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更改返回标签的方式

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This commit is contained in:
cyk
2023-07-02 10:22:43 +08:00
parent 704da139be
commit 85dee231a9
4 changed files with 142 additions and 85 deletions
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44
src/com/hellogithub/dao/categoryDao.java Normal file
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@@ -0,0 +1,44 @@
package com.hellogithub.dao;
import com.hellogithub.entity.categoryEntity;
import com.hellogithub.entity.projectEntity;
import com.hellogithub.utils.JdbcUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
public class categoryDao {
//返回所有标签
public List<categoryEntity> retLabel() {
List<categoryEntity> categoryEntity;
try {
Connection conn = JdbcUtils.getConnection();
QueryRunner runner = new QueryRunner();
String sql = "select * from category ";
categoryEntity = runner.query(conn, sql, new BeanListHandler<>(categoryEntity.class));
conn.close();
} catch (SQLException e) {
throw new RuntimeException(e);
}
return categoryEntity;
}
//发送Id找中文名字
public categoryEntity retNum(int id ) {
categoryEntity categoryEntity;
try {
Connection conn = JdbcUtils.getConnection();
QueryRunner runner = new QueryRunner();
String sql = "select * from category where categoryId=?";
categoryEntity = runner.query(conn, sql, new BeanHandler<>(categoryEntity.class),id);
conn.close();
} catch (SQLException e) {
throw new RuntimeException(e);
}
return categoryEntity;
}
}

16
src/com/hellogithub/service/categoryService.java Normal file
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@@ -0,0 +1,16 @@
package com.hellogithub.service;
import com.hellogithub.dao.projectDao;
import com.hellogithub.dao.categoryDao;
import com.hellogithub.entity.categoryEntity;
import java.util.List;
public class categoryService {
private categoryDao categoryDao = new categoryDao();
public List<categoryEntity> retLabel() {return categoryDao.retLabel();}
public categoryEntity retNum(int id ){return categoryDao.retNum(id);}
}

