Tomcat8 Java8 Eclipse4.4 servlet开发环境搭建
Tomcat8 Java8 Eclipse4.4 servlet开发环境搭建
■概要
OS : Microsoft Windows [Version 6.0.6002]
eclipse. 4.4 : Version: Luna Service Release 2 (4.4.2) Build id: 20150219-0600
http://www.eclipse.org/
Java : java version "1.8.0_20" Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html#javasejdk
Tomcat : Server version: Apache Tomcat/8.0.21 Server built: Mar 23 2015 14:11:21 UTC
http://tomcat.apache.org/download-80.cgi
■配置
new->server->Tomcat v8.0 Server
localhost
servername
Apache Tomcat v8.0
resource
编码UTF-8
File->New->Other
Web->Servlet
Create Servelt
例子
package example.part1;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class HelloWorld
*/
@WebServlet("/HelloWorld")
public class HelloWorld extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public HelloWorld() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().write("Hello, World!");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
New->Other
Web->JSP File
例子省略
■SQLITE
http://www.sqlite.org/
sqlite 3.8.9
JDBC
https://bitbucket.org/xerial/sqlite-jdbc/downloads
sqlite3.exe testdb.sqlite
CREATE TABLE userinfo(
userid VARCHAR(10) PRIMARY KEY,
status INTEGER NOT NULL
);
INSERT INTO userinfo(userid, status) VALUES("aaaa1234", 0);
INSERT INTO userinfo(userid, status) VALUES("zzzz9876", 2);
select * FROM userinfo;
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("org.sqlite.JDBC");
conn = DriverManager.getConnection("jdbc:sqlite:C:/sqlite/testdb.sqlite");
stmt = conn.createStatement();
rs = stmt.executeQuery("SELECT userid,status FROM userinfo");
resp.setContentType("text/plain");
while (rs.next()) {
resp.getWriter().write("userid=" + rs.getString("userid") + ", ");
resp.getWriter().write("status=" + rs.getString("status") + "\n");
}
} catch(Exception e) {
e.printStackTrace();
} finally {
if (rs != null ) { try {rs.close(); } catch (SQLException e) {e.printStackTrace();} }
if (stmt != null ) { try {stmt.close(); } catch (SQLException e) {e.printStackTrace();} }
if (conn != null ) { try {conn.close(); } catch (SQLException e) {e.printStackTrace();} }
}
■Mysql
CREATE TABLE userinfo(
userid VARCHAR(10) PRIMARY KEY,
status INTEGER NOT NULL
)
ENGINE=InnoDB
;
INSERT INTO userinfo(userid, status) VALUES("aaaa1234", 0);
INSERT INTO userinfo(userid, status) VALUES("zzzz9876", 2);
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://192.168.11.187/sampledb?user=username&password=xxxxx");
stmt = conn.createStatement();
rs = stmt.executeQuery("SELECT userid,status FROM userinfo");
response.setContentType("text/plain");
while (rs.next()) {
response.getWriter().write("userid=" + rs.getString("userid") + ", ");
response.getWriter().write("status=" + rs.getString("status") + "\n");
}
} catch(Exception e) {
e.printStackTrace();
} finally {
if (rs != null ) { try {rs.close(); } catch (SQLException e) {e.printStackTrace();} }
if (stmt != null ) { try {stmt.close(); } catch (SQLException e) {e.printStackTrace();} }
if (conn != null ) { try {conn.close(); } catch (SQLException e) {e.printStackTrace();} }
}
（完）