Vertx和Jersey集成使用

为了更好地解耦和提高性能，一般将工程的接口部分剥离出来形成一个单独的工程，这样不仅能提高性能，增强可维护性，并且在后台工程宕掉的话对客户端接口的影响较小。

公司使用了Vertx和Jersey，Vert.x是一个基于JVM、轻量级、高性能的应用平台，非常适用于最新的移动端后台、互联网、企业应用架构。Vert.x基于全异步Java服务器Netty，并扩展出了很多有用的特性;Jersey RESTful 框架是开源的RESTful框架, 实现了JAX-RS (JSR 311 & JSR 339) 规范。它扩展了JAX-RS 参考实现，提供了更多的特性和工具，可以进一步地简化 RESTful service 和 client 开发。尽管相对年轻，它已经是一个产品级的 RESTful service 和 client 框架。与Struts类似，它同样可以和hibernate,spring框架整合。程序中主要与jersey打交道。使用binder绑定filter和processor到内核中，做一些前置处理。基本的工程样子如下：

启动一个MainVerticle，用于整个程序的初始化和启动jersey服务器。

/**
* 运行方式：Windows：dy-server-api.bat run java-hk2:cn.esstx.dzg.api.tinyhttp.MainVerticle
* Linux: nohup ./bin/dy-server-api run java-hk2:cn.esstx.dzg.api.tinyhttp.MainVerticle &
* nohup ./bin/dy-server-api run java-hk2:cn.esstx.dzg.api.tinyhttp.MainVerticle -Dlogback.configurationFile=config/logback.xml &
*/
public class MainVerticle extends AbstractVerticle {
//日志框架最好使用slf4j，这样很好滴更换底层实现，例如使用log4j，logback，jdklog
public static void main(String[] args) {
// Create an HTTP server which simply returns "Hello World!" to each request.
Runner.runServer(MainVerticle.class);
}

@Override
public void start() throws Exception {
/*程序的其他一些初始化，我们工程就需要初始化JFinal和系统的配置文件*/

DeploymentOptions options = new DeploymentOptions();
String path = new PropertiesConfiguration("config/config.json").getPath();
//System.out.println(path);
JsonObject config = JsonConfigUtil.loadConfig(path);
options.setConfig(config);
vertx.deployVerticle("java-hk2:com.englishtown.vertx.jersey.JerseyVerticle", options);
}
}

public class Runner{

private static final String WEB_JAVA_DIR = "/src/main/java/";

public static void runClusteredServer(Class<?> clazz){
runServer(WEB_JAVA_DIR, clazz, new VertxOptions().setClustered(true), null);
}

public static void runServer(Class<?> clazz){
runServer(WEB_JAVA_DIR, clazz, new VertxOptions().setClustered(false), null);
}

public static void runServer(Class<?> clazz, DeploymentOptions options){
runServer(WEB_JAVA_DIR, clazz, new VertxOptions().setClustered(false), options);
}

public static void runServer(String dir, Class<?> clazz, VertxOptions options,
DeploymentOptions deploymentOptions){
runServer(dir + clazz.getPackage().getName().replace(".", "/"), clazz.getName(), options,
deploymentOptions);
}

public static void runScriptServer(String prefix, String scriptName, VertxOptions options){
File file = new File(scriptName);
String dirPart = file.getParent();
String scriptDir = prefix + dirPart;
runServer(scriptDir, scriptDir + "/" + file.getName(), options, null);
}

public static void runServer(String dir, String verticleID, VertxOptions options,
DeploymentOptions deploymentOptions){
if(options == null){
// Default parameter
options = new VertxOptions();
}
// Smart cwd detection

