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HackergeekHackergeek
committed
finished student_jdbc 2016/05/07
1 parent a6700d1 commit 63cdc7d

19 files changed

+246
-55
lines changed

‎student_jdbc/.classpath‎

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<attribute name="owner.project.facets" value="jst.web.jstl"/>
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</attributes>
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</classpathentry>
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<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/mysql-connector-java-5.6-bin.jar"/>
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<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
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</classpath>

‎student_jdbc/.project‎

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>student</name>
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<name>student_jdbc</name>
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<comment></comment>
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<projects>
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</projects>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>com.genuitec.eclipse.ast.deploy.core.DeploymentBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.jem.workbench.JavaEMFNature</nature>

‎student_jdbc/.settings/org.eclipse.wst.common.component‎

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<?xml version="1.0" encoding="UTF-8"?><project-modules id="moduleCoreId" project-version="1.5.0">
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<wb-module deploy-name="student">
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<wb-module deploy-name="student_jdbc">
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<wb-resource deploy-path="/" source-path="/WebRoot" tag="defaultRootSource"/>
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<wb-resource deploy-path="/WEB-INF/classes" source-path="/src"/>
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<property name="context-root" value="student"/>
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<property name="java-output-path" value="/student/WebRoot/WEB-INF/classes"/>
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<property name="java-output-path" value="/student_jdbc/WebRoot/WEB-INF/classes"/>
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<property name="context-root" value="student_jdbc"/>
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</wb-module>
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</project-modules>

‎student_jdbc/WebRoot/WEB-INF/lib/mysql-connector-java-5.6-bin.jar‎

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‎student_jdbc/WebRoot/delete_stu_1.jsp‎

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<%@page language="java" import="java.sql.*" pageEncoding="UTF-8" %>
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<%request.setCharacterEncoding("UTF-8"); %>
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<html>
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<head><title>删除一条记录页面</title></head>
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<body>
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<%
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//使用PreparedStatement对象实现数据库记录的修改，其步骤如下：
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//（1）建立数据库的连接
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String driverName = "com.mysql.jdbc.Driver";
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String userName = "root";
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String userPwd = "root";
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String dbName = "students";
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String url1 = "jdbc:mysql://localhost:3306/" + dbName;
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String url2 = "?user=" + userName + "&password=" + userPwd;
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String url3 = "&useUnicode=true&characterEncoding=UTF-8";
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String url = url1 + url2 + url3;
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Class.forName(driverName);
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Connection conn = DriverManager.getConnection(url);
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//（2）形成带参数的修改SQL语句
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String sql = "delete from stu_info where weight>=?";
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//（3）利用数据库连接对象建立PreparedStatement对象
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PreparedStatement pstmt = conn.prepareStatement(sql);
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//（4）若是带参数的SQL语句，则对各参数设置相应的参数值
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pstmt.setFloat(1, 80);
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//（5）调用PreparedStatement对象中的executeUpdate()方法
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int n = pstmt.executeUpdate();
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//（6）根据executeUpdate()方法的返回值，判断执行结果
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if(n==1) {%> 数据删除操作成功！<br><%}
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else {%> 数据删除操作失败！<br><%}
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//（7）关闭所有资源
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if(pstmt != null) pstmt.close();
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if(conn != null) conn.close();
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%>
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</body>
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</html>

‎student_jdbc/WebRoot/delete_stu_2.jsp‎

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<%@page contentType="text/html; charset=UTF-8" import="java.sql.*" %>
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<html>
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<head><title>利用提交条件删除记录页面</title></head>
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<body>
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<center>
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<%
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String driverName = "com.mysql.jdbc.Driver";
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String userName = "root";
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String userPwd = "root";
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String dbName = "students";
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String url1 = "jdbc:mysql://localhost:3306/" + dbName;
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String url2 = "?user=" + userName + "&password=" + userPwd;
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String url3 = "&useUnicode=true&characterEncoding=UTF-8";
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String url = url1 + url2 + url3;
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Class.forName(driverName);
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Connection conn = DriverManager.getConnection(url);
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request.setCharacterEncoding("UTF-8");
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String name = request.getParameter("name");
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String sex = request.getParameter("sex");
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String ww1 = request.getParameter("w1");
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String ww2 = request.getParameter("w2");
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String s = "1=1 ";
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if(!name.equals("")) s = s + "and name='"+ name + "' ";
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if(sex!=null) s = s + "and sex='" + sex + "' ";
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double w1,w2;
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if(!ww1.equals("")) {
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w1 = Double.parseDouble(request.getParameter("w1"));
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s = s + "and weight>=" + w1;
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}
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if(!ww2.equals("")) {
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w2 = Double.parseDouble(request.getParameter("w2"));
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s = s + " and weight<=" + w2;
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}
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String sql = "delete from stu_info where " + s;
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PreparedStatement pstmt = conn.prepareStatement(sql);
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//（5）调用PreparedStatement对象中的executeUpdate()方法
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int n = pstmt.executeUpdate();
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//（6）根据executeUpdate()方法的返回值，判断执行结果
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if(n>=1) {%> 数据修改操作成功！<br><%}
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else {%> 数据修改操作失败！<br><%}
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//（7）关闭所有资源
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if(pstmt != null) pstmt.close();
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if(conn != null) conn.close();
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%>
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</body>
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</html>

