java spring mvc 测试小程序
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mysql 数据库表结构
database javadb
table info
CREATE TABLE student (
sid int(11) NOT NULL AUTO_INCREMENT,
name varchar(255) DEFAULT NULL,
sex varchar(255) DEFAULT NULL,
age int(11) DEFAULT NULL,
country varchar(255) DEFAULT NULL,
data text,
imgurl varchar(1000) DEFAULT NULL,
PRIMARY KEY (sid)
) ENGINE=InnoDB AUTO_INCREMENT=130042104 DEFAULT CHARSET=utf8 COMMENT=’学生表’;
jsp spring mvc
/WEB-INF/web.xml 配置
<?xml version="1.0" encoding="utf-8" ?><web-app> <display-name>SpringMvc_demo1</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> </welcome-file-list> <!-- 静态资源不进入springmvc处理 --> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.swf</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.gif</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.jpg</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.png</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.xml</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.json</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.map</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.txt</url-pattern> </servlet-mapping> <!-- 监听环境加载 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <!-- 监听requst请求环境 --> <listener> <listener-class> org.springframework.web.context.request.RequestContextListener </listener-class> </listener> <!-- 环境变量 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:spring/xml/spring-server.xml </param-value> </context-param> <!-- SprngMvc1 servlet --> <servlet> <servlet-name>SpringMvc1</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/xml/springmvc-service.xml</param-value> </init-param> <on-load-startup>1</on-load-startup> </servlet> <!-- 处理请求 映射给spring mvc --> <servlet-mapping> <servlet-name>SpringMvc1</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping></web-app>java 包
在src目录下 spring.xml.springmvc-service.xml spring mvc 环境配置
<?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/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <context:component-scan base-package="web.app.controller" /> <mvc:annotation-driven /> <!-- 不处理静态资源 --> <mvc:default-servlet-handler /> <!-- 配置内部资源视图解析器 --> <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 前缀 --> <property name="prefix" value="/WEB-INF/view/" /> <!-- 后缀 --> <property name="suffix" value=".jsp" /> </bean> <!-- 支持上传文件 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="UTF-8" /> <property name="maxUploadSize" value="5400000" /> </bean></beans>src目录下 spring.xml.spring-server.xml spring 框架环境配置
<?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/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- mysql 数据库配置 --> <import resource="mysql-db-driver-manager.xml" /> <!-- 开启注解监听 --> <context:annotation-config /> <!-- 需要扫描的注解包 --> <context:component-scan base-package="spring.beans" /> </beans>spring.xml.mysql-db-driver-manager.xml 数据库配置dataSource
<?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/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- 解析数据库用户名和密码 --> <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:/spring/xml/database.properties</value> </list> </property> </bean> <!-- 数据库配置 - mysql - spring 方式 --> <bean id="mysql_driver_manager_dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </bean></beans>database.properties
#driver class pathjdbc.driverClassName=com.mysql.jdbc.Driver#database driver connection urljdbc.url=jdbc:mysql://localhost:3306/javadb?useUnicode=true&characterEncodong=utf-8#database usernamejdbc.username=xxxxx#database passwordjdbc.password=xxxxxxxxxxxxxsrc 目录下创建接口DbOper 作用为以后更换数据库关于数据库的操作都继承自DbOper的操作接口
standard.db.operation.DbOper
