Question

我正在尝试使用Mailgun和Jersey从Android应用发送电子邮件。问题是当我发布请求以获得响应时，应用程序崩溃并出现错误：A message body writer for Java type, class com.sun.jersey.multipart.FormDataMultiPart, and MIME media type, application/x-www-form-urlencoded, was not found。我不确定为什么会这样。研究这个建议你在创建客户端时添加multipart类，但这也不起作用。请注意，在此电子邮件中，它只是纯文本，但我需要在应用程序中发送可能包含附件的另一封电子邮件 - 0个或更多图像。

java class：

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import com.sun.jersey.api.client.filter.HTTPBasicAuthFilter;
import com.sun.jersey.multipart.FormDataMultiPart;
import com.sun.jersey.multipart.impl.MultiPartWriter;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

ClientConfig cc = new DefaultClientConfig();
cc.getClasses().add(MultiPartWriter.class);
Client theClient = Client.create(cc);
theClient.addFilter(new HTTPBasicAuthFilter("api", "my_api_key"));

final WebResource theWebResource = theClient.resource("https://api.mailgun.net/v3/"
                                                        + "mailgun_domain_key"
                                                        + "/messages");

final FormDataMultiPart message = new FormDataMultiPart();
message.field("from", "My App <donotreply@dnr.com>");
message.field("to", "email_recs");
message.field("subject", "subj");
message.field("text", "body_text");

ClientResponse response = theWebResource.type(MediaType.APPLICATION_FORM_URLENCODED).post(ClientResponse.class, message);
//app crashes after the above line is executed

build.gradle（module）：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.x.x"
        minSdkVersion 14
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    packagingOptions{
        pickFirst 'META-INF/jersey-module-version'
        pickFirst 'META-INF/services/com.sun.jersey.spi.inject.InjectableProvider'
        pickFirst 'META-INF/services/javax.ws.rs.ext.MessageBodyReader'
        pickFirst 'META-INF/services/javax.ws.rs.ext.MessageBodyWriter'
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile 'com.parse.bolts:bolts-android:1.+'
    compile fileTree(dir: 'libs', include: 'Parse-*.jar')
    compile files('libs/jersey-client-1.19.jar')
    compile files('libs/jersey-core-1.19.jar')
    compile files('libs/jersey-multipart-1.19.jar')
    compile files('libs/javax.ws.rs.jar')
    compile files('libs/jai_imageio-1.1.jar')
}

Answer 1

看看这个

theWebResource.type(MediaType.APPLICATION_FORM_URLENCODED)

您尝试发布一个旨在用作多部分请求的对象FormDataMultiPart，但您要将Content-Type设置为application/x-www-form-urlencoded。

您只需将Content-Type更改为multipart/form-data ^{[ 1 ]}或MediaType.MULTIPART_FORM_DATA。

<子> 1。正如API documentation

中所述

使用Mailgun发送电子邮件 - 找不到Java类型FormDataMultiPart和MIME媒体类型application / x-www-form-urlencoded的邮件正文编写器

1 个答案: