整体难度一般，但是小点儿比较多，综合性强。
例如我用axios像后端发送post时候，很容易忽略格式。
前后端数据交互时候，能传大就传大，数据越完整，数据表现越强
拿到后端数据时候，拆包层级要分清。
Vue.js
<script>
let app = new Vue({
el:"#app",
data:{
currentPage:1, //当前页
pageSize:10, //每页显示条数
total:0, //总记录数;
list:[],//当前页数据
//绑定学生信息
student:{
name:"",
age:""
}
},
methods:{
pager:function(num){
this.currentPage = num;
this.getData();
},
getData:function () {
axios.post("/StudentManager/showAllServlet?currentPage=" + this.currentPage + "&pageSize=" + this.pageSize).then((resp) => {
this.list = resp.data.datas;
this.total = resp.data.total;
});
},
add:function () {
if (this.student.id === undefined) {
axios.post("/StudentManager/addStudentServlet", this.student).then((resp) =>{
if (resp.data.flag){
this.getData();
}else {
alert("添加失败!");
}
});
}else {
axios.post("/StudentManager/updateStudentServlet", this.student).then((resp)=>{
if (resp.data.flag){
this.getData();
}else {
alert("修改失败!");
}
});
}
},
deleteStudent:function (id) {
axios.post("/StudentManager/deleteStudentServlet?id="+id).then((resp)=>{
if (resp.data.flag){
this.getData();
}else {
alert("删除失败!");
}
});
},
findById:function (id) {
axios.post("/StudentManager/findByIdStudentServlet?id=" + id).then((resp)=>{
this.student = resp.data;
});
}
},
mounted:function () {
this.getData();
}
});
</script>
显示分页学生信息
// Servlet
String currentPage = request.getParameter("currentPage");
String pageSize = request.getParameter("pageSize");
PageBean<Student> pageBean = showAllStudentService.showAllStudent(Integer.parseInt(currentPage), Integer.parseInt(pageSize));
ObjectMapper objectMapper = new ObjectMapper();
String json = objectMapper.writeValueAsString(pageBean);
response.getWriter().write(json);
// Service
@Test
@Override
public PageBean<Student> showAllStudent(int currentPage, int pageSize) {
PageHelper.startPage(currentPage, pageSize);
SqlSession sqlSession = SqlSessionUtils.getSqlSession(false);
StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
List<Student> students = mapper.showStudent();
PageInfo<Student> pageInfo = new PageInfo<>(students);
long total = pageInfo.getTotal();
int pages = pageInfo.getPages();
PageBean<Student> pageBean = new PageBean<>(total, students, pages);
sqlSession.close();
return pageBean;
}
// Dao
/**
* 首页显示所有学生
* @return 学生列表
*/
@Select("SELECT * FROM student")
List<Student> showStudent();
