[JAVA]用Java实现的各种排序

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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; "(~^w=d:$
} <uw9DU7G
int i1=l; 7'V@+5
int i2=mid+1; ZDYJ\}=
for(int cur=l;cur<=r;cur++){ >uhaW@d
if(i1==mid+1) K`zdc`/
data[cur]=temp[i2++]; m@v\(rT.
else if(i2>r) IK=a*}19L
data[cur]=temp[i1++]; /]Md~=yNp
else if(temp[i1] data[cur]=temp[i1++]; h2]P]@nW;W
else SsDmoEeB[
data[cur]=temp[i2++]; ~IBP|)WA-
} qiBVGH
} :>f )g
@,7GaK\
} FbFPJ !fb
37.S\gO]
改进后的归并排序: K;H&n1
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package org.rut.util.algorithm.support; rcG"o\g@+
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import org.rut.util.algorithm.SortUtil; u^I|T.w<r6
j-}O0~Jz
/** 29] G^f>
* @author treeroot e2oa($9
* @since 2006-2-2 oY3;.;'bk
* @version 1.0 fxHH;hRfv
*/ 0 ZKx<]!
public class ImprovedMergeSort implements SortUtil.Sort { $Sip$\+*
<=/hil
private static final int THRESHOLD = 10; R.1.)P[
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/* 21l;\W
* (non-Javadoc) :J&oX <nF^
* z,p~z*4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0pd'93C
*/ 3~{:`[0Q
public void sort(int[] data) { p6Gy,C.
int[] temp=new int[data.length]; []1C$.5DD
mergeSort(data,temp,0,data.length-1); *P=VFP
} E4/Dr}4
;'@9[N9
private void mergeSort(int[] data, int[] temp, int l, int r) { ~HsJUro
int i, j, k; N5 6g+,w%)
int mid = (l + r) / 2; }(73Syl#
if (l == r) 3;A)W18]
return; }9OC,Y8?D
if ((mid - l) >= THRESHOLD) j6 z^Tt12
mergeSort(data, temp, l, mid); &@OT*pNna
else x g
insertSort(data, l, mid - l + 1); vXZOy%$o
if ((r - mid) > THRESHOLD) ;dgp+
mergeSort(data, temp, mid + 1, r); 7[XRd9a5(
else +\ .Lp 5
insertSort(data, mid + 1, r - mid); Qe:seW
CkQ3#L<2
for (i = l; i <= mid; i++) { >0TxUc_va
temp = data; Feq]U?
} o3P${Rq
for (j = 1; j <= r - mid; j++) { h3 }OX{k
temp[r - j + 1] = data[j + mid]; ?%[@Qb=2
} BW*rIn<?G
int a = temp[l]; "@0]G<H
int b = temp[r]; +iRh
for (i = l, j = r, k = l; k <= r; k++) { f6>b|k~
if (a < b) { JL{VD /f
data[k] = temp[i++]; Lk}J8 V^2
a = temp; VuZuS6~#J
} else { g1"kTh
data[k] = temp[j--]; Dp-z[]})1
b = temp[j]; ]Q)OL
} #.)0xfGW)n
} TKmf+ZT*r
} -k e's
'zuIBOH`j3
/** 1\2no{Vh
* @param data >U27];}y
* @param l R$[vm6T?
* @param i >!1-lfa8
*/ vV-`jsq20H
private void insertSort(int[] data, int start, int len) { w%jII{@,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A#iV=76_
} ]jp6k<KF
} 1K50Z.o&@
} Y&Z.2>b
} GH$pKB
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堆排序： #?- wm
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package org.rut.util.algorithm.support; P{lB50
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import org.rut.util.algorithm.SortUtil; G3AesTT|
M gi,$H
/** H8}oIA"b
* @author treeroot X2~!(WxU F
* @since 2006-2-2 =^,m` _1
* @version 1.0 N2<!}Eyu
*/ mGg+.PFsM
public class HeapSort implements SortUtil.Sort{ K_Eux rPn
5MJS ~(
/* (non-Javadoc) #BH*Z(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ry6@VQ"NLb
*/ {8bSB.?R
public void sort(int[] data) { ^>v+( z5R
MaxHeap h=new MaxHeap(); pB0 \\wR
h.init(data); ^WWQI+pk
for(int i=0;i h.remove(); TJXT-\Vk
System.arraycopy(h.queue,1,data,0,data.length); w@w(-F!%l
} U26}gT)
5vnrA'BhBU
private static class MaxHeap{ 4zFW-yy
@?]RBX?a
void init(int[] data){ A;?|&`f
this.queue=new int[data.length+1]; RPL:-
for(int i=0;i queue[++size]=data; #5o(h+w)
fixUp(size); QD]6C2j*
} ]Gq !`O1
} ml }{|Yz
z9Rp`z&`E
private int size=0; 3eQ&F~S
YNsJZnGr8#
private int[] queue; $kp{Eg '
hZt!/?dc
public int get() { Bh-ym8D
return queue[1]; %:* YO;dw'
} :&."ttf=
tf`^v6m%]
public void remove() { ds[|
SortUtil.swap(queue,1,size--); d5:c^`
fixDown(1); j*r{2f4Rt
} !'*-$e
file://fixdown c(s.5p ^
private void fixDown(int k) { xMG~N`r
int j; T{[=oH+
while ((j = k << 1) <= size) { WCixKYq
if (j < size %26amp;%26amp; queue[j] j++; g{&ui.ml&
if (queue[k]>queue[j]) file://不用交换 ^.QzQ1=D
break; k~1?VQ+?M
SortUtil.swap(queue,j,k); #!+:!_45
k = j; 3L}A3de'
} St*h>V6
} PB\x3pV!}
private void fixUp(int k) { u.xnOcOH!