package standard.db.operation;import java.sql.Connection;import java.util.List;import java.util.Map;import spring.beans.db.realization.mysql.DataType;public interface DbOper{ /** * 数据库连接 * */ public void setConnection(Connection conn); public Connection getConnection(); /** * 查询所有数据 * @param * String 要执行的sql语句 * @param * String[] keyVal 映射数组 * @return * List<Map<String,String>> result 查询结果集 * */ public List<Map<String,String>> query(String sql,String[] keyVal); public List<Map<String,String>> query(String sql); /** * 查询单行数据 * @param * String 要执行的sql语句 * @param * String[] keyVal 映射数组 * @return * Map<String,String> result 查询结果集 * */ public Map<String,String> find(String sql,String[] keyVal); public Map<String,String> find(String sql); /** * 更新数据 * @param * String 要执行的sql语句 * @param * String[] keyVal 映射数组 * @return * int resultInt 受影响的行数 * */ public int update(String sql,String[] keyVal); public int update(String sql); /** * 新增数据 * @param * String 要执行的sql语句 * @param * String[] keyVal 映射数组 * @return * int resultInt 新增成功行数 * */ public int insert(String sql,String[] keyVal); public int insert(String sql); /** * 删除数据库 * @param * String 要执行的sql语句 * @param * String[] keyVal 映射数组 * @return * boolean 删除时候成功 * */ public boolean delete(String sql,String[] keyVal); public boolean delete(String sql); /** * 调用存储过程 * @param * String callFunc 存储过程名称 * List<Map<String,String>> 存储过程参数值 如：Map<"int","22"> * */ public List<Map<String,String>> callResult(String callFunc,List<DataType> keyVal); public List<Map<String,String>> callResult(String callFunc);}package spring.beans.db.realization.mysql.MysqlRealization;
package spring.beans.db.realization.mysql;import java.sql.Connection;import java.util.List;import java.util.ArrayList;import java.util.Map;import java.util.HashMap;import java.sql.CallableStatement; import java.sql.SQLException;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.ResultSetMetaData;import javax.annotation.PostConstruct;import javax.annotation.PreDestroy;import javax.sql.DataSource;import log.Log;import org.springframework.beans.factory.annotation.Value;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Repository;import standard.db.operation.DbOper;/** * mysql 操作实现类 - 容器 * author : 谭勇 * create_date : 2017-04-13 * */@Repository("db_connection")@Scope("request")public final class MysqlRealization implements DbOper{ private Connection conn; /** * 对象初始化 * */ @PostConstruct public void initDb() { } @Override public void setConnection(Connection conn) { this.conn = conn; } @Value(value="#{mysql_driver_manager_dataSource}") public void setConnection(DataSource dataSource) { try{ setConnection(dataSource.getConnection()); }catch(SQLException e) { Log.e(e.getMessage()); } } @Override public Connection getConnection() { return this.conn; } @Override public List<Map<String, String>> query(String sql, String[] keyVal) { PreparedStatement pre = null; ResultSet result = null; ResultSetMetaData meta = null; try{ pre = conn.prepareStatement(sql); if(keyVal != null) { //映射到问号 for(int i=1;i<=keyVal.length;i++) { pre.setString(i, keyVal[i-1]); } } result = pre.executeQuery(); if (result.next()) { meta = result.getMetaData(); result.last(); List<Map<String,String>> list = new ArrayList<Map<String,String>>(result.getRow()); result.first(); int propertiesLength = meta.getColumnCount(); do{ Map<String,String> map = new HashMap<String,String>(propertiesLength); for(int i=1;i<=propertiesLength;i++) { String keyName = meta.getColumnName(i); map.put(keyName, result.getString(keyName)); } list.add(map); }while(result.next()); return list; } }catch(SQLException e) { Log.e(e.getMessage()); e.printStackTrace(); }finally{ closePreparedStatement(pre); closeResultSet(result); } return null; } @Override public List<Map<String, String>> query(String sql) { return query(sql,null); } @Override public Map<String, String> find(String sql, String[] keyVal) { //Log.e(sql); PreparedStatement pre = null; ResultSet result = null; ResultSetMetaData meta = null; try{ pre = conn.prepareStatement(sql); if(keyVal != null) { //映射到问号 for(int i=1;i<=keyVal.length;i++) { pre.setString(i, keyVal[i-1]); } } result = pre.executeQuery(); if (result.next()) { meta = result.getMetaData(); int propertiesLength = meta.getColumnCount(); Map<String,String> map = new HashMap<String,String>(propertiesLength); for(int i=1;i<=propertiesLength;i++) { String keyName = meta.getColumnName(i); map.put(keyName, result.getString(keyName)); } return map; } }catch(SQLException e) { Log.e(e.getMessage()); e.printStackTrace(); }finally{ closePreparedStatement(pre); closeResultSet(result); } return null; } @Override public Map<String, String> find(String sql) { return find(sql,null); } @Override public int update(String sql, String[] keyVal) { PreparedStatement pre = null; try{ pre = conn.prepareStatement(sql); if(keyVal != null) { //映射到问号 for(int i=1;i<=keyVal.length;i++) { pre.setString(i, keyVal[i-1]); } } return pre.executeUpdate(); }catch(SQLException e) { Log.e(e.getMessage()); e.printStackTrace(); }finally{ closePreparedStatement(pre); } return 0; } @Override public int update(String sql) { return update(sql,null); } @Override public int insert(String sql, String[] keyVal) { PreparedStatement pre = null; try{ pre = conn.prepareStatement(sql); if(keyVal != null) { //映射到问号 for(int i=1;i<=keyVal.length;i++) { pre.setString(i, keyVal[i-1]); } } return pre.executeUpdate(); }catch(SQLException e) { Log.e(e.getMessage()); e.printStackTrace(); }finally{ closePreparedStatement(pre); } return 0; } @Override public int insert(String sql) { return insert(sql,null); } @Override public boolean delete(String sql, String[] keyVal) { PreparedStatement pre = null; try{ pre = conn.prepareStatement(sql); if(keyVal != null) { //映射到问号 for(int i=1;i<=keyVal.length;i++) { pre.setString(i, keyVal[i-1]); } } return pre.executeUpdate() > 0 ? true:false; }catch(SQLException e) { Log.e(e.getMessage()); e.printStackTrace(); }finally{ closePreparedStatement(pre); } return false; } @Override public boolean delete(String sql) { return delete(sql,null); } /** * 调用存储过程 * @param * String callFunc 存储过程名 * */ public List<Map<String,String>> callResult(String callFunc,List<DataType> keyVal) { String call = "{call " + callFunc + "}"; ResultSetMetaData meta = null; CallableStatement callableStatement= null; ResultSet result = null; try{ callableStatement = conn.prepareCall(call); if(keyVal != null) { for(int i=1;i<=keyVal.size();i++) { DataType data = keyVal.get(i-1); switch(data.getType()) { case ValueTypeSource.STRING: callableStatement.setString(i, String.valueOf(data.getValue())); break; case ValueTypeSource.INT: callableStatement.setInt(i, Integer.valueOf(data.getValue())); break; case ValueTypeSource.LONG: callableStatement.setLong(i, Long.valueOf(data.getValue())); break; case ValueTypeSource.DOUBLE: callableStatement.setDouble(i, Double.valueOf(data.getValue())); break; default: callableStatement.setString(i,String.valueOf(data.getValue())); } } } callableStatement.execute(); result = callableStatement.getResultSet(); meta = result.getMetaData(); result.last(); List<Map<String,String>> list = new ArrayList<Map<String,String>>(result.getRow()); result.first(); int propertiesLength = meta.getColumnCount(); do{ Map<String,String> map = new HashMap<String,String>(propertiesLength); for(int i=1;i<=propertiesLength;i++) { String keyName = meta.getColumnName(i); map.put(keyName, result.getString(keyName)); } list.add(map); }while(result.next()); return list; }catch(SQLException e) { e.printStackTrace(); return null; }finally{ closeCallableStatement(callableStatement); closeResultSet(result); } } @Override public List<Map<String,String>> callResult(String callFunc) { return callResult(callFunc,null); } /** * 关闭资源链接 * */ private void closePreparedStatement(PreparedStatement pre) { if(pre != null) { try { pre.close(); }catch(SQLException e) { e.printStackTrace(); } } } private void closeResultSet(ResultSet result) { if(result != null) { try { result.close(); }catch(SQLException e) { e.printStackTrace(); } } } private void closeCallableStatement(CallableStatement call) { if(call != null) { try { call.close(); }catch(SQLException e) { e.printStackTrace(); } } } private void closeConnection(Connection conn) { if(conn != null) { try { conn.close(); }catch(SQLException e) { e.printStackTrace(); } } } /** * 对象注销 * */ @PreDestroy public void closeDb() { closeConnection(conn); }}调用存储过程需要的工具类
