Spring MVC框架：第七章：REST架构风格

于 2024-06-21 01:20:11 发布
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文章标签： spring mvc 架构
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HiddenHttpMethodFilter

/*

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns=“http://www.springframework.org/schema/beans”

xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”

xmlns:context=“http://www.springframework.org/schema/context”

xmlns:mvc=“http://www.springframework.org/schema/mvc”

xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd

http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

<context:component-scan base-package=“com.*” />

<bean id=“viewResolver”

class=“org.springframework.web.servlet.view.InternalResourceViewResolver”>

mvc:annotation-driven</mvc:annotation-driven>

<mvc:default-servlet-handler />

index.jsp

<%@ page language=“java” contentType=“text/html; charset=UTF-8”

pageEncoding=“UTF-8”%>

Insert title here

去list页面

dataList.jsp

<%@ page language=“java” contentType=“text/html; charset=UTF-8”

pageEncoding=“UTF-8”%>

<%@ taglib uri=“http://java.sun.com/jsp/jstl/core” prefix=“c”%>

Insert title here

<c:if test=“${empty requestScope.list }”>

没有查询到数据

</c:if>

<c:if test=“${!empty requestScope.list }”>

ID 姓名 SSN 部门名称 操作

<c:forEach items=“${requestScope.list }” var=“list”>

${list.empId} ${list.empName} ${list.ssn } ${list.department.deptName } 删除 编辑

</c:forEach>

</c:if>

添加

dataEdit.jsp

<%@ page language=“java” contentType=“text/html; charset=UTF-8”

pageEncoding=“UTF-8”%>

<%@ taglib uri=“http://java.sun.com/jsp/jstl/core” prefix=“c”%>

Insert title here

method=“post”>

姓名 SSN 所在部门

<c:if test=“${!empty deptList }”>

<c:forEach items=“${requestScope.deptList}” var=“dept”>

<c:if test=“${dept.deptId==requestScope.emdit.department.deptId }”>

${dept.deptName }

</c:if>

${dept.deptName }

</c:forEach>

</c:if>

dataAdd.jsp

<%@ page language=“java” contentType=“text/html; charset=UTF-8”

pageEncoding=“UTF-8”%>

<%@ taglib uri=“http://java.sun.com/jsp/jstl/core” prefix=“c”%>

Insert title here
姓名 SSN 所在部门

<c:if test=“${empty deptList }”>

部门数据查询失败！！！

</c:if>

<c:if test=“${!empty deptList }”>

<c:forEach items=“${requestScope.deptList}” var=“dept”>

${dept.deptName }

</c:forEach>

</c:if>

DeptDao.java

package com.dao;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.UUID;

import org.springframework.stereotype.Repository;

import com.pojo.Department;

@Repository

public class DeptDao {

private static Map<String, Department> dataMap;

private static Map<String, Department> namedMap;

static {

dataMap = new HashMap<>();

namedMap = new HashMap<>();

Department department = new Department(UUID.randomUUID().toString(), “市场部”);

dataMap.put(department.getDeptId(), department);

namedMap.put(department.getDeptName(), department);

department = new Department(UUID.randomUUID().toString(), “销售部”);

dataMap.put(department.getDeptId(), department);

namedMap.put(department.getDeptName(), department);

department = new Department(UUID.randomUUID().toString(), “行政部”);

dataMap.put(department.getDeptId(), department);

namedMap.put(department.getDeptName(), department);

department = new Department(UUID.randomUUID().toString(), “人事部”);

dataMap.put(department.getDeptId(), department);

namedMap.put(department.getDeptName(), department);

department = new Department(UUID.randomUUID().toString(), “技术部”);

dataMap.put(department.getDeptId(), department);

namedMap.put(department.getDeptName(), department);

department = new Department(UUID.randomUUID().toString(), “公关部”);

dataMap.put(department.getDeptId(), department);

namedMap.put(department.getDeptName(), department);

}

public static Department getDeptByName(String deptName) {

return namedMap.get(deptName);

}

public static Department getDeptById(String uuid) {

return dataMap.get(uuid);

}

public List getDeptList() {

return new ArrayList<>(dataMap.values());

}

}

EmpDao.java

package com.dao;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.UUID;

import org.springframework.stereotype.Repository;

import com.pojo.Department;

import com.pojo.Employee;

@Repository

public class EmpDao {

private static Map<String, Employee> dataMap;

static {

dataMap = new HashMap<>();

String empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “乔峰”, “SSN001”, DeptDao.getDeptByName(“市场部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “虚竹”, “SSN002”, DeptDao.getDeptByName(“市场部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “段誉”, “SSN003”, DeptDao.getDeptByName(“市场部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “鸠摩智”, “SSN004”, DeptDao.getDeptByName(“技术部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “萧远山”, “SSN005”, DeptDao.getDeptByName(“技术部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “慕容复”, “SSN006”, DeptDao.getDeptByName(“技术部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “段正淳”, “SSN007”, DeptDao.getDeptByName(“公关部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “段延庆”, “SSN008”, DeptDao.getDeptByName(“公关部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “丁春秋”, “SSN009”, DeptDao.getDeptByName(“销售部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “无崖子”, “SSN010”, DeptDao.getDeptByName(“人事部”)));

empId = UUID.randomUUID().toString();

dataMap.put(empId, new Employee(empId, “慕容博”, “SSN011”, DeptDao.getDeptByName(“人事部”)));

