttpMessageConverter;

import org.springframework.util.FileCopyUtils;

/**

* Implementation of {@link HttpMessageConverter} that can read and write strings.

* <p>By default, this converter supports all media types (<code>*/*</code>), and writes with a {@code

* Content-Type} of {@code text/plain}. This can be overridden by setting the {@link

* #setSupportedMediaTypes(java.util.List) supportedMediaTypes} property.

* @author Arjen Poutsma

* @since 3.0

public class StringHttpMessageConverter extends AbstractHttpMessageConverter<String> {

public static final Charset DEFAULT_CHARSET = Charset.forName("gbk");

private final List<Charset> availableCharsets;

private boolean writeAcceptCharset = true;

public StringHttpMessageConverter() {

super(new MediaType("text", "plain", DEFAULT_CHARSET), MediaType.ALL);

this.availableCharsets = new ArrayList<Charset>(Charset.availableCharsets().values());

}

/**

* Indicates whether the {@code Accept-Charset} should be written to any outgoing request.

* <p>Default is {@code true}.

public void setWriteAcceptCharset(boolean writeAcceptCharset) {

this.writeAcceptCharset = writeAcceptCharset;

}

@Override

public boolean supports(Class<?> clazz) {

return String.class.equals(clazz);

}

@Override

protected String readInternal(Class clazz, HttpInputMessage inputMessage) throws IOException {

MediaType contentType = inputMessage.getHeaders().getContentType();

Charset charset = contentType.getCharSet() != null ? contentType.getCharSet() : DEFAULT_CHARSET;

return FileCopyUtils.copyToString(new InputStreamReader(inputMessage.getBody(), charset));

}

@Override

protected Long getContentLength(String s, MediaType contentType) {

if (contentType != null && contentType.getCharSet() != null) {

Charset charset = contentType.getCharSet();

try {

return (long) s.getBytes(charset.name()).length;

}

catch (UnsupportedEncodingException ex) {

// should not occur

throw new InternalError(ex.getMessage());

}

else {

return null;

}

@Override

protected void writeInternal(String s, HttpOutputMessage outputMessage) throws IOException {

if (writeAcceptCharset) {

outputMessage.getHeaders().setAcceptCharset(getAcceptedCharsets());

}

MediaType contentType = outputMessage.getHeaders().getContentType();

Charset charset = contentType.getCharSet() != null ? contentType.getCharSet() : DEFAULT_CHARSET;

FileCopyUtils.copy(s, new OutputStreamWriter(outputMessage.getBody(), charset));

}

/**

* Return the list of supported {@link Charset}.

* <p>By default, returns {@link Charset#availableCharsets()}. Can be overridden in subclasses.

* @return the list of accepted charsets

protected List<Charset> getAcceptedCharsets() {

return this.availableCharsets;

}

package com.spring.rest;

import java.io.IOException;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import ognl.ParseException;

import org.springframework.http.HttpEntity;

import org.springframework.http.HttpHeaders;

import org.springframework.http.MediaType;

import org.springframework.http.converter.HttpMessageConverter;

import org.springframework.web.client.RestTemplate;

import com.alibaba.fastjson.JSONObject;

public class RestTempLateClient {

/**

* 模拟请求

* @param url 资源地址

* @param map 参数列表

* @param encoding 编码

* @return

* @throws ParseException

* @throws IOException

public static String send(String url, Map<String,Object> map,String encoding) {

RestTemplate restTemplate = new RestTemplate();

//3.1.X以上版本使用

//restTemplate.getMessageConverters().add(0, StringHttpMessageConverter.DEFAULT_CHARSET);

List<HttpMessageConverter<?>> converterList=restTemplate.getMessageConverters();

HttpMessageConverter<?> converter = new StringHttpMessageConverter();

converterList.add(0, converter);

restTemplate.setMessageConverters(converterList);

HttpHeaders headers = new HttpHeaders();

MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");

headers.setContentType(type);

headers.add("Accept", MediaType.APPLICATION_JSON.toString());

//map 转换为json对象

JSONObject jsonObj = new JSONObject(map);

HttpEntity<String> formEntity = new HttpEntity<String>(jsonObj.toString(), headers);

String result = restTemplate.postForObject(url, formEntity, String.class);

return result;

}

public static void main(String[] args) throws ParseException, IOException {

String url="http://php.weather.sina.com.cn/iframe/index/w_cl.php";

Map<String, Object> map = new HashMap<String, Object>();

map.put("code", "js");

map.put("day", "0");

map.put("city", "上海");

map.put("dfc", "1");

map.put("charset", "utf-8");

String body = send(url, map,"utf-8");

System.out.println("交易响应结果：");

System.out.println(body);

System.out.println("-----------------------------------");

map.put("city", "北京");

body = send(url, map, "utf-8");

System.out.println("交易响应结果：");

System.out.println(body);

}

响应结果：

log4j:WARN No appenders could be found for logger (org.springframework.web.client.RestTemplate).

log4j:WARN Please initialize the log4j system properly.

log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

交易响应结果：

-----------------------------------

交易响应结果：

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