@Select模糊查询已解决，增加SearchController

demo/src/main/java/com/example/demo/Dao/productMapper.java

@@ -7,7 +7,7 @@ import java.util.List;
 
 @Mapper
 public interface productMapper {
-    @Select("select * from product where productName like '%${productName}%'")
+    @Select("select * from product where productName like CONCAT('%',#{0},'%')")
     public List<Product> findByNameLike(String productName);
 
     @Select("select * from product where productName = #{category}")

demo/src/main/java/com/example/demo/searchService/controller/SearchController.java

@@ -0,0 +1,61 @@
+package com.example.demo.searchService.controller;
+
+import com.example.demo.bean.Product;
+import com.example.demo.searchService.service.ProductSearchService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+@RestController
+@RequestMapping("/search")
+public class SearchController {
+    @Autowired
+    private ProductSearchService productSearchService;
+
+    //按关键字搜索
+    @RequestMapping(value = "/key",method = RequestMethod.POST)
+    public List<Product> searchByKey(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
+        response.setContentType("text/html;charset=utf-8");
+        List<Product> list = new ArrayList<Product>();
+        String productName = request.getParameter("productName");
+        list = productSearchService.findByNameLike(productName);
+        return list;
+    }
+
+    //按产品类别搜索
+    @RequestMapping(value = "/category",method = RequestMethod.POST)
+    public List<Product> searchByCategory(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
+        response.setContentType("text/html;charset=utf-8");
+        List<Product> list = new ArrayList<Product>();
+        String category = request.getParameter("category");
+        list = productSearchService.findByCategory(category);
+        return list;
+    }
+
+    //按利率排序由低到高
+    @RequestMapping(value = "/intrate",method = RequestMethod.POST)
+    public List<Product> searchByIntrate(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
+        response.setContentType("text/html;charset=utf-8");
+        List<Product> list = new ArrayList<Product>();
+        Float intrate = Float.parseFloat(request.getParameter("intrate"));
+        list = productSearchService.findByIntrate(intrate);
+        return list;
+    }
+
+    //按产品使用的产品的数量由高到低排序
+    @RequestMapping(value = "/count",method = RequestMethod.POST)
+    public List<Product> searchByCount(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
+        response.setContentType("text/html;charset=utf-8");
+        List<Product> list = new ArrayList<Product>();
+        list = productSearchService.findByCount();
+        return list;
+    }
+}