关于springMVC的@ResponseBody乱码问题

最新推荐文章于 2023-07-14 12:00:25 发布

原创最新推荐文章于 2023-07-14 12:00:25 发布 · 183 阅读

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#springMVC @ResponseBody 中文乱码

本文介绍了一种解决Spring MVC框架中@ResponseBody返回中文时出现乱码的方法。通过自定义UTF8StringHttpMessageConverter类并覆盖默认的字符集设置，成功实现了中文的正确显示。

百度，iteye上面一搜索，一大推文章，但是按照类似的配置，都不起作用，按照一些文章的写法，继承了StringHttpMessageConverter 也无法解决问题，无奈之下，翻了翻源码，重新写个一个关于@ResponseBody的内容编码，解决。

@ResponseBody默认采取

public static final Charset DEFAULT_CHARSET = Charset.forName("ISO-8859-1");

的方式，我要修改为UTF-8，所以，就直接copy了源码，但是修改了一下里边的默认编码

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;

/**
 * @Author : wangxl
 * @Date : 2013-1-17
 */
public class UTF8StringHttpMessageConverter extends AbstractHttpMessageConverter<String> {

	public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
	private final List<Charset> availableCharsets;
	private boolean writeAcceptCharset = true;

	public UTF8StringHttpMessageConverter() {
		super(new MediaType[] {
				new MediaType("text", "plain",
						UTF8StringHttpMessageConverter.DEFAULT_CHARSET),
				MediaType.ALL });
		this.availableCharsets = new ArrayList<Charset>(Charset.availableCharsets().values());
	}

	public void setWriteAcceptCharset(boolean writeAcceptCharset) {
		this.writeAcceptCharset = writeAcceptCharset;
	}

	public boolean supports(Class<?> clazz) {
		return String.class.equals(clazz);
	}

	@SuppressWarnings("rawtypes")
	protected String readInternal(Class clazz, HttpInputMessage inputMessage) throws IOException {
		Charset charset = getContentTypeCharset(inputMessage.getHeaders().getContentType());
		return FileCopyUtils.copyToString(new InputStreamReader(inputMessage.getBody(), charset));
	}

	protected Long getContentLength(String s, MediaType contentType) {
		Charset charset = getContentTypeCharset(contentType);
		try {
			return Long.valueOf(s.getBytes(charset.name()).length);
		} catch (UnsupportedEncodingException ex) {

			throw new InternalError(ex.getMessage());
		}
	}

	protected void writeInternal(String s, HttpOutputMessage outputMessage) throws IOException {
		if (this.writeAcceptCharset) {
			outputMessage.getHeaders().setAcceptCharset(getAcceptedCharsets());
		}
		Charset charset = getContentTypeCharset(outputMessage.getHeaders().getContentType());
		FileCopyUtils.copy(s, new OutputStreamWriter( outputMessage.getBody(), charset));
	}
	protected List<Charset> getAcceptedCharsets() {
		return this.availableCharsets;
	}
	private Charset getContentTypeCharset(MediaType contentType) {
		if ((contentType != null) && (contentType.getCharSet() != null)) {
			return contentType.getCharSet();
		}
		return DEFAULT_CHARSET;
	}
}

然后，修改spring的注入配置，将自己编写的类注入到org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter中，配置代码如下

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
	    <property name="messageConverters">
	        <list>
	            <bean id="utf8StringHttpMessageConverter" class="**.UTF8StringHttpMessageConverter" />
	        </list>
	    </property>
	</bean>

终于接受到了中文，谢天谢地~搞了一上午加2个小时

PS:配置写在spring扫描servlet之前