[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; %2wr%*h
} H +'6*akV
int i1=l; |\2>n!
int i2=mid+1; vBzUuX
for(int cur=l;cur<=r;cur++){ qv^P
if(i1==mid+1) nW)?cQ I
data[cur]=temp[i2++]; AL!ppi
else if(i2>r) sZI"2[bk
data[cur]=temp[i1++]; 0qINa:Ori
else if(temp[i1] data[cur]=temp[i1++]; EXMW,
else >?O?U=:<
data[cur]=temp[i2++]; IClw3^\l
} IR:GoD+
} 7Kf
i#98KzE
} oam$9 q
s"@}^ )*}
改进后的归并排序: yg.o?eML
5tyA{&Ao
package org.rut.util.algorithm.support; $K.DLqDt
ZC]|s[
import org.rut.util.algorithm.SortUtil; NH;e|8
/qKA1-R}4
/** `dw">z,
* @author treeroot egK~w8`W%
* @since 2006-2-2 "cyRzQ6EH
* @version 1.0 iX o(
*/ -AD@wn!wCJ
public class ImprovedMergeSort implements SortUtil.Sort { uwQgu!|x
_TLspqi
private static final int THRESHOLD = 10; Nw9@E R
E[WU
/* #.rkvoB0N
* (non-Javadoc) idB1%?<
* oi m7=I0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wmww7
*/ \q?^DI:`
public void sort(int[] data) { 8 :WN@
int[] temp=new int[data.length]; w$IUm_~waa
mergeSort(data,temp,0,data.length-1); Fv7]1EO.
} [n2zdiiBd
V~VUl)
private void mergeSort(int[] data, int[] temp, int l, int r) { (/2rj[F&
int i, j, k; ep~+]7\
int mid = (l + r) / 2; ber&!9
if (l == r) @<3E`j'p
return; tA^+RO4
if ((mid - l) >= THRESHOLD) T$`m!mQ4
mergeSort(data, temp, l, mid); S{?l/*Il*_
else Ell14Iki
insertSort(data, l, mid - l + 1); 'z^'+}iyv
if ((r - mid) > THRESHOLD) Ypl;jkHP
mergeSort(data, temp, mid + 1, r); ^^&H:q
else LtH j
insertSort(data, mid + 1, r - mid); -<g[P_#
e`co:HO`#
for (i = l; i <= mid; i++) { e/cHH34
temp = data; `+T 2IPN
} <o9AjASv\,
for (j = 1; j <= r - mid; j++) { $@@ii+W}\
temp[r - j + 1] = data[j + mid]; :-O$rm
} 'j*Q
int a = temp[l]; qH0JZdk
int b = temp[r]; 3b\s;!
for (i = l, j = r, k = l; k <= r; k++) { ;e*okYM
if (a < b) { 4evNZ Q
data[k] = temp[i++]; (V&8 WN
a = temp; pj<aMh
} else { 2Y%7.YX"
data[k] = temp[j--]; lX%-oRQ/os
b = temp[j]; { TI,|'>5[
} +_/ys!
} L){V(*K '
} c]Gs{V]\
2z*}fkJ
/** @`)>-k
* @param data gm pY[
* @param l `*[\b9>
* @param i jI'?7@32`
*/ vmEn$`&2t
private void insertSort(int[] data, int start, int len) { 4lR+nmAZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kkfBVmuW
} k-a1^K3
} I{[}1W3]W
} `k>C%6FG$#
} g)\Tex<
Op8Gj `
堆排序： b+q'xnA=>
*^Zt)U1$|
package org.rut.util.algorithm.support; Kp*3:XK
NC!B-3?x
import org.rut.util.algorithm.SortUtil; ,"5HJA4
T[^&ZS]s
/** 4CchE15
* @author treeroot 34X]b[^
* @since 2006-2-2 jygUf|
* @version 1.0 2q]ZI
*/ Zyr|J!VF
public class HeapSort implements SortUtil.Sort{ n-SO201[*
QVRQUd
/* (non-Javadoc) #'O9Hn({
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8\9W:D@"x
*/ b:'8_jL
public void sort(int[] data) { (1q(6!
MaxHeap h=new MaxHeap(); ftcLP
h.init(data); Ip`1Wv_
for(int i=0;i h.remove(); 5x|$q kI
System.arraycopy(h.queue,1,data,0,data.length); p#Po?
