关于前端:使用springBoot实现服务端XML文件的前端读写

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简介

通常咱们批改某个服务的配置文件的时候，须要登入服务器，进入指定目录而后对配置文件例如 xml 进行批改，偶然一次操作还能够，然而频繁操作的确有点麻烦。
所以咱们间接把这项性能放到前端界面来进行操作, 来晋升运维的效率。

思路

  1. 后端通过 I / O 来将服务端 XML 文件读取并发送给前端
  2. 前端把接管回来的 xml 文件在前端 web 编辑器里进行渲染
  3. 前端把批改过的 xml 文件再次发送给后端
  4. 后端把接管回来的 xml 写回服务端配置文件

依赖

1.springBoot
2.dom4j(xml 读写库）
3.vue-element-admin
4.ace.js(web 编辑器)

实现

后端

导入依赖

<dependency>
    <groupId>dom4j</groupId>
    <artifactId>dom4j</artifactId>
    <version>1.6.1</version>
</dependency>

在 resources 目录下新建hdfs-site.xml, 并写入如下内容进行测试

测试 demo 中门路为写死的，后续可改为动静配置即可

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration> 
  <!-- 指定 HDFS 正本的数量 -->  
  <property> 
    <name>dfs.replication</name>  
    <value>1.2</value> 
  </property>  
  <!-- 指定 Hadoop 辅助名称节点主机配置 -->  
  <property> 
    <name>dfs.namenode.secondary.http-address</name>  
    <value>java151:50090</value> 
  </property>  
  <property> 
    <name>dfs.webhdfs.enabled</name>  
    <value>true</value> 
  </property> 
</configuration>

新建 XmlUtil 工具类

import org.dom4j.*;
import org.dom4j.io.*;
import java.io.*;

public class XmlUtil {
    /**
     * 获取 xml 文档
     */
    public static Document getDocument(String filename) {File xmlFile = new File(filename);
        Document document = null;
        if (xmlFile.exists()) {
            try {SAXReader saxReader = new SAXReader();
                document = saxReader.read(xmlFile);
            } catch (Exception e) {e.printStackTrace();
            }
        }
        return document;
    }

    /**
     * 写入 xml 节点，没有就新建，存在就笼罩
     */
    public static void coverElement(String filePath, Document document) throws Exception {if (document != null) {OutputFormat format = OutputFormat.createPrettyPrint();
            File xmlFile = new File(filePath);
            format.setEncoding("UTF-8");
            XMLWriter writer = new XMLWriter(new FileOutputStream(xmlFile), format);
            writer.write(document);
            writer.close();}
    }
}

新建 getXmlFile 接口, 借助 dom4j 的asXML()将 xml 以 字符串 模式返回给前端,Result类自行依据我的项目返回需要实现即可

@ApiOperation(value = "获取 xml 文件", notes = "获取 xml 文件")
@GetMapping(value = "/getXmlFile")
public Object getXmlFile(HttpServletRequest request, HttpServletResponse response) throws Exception {
    String filePath = "src/main/resources/hdfs-site.xml";
    Document document = XmlUtil.getDocument(filePath);
    String docXmlText = document.asXML();// 输入 xml 字符串
    return new Result(true, 20000, "获取 hdfs-site.xml 胜利", docXmlText);
}

新建 putXmlFile 接口，借助 DocumentHelper.parseText 将前端返回的字符串转为xml

@ApiOperation(value = "批改 xml 文件", notes = "批改 xml 文件")
@ResponseBody()
@PostMapping(value = "/putXmlFile")
public Object putXmlFile(@RequestBody XmlDO body, HttpServletResponse response) throws Exception {Document document = DocumentHelper.parseText(body.getData());// 字符串转 xml
    String filePath = "src/main/resources/hdfs-site.xml";
    XmlUtil.coverElement(filePath, document);
    return new Result(true, 20000, "批改 hdfs-site.xml 胜利", body.getData());
}

XmlDO

import lombok.Data;
@Data
public class XmlDO {
    private String type;
    private String data;
}

前端

插件依赖

"xml-formatter": "^2.4.0"
"lodash": "^4.17.20",

在 api 目录下新建 xml.js 接口,url 依据本人的理论状况批改即可

import request from '@/utils/request'

export function getXmlFile() {
  return request({
    url: '/api/test/getXmlFile',
    method: 'get'
  })
}
export function putXmlFile(data) {
  return request({
    url: '/api/test/putXmlFile',
    method: 'post',
    data
  })
}

导入 ace.js，包含主题以及语言
public/index.html 写入

//css
<link rel="stylesheet" href="https://cdn.bootcdn.net/ajax/libs/ace/1.4.9/theme-xcode.css">
//js
<script src="https://cdn.bootcdn.net/ajax/libs/ace/1.4.9/ace.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/ace/1.4.9/ext-beautify.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/ace/1.4.9/ext-language_tools.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/ace/1.4.9/theme-xcode.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/ace/1.4.9/mode-xml.js"></script>

