vue+Java 文件下载

背景

算是第一次，前后端自己琢磨文件下载了。直接上代码吧。

前端代码

<template>
  <div>
    <!-- 列表 -->
    <el-row>
      <el-table :data="docs" ref="docs" style="width: 100%" stripe @sort-change="sort" v-loading="loading">
        <el-table-column prop="docFileName" :label="$t('gts.doc.fileName')" sortable align="center" min-width="10%"></el-table-column>
        <el-table-column prop="id" align="center" min-width="20%">
          <template slot-scope="scope">
            <a @click="download(scope.$index, scope.row)">
              <i class="fas fa-download" style="color:#409EFF"></i>
            </a>
          </template>
        </el-table-column>
      </el-table>
      <div class="pagination">
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handlePageChange"
          :current-page="page"
          :page-size="limit"
          :total="total"
          :page-sizes="[10, 20, 50, 100]"
          layout="total, sizes, prev, pager, next, jumper"
          :background="true"
        ></el-pagination>
      </div>
    </el-row>
  </div>
</template>

<script>
import { list } from "@/api/gts/document";
import { selectDict } from "@/api/common";
import { cst } from "@/utils/constants";

export default {
  name: "GtsDocument",
  data() {
    return {
      limitNum: 1,
      fileList: [],
      docs: [],
      loading: false,
      page: 1,
      limit: 10,
      total: 0,
    };
  },
  created: function() {
    this.search();
  },
  methods: {
    search() {
      list(this.page, this.limit, this.$route.query.gtsId).then(v => {
        if ("ok" == v.data.msg) {
          this.docs = v.data.rows;
          this.total = v.data.total;
        }
      });
    },
    // 下载事件
    download(index, row) {
      var path = row.docPath + row.docFileName;
      // path例如：D:\home\upload\da975319173641669a6fca212ffd272e\夕阳.jpg
      window.open("http://localhost:8080/api/documents/download?path=" + encodeURI(path));
    },
    sort() {},
    handlePageChange(i) {
      this.page = i;
      this.search();
    },
    handleSizeChange(i) {
      this.limit = i;
      this.search();
    },
  }
};
</script>

后台controller

    /**
     * <p>Description: 下载</p>
     *
     * @param path     路径
     * @param response
     */
    @GetMapping("/api/documents/download")
    public void download(String path, HttpServletResponse response) {
        try {
            // path： 欲下载的文件的路径
            File file = new File(path);
            // 获取文件名 - 设置字符集            String downloadFileName = new String(file.getName().getBytes(StandardCharsets.UTF_8), "iso-8859-1");
            // 以流的形式下载文件
            InputStream fis;
            fis = new BufferedInputStream(new FileInputStream(path));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            // 清空response
            response.reset();
            // 设置response的Header
            response.addHeader("Content-Disposition", "attachment;filename=" + downloadFileName);
            response.addHeader("Content-Length", "" + file.length());
            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
            response.setContentType("application/octet-stream");
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

页面效果