} Q=d:Yz":S
)X," NJG
private static class MaxHeap{ @{{L1[~:0
I L7kpH+y
void init(int[] data){ QHja4/
this.queue=new int[data.length+1]; fd #QCs
for(int i=0;i queue[++size]=data; xjF>AAM_Px
fixUp(size); ~:k r;n2
} )7!,_r
} TghT{h@
<$hv{a
private int size=0; 4YI6&
c%O97J.5b
private int[] queue; @YRy)+
3QKBuo
public int get() { ]@cI_n
return queue[1]; ZvQZD=,F
} 7Y-Q, ?1
w0@XJH:P
public void remove() { #g@4c3um|
SortUtil.swap(queue,1,size--); ~3Pp}eO~V
fixDown(1); <,it<$f#
} >Ik%_:CC`
file://fixdown cUP1Uolvn
private void fixDown(int k) { o\ce|Dzt
int j; IY6Qd4157
while ((j = k << 1) <= size) { (w2lVL&
if (j < size %26amp;%26amp; queue[j] j++; ^tSwAanP\
if (queue[k]>queue[j]) file://不用交换 h?;03>6A&]
break; A@?-"=h}
SortUtil.swap(queue,j,k); x4>"m(&%
k = j; -6WSYpHV
} AxH`4=3<
} BMQ4i&kF|
private void fixUp(int k) { J=8Y D"1
while (k > 1) { z>0$SBQ-
int j = k >> 1; J!RRG~
if (queue[j]>queue[k]) }@jJv||
break; rNicg]:\x
SortUtil.swap(queue,j,k); ">_|!B&wb^
k = j; ^K::g)
} O(-6Zqk8Q
} ^8bc<c:P
>'=9sCi
} %Qb}z@>fJk
D3,)H%5.y
} G9xO>Xp^Al
ZwY mR=
SortUtil： yK9EHJ$
%XBTN
package org.rut.util.algorithm; N"RPCd_
XYD-5pG
import org.rut.util.algorithm.support.BubbleSort; J#j3?qrxu
import org.rut.util.algorithm.support.HeapSort; <Piq?&VX[
import org.rut.util.algorithm.support.ImprovedMergeSort; ZybfqBTD&c
import org.rut.util.algorithm.support.ImprovedQuickSort; Wl=yxJu_(
import org.rut.util.algorithm.support.InsertSort; TG8U=9qt
import org.rut.util.algorithm.support.MergeSort; vfj{j= G
import org.rut.util.algorithm.support.QuickSort; *kZH~]
import org.rut.util.algorithm.support.SelectionSort; (4RtoYWW
import org.rut.util.algorithm.support.ShellSort; 7!(/7U6rP
-qvMMit%7
/** dT&u}o3X
* @author treeroot q^6#.}
* @since 2006-2-2 N}[!QE
* @version 1.0 hyJ&~i0P{J
*/ ToKG;Ff4b
public class SortUtil { w'_|X&@H
public final static int INSERT = 1; fWWB]h
public final static int BUBBLE = 2; m+7%]$
public final static int SELECTION = 3; ts_|7Ev
public final static int SHELL = 4; xT* 3QwK
public final static int QUICK = 5; ?-o_]!*v0/
public final static int IMPROVED_QUICK = 6; )h>dD
public final static int MERGE = 7; dblf,x
public final static int IMPROVED_MERGE = 8; ^jb;4nf
public final static int HEAP = 9; ndT_;==
^?\|2H
public static void sort(int[] data) { 9An\uH)mL
sort(data, IMPROVED_QUICK); ?li/mc.XG
} ]Lg~I#/#
private static String[] name={ ZQir?1=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )K::WqR%w)
}; O[L#|_BnEO
HE_UHv
private static Sort[] impl=new Sort[]{ B]b/(Q+
new InsertSort(), z0a`*3 -2
new BubbleSort(), }M"])B I
new SelectionSort(), 'qde#[VB
new ShellSort(), :kE*
new QuickSort(), Y}q~Km
new ImprovedQuickSort(), hMvJNI6O
new MergeSort(), LH @B\ mS
new ImprovedMergeSort(), n"}*C|(k
new HeapSort() bUM4^m
}; 5A5t
MT)q?NcG
public static String toString(int algorithm){ I1s= =
return name[algorithm-1]; Jy"\_Vvl
} 20haA0s
yt,Ky8y1
public static void sort(int[] data, int algorithm) { U7g,@/Qx
impl[algorithm-1].sort(data); q(R|3l^6T
} w@6y.v1I{
eTw9c }[
public static interface Sort { ieWXr4@:
public void sort(int[] data); ,!,M'<?"
} =oiz@Q@H
y0?HZ Xq
public static void swap(int[] data, int i, int j) { (|<+yQ,@>
int temp = data; cH:&S=>h
data = data[j]; kz("LI]
data[j] = temp; 'L9hM.+
} +eKLwM
} #4"eQ*.*"