while (k > 1) { \(2sW^fY
int j = k >> 1; sD#.Oq4&]y
if (queue[j]>queue[k]) oW6XF-yM
break; Wg]Qlw`\|
SortUtil.swap(queue,j,k); 9CD_os\h
k = j; Y`a3tO=Pd
} {F.[&/A
} ye5&)d"fa(
E$p+}sP(C
} *b\t#meS&
I9ep`X6Y
} &gx%b*;`L0
Qq|57X)P*
SortUtil： f(MO_Sj]
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package org.rut.util.algorithm; 2g! +<YZ~
j|#Bo:2km
import org.rut.util.algorithm.support.BubbleSort; 9p(.A$
import org.rut.util.algorithm.support.HeapSort; %._.~V
import org.rut.util.algorithm.support.ImprovedMergeSort; H"WprHe
import org.rut.util.algorithm.support.ImprovedQuickSort; c9h6C
import org.rut.util.algorithm.support.InsertSort; Wvf ^N(
import org.rut.util.algorithm.support.MergeSort; c\AfaK^KF
import org.rut.util.algorithm.support.QuickSort; ;u)I\3`*!
import org.rut.util.algorithm.support.SelectionSort; 1bX<$>x9u
import org.rut.util.algorithm.support.ShellSort; |@4' <4t
7hPY_W y
/** zy }$i?
* @author treeroot v`1M[
* @since 2006-2-2 1p=]hC
* @version 1.0 xU`p|(SS-
*/ H9e<v4c
public class SortUtil { {R6ZKB
public final static int INSERT = 1; $6SW;d+>n
public final static int BUBBLE = 2; 1]b.fD
public final static int SELECTION = 3; v` 1lxX'*
public final static int SHELL = 4; rFL;'Cj@
public final static int QUICK = 5; t1x1,SL
public final static int IMPROVED_QUICK = 6; YUk\Q%
public final static int MERGE = 7; TarY|P7_
public final static int IMPROVED_MERGE = 8; 1iF1GkLEq
public final static int HEAP = 9; pYf-S?Y/V
Qzw;i8n{
public static void sort(int[] data) { /mzlH
sort(data, IMPROVED_QUICK); NTs aW}g
} P5ywhw-
private static String[] name={ 3(80:@|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f4|rVP|x
}; qUb&
t"oeQ*d%
private static Sort[] impl=new Sort[]{ 92oFlEJ
new InsertSort(), 8KzkB;=n
new BubbleSort(), L.JT[zOfb
new SelectionSort(), h<<v^+m
new ShellSort(), K]w'&Qm8W
new QuickSort(), T]~xj4
new ImprovedQuickSort(), pTLCWbF?
new MergeSort(), 6.yu-xm
new ImprovedMergeSort(), x7 ,5
new HeapSort() tc_3sC7jN
}; - 1gVeT&
.(k|wX[Fu~
public static String toString(int algorithm){ %d9uTm;
return name[algorithm-1]; >i?oC^QM
} O?#7N[7
@`9]F7h5W
public static void sort(int[] data, int algorithm) { wN~_v-~*Q
impl[algorithm-1].sort(data); .HABNPNg(
} 7s^'d,P
~((O8@}J
public static interface Sort { {]4LULq
public void sort(int[] data); sK?twg;D*|
} l+0oS'`V*L
BnF^u5kv%
public static void swap(int[] data, int i, int j) { I{=Qtnlb
int temp = data; Nu)NqFG,
data = data[j]; =Nr-iae#
data[j] = temp; g*+>H1}
} N4TV
} (X*^dO