SpringBoot入门十五,添加Activiti5.22工作流在线编辑器

在线编辑器可以直接参考，springMVC集成activiti-explorer5.22(一)中的第2、3、4步,以及springMVC集成activiti-explorer5.22(二)的配置，基本整合基本完成，这里来着重说一下在springboot中需要修改的地方.

1.修改ModelSaveRestResource.java类

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
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.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

@RestController
@RequestMapping(value = "/service")
public class ModelSaveRestResource implements ModelDataJsonConstants {

    private static final Logger LOGGER = LogManager.getLogger(ModelSaveRestResource.class);

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private ObjectMapper objectMapper;

    @RequestMapping(value = "/model/{modelId}/save", method = RequestMethod.PUT)
    @ResponseStatus(value = HttpStatus.OK)
    public void saveModel(@PathVariable String modelId, @RequestParam("name") String name,
            @RequestParam("json_xml") String json_xml, @RequestParam("svg_xml") String svg_xml,
            @RequestParam("description") String description) {
        try {
            Model model = repositoryService.getModel(modelId);
            ObjectNode modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo());

            modelJson.put(MODEL_NAME, name);
            modelJson.put(MODEL_DESCRIPTION, description);
            model.setMetaInfo(modelJson.toString());
            model.setName(name);

            repositoryService.saveModel(model);
            repositoryService.addModelEditorSource(model.getId(),json_xml.getBytes("utf-8"));

            InputStream svgStream = new ByteArrayInputStream(svg_xml.getBytes("utf-8"));
            TranscoderInput input = new TranscoderInput(svgStream);

            PNGTranscoder transcoder = new PNGTranscoder();
            // Setup output
            ByteArrayOutputStream outStream = new ByteArrayOutputStream();
            TranscoderOutput output = new TranscoderOutput(outStream);

            // Do the transformation
            transcoder.transcode(input, output);
            final byte[] result = outStream.toByteArray();
            repositoryService.addModelEditorSourceExtra(model.getId(), result);
            outStream.close();
        } catch (Exception e) {
            LOGGER.error("Error saving model", e);
            throw new ActivitiException("Error saving model", e);
        }
    }
}

2.修改stencilset.json文件的获取位置

由于在Springboot中静态文件都是放在resources/static中的，因此也需要修改StencilsetRestResource.java中获取文件的位置,如下即可

InputStream stencilsetStream = getClass().getClassLoader().getResourceAsStream("static/activiti/stencilset.json");

3.解决流程图中文保存乱码的问题

新建一个CustomActivitiConfig.java的配置类即可,代码如下

import org.activiti.spring.SpringProcessEngineConfiguration;
import org.activiti.spring.boot.ProcessEngineConfigurationConfigurer;
import org.springframework.stereotype.Component;

@Component
public class CustomActivitiConfig implements ProcessEngineConfigurationConfigurer {

    /**
     * Overriding
     * <h5>功能:设置流程图中中文字体,防止流程图显示乱码</h5> 
     * @param processEngineConfiguration
     */
    @Override
    public void configure(SpringProcessEngineConfiguration processEngineConfiguration) {
        processEngineConfiguration.setActivityFontName("宋体");
        processEngineConfiguration.setLabelFontName("宋体");
        processEngineConfiguration.setAnnotationFontName("宋体");
    }
}

至此,整合结束