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Spring Boot项目中怎么维护全局json数据,很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
工具类.
public class JsonMsg { private int code; private String msg; private Map<String, Object> extendInfo = new HashMap<>(); public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public Map<String, Object> getExtendInfo() { return extendInfo; } public void setExtendInfo(Map<String, Object> extendInfo) { this.extendInfo = extendInfo; } public static JsonMsg success(){ JsonMsg res = new JsonMsg(); res.setCode(100); res.setMsg("操作成功!"); return res; } public static JsonMsg fail(){ JsonMsg res = new JsonMsg(); res.setCode(200); res.setMsg("操作失败!"); return res; } public JsonMsg addInfo(String key, Object obj){ this.extendInfo.put(key, obj); return this; } }
下面我给出具体的使用示例:
就是一个普通的CRUD代码
package com.hrms.controller; import com.hrms.bean.Department; import com.hrms.service.DepartmentService; import com.hrms.util.JsonMsg; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.*; import org.springframework.web.servlet.ModelAndView; import java.util.List; /** * @author GenshenWang.nomico * @date 2018/3/8. */ @Controller @RequestMapping(value = "/hrms/dept") public class DepartmentController { @Autowired DepartmentService departmentService; /** * 删除 * @param deptId * @return */ @RequestMapping(value = "/delDept/{deptId}", method = RequestMethod.DELETE) @ResponseBody public JsonMsg deleteDept(@PathVariable("deptId") Integer deptId){ int res = 0; if (deptId > 0){ res = departmentService.deleteDeptById(deptId); } if (res != 1){ return JsonMsg.fail().addInfo("del_dept_error", "删除异常"); } return JsonMsg.success(); } /** * 部门更改 * @param deptId * @param department * @return */ @RequestMapping(value = "/updateDept/{deptId}", method = RequestMethod.PUT) @ResponseBody public JsonMsg updateDeptById(@PathVariable("deptId") Integer deptId, Department department){ int res = 0; if (deptId > 0){ res = departmentService.updateDeptById(deptId, department); } if (res != 1){ return JsonMsg.fail().addInfo("update_dept_error", "部门更新失败"); } return JsonMsg.success(); } /** * 新增部门 * @param department * @return */ @RequestMapping(value = "/addDept", method = RequestMethod.PUT) @ResponseBody public JsonMsg addDept(Department department){ int res = departmentService.addDept(department); if (res != 1){ return JsonMsg.fail().addInfo("add_dept_error", "添加异常!"); } return JsonMsg.success(); } /** * 查询部门信息总页码数 * @return */ @RequestMapping(value = "/getTotalPages", method = RequestMethod.GET) @ResponseBody public JsonMsg getTotalPages(){ //每页显示的记录行数 int limit = 5; //总记录数 int totalItems = departmentService.getDeptCount(); int temp = totalItems / limit; int totalPages = (totalItems % limit== 0) ? temp : temp+1; return JsonMsg.success().addInfo("totalPages", totalPages); } /** * */ @RequestMapping(value = "/getDeptById/{deptId}", method = RequestMethod.GET) @ResponseBody public JsonMsg getDeptById(@PathVariable("deptId") Integer deptId){ Department department = null; if (deptId > 0){ department = departmentService.getDeptById(deptId); } if (department != null){ return JsonMsg.success().addInfo("department", department); } return JsonMsg.fail().addInfo("get_dept_error", "无部门信息"); } /** * 分页查询:返回指定页数对应的数据 * @param pageNo * @return */ @RequestMapping(value = "/getDeptList", method = RequestMethod.GET) public ModelAndView getDeptList(@RequestParam(value = "pageNo", defaultValue = "1") Integer pageNo){ ModelAndView mv = new ModelAndView("departmentPage"); //每页显示的记录行数 int limit = 5; //总记录数 int totalItems = departmentService.getDeptCount(); int temp = totalItems / limit; int totalPages = (totalItems % limit== 0) ? temp : temp+1; //每页的起始行(offset+1)数据,如第一页(offset=0,从第1(offset+1)行数据开始) int offset = (pageNo - 1)*limit; List<Department> departments = departmentService.getDeptList(offset, limit); mv.addObject("departments", departments) .addObject("totalItems", totalItems) .addObject("totalPages", totalPages) .addObject("curPageNo", pageNo); return mv; } /** * 查询所有部门名称 * @return */ @RequestMapping(value = "/getDeptName", method = RequestMethod.GET) @ResponseBody public JsonMsg getDeptName(){ List<Department> departmentList = departmentService.getDeptName(); if (departmentList != null){ return JsonMsg.success().addInfo("departmentList", departmentList); } return JsonMsg.fail(); } }
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