‎student_jdbc/WebRoot/delete_stu_2_tijiao.jsp‎

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<%@page language="java" import="java.sql.*" pageEncoding="UTF-8"%>
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<%request.setCharacterEncoding("UTF-8"); %>
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<html>
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<head>
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<title>删除条件提交页面</title>
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</head>
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<body>
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请选择删除记录条件
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<hr width="100%" size="3">
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<form action="delete_stu_2.jsp" method="post">
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姓名：<input type="text" name="name"><br> <br> 性别： 男<input
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type="radio" value="男" name="sex"> 女<input type="radio"
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value="女" name="sex"><br> <br> 体重范围：
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<p>
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最小<input type="text" name="w1"> <br> <br>
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最大<input type="text" name="w2">
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</p>
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<input type="submit" value="提 交"> &nbsp;&nbsp;&nbsp;&nbsp; <input
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type="reset" value="取 消">
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</form>
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</body>
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</html>

‎student_jdbc/WebRoot/find_stu_1.jsp‎

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<body>
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<center>
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<%
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request.setCharacterEncoding("UTF-8");
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//使用PreparedStudio对象实现数据库查询，其步骤如下：
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//（1）建立数据库的连接
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String driverName = "com.mysql.jdbc.Driver";
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String userName = "root";
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String userPwd = "root";
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String dbName = "student";
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String dbName = "students";
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String url1 = "jdbc:mysql://localhost:3306/" + dbName;
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String url2 = "?user=" + userName + "&password=" + userPwd;
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String url3 = "&useUnicode=true&characterEncoding=UTF-8";
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String url = url1 + url2 + url3;
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Class.forName(driverName);
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Connection conn = DriverManager.getConnection(url);
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//（2）形成查询SQL语句
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String sql = "select * from students_info";
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String sql = "select * from stu_info";
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//（3）利用数据库连接对象建立PreparedStatement对象
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PreparedStatement pstmt = conn.prepareStatement(sql);
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//调用PreparedStatement的对象的executeQuery（）方法，并返回ResultSet对象

‎student_jdbc/WebRoot/find_stu_2.jsp‎

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<%@page contentType="text/html; charset=UTF-8" import="java.sql.*" %>
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<%request.setCharacterEncoding("UTF-8"); %>
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<html>
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<head><title>显示体重值在60至80之间的学生</title></head>
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<body>
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String driverName = "com.mysql.jdbc.Driver";
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String userName = "root";
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String userPwd = "root";
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String dbName = "student";
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String dbName = "students";
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String url1 = "jdbc:mysql://localhost:3306/" + dbName;
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String url2 = "?user=" + userName + "&password=" + userPwd;
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String url3 = "&useUnicode=true&characterEncoding=UTF-8";
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String url = url1 + url2 + url3;
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Class.forName(driverName);
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Connection conn = DriverManager.getConnection(url);
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//带参数的SQL语句
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String sql = "select * from students_info where weight>=? and weight<=?";
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String sql = "select * from stu_info where weight>=? and weight<=?";
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//不带参数的SQL语句
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//String sql = "select * from students_info where weight>=60 and weight<=80";
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PreparedStatement pstmt = conn.prepareStatement(sql);

‎student_jdbc/WebRoot/find_stu_3.jsp‎

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String driverName = "com.mysql.jdbc.Driver";
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String userName = "root";
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String userPwd = "root";
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String dbName = "student";
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String dbName = "students";
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String url1 = "jdbc:mysql://localhost:3306/" + dbName;
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String url2 = "?user=" + userName + "&password=" + userPwd;
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String url3 = "&useUnicode=true&characterEncoding=UTF-8";
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String sex = request.getParameter("sex");
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float weight1 = Float.parseFloat(request.getParameter("w1"));
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float weight2 = Float.parseFloat(request.getParameter("w2"));
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String sql = "select * from students_info where sex=? and weight>=? and weight<=?";
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String sql = "select * from stu_info where sex=? and weight>=? and weight<=?";
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PreparedStatement pstmt = conn.prepareStatement(sql);
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pstmt.setString(1, sex);
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pstmt.setFloat(2, weight1);

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