Spring Boot项目维护全局json数据代码实例

这篇文章主要介绍了Spring Boot项目维护全局json数据代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

概述

过去 我们在每一个方法中处理前端发过来的请求,需要自己构造请求数据,然后通过spring 提供的@ResponseBody 强制转为JSON数据吗,实际上出现了很多重复的代码,我么亦可以通过构造一个

工具类,实现只关注需要改变的数据. 下面给出这个工具类.

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();
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。