web.xml
<?xml version="1.0" encoding="UTF-8"?>ajaxcase-day02
index.html
index.htm
index.jsp
default.html
default.htm
default.jsp
helloservlet
com.servlet.HelloServlet
helloservlet
/hello.do
checkservlet
com.servlet.CheckServlet
checkservlet
/check.do
loadcityservlet
com.servlet.LoadCityServlet
loadcityservlet
/loadcities.do
City.java
package com.entity;
import java.io.Serializable;
public class City implements Serializable{
private int id;
private String name;
//带参数构造器
public City(int id, String name) {
super();
this.id = id;
this.name = name;
}
// public int getNumber(){
// return 1000;
// }
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
HelloServlet.java
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class HelloServlet extends HttpServlet{
@Override
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
System.out.println(“进入HelloServlet…”);
//响应输出一个text字符串信息
PrintWriter out = response.getWriter();
out.print(“Hello Ajax”);
out.close();
}
}
CheckServlet.java
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class CheckServlet extends HttpServlet{
@Override
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
//获取请求参数name值
request.setCharacterEncoding(“utf-8”);
String name = request.getParameter(“name”);
System.out.println(“用户输入:”+name);
//模拟延迟
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
//判断name值
response.setContentType(“text/html;charset=utf-8”);
PrintWriter out = response.getWriter();
if(“scott”.equals(name)){
out.print(“用户名被占用”);
}else{
out.print(“用户名可用”);
}
out.close();
}
}
LoadCityServlet.java
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.entity.City;
import net.sf.json.JSONArray;
public class LoadCityServlet extends HttpServlet{
@Override
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
System.out.println(“进入LoadCityServlet…”);
response.setContentType(“text/html;charset=utf-8”);
PrintWriter out = response.getWriter();
//out.print(“1:北京;2:上海;3:深圳”);//【1】
//[{“id”:1,“name”:“北京”},{“id”:2,“name”:“上海”},{“id”:3,“name”:“天津”}]
// String data =
// “[{“id”:1,“name”:“北京”},”
// + “{“id”:2,“name”:“上海”},”
// + “{“id”:3,“name”:“天津”}]”;//【2】
// System.err.println(data);
// out.print(data);
//获取数据
List list = getCities();
//将数据转成JSON字符串
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