package com.ischoolbar.programmer.controller; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import org.apache.commons.lang.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import com.ischoolbar.programmer.entity.Clazz; import com.ischoolbar.programmer.entity.Grade; import com.ischoolbar.programmer.page.Page; import com.ischoolbar.programmer.service.ClazzService; import com.ischoolbar.programmer.service.GradeService; import com.ischoolbar.programmer.util.StringUtil; /** * 班级信息管理 * @author llq * */ @RequestMapping("/clazz") @Controller public class ClazzController { @Autowired private GradeService gradeService; @Autowired private ClazzService clazzService; /** * 班级列表页 * @param model * @return */ @RequestMapping(value="/list",method=RequestMethod.GET) public ModelAndView list(ModelAndView model){ model.setViewName("clazz/clazz_list"); List<Grade> findAll = gradeService.findAll(); model.addObject("gradeList",findAll ); model.addObject("gradeListJson",JSONArray.fromObject(findAll)); return model; }给这段代码加上注释

//导入所需的类
package com.ischoolbar.programmer.controller;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import com.ischoolbar.programmer.entity.Clazz;
import com.ischoolbar.programmer.entity.Grade;
import com.ischoolbar.programmer.page.Page;
import com.ischoolbar.programmer.service.ClazzService;
import com.ischoolbar.programmer.service.GradeService;
import com.ischoolbar.programmer.util.StringUtil;

/**
 * 班级信息管理
 * @author llq
 */
@RequestMapping("/clazz")
@Controller
public class ClazzController {
    //自动注入GradeService和ClazzService
    @Autowired
    private GradeService gradeService;
    @Autowired
    private ClazzService clazzService;
    
    /**
     * 班级列表页
     * @param model
     * @return
     */
    @RequestMapping(value="/list",method=RequestMethod.GET)
    public ModelAndView list(ModelAndView model){
        //设置视图的名称
        model.setViewName("clazz/clazz_list");
        //获取所有年级的列表
        List<Grade> findAll = gradeService.findAll();
        //将年级列表放入ModelAndView中
        model.addObject("gradeList",findAll );
        //将年级列表转换为JSON格式，并放入ModelAndView中
        model.addObject("gradeListJson",JSONArray.fromObject(findAll));
        return model;
    }
}