[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; "#pzZ)Zh
} i_u {5 U;
int i1=l; ALd]1a&
int i2=mid+1; t<sNc8x
for(int cur=l;cur<=r;cur++){ &xiOTkqB
if(i1==mid+1) ;cI#S%uvpn
data[cur]=temp[i2++]; i-,D_
else if(i2>r) d=XpO*v,[
data[cur]=temp[i1++]; 't(}Rq@
else if(temp[i1] data[cur]=temp[i1++]; UP;Q=t
else A XBkJ'jd
data[cur]=temp[i2++]; hOPe^e"
} d(fPECv(
} gF[6c`-s
M!gBmQZ1
} mz\NFC<
R-pH Quu3
改进后的归并排序: u 1ZJHry
mX&xn2}qZ"
package org.rut.util.algorithm.support; h2wN<dJCM
JI"/N`-?;b
import org.rut.util.algorithm.SortUtil; r<*O
l"J*)P
/** 6F`qi:a+
* @author treeroot #JA}LA"l
* @since 2006-2-2 5"JU?e59M
* @version 1.0 2{ o0@
*/ c>ad0xce6
public class ImprovedMergeSort implements SortUtil.Sort { p jKt:R}
y"^yYO
private static final int THRESHOLD = 10; (0i'Nb"
}:`5,b%Y_
/* V+lRi"m?|
* (non-Javadoc) w[(n>
* FY]pv6@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5YiZ-CQ>
*/ _Vjpw,
public void sort(int[] data) { GQN98Y+h
int[] temp=new int[data.length]; lhqQCV
mergeSort(data,temp,0,data.length-1); XRa(sXA3
} z%V*K
eZg$AOpU
private void mergeSort(int[] data, int[] temp, int l, int r) { EeCFII
int i, j, k; v&fGCD\R
int mid = (l + r) / 2; pOm@b`S%
if (l == r) rA,CQypo
return; Xv0F:1
if ((mid - l) >= THRESHOLD) D?e"U_
mergeSort(data, temp, l, mid); +W9]ED
else %3M95UZ2
insertSort(data, l, mid - l + 1); TPHYz>D]
if ((r - mid) > THRESHOLD) |olNA*4
mergeSort(data, temp, mid + 1, r); !!FR[NK
else 9\v.qo.
insertSort(data, mid + 1, r - mid); ~m=$VDWm
.Y1bY:=
for (i = l; i <= mid; i++) { :NuR>~
temp = data; ga-{!$b*
} tBseqS3<
for (j = 1; j <= r - mid; j++) { a/~29gW8E\
temp[r - j + 1] = data[j + mid]; ="\*h(
} W;q+,Io
int a = temp[l]; Q',m{;;
int b = temp[r]; EX:{EmaT
for (i = l, j = r, k = l; k <= r; k++) { )1f+ld%R
if (a < b) { o/cr{>"N
data[k] = temp[i++]; nq'M?c#E
a = temp; R:A'&;S
} else { I!0JG`&
data[k] = temp[j--]; HA!t$[_Ve
b = temp[j]; 0Uw ^FcW
} WSLy}@`Vx
} :uo[&&c
} EKuSnlTXba
IIxJqGN:
/** e_/x&a(i8
* @param data s~J=<)T*6
* @param l T~X41d\
* @param i q#NR32byF
*/ aG! *WHt
private void insertSort(int[] data, int start, int len) { Ky kSFB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xc;DdK=1X
} >,"sHm}l%
} ,=|4:F9
} ` W4dx&
} rjUBLY1(
V^n0GJNo
堆排序： JrDHRIkgm
+8AvTSgX%
package org.rut.util.algorithm.support; *Y%Jl o
n'K6vW3
import org.rut.util.algorithm.SortUtil; FLZSK:3B]
J &YQ]l
/** =g~W%})
* @author treeroot +tt9R_S
* @since 2006-2-2 zAs&%OjG
* @version 1.0 X|b2c+I
*/ Oz{%k#X-
public class HeapSort implements SortUtil.Sort{ #Fs|f3-@
&[_ZXVva~
/* (non-Javadoc) dl0FQNz8@B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XP-C
*/ |]W2EV ,b
public void sort(int[] data) { #?Mj$ZB
MaxHeap h=new MaxHeap(); k4{:9zL1#?
h.init(data); B +Aj*\Y.
for(int i=0;i h.remove(); J8<J8x4
System.arraycopy(h.queue,1,data,0,data.length); y-9+a7j
} PKf:O
exDkq0u]
private static class MaxHeap{ qu~X.pW
zizk7<?L.
