javaweb 第四次作业

花荣04

已于 2024-04-24 20:21:40 修改

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文章标签： java 前端 web spring boot servlet

于 2024-04-21 18:38:45 首次发布

本文链接：https://blog.youkuaiyun.com/2301_79689379/article/details/138041136

版权

常规controller

package com.itheima.controller;

import com.itheima.pojo.Emp;
import com.itheima.pojo.Result;
import com.itheima.service.EmpService;
import com.itheima.service.impl.EmpServiceA;
import com.itheima.utils.XmlParserUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class EmpController {
@RequestMapping("/listEmp")
public Result list(){
    //1. 加载并解析emp.xml
    String file = this.getClass().getClassLoader().getResource("emp.xml").getFile();
    System.out.println(file);
    List<Emp> empList = XmlParserUtils.parse(file, Emp.class);

    //2. 对数据进行转换处理 - gender, job
    empList.stream().forEach(emp -> {
        //处理 gender 1: 男, 2: 女
        String gender = emp.getGender();
        if("1".equals(gender)){
            emp.setGender("男");
        }else if("2".equals(gender)){
            emp.setGender("女");
        }

        //处理job - 1: 讲师, 2: 班主任 , 3: 就业指导
        String job = emp.getJob();
        if("1".equals(job)){
            emp.setJob("讲师");
        }else if("2".equals(job)){
            emp.setJob("班主任");
        }else if("3".equals(job)){
            emp.setJob("就业指导");
        }
    });
  //3. 响应数据
        return Result.success(empList);
    }

}

分层

controller负责接受和响应

service负责逻辑处理

dao负责获取数据，数据访问

ioc容器控制反转和依赖注入

controller中

service中

dao中

作业

1.常规controller实现

poet.xml

<?xml version="1.0" encoding="UTF-8"?>
<poets>
    <poet>
        <index>1</index>
        <author>陶渊明</author>
        <gender>1</gender>
        <dynasty>东晋末至南朝宋初期</dynasty>
        <title>诗人和辞赋家</title>
        <style>古今隐逸诗人之宗</style>
    </poet>
    <poet>
        <index>2</index>
        <author>王维</author>
        <gender>1</gender>
        <dynasty>唐代</dynasty>
        <title>诗佛</title>
        <style>空灵、寂静</style>
    </poet>
    <poet>
        <index>3</index>
        <author>李白</author>
        <gender>1</gender>
        <dynasty>唐代</dynasty>
        <title>诗仙</title>
        <style>豪放飘逸的诗风和丰富的想象力</style>
    </poet>
    <poet>
        <index>4</index>
        <author>李商隐</author>
        <gender>2</gender>
        <dynasty>唐代</dynasty>
        <title>诗坛鬼才</title>
        <style>无</style>
    </poet>
    <poet>
        <index>5</index>
        <author>李清照</author>
        <gender>2</gender>
        <dynasty>宋代</dynasty>
        <title>女词人</title>
        <style>婉约风格</style>
    </poet>
    <poet>
        <index>6</index>
        <author>杜甫</author>
        <gender>1</gender>
        <dynasty>唐代</dynasty>
        <title>诗圣</title>
        <style>反映社会现实和人民疾苦</style>
    </poet>
    <poet>
        <index>7</index>
        <author>苏轼</author>
        <gender>1</gender>
        <dynasty>北宋</dynasty>
        <title>文学家、书画家，诗神</title>
        <style>清新豪健的诗风和独特的艺术表现力</style>
    </poet>
</poets>

poet.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>诗人信息</title>
</head>
<link rel="stylesheet" href="element-ui/index.css">
<script src="./js/vue.js"></script>
<script src="./element-ui/index.js"></script>
<script src="./js/axios-0.18.0.js"></script>

<body>
<h1 align="center">员工信息列表展示</h1>
<div id="app">
    <el-table :data="tableData" style="width: 100%"  stripe border >
        <el-table-column prop="index" label="编号" align="center" ></el-table-column>
        <el-table-column prop="author" label="姓名" align="center" ></el-table-column>
        <el-table-column prop="gender" label="性别" align="center" ></el-table-column>
        <el-table-column prop="dynasty" label="朝代" align="center" ></el-table-column>
        <el-table-column prop="title"  label="头衔"  align="center" ></el-table-column>
        <el-table-column prop="style"  label="风格"  align="center" width="400px" ></el-table-column>
    </el-table>
</div>
</body>