spring.beans.db.realization.mysql.DataType
package spring.beans.db.realization.mysql;public final class DataType { private String keyName; private String value; private int type; public DataType(){} public DataType(String keyName,String value,int type) { setKeyName(keyName); setValue(value); setType(type); } public void setKeyName(String keyName) { this.keyName = keyName; } public void setValue(String value) { this.value = value; } public void setType(int type) { this.type = type; } public String getKeyName() { return keyName; } public String getValue() { return value; } public int getType() { return type; }}spring.beans.db.realization.mysql.ValueType
package spring.beans.db.realization.mysql;public enum ValueType { INT(ValueTypeSource.INT), STRING(ValueTypeSource.STRING), DOUBLE(ValueTypeSource.DOUBLE), CHAR(ValueTypeSource.CHAR), DATE(ValueTypeSource.DATE), BLOB(ValueTypeSource.BLOB), LONG(ValueTypeSource.LONG); private int type; private ValueType(int type) { this.type = type; } public int getType() { return type; }}spring.beans.db.realization.mysql.ValueTypeSource
package spring.beans.db.realization.mysql;public final class ValueTypeSource { public final static int INT=1, STRING=2, DOUBLE=3, CHAR=4, DATE=5, LONG=6, BLOB=7;}至此mysql配置和mysql操作类结束
接下来是关于Student的服务
spring.beans.service.StudentService 前面我们已经在spring-service 添加了该包的解析(<context:component-scan base-package="spring.beans">)
package spring.beans.service;import javax.annotation.Resource;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Service;import model.Student;import standard.db.operation.DbOper;import java.util.Map;import java.util.List;import java.util.ArrayList;import tool.Config;@Service("service_student")@Scope("request")public class StudentService { @Resource(name="db_connection") private DbOper dbOper; /** * 获取某个学生信息 * @param * String sid 学生sid * @return * Student student 学生信息 * */ public Student getStudent(String sid) { String sql = "select * from student where sid = ?"; String[] keyVal = new String[]{sid}; Map<String,String> student = dbOper.find(sql, keyVal); if(student == null) { return null; } return new Student(student); } /** * 获得一部分学生信息 * @param * ing page 分页数 * List<Student> 学生信息 * */ public List<Student> getStudents(int page) { int limitStartIndex = (page - 1) * Config.pageSize; String sql = "select * from student limit " + limitStartIndex+","+Config.pageSize; List<Map<String,String>> list = dbOper.query(sql); if(list == null) { return null; } List<Student> students = new ArrayList<Student>(list.size()); for(Map<String,String> student:list) { students.add(new Student(student)); } return students; }}tool.Config 类
package tool;public class Config { public final static int pageSize = 10;}model.Student student 模型类
