[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; 7=yV8.cD
} ,e\'Y!'
int i1=l; *@6,Sr)_
int i2=mid+1; )/VhkSXbG!
for(int cur=l;cur<=r;cur++){ 67Z@Hg
if(i1==mid+1) 5~GHAi
data[cur]=temp[i2++]; #6O<!{PH6
else if(i2>r) 1#rcxUSi
data[cur]=temp[i1++]; .bcoH
else if(temp[i1] data[cur]=temp[i1++]; Y*0AS|r!
else +o+e*B7Eh
data[cur]=temp[i2++]; [Q(FBoI|
} 49S*f
} GG0l\!2)
0X6|pC~
} rqJ'm?>cr
:&*Y Io
改进后的归并排序: 8nCw1
fyYHwG
package org.rut.util.algorithm.support; g}(yq:D
V`*N2ztSL
import org.rut.util.algorithm.SortUtil; AAbI+L0m{
(`C#Tq
/** PuyJ:#a
* @author treeroot ko-|hBNv
* @since 2006-2-2 OCR`1
* @version 1.0 &sh5|5EC
*/ H?-Byi
public class ImprovedMergeSort implements SortUtil.Sort { $7k"?M_
-!_f-Nny
private static final int THRESHOLD = 10; qfJi[8".
bs_>!H1
/* 4^4<Le-G
* (non-Javadoc) Udj!y$?
* fC6zDTis8A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z?T;2/_7
*/ 6T*MKu
public void sort(int[] data) { ^y" #2Ov
int[] temp=new int[data.length]; &Pk #v
mergeSort(data,temp,0,data.length-1); uY6]rt_#a
} X/< zxM
)\nKr;4MH
private void mergeSort(int[] data, int[] temp, int l, int r) { L!:8yJK
int i, j, k; {J#SpG 7
int mid = (l + r) / 2; T'VZ=l[
if (l == r) JATW'HWC|I
return; {owXyQ2mK
if ((mid - l) >= THRESHOLD) e@6]rl
mergeSort(data, temp, l, mid); 5"~F#vt
else 8PKUg "p
insertSort(data, l, mid - l + 1); 80(Olf@PE
if ((r - mid) > THRESHOLD) Z5x&P_.x[
mergeSort(data, temp, mid + 1, r); RCZ"BxleU
else r{+P2MPW
insertSort(data, mid + 1, r - mid); Jd]kg,/
pl#2JA8
for (i = l; i <= mid; i++) { !{u`}:\
temp = data; l\f /(&,
} Nuc;Y
for (j = 1; j <= r - mid; j++) { \mK;BWg)
temp[r - j + 1] = data[j + mid]; aMU0BS"
} .wH`9aq;5@
int a = temp[l]; <'y}y}%
int b = temp[r]; xh6Yv%\@
for (i = l, j = r, k = l; k <= r; k++) { `kE ;V!n?
if (a < b) { uU$YN-
data[k] = temp[i++]; #)3luf3G
a = temp; HB|R1<t;HB
} else { io&FW!J.
data[k] = