improve english rust docs (#1531)

content/en/docs3-v2/_index.md

@@ -0,0 +1,10 @@
+
+---
+type: docs
+title: "SDK Manual"
+linkTitle: "SDK Manual"
+hide_summary: true
+menu:
+  main:
+    weight: 21
+---

content/en/docs3-v2/rust-sdk/_index.md

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+
+---
+type: docs
+title: "Rust"
+linkTitle: "Rust"
+weight: 100
+description: "Rust SDK Manual"
+---
+

content/en/docs3-v2/rust-sdk/java-interoperability.md

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+---
+type: docs
+title: "Rust and Java interoperability"
+linkTitle: "Rust and Java interoperability"
+weight: 2
+description: "Use Dubbo-rust call Duboo Java service"
+---
+
+## 1 Prerequisite
+- Install [Rust development environment](https://rustup.rs/).
+- Install [protoc](https://grpc.io/docs/protoc-installation/).
+- Install Java development environment.
+
+## 2 Run example of Java Dubbo provider
+
+Java version of Dubbo provider example <https://github.com/apache/dubbo-samples/tree/master/dubbo-samples-triple>.
+
+Clone the source code, compile, and run provider:
+
+```sh
+$ # clone the source code
+$ git clone https://github.com/apache/dubbo-samples.git
+$ cd dubbo-samples/dubbo-samples-triple/
+
+$ # compile and build
+$ mvn clean compile package -DskipTests
+
+$ # run provider
+$ java -Dprovider.port=8888 -jar ./target/dubbo-samples-triple-1.0-SNAPSHOT.jar
+# … some logs
+Dubbo triple stub server started, port=8888
+```
+
+[The interface defination on Java side](https://github.com/apache/dubbo-samples/blob/master/dubbo-samples-triple/src/main/proto/greeter.proto)
+
+## 3 Run Rust version of  Dubbo consumer
+
+Rust version of Dubbo consumer <https://github.com/apache/dubbo-samples/tree/master/dubbo-samples-triple>.
+
+Clone the source code, compile and run consumer:
+
+```sh
+$ # clone the source code
+$ git clone https://github.com/apache/dubbo-rust.git
+$ cd dubbo-rust/examples/greeter/
+
+$ # build
+$ cargo build
+
+$ # run consumer, call provider
+$ ../../target/debug/greeter-client
+# unary call
+Response: GreeterReply { message: "hello, dubbo-rust" }
+# client stream
+client streaming, Response: GreeterReply { message: "hello client streaming" }
+# bi stream
+parts: Metadata { inner: {"content-type": "application/grpc", "date": "Wed, 28 Sep 2022 23:54:56 GMT"} }
+reply: GreeterReply { message: "server reply: \"msg1 from client\"" }
+reply: GreeterReply { message: "server reply: \"msg2 from client\"" }
+reply: GreeterReply { message: "server reply: \"msg3 from client\"" }
+trailer: Some(Metadata { inner: {"grpc-message": "poll trailer successfully.", "grpc-accept-encoding": "gzip,identity", "content-type": "application/grpc", "grpc-status": "0"} })
+# server stream
+parts: Metadata { inner: {"content-type": "application/grpc", "date": "Wed, 28 Sep 2022 23:54:56 GMT"} }
+reply: GreeterReply { message: "msg1 from server" }
+reply: GreeterReply { message: "msg2 from server" }
+reply: GreeterReply { message: "msg3 from server" }
+trailer: Some(Metadata { inner: {"content-type": "application/grpc", "grpc-message": "poll trailer successfully.", "grpc-accept-encoding": "gzip,identity", "grpc-status": "0"} })
+```
+
+[The interface defination on Rust side](https://github.com/apache/dubbo-samples/tree/master/dubbo-samples-triple)