今天完成的事情：完成是ssm对数据库的增删改查 

        使用postman测好接口 

        使用表单实现 相关提交

       这里主要粘贴一下controller代码

// 告诉spring mvc这是一个控制器类
@Controller
public class CategoryController {
    @Autowired
    CategoryService categoryService;

    @RequestMapping("/listCategory")
    public ModelAndView listCategory() {
        ModelAndView mav = new ModelAndView();
        List<Category> cs = categoryService.list();

        // 放入转发参数
        mav.addObject("cs", cs);
        // 放入jsp路径
        mav.setViewName("listCategory");
        return mav;
    }


    @RequestMapping(value = "/a/category/all", method = RequestMethod.GET)
    public String allCategory(HttpServletRequest request, HttpServletResponse response, Model model) {
        try {

            List<Category> categoryList = categoryService.list();

            int i = categoryList.size();

            model.addAttribute("category", categoryList);
        } catch (Exception e) {
            e.printStackTrace();

            return "common/errorJson";
        }
        return "category/listJson";
    }


    @RequestMapping(value = "/a/student/select/{id}", method = RequestMethod.GET)
    public String detail(HttpServletRequest request, HttpServletResponse response, Model model, @PathVariable Integer id) {
        if (id != null) {
            try {

                Category category = this.categoryService.get(id);

                //将数据绑定到model上，可以传入jsp页面
                model.addAttribute("category", category);
            } catch (Exception e) {
                e.printStackTrace();

                return "common/errorJson";
            }
            return "category/categoryDataliJson";
        } else {

            return "common/errorParameterJson";
        }

    }


    @RequestMapping(value = "/a/student/select/{id}", method = RequestMethod.POST)
    public String detail1(HttpServletRequest request, HttpServletResponse response, Model model, Integer id) {
        if (id != null) {
            try {

                Category category = this.categoryService.get(id);

                //将数据绑定到model上，可以传入jsp页面
                model.addAttribute("category", category);
            } catch (Exception e) {
                e.printStackTrace();

                return "common/errorJson";
            }
            return "category/categoryDataliJson";
        } else {

            return "common/errorParameterJson";
        }
    }

    @RequestMapping(value = "/a/category", method = RequestMethod.POST)
    public String add(HttpServletRequest request, HttpServletResponse reponse, Model model, @ModelAttribute Category category) throws UnsupportedEncodingException {

        try {
            categoryService.add(category);
            model.addAttribute("cat", category.getName());
//                ModelAndView modelAndView=new ModelAndView();
//                modelAndView.addObject("cat",cat);
//                request.setAttribute("cat",category.getName());
        } catch (Exception e) {
            e.printStackTrace();
            return " common/errorJson";
        }

     /*   request.setCharacterEncoding("utf-8");
        reponse.setCharacterEncoding("utf8");*/
        return "common/successJson";
    }


   /* @RequestMapping(value="/a/category",method=RequestMethod.GET)
    public String add2(HttpServletRequest request, HttpServletResponse reponse, Model model,  Category category) {

        if (category.getName() != null) {
            try {
                Integer i = categoryService.add(category);
                if (i == -1) {
                    return "common/successJson";
                }
            } catch (Exception e) {
                e.printStackTrace();
                return "common/errorJson";
            }
        } else {
            return "common/errorParameterJson";
        }
        return "common/successJson";


    }*/

    @RequestMapping(value="/a/category/shancu/{id}",method = RequestMethod.GET)
public String delete(HttpServletRequest request,HttpServletResponse response,Model model,@PathVariable int id){
      try{
          int i=categoryService.delete(id);
      }catch(Exception e){
          e.printStackTrace();
          return " common/errorJson";
      }
    return "common/successJson";
}

}

逻辑还是有点混乱 还是不进行非空验证了

再把index.jsp页面展示一下

<html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8" isELIgnored="false"%>
<body>
<h2>Hello World!</h2>

<form action="/a/category/shancu/{id}" method="post">
    id:<input type="text" name="id"/>

    <br>
    <input type="submit" value="Delete"/>
    <br>
<form action="/a/category" method="post">

    name:<input type="text" name="name"/>
        <br>
    <input type="submit" value="Submit"/>
</form>

<br> <br>
<a href="/a/category/all">显示全部</a>
<%--<a href="/a/student/select/{id}">查询</a>--%>
<form action="/a/student/select/{id}" method="post">
    id:<input type="text" name="id"/>

    <br>
    <input type="submit" value="Submit"/>
</form>
<br> <br>

</body>
</html>

明天计划的事情：继续整理代码 被师兄们批评 代码不符合规范 乱用_  使用路径随意

         还是要整理知识点 学了很多也用了很多 但还是有点乱
遇到的问题：使用插入数据的方法的时候  声明的返回类型为对象 所以一直在报错

       应该改成int  返回的id不是实际的id是受影响的行数

       对象实际上是通过srrvice注入进去的 再使用requet来对它进行取值

@Service
public class CategoryServiceImpl implements CategoryService {
/*    @Autowired
    private  CategoryMapper dao;
 */
    @Resource
    private CategoryMapper dao;

    public List<Category> list(){
        List<Category> category = this.dao.list();
        return category;
    }

    public Category get(Integer id){
        Category category =  this.dao.get(id);
        return category;
    }

收获：学习了很多知识点 更详尽的使用了ModelAndView 

(HttpServletRequest request, HttpServletResponse reponse, Model model, @ModelAttribute

对jsp文件使用的也更加熟练 尤其是表单

展示一下

页面还是很low

任务进度：略微延后半天 知识点比较多急需整理

禅道链接：http://task.ptteng.com/zentao/my-task-assignedTo.html