package model;import java.util.Map;public class Student { private String sid; private String name; private String sex; private String age; private String country; private String data; private String imgurl; public Student(){} public Student(String sid,String name,String sex,String age,String country,String data,String imgurl) { setSid(sid); setName(name); setSex(sex); setAge(age); setCountry(country); setData(data); setImgurl(imgurl); } public Student(Map<String,String> student) { setSid(student.get("sid")); setName(student.get("name")); setSex(student.get("sex")); setAge(student.get("age")); setCountry(student.get("country")); setData(student.get("data")); setImgurl(student.get("imgurl")); } public void setSid(String sid) { this.sid = sid; } public String getSid() { return this.sid; } public void setName(String name) { this.name = name; } public String getName() { return name; } public void setSex(String sex) { this.sex = sex; } public String getSex() { return sex; } public void setAge(String age) { this.age = age; } public String getAge() { return age; } public void setCountry(String country) { this.country = country; } public String getCountry() { return country; } public void setData(String data) { this.data = data; } public String getData() { return data; } public void setImgurl(String imgurl) { this.imgurl = imgurl; } public String getImgurl() { return imgurl; }}前端响应控制
web.app.controller.IndexController 前面我们已经在springmvc-service.xml中添加了该包的解析
package web.app.controller;import javax.annotation.Resource;import model.Student;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.servlet.ModelAndView;import spring.beans.service.StudentService;import java.util.List;@Controller@RequestMapping("Index")@Scope("request")public class IndexController { @Resource(name="service_student") private StudentService studentService; /** * 首页方法 * @request * */ @RequestMapping(value="index",method={RequestMethod.GET}) public ModelAndView index() { return new ModelAndView("Index/index","hello","hello world！"); } /** * 查看某一个学生的基本信息 * @request * String sid 学生sid * */ @RequestMapping(value="getStudent",method={RequestMethod.GET,RequestMethod.POST}) public ModelAndView getStudent(@RequestParam(value="sid",required=false,defaultValue="") String sid) { Student student = null; if(!sid.equals("")) { student = studentService.getStudent(sid); } return new ModelAndView("Index/getStudent","student",student); } /** * 获得多个学生的信息 * @request * int page 分页数 * */ @RequestMapping(value="getStudents/{page}",method={RequestMethod.GET,RequestMethod.POST}) public ModelAndView getStudents(@PathVariable(value="page") int page) { return new ModelAndView("Index/getStudents","students",studentService.getStudents(page)); }}根据springmvc-service的配置我们可以发现模版解析的路径在/WEB-INF/view文件夹下面
/WEB-INF/view/Index/getStudent.jsp
<%@ page language="java" pageEncoding="utf-8" contentType="text/html;charset=utf-8" isELIgnored="false" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><!DOCTPYE html><html> <head> <meta charset="tutf-8" /> <title>student info</title> </head> <body> <!-- if else 模版语法 --> <c:choose> <c:when test="${!empty student}"> <p>学号:${student.sid}</p> <p>姓名:${student.name}</p> <p>性别:${student.sex}</p> <p>年龄:${student.age}</p> <p>简介:${student.data}</p> </c:when> <c:otherwise> <p>没有找到相应的学生</p> </c:otherwise> </c:choose> </body></html>/WEB-INF/view/Index/getStudents.jsp
<%@ page language="java" pageEncoding="utf-8" contentType="text/html;charset=utf-8" isELIgnored="false" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><!DOCTYPE html><html> <head> <meta charset="utf-8" /> <title>get students</title> <style> *{margin:0px;padding:0px;} </style> </head> <body> <c:choose> <c:when test="${!empty students}"> <c:forEach items="${students}" var="student"> <div style="margin-top:20px;"> <p>学号:${student.sid}</p> <p>姓名:${student.name}</p> <p>性别:${student.sex}</p> <p>年龄:${student.age}</p> <p>简介:${student.data}</p> </div> </c:forEach> </c:when> <c:when test="${empty students}"> <p>娃哈哈哈哈</p> </c:when> <c:otherwise> <p>没有相关分页的信息</p> </c:otherwise> </c:choose> </body></html>/WEB-INF/view/Index/index.jsp
<%@ page language="java" pageEncoding="utf-8" contentType="text/html;charset=utf-8" isELIgnored="false" %><!DOCTYPE html><html> <head> <meta charset="utf-8" /> <title>hello world</title> </head> <body> <p>${hello}</p> </body></html> 0 0
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