如何使用Post Request将JSON字符串传递给Jersey Rest Web服务

I want to create a REST Jersey Web-Service accepting JSON string as input parameter.

我想创建一个REST Jersey Web服务，接受JSON字符串作为输入参数。

Also I will use post requestand from webmethod I will return one JSON string.

此外，我将使用post request和webmethod我将返回一个JSON字符串。

How can I consume this in a HTML page using Ajax post request. I want to know what all changes I need to make it on web method to accept JSON String.

如何使用Ajax post请求在HTML页面中使用它。我想知道我需要在web方法上接受JSON字符串的所有更改。

 public class Hello {

      @POST
     public String sayPlainTextHello() {
      return "Hello Jersey";
      }
   }

2 个解决方案

#1

Need to break down your requests. First, you want to accept a JSON string. So on your method you need

需要打破您的要求。首先，您想要接受JSON字符串。所以你需要的方法

@Consumes(MediaType.APPLICATION_JSON)

Next, you need to decide what you want your method to obtain. You can obtain a JSON string, as you suggest, in which case your method would look like this:

接下来，您需要确定您希望方法获得的内容。您可以按照建议获取JSON字符串，在这种情况下，您的方法如下所示：

@Consumes(MediaType.APPLICATION_JSON)
public String sayPlainTextHello(final String input) {

Or alternatively if your JSON string maps to a Java object you could take the object directly:

或者，如果您的JSON字符串映射到Java对象，您可以直接获取该对象：

@Consumes(MediaType.APPLICATION_JSON)
public String sayPlainTextHello(final MyObject input) {

You state that you want to return a JSON string. So you need:

您声明要返回JSON字符串。所以你需要：

@Produces(MediaType.APPLICATION_JSON)

And then you need to actually return a JSON string:

然后你需要实际返回一个JSON字符串：

return "{\"result\": \"Hello world\"}";

So your full method looks something like this:

所以你的完整方法看起来像这样：

@PATH("/hello")
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public String sayPlainTextHello(final String input) {
  return "{\"result\": \"Hello world\"}";
}

Regarding using AJAX to send and receive, it would look something like this:

关于使用AJAX发送和接收，它看起来像这样：

var myData="{\"name\": \"John\"}";
var request = $.ajax({
    url: "/hello",
    type: "post",
    data: myData
});

request.done(function (response, textStatus, jqXHR){
    console.log("Response from server: " + response);
});

#2

This will work. "path" is the relative URL path to be used in AJAX call.

这会奏效。 “path”是在AJAX调用中使用的相对URL路径。

public class Hello {

@POST
@Path("/path")
@Produces({ "text/html" })
 public String sayPlainTextHello() {
  return "Hello Jersey";
  }

}

#1