這篇文章主要介紹了Spring Boot項目維護全局json數據代碼實例,文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下

概述

過去 我們在每一個方法中處理前端發過來的請求,需要自己構造請求數據,然后通過spring 提供的@ResponseBody 強制轉為JSON數據嗎,實際上出現了很多重復的代碼,我么亦可以通過構造一個

工具類,實現只關注需要改變的數據. 下面給出這個工具類.

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('操作失敗！'); return res; } public JsonMsg addInfo(String key, Object obj){ this.extendInfo.put(key, obj); return this; }}

下面我給出具體的使用示例:

就是一個普通的CRUD代碼

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; /** * 刪除 * @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', '刪除異常'); } return JsonMsg.success(); } /** * 部門更改 * @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', '部門更新失敗'); } return JsonMsg.success(); } /** * 新增部門 * @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', '添加異常！'); } return JsonMsg.success(); } /** * 查詢部門信息總頁碼數 * @return */ @RequestMapping(value = '/getTotalPages', method = RequestMethod.GET) @ResponseBody public JsonMsg getTotalPages(){ //每頁顯示的記錄行數 int limit = 5; //總記錄數 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', '無部門信息'); } /** * 分頁查詢：返回指定頁數對應的數據 * @param pageNo * @return */ @RequestMapping(value = '/getDeptList', method = RequestMethod.GET) public ModelAndView getDeptList(@RequestParam(value = 'pageNo', defaultValue = '1') Integer pageNo){ ModelAndView mv = new ModelAndView('departmentPage'); //每頁顯示的記錄行數 int limit = 5; //總記錄數 int totalItems = departmentService.getDeptCount(); int temp = totalItems / limit; int totalPages = (totalItems % limit== 0) ? temp : temp+1; //每頁的起始行(offset+1)數據，如第一頁(offset=0，從第1(offset+1)行數據開始) 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; } /** * 查詢所有部門名稱 * @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(); }}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。