105
src/com/hellogithub/service/projectService.java
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@@ -1,47 +1,30 @@
package com.hellogithub.service;
import com.hellogithub.dao.UserDao;
import com.hellogithub.dao.projectDao;
import com.hellogithub.entity.projectEntity;
import java.util.HashMap;
import java.util.Iterator;
import com.hellogithub.dao.categoryDao;
import com.hellogithub.dao.projectDao;
import com.hellogithub.entity.categoryEntity;
import com.hellogithub.entity.projectEntity;
import java.util.List;
import java.util.Map;
public class projectService {
private projectDao projectDao = new projectDao();
private categoryDao categoryDao = new categoryDao();
/**
* 按照期刊号查询
*
* @param num
*/
public List<projectEntity> retTerm(String num){
Map<Integer,String> dataMap=new HashMap<>();
dataMap.put(1,"C项目");
dataMap.put(2,"C#项目");
dataMap.put(3,"C++项目");
dataMap.put(4,"CSS项目");
dataMap.put(5,"Go项目");
dataMap.put(6,"Java项目");
dataMap.put(7,"Javascript项目");
dataMap.put(8,"Kotlin项目");
dataMap.put(9,"Obejctive-C项目");
dataMap.put(10,"PHP项目");
dataMap.put(11,"Python项目");
dataMap.put(12,"Ruby项目");
dataMap.put(13,"Rust项目");
dataMap.put(14,"Swift项目");
dataMap.put(15,"其他");
dataMap.put(16,"开源书籍");
dataMap.put(17,"机器学习");
List<projectEntity> projectEntityList = projectDao.retTerm(num);
for(int i =0;i<projectEntityList.size();i++)
{
projectEntity projectEntity = projectEntityList.get(i);
projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
projectEntity.setCategoryName(categoryEntity.getCategory());
}
return projectDao.retTerm(num);
@@ -70,31 +53,14 @@ public class projectService {
}
public List<projectEntity> retLatestProject(int cate) {
Map<Integer,String> dataMap=new HashMap<>();
dataMap.put(1,"C项目");
dataMap.put(2,"C#项目");
dataMap.put(3,"C++项目");
dataMap.put(4,"CSS项目");
dataMap.put(5,"Go项目");
dataMap.put(6,"Java项目");
dataMap.put(7,"Javascript项目");
dataMap.put(8,"Kotlin项目");
dataMap.put(9,"Obejctive-C项目");
dataMap.put(10,"PHP项目");
dataMap.put(11,"Python项目");
dataMap.put(12,"Ruby项目");
dataMap.put(13,"Rust项目");
dataMap.put(14,"Swift项目");
dataMap.put(15,"其他");
dataMap.put(16,"开源书籍");
dataMap.put(17,"机器学习");
List<projectEntity> projectEntityList;
if (cate == 0) {
projectEntityList =projectDao.retLatestProject();
for(int i =0;i<projectEntityList.size();i++)
{
projectEntity projectEntity = projectEntityList.get(i);
projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
projectEntity.setCategoryName(categoryEntity.getCategory());
}
} else {
@@ -102,7 +68,8 @@ public class projectService {
for(int i =0;i<projectEntityList.size();i++)
{
projectEntity projectEntity = projectEntityList.get(i);
projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
projectEntity.setCategoryName(categoryEntity.getCategory());
}
@@ -110,24 +77,7 @@ public class projectService {
return projectEntityList;
}
public List<projectEntity> retSelcetByStar(int cate){
Map<Integer,String> dataMap=new HashMap<>();
dataMap.put(1,"C项目");
dataMap.put(2,"C#项目");
dataMap.put(3,"C++项目");
dataMap.put(4,"CSS项目");
dataMap.put(5,"Go项目");
dataMap.put(6,"Java项目");
dataMap.put(7,"Javascript项目");
dataMap.put(8,"Kotlin项目");
dataMap.put(9,"Obejctive-C项目");
dataMap.put(10,"PHP项目");
dataMap.put(11,"Python项目");
dataMap.put(12,"Ruby项目");
dataMap.put(13,"Rust项目");
dataMap.put(14,"Swift项目");
dataMap.put(15,"其他");
dataMap.put(16,"开源书籍");
dataMap.put(17,"机器学习");
List<projectEntity> projectEntityList;
if (cate == 0){
@@ -136,7 +86,8 @@ public class projectService {
{
projectEntity projectEntity = projectEntityList.get(i);
projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
projectEntity.setCategoryName(categoryEntity.getCategory());
}
}else {
@@ -146,37 +97,21 @@ public class projectService {
{
projectEntity projectEntity = projectEntityList.get(i);
projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
projectEntity.setCategoryName(categoryEntity.getCategory());
}
}
return projectEntityList;
}
public List<projectEntity> selectByInput(String str){
Map<Integer,String> dataMap=new HashMap<>();
dataMap.put(1,"C项目");
dataMap.put(2,"C#项目");
dataMap.put(3,"C++项目");
dataMap.put(4,"CSS项目");
dataMap.put(5,"Go项目");
dataMap.put(6,"Java项目");
dataMap.put(7,"Javascript项目");
dataMap.put(8,"Kotlin项目");
dataMap.put(9,"Obejctive-C项目");
dataMap.put(10,"PHP项目");
dataMap.put(11,"Python项目");
dataMap.put(12,"Ruby项目");
dataMap.put(13,"Rust项目");
dataMap.put(14,"Swift项目");
dataMap.put(15,"其他");
dataMap.put(16,"开源书籍");
dataMap.put(17,"机器学习");
List<projectEntity> projectEntityList = projectDao.selectByInput(str);
for(int i =0;i<projectEntityList.size();i++)
{
projectEntity projectEntity = projectEntityList.get(i);
projectEntity.setCategoryName(dataMap.get(projectEntity.getCategoryId()));
categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId());
projectEntity.setCategoryName(categoryEntity.getCategory());
}
return projectEntityList;

62
src/com/hellogithub/servlet/retLabelServlet.java Normal file
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@@ -0,0 +1,62 @@
package com.hellogithub.servlet;
import com.alibaba.fastjson.JSONObject;
import com.hellogithub.service.categoryService;
import jakarta.servlet.ServletConfig;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
public class retLabelServlet extends HttpServlet {
private categoryService categoryService=new categoryService();
@Override
public void init(ServletConfig config) throws ServletException {
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setCharacterEncoding("UTF-8");
resp.setContentType("text/html; charset=utf-8");
// 设置响应头允许ajax跨域访问
String curOrigin = req.getHeader("Origin");
resp.setHeader("Access-Control-Allow-Origin", curOrigin == null ? "true" : curOrigin);
resp.setHeader("Access-Control-Allow-Credentials", "true");
resp.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD");
resp.setHeader("Access-Control-Max-Age", "3600");
resp.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With");
resp.setContentType("application/json;charset=UTF-8");
//返回最新期刊数字
PrintWriter writer = resp.getWriter();
String jsonString = JSONObject.toJSONString(categoryService.retLabel());
setResultOK("success",writer);
writer.println(jsonString);
writer.close();
}
public void setResult(Integer code, String msg, PrintWriter writer) {
HashMap<String, Object> result = new HashMap<>();
result.put("code", code);
result.put("msg", msg);
String jsonString = JSONObject.toJSONString(result);
writer.println(jsonString);
writer.close();
}
public void setResultError(String msg, PrintWriter writer) {
setResult(500, msg, writer);
}
public void setResultOK(String msg, PrintWriter writer) {
setResult(200, msg, writer);
}
}