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

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