新建编辑器组件 src/components/codeEditor/index.vue, lodash 依赖自行isntall

<template>
  <div :id="Id" ref="editor" :style="{'max-height': height}" class="ace-editor" />
</template>

<script>
import uniqueId from 'lodash/uniqueId'
export default {
  name: 'AceEditor',
  props: {
    value: {
      type: String,
      default: ''
    },
    height: {
      type: String,
      default: '300px'
    },
    readOnly: {
      type: Boolean,
      default: false
    },
    mode: {
      type: String,
      default: 'json'
    }
  },
  data() {
    this.editor = null
    this.Id = uniqueId('aceEditor')
    return {annot: []
    }
  },
  computed: {
    code: {
      // 数据更新告诉父组件更新数据
      set(val) {this.$emit('input', val)
      },
      get() {return this.value}
    }
  },
  watch: {code() {
      // 父组件中数据变动，同步到 ace Editor
      // aceEditor.setValue 调用后默认会全选所有文本内容，须要对光标进行非凡解决
      // 缓存光标地位
      const position = this.editor.getCursorPosition()
      this.syncData()
      this.editor.clearSelection()
      this.editor.moveCursorToPosition(position)
    },
    mode(mode) {this.changeMode(mode)
    },
    readOnly(b) {this.setReadOnly(b)
    }
  },
  mounted() {this.initEditor()
  },
  methods: {initEditor() {
      // eslint-disable-next-line no-undef
      this.editor = ace.edit(this.Id)
      this.editor.setTheme('ace/theme/xcode')
      // 编辑时同步数据
      this.editor.session.on('change', () => {this.code = this.editor.getValue()
      })
      this.editor.getSession().on('changeAnnotation', () => {this.annot = this.editor.getSession().getAnnotations()
        this.$emit('annot', this.annot)
        for (var key in this.annot) {
          // eslint-disable-next-line no-prototype-builtins
          if (this.annot.hasOwnProperty(key)) {console.log(this.annot[key].text + 'on line' + ' ' + this.annot[key].row) }
        }
      })
      // 字体大小
      this.editor.setFontSize(14)
      this.syncData()
      this.syncOptions()},

    changeMode(modeName) {
      const mode = {
        yaml: 'ace/mode/yaml',
        json: 'ace/mode/json',
        xml: 'ace/mode/xml',
        javascript: 'ace/mode/javascript'
      }
      this.editor.session.setMode(mode[modeName])
    },
    setReadOnly(readOnly) {this.editor.setReadOnly(readOnly)
    },
    syncOptions() {this.setReadOnly(this.readOnly)
      this.changeMode(this.mode)
    },
    syncData() {this.editor.setValue(this.code)
    }
  }
}
</script>

<style scoped>
.ace-editor {
  position: relative;
  height: 800px;
  border: 1px solid #ccc;
  border-radius: 2px;
}
.ace-editor /deep/ .ace_print-margin {display: none;}
</style>

新建页面src/views/xmlTest/index.vue

<template>
  <div id="contain">
    <div>
      <div id="select">
        <h3> 批改配置文件(xml)</h3>
        <el-button type="primary" @click="testApi"> 批改 </el-button>
      </div>
      <aceEditor
        v-model="resquestCode"
        height="800px"
        mode="xml"
        @annot="annot"
      />
    </div>
  </div>
</template>

<script>
import {getXmlFile, putXmlFile} from '@/api/xml'
import aceEditor from '@/components/codeEditor'
export default {
  name: '',
  components: {aceEditor},
  props: {},
  data() {
    return {errcode: [],
      resquestCode: ``
    }
  },
  watch: { },
  mounted() {this.getXml()
  },
  methods: {isError() {if (this.errcode.length > 0) {this.$message.error(` 代码第 ${this.errcode[0].row + 1}行语法错误，${this.errcode[0].text}`)
        return true
      }
      return false
    },
    testApi() {if (!this.isError()) {this.format()
        this.select()}
    },
    getXml() {getXmlFile().then(res => {console.log('res:', res)
        this.resquestCode = res.data || ''
        this.format()})
    },
    annot(e) {this.errcode = e},
    format() {var format = require('xml-formatter')
      this.resquestCode = format(this.resquestCode, {collapseContent: true})
    },
    select() {putXmlFile({ data: this.resquestCode}).then(res => {console.log('res:', res)
        this.$message.success('批改胜利')
      })
    }
  }
}
</script>

<style lang="scss">
#contain {
  margin: 0 20px;
  display: block !important;
  #select {
    .el-select .el-input {width: 100px;}
    .input-with-select .el-input-group__prepend {background-color: #fff;}
  }
}
#editor {
  width: 100%;
  height: 300px;
}
</style>

增加路由配置

  {
    path: '/xml',
    component: Layout,
    children: [
      {
        path: '',
        name: 'xml',
        component: () => import('@/views/xmlTest/index'),
        meta: {title: 'xml', icon: 'xml'}
      }
    ]
  }

界面

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前端
发表至： 前端
2021-06-23
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