<style>
    .el-table .warning-row {
        background: oldlace;
    }
    .el-table .success-row {
        background: #f0f9eb;
    }
</style>

<script>
    new Vue({
        el: "#app",
        data() {
            return {
                tableData: []
            }
        },
        mounted(){
            axios.get('/listPoet').then(res=>{
                if(res.data.code){
                    this.tableData = res.data.data;
                }
            });
        },
        methods: {
        }
    });
</script>
</html>

XmlParserUtilsA

import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import java.io.File;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.List;

public class XmlParserUtilsA {

    public static <T> List<T> parse(String file , Class<T> targetClass)  {
        ArrayList<T> list = new ArrayList<T>(); //封装解析出来的数据
        try {
            //1.获取一个解析器对象
            SAXReader saxReader = new SAXReader();
            //2.利用解析器把xml文件加载到内存中,并返回一个文档对象
            Document document = saxReader.read(new File(file));
            //3.获取到根标签
            Element rootElement = document.getRootElement();
            //4.通过根标签来获取 user 标签
            List<Element> elements = rootElement.elements("poet");

            //5.遍历集合,得到每一个 user 标签
            for (Element element : elements) {
                String index = element.element("index").getText();
                //获取 name 属性
                String author = element.element("author").getText();
                //获取 age 属性
                String gender = element.element("gender").getText();
                //获取 image 属性
                String dynasty = element.element("dynasty").getText();
                //获取 gender 属性
                String title = element.element("title").getText();
                //获取 job 属性
                String style= element.element("style").getText();

                //组装数据
                Constructor<T> constructor = targetClass.getDeclaredConstructor(String.class, String.class, String.class, String.class, String.class, String.class);
                constructor.setAccessible(true);
                T object = constructor.newInstance(index,author, gender, dynasty, title, style);

                list.add(object);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return list;
    }

}

实体 Poet

package com.itheima.pojo;

public class Poet {
    private String index;
    private String author;
    private String gender;
    private String dynasty;
    private String title;
    private String style;
    public Poet(){

    }

    public Poet(String index, String author, String gender, String dynasty, String title, String style) {
        this.index = index;
        this.author = author;
        this.gender = gender;
        this.dynasty = dynasty;
        this.title = title;
        this.style = style;
    }

    @Override
    public String toString() {
        return "Poet{" +
                "index=" + index +
                ", author='" + author + '\'' +
                ", gender='" + gender + '\'' +
                ", dynasty='" + dynasty + '\'' +
                ", title='" + title + '\'' +
                ", style='" + style + '\'' +
                '}';
    }

    public String getIndex() {
        return index;
    }

    public void setIndex(String index) {
        this.index = index;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getDynasty() {
        return dynasty;
    }

    public void setDynasty(String dynasty) {
        this.dynasty = dynasty;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getStyle() {
        return style;
    }

    public void setStyle(String style) {
        this.style = style;
    }

}

PoetContrroller

package com.itheima.controller;

import com.itheima.pojo.Poet;
import com.itheima.pojo.Result;
import com.itheima.utils.XmlParserUtils;
import com.itheima.utils.XmlParserUtilsA;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.Objects;

@RestController
public class PoetController {
    @RequestMapping("/listPoet")
    public Result list() {
        //1. 加载并解析poet.xml
        String file = this.getClass().getClassLoader().getResource("poet.xml").getFile();
        System.out.println(file);
        List<Poet> poetList = XmlParserUtilsA.parse(file, Poet.class);

        //2. 对数据进行转换处理 - gender
        poetList.stream().forEach(poet -> {
            //处理 gender 1: 男, 2: 女
            String gender = poet.getGender();
            if ("1".equals(gender)) {
                poet.setGender("男");
            } else if ("2".equals(gender)) {
                poet.setGender("女");
            }


        });
        //3.返回值
        return Result.success(poetList);
    }
}