Centos安装Redis的所有材料，高级篇

package com.heima.item.web; import com.baomidou.mybatisplus.extension.plugins.pagination.Page; import com.heima.item.pojo.Item; import com.heima.item.pojo.ItemStock; import com.heima.item.pojo.PageDTO; import com.heima.item.service.IItemService; import com.heima.item.service.IItemStockService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.List; import java.util.stream.Collectors; @RestController @RequestMapping("item") public class ItemController { @Autowired private IItemService itemService; @Autowired private IItemStockService stockService; @GetMapping("list") public PageDTO queryItemPage( @RequestParam(value = "page", defaultValue = "1") Integer page, @RequestParam(value = "size", defaultValue = "5") Integer size){ // 分页查询商品 Page<Item> result = itemService.query() .ne("status", 3) .page(new Page<>(page, size)); // 查询库存 List<Item> list = result.getRecords().stream().peek(item -> { ItemStock stock = stockService.getById(item.getId()); item.setStock(stock.getStock()); item.setSold(stock.getSold()); }).collect(Collectors.toList()); // 封装返回 return new PageDTO(result.getTotal(), list); } @PostMapping public void saveItem(@RequestBody Item item){ itemService.saveItem(item); } @PutMapping public void updateItem(@RequestBody Item item) { itemService.updateById(item); } @PutMapping("stock") public void updateStock(@RequestBody ItemStock itemStock){ stockService.updateById(itemStock); } @DeleteMapping("/{id}") public void deleteById(@PathVariable("id") Long id){ itemService.update().set("status", 3).eq("id", id).update(); } @GetMapping("/{id}") public Item findById(@PathVariable("id") Long id){ return itemService.query() .ne("status", 3).eq("id", id) .one(); } @GetMapping("/stock/{id}") public ItemStock findStockById(@PathVariable("id") Long id){ return stockService.getById(id); } }