// Based on the current directory (.) and the desired directory
// (exampleDir), we try to compute the vertx.cwd
// directory:
try{
// We need to use the canonical file. Without the file name is .
File current = new File(".").getCanonicalFile();
if(dir.startsWith(current.getName()) && !dir.equals(current.getName())){
dir = dir.substring(current.getName().length() + 1);
}
}
catch(IOException e){
// Ignore it.
}
System.out.println(dir);
System.out.println(verticleID);
System.setProperty("vertx.cwd", dir);
Consumer<Vertx> runner = vertx -> {
try{
if(deploymentOptions != null){
vertx.deployVerticle(verticleID, deploymentOptions);
} else{
vertx.deployVerticle(verticleID);
}
}
catch(Throwable t){
t.printStackTrace();
}
};
if(options.isClustered()){
Vertx.clusteredVertx(options, res -> {
if(res.succeeded()){
Vertx vertx = res.result();
runner.accept(vertx);
} else{
res.cause().printStackTrace();
}
});
} else{
Vertx vertx = Vertx.vertx(options);
runner.accept(vertx);
}
}
}
{
"host": "localhost",
"port": 9090,
"base_path": "/rest/dy",
"resources": ["cn.esstx.dzg.api.tinyhttp.resources"],
"features": [],
//"binders": ["cn.esstx.dzg.api.tinyhttp.binder.RequestBinder"],//仅对filter有用
"hk2_binder": [
"com.englishtown.vertx.hk2.BootstrapBinder",
"cn.esstx.dzg.api.tinyhttp.binder.RequestBinder"
]
}
具体的使用方式：

@Path("/test")
public class TestResouce {

@GET
public String doGet() {
return "Hello World!";
}
@POST
@Produces(MediaType.APPLICATION_JSON)
public MyObject getJson() {
MyObject o = new MyObject();
o.setName("Andy");
return o;
}

@GET
@Path("jsonp")
@JSONP(queryParam = "cb")
@Produces("application/javascript")
public MyObject getJsonPadding() {
MyObject o = new MyObject();
o.setName("Andy");
return o;
}

@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public MyObject postJson(MyObject in) {
return in;
}

@POST
@Path("json")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public JsonObject postJson2(JsonObject in) {
return in;
}

@GET
@Path("async")
@Produces(MediaType.APPLICATION_JSON)
public void getJsonAsync(@Suspended final AsyncResponse asyncResponse, @Context Vertx vertx) {
vertx.runOnContext(aVoid -> {
MyObject o = new MyObject();
o.setName("Andy");
asyncResponse.resume(o);
});
}

public static class MyObject {

private String name;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}

////////////////测试Post和Get获取参数/////////////////
//get可以使用@Context、@QueryParam/////
//post可以使用@FormParam、MultivaluedMap<String, String> formParams
//都可以使用@DefaultValue/////////////
//QueryParam--url ? 后面表示的参数 . get post 通用.
//PathParam---url中的一部分，例如用{}表示的url中的一部分。get post 通用。
//FormParam---post提交的form表单参数。用于 post
@GET
@Path("/dd")
public String getRequest(@Context HttpServerRequest request) {
String dd = request.params().get("dd");
System.out.println(dd);
return dd;
}
@GET
@Path("/ds")
public String getQuery(@QueryParam("dd") String dd) {
return dd;
}
@POST
@Path("/dd")
@Produces(MediaType.APPLICATION_JSON)
public String postForm(
@FormParam(value = "dd") String dd,
@FormParam(value = "ds") String ds) {
System.out.println(dd+ds);
return dd+ds;
}
@POST
@Path("/ds")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces(MediaType.APPLICATION_JSON)
public String postRequest(
@DefaultValue("dd")
@FormParam("dd")
String dd) {
return dd;
}

@POST
@Path("/ss")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces(MediaType.APPLICATION_JSON)
public String postJson(@DefaultValue("dd") @FormParam("dd") String dd) {
JsonObject object = new JsonObject();
object.put("dd", dd);
return object.toString();
}

@POST
@Path("/sd")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces(MediaType.APPLICATION_JSON)
public String postContext(MultivaluedMap<String, String> formParams) {
String dd = formParams.getFirst("dd");
List<String> ds = formParams.get("ds");
return dd+ds.toString();
}