}

public void saveEmp(Employee employee) {

String empId = UUID.randomUUID().toString();

employee.setEmpId(empId);

String deptId = employee.getDepartment().getDeptId();

Department department = DeptDao.getDeptById(deptId);

employee.setDepartment(department);

dataMap.put(empId, employee);

}

public void removeEmp(String empId) {

dataMap.remove(empId);

}

public void updateEmp(Employee employee) {

String deptId = employee.getDepartment().getDeptId();

Department department = DeptDao.getDeptById(deptId);

employee.setDepartment(department);

dataMap.put(employee.getEmpId(), employee);

}

public Employee getEmpById(String empId) {

return dataMap.get(empId);

}

public List getEmpList() {

return new ArrayList<>(dataMap.values());

}

}

Department

package com.pojo;

public class Department {

private String deptId;

private String deptName;

public Department() {

}

public Department(String deptId, String deptName) {

super();

this.deptId = deptId;

this.deptName = deptName;

}

public String getDeptId() {

return deptId;

}

public void setDeptId(String deptId) {

this.deptId = deptId;

}

public String getDeptName() {

return deptName;

}

public void setDeptName(String deptName) {

this.deptName = deptName;

}

@Override

public String toString() {

return “Department [deptId=” + deptId + “, deptName=” + deptName + “]”;

}

}

Employee

package com.pojo;

public class Employee {

private String empId;

private String empName;

private String ssn;

private Department department;

public Employee(String empId, String empName, String ssn, Department department) {

super();

this.empId = empId;

this.empName = empName;

this.ssn = ssn;

this.department = department;

}

public Employee() {

}

public String getEmpId() {

return empId;

}

public void setEmpId(String empId) {

this.empId = empId;

}

public String getEmpName() {

return empName;

}

public void setEmpName(String empName) {

this.empName = empName;

}

public String getSsn() {

return ssn;

}

public void setSsn(String ssn) {

this.ssn = ssn;

}

public Department getDepartment() {

return department;

}

public void setDepartment(Department department) {

this.department = department;

}

@Override

public String toString() {

return “Employee [empId=” + empId + “, empName=” + empName + “, ssn=” + ssn + “, department=” + department

  • “]”;

}

}

Services

package com.services;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import com.dao.DeptDao;

import com.dao.EmpDao;

import com.pojo.Department;

import com.pojo.Employee;

@Service

public class Services {

@Autowired

private DeptDao deptDao;

@Autowired

private EmpDao empDao;

public List deptDaoList(){

return deptDao.getDeptList();

};

public List empDaoList(){

return empDao.getEmpList();

}

public void saveData(Employee employee) {

empDao.saveEmp(employee);

}

public void delectData(String empId) {

empDao.removeEmp(empId);

}

public Employee emdit(String empId) {

Employee empById = empDao.getEmpById(empId);

return empById;

}

public void updateEmp(Employee employee) {

empDao.updateEmp(employee);

}

}

Handled

package com.handled;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.PathVariable;

最后

现在其实从大厂招聘需求可见，在招聘要求上有高并发经验优先，包括很多朋友之前都是做传统行业或者外包项目，一直在小公司，技术搞的比较简单，没有怎么搞过分布式系统，但是现在互联网公司一般都是做分布式系统。

所以说，如果你想进大厂，想脱离传统行业，这些技术知识都是你必备的，下面自己手打了一份Java并发体系思维导图，希望对你有所帮助。

ivate EmpDao empDao;

public List deptDaoList(){

return deptDao.getDeptList();

};

public List empDaoList(){

return empDao.getEmpList();

}

public void saveData(Employee employee) {

empDao.saveEmp(employee);

}

public void delectData(String empId) {

empDao.removeEmp(empId);

}

public Employee emdit(String empId) {

Employee empById = empDao.getEmpById(empId);

return empById;

}

public void updateEmp(Employee employee) {

empDao.updateEmp(employee);

}

}

Handled

package com.handled;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.PathVariable;

最后

现在其实从大厂招聘需求可见，在招聘要求上有高并发经验优先，包括很多朋友之前都是做传统行业或者外包项目，一直在小公司，技术搞的比较简单，没有怎么搞过分布式系统，但是现在互联网公司一般都是做分布式系统。

所以说，如果你想进大厂，想脱离传统行业，这些技术知识都是你必备的，下面自己手打了一份Java并发体系思维导图，希望对你有所帮助。

[外链图片转存中…(img-Lr32USyX-1718903999369)]

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