Jersey/Rest 默认字符编码

Jersey / Rest default character encoding(Jersey/Rest 默认字符编码)

问题描述

Jersey 在返回 JSON 时似乎失败了...
这个:

Jersey seems to fail when returning JSON...
This:

@GET
@Produces( MediaType.APPLICATION_JSON + ";charset=UTF-8")
public List<MyObject> getMyObjects() {
    return ....;
}

需要返回 JSON utf-8 编码.如果我只使用

is needed to return JSON utf-8 encoded. If I use only

@Produces( MediaType.APPLICATION_JSON)

失败，例如德语变音符号 (üöä)，将以错误的方式返回.

fails and for example German umlaute (üöä), will be returned in a wrong way.

两个问题:
1 - 对于 JSON utf-8 ist 标准 - 为什么不使用 Jersey?
2 - 如果有 JSON 请求进来，我可以为整个 REST-Servlet 设置 utf-8 吗?

我在 Android 上使用 Jersey 1.5 和 Crest 1.0.1...

Two questions:
1 - For JSON utf-8 ist standard - why not with Jersey?
2 - Can I set utf-8 for the whole REST-Servlet if a JSON Request comes in?

I am using Jersey 1.5 and CRest 1.0.1 on Android...

推荐答案

SRG 的建议很有魅力.然而，由于 Jersey 2.0 的接口略有不同，所以我们不得不稍微调整一下过滤器:

SRGs suggestion works like a charm. However, since Jersey 2.0 the interfaces are slightly different, so we had to adapt the filter a little bit:

import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;

import javax.ws.rs.core.MediaType;

public class CharsetResponseFilter implements ContainerResponseFilter {
    @Override
    public void filter(ContainerRequestContext request, ContainerResponseContext response) {
        MediaType type = response.getMediaType();
        if (type != null) {
            String contentType = type.toString();
            if (!contentType.contains("charset")) {
                contentType = contentType + ";charset=utf-8";
                response.getHeaders().putSingle("Content-Type", contentType);
            }
        }
    }
}

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