@POST
@Path("/sssss")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces(MediaType.APPLICATION_JSON)
public String postQuery(@QueryParam("ss") String ss,@FormParam("dd") String dd) {
return dd+ss;//?ss=ss dd=dd
}

@POST
@Path("/sssss2")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces(MediaType.APPLICATION_JSON)
//http://localhost:9090/rest/dy/test/sssss2?ss=ss&sd=sd
public String postQuery2(MultivaluedMap<String, String> params) {
for(String ss:params.keySet()){
System.out.println(params.getFirst(ss));//只有form里面的
}
return ""+params.size();
}

@POST
@Path("/redirect")
@Produces(MediaType.TEXT_HTML)
public String redirect(){
return Utils.redirectTo("http://www.hao123.com");
}
}

/**
*
* @param location 需要重定向的位置
* @des 利用meta标签实现重定向
*/
public static String redirectTo(String location){
return "<!DOCTYPE><HTML><HEAD><TITLE>跳转页面</TITLE><meta http-equiv="refresh" content="0; URL="+location+""></HEAD><BODY></BODY></HTML>";
}

上传文件：

添加jar

// https://mvnrepository.com/artifact/org.glassfish.jersey.media/jersey-media-multipart
compile group: 'org.glassfish.jersey.media', name: 'jersey-media-multipart', version: '2.17'

配置文件中："features": ["org.glassfish.jersey.media.multipart.MultiPartFeature"]

DefaultJerseyHandler中的shouldReadData中添加

if(MediaType.MULTIPART_FORM_DATA_TYPE.getType().equalsIgnoreCase(mediaType.getType())
&& MediaType.MULTIPART_FORM_DATA_TYPE.getSubtype().equalsIgnoreCase(mediaType.getSubtype())){
return true;
}

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Path("/postFile")
// @Produces(MediaType.TEXT_PLAIN)
// public String postFile(@FormDataParam("postFile") InputStream stream,
// @FormDataParam("postFile") FormDataContentDisposition fileDisposition){
public String postFile(FormDataMultiPart form){
// 获取表单的其他数据
FormDataBodyPart usernamePart = form.getField("username");
System.out.println("name = " + usernamePart.getName() + " ,value = " + usernamePart.getValue());

// ContentDisposition headerOfFilePart =
// filePart.getContentDisposition();
// 把表单内容转换成流
try{
// 获取文件流
FormDataBodyPart filePart = form.getField("postFile");
System.out.println("MediaType = " + filePart.getMediaType());

InputStream fileInputStream = filePart.getValueAs(InputStream.class);
int len = 1024;// fileInputStream.available();
System.out.println("len = " + len);
byte[] buff = new byte[len];
len = fileInputStream.read(buff, 0, len);
System.out.println("content = " + new String(buff, 0, len));

FormDataContentDisposition formDataContentDisposition = filePart.getFormDataContentDisposition();

String source = formDataContentDisposition.getFileName();
String result = new String(source.getBytes("ISO8859-1"), "UTF-8");

System.out.println("result = " + result);
}
catch(IOException e1){
e1.printStackTrace();
}

return "上传成功";
}

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Path("/postFile2")
@Produces(MediaType.TEXT_PLAIN)
public String postFile2(@FormDataParam("postFile") InputStream stream,
@FormDataParam("postFile") FormDataContentDisposition fileDisposition,
@FormDataParam("username") String username){
System.out.println(username);
try{
// 这里坑死人了，不能用stream.available()，为0，available不可靠
java.io.File file = new java.io.File(fileDisposition.getFileName());
FileOutputStream stream2 = new FileOutputStream(file);
int len = 1024;
System.out.println("len = " + len);
byte[] buff = new byte[len];
len = stream.read(buff, 0, len);
stream2.write(buff, 0, len);
System.out.println("content = " + new String(buff, 0, len));
stream2.close();
System.out.println("fileName = " + fileDisposition.getFileName());
}
catch(IOException e1){
e1.printStackTrace();
}

return "上传成功";
}