pom.xml添加依赖

net.sourceforge.plantuml

plantuml

1.2020.10

对应controller写入plantuml脚本

package com.imddysc.testweb.controller;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import org.springframework.http.MediaType;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.bind.annotation.RestController;

import net.sourceforge.plantuml.FileFormat;

import net.sourceforge.plantuml.FileFormatOption;

import net.sourceforge.plantuml.SourceStringReader;

@RestController

public class PlantUMLServerController {

@ResponseBody

@RequestMapping(value = "/ping", method = RequestMethod.GET)

public String ping() throws IOException {

System.out.println("Ping");

return "OK!";

}

@ResponseBody

@RequestMapping(value = "/uml", method = RequestMethod.GET, produces = MediaType.IMAGE_PNG_VALUE)

public byte[] generateImageFromUmlScript(@RequestParam(value = "script", defaultValue = "@startuml;actor Kaka;@enduml") String script) throws IOException {

System.out.println("Generate UML for: "+script);

SourceStringReader reader = new SourceStringReader(script.replace(';','\n'));

ByteArrayOutputStream bos = new ByteArrayOutputStream();

reader.generateImage(bos, new FileFormatOption(FileFormat.PNG, false));

return bos.toByteArray();

}

}

二、

服务器需要安装 curl  graphviz 等。

yum install -y curl curl-devel graphviz graphviz-devel

@startuml

!include

!include

!include

!include

title Cloudinsight sprites example

skinparam monochrome true

rectangle "\nwebapp" as webapp

queue "" as kafka

rectangle "\ndaemon" as daemon

database "" as cassandra

webapp -> kafka

kafka -> daemon

daemon --> cassandra

@enduml