void init(int[] data){ lY'N4x7n
this.queue=new int[data.length+1]; 5~+XZA#2
for(int i=0;i queue[++size]=data; XErUS80
fixUp(size); ?Elg?)os
} V8PLFt;
} "DQ'C%sL9
^Ga&}-
private int size=0; %=Tr^{i
;..o7I
private int[] queue; 1] #9
K |*5Kwi
public int get() { 3yV'XxC
return queue[1]; j~`\XX{>
} {]kaJ{U>
U)D[]BVg
public void remove() { -5bA $
SortUtil.swap(queue,1,size--); rmd;\)#*`
fixDown(1); P)6lu8zQ
} H&4~Uo.5
file://fixdown Rc[0aj:
private void fixDown(int k) { zY=jXa)K~
int j; OH6^GPF6
while ((j = k << 1) <= size) { &@v<nO-
if (j < size %26amp;%26amp; queue[j] j++; t'1Y@e
if (queue[k]>queue[j]) file://不用交换 YF[f Z
break; ^6;V}2>v}
SortUtil.swap(queue,j,k); 3l4NC03I&
k = j; Tum_aI
} g|%L"-%gJ
} C#Bz>2;#
private void fixUp(int k) { |<qs
while (k > 1) { +dW|^I{H}
int j = k >> 1; L":bI&V?:
if (queue[j]>queue[k]) DN8}glVxV
break; ~i0R^qfr
SortUtil.swap(queue,j,k); / T c=
k = j; |/`%3'4H
} ,EpH4*e
} A??@AP[7M
}#`:Qb \U
} Y[ zZw~yx
r&3pM2Da}
} r"{<%e
pyZ9OA!PD
SortUtil： =!b6FjsiG
6^)}PX= *
package org.rut.util.algorithm; gTf|^?vd
oPQtGl p
import org.rut.util.algorithm.support.BubbleSort; 9X}I>
import org.rut.util.algorithm.support.HeapSort; G"dS+,Q
import org.rut.util.algorithm.support.ImprovedMergeSort; J CGC
import org.rut.util.algorithm.support.ImprovedQuickSort; Y&.UIosWb
import org.rut.util.algorithm.support.InsertSort; {b)~V3rsY
import org.rut.util.algorithm.support.MergeSort; )2e#HBnH
import org.rut.util.algorithm.support.QuickSort; |L6&Gf]#5
import org.rut.util.algorithm.support.SelectionSort; S:bC[}
import org.rut.util.algorithm.support.ShellSort; aelO3'UN
_5Bcwa/
/** &^".2)zU
* @author treeroot O;9?(:_
* @since 2006-2-2 !Ng=Yk>3
* @version 1.0 ~P*4V]L^
*/ /t%u"dP"T~
public class SortUtil { O9M{ ).
public final static int INSERT = 1; 0s#Kp49-
public final static int BUBBLE = 2; 9N8I ip]w
public final static int SELECTION = 3; M8&}j
public final static int SHELL = 4; MCTsi:V>+
public final static int QUICK = 5; s)J(/
public final static int IMPROVED_QUICK = 6; #qBr/+b
public final static int MERGE = 7; nY%5cJ`"
public final static int IMPROVED_MERGE = 8; p#P~Q/;
public final static int HEAP = 9; |N/G'>TS
BUZ _)
public static void sort(int[] data) { w'Tq3-%V
sort(data, IMPROVED_QUICK); K2)!h.W
} lSwcL
private static String[] name={ ,:Z^$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *e>]~Z,
}; 7[#yu2
A^\.Z4=d"
private static Sort[] impl=new Sort[]{ 4u;9J*r4
new InsertSort(), */qtzt
new BubbleSort(), 4,Ic}CvM
new SelectionSort(), \nNXxTxX!
new ShellSort(), dihjpI_
new QuickSort(), |SZo' 6
new ImprovedQuickSort(), tRb]7 z
new MergeSort(), 1{x.xi"A/
new ImprovedMergeSort(), SLL3v,P(7
new HeapSort() /1UOT\8U
}; }L=/A7Nk>
N"tFP9;K
public static String toString(int algorithm){ BR`ygrfe
return name[algorithm-1]; f|7\DeY9U
} #N(= 3Cj
9m2, qr|
public static void sort(int[] data, int algorithm) { M9\#Aq&\i
impl[algorithm-1].sort(data); }|OaL*|u
} >et-{(G
*iO u'
public static interface Sort { enS}A*Io
public void sort(int[] data); s8"8y`u
} {P%9
u7%D6W~m0
public static void swap(int[] data, int i, int j) { IY'=DePd
int temp = data; `>Tu|3%\
data = data[j]; tc;'oMUP
data[j] = temp; Qj{8?lew
} |~`as(@Ih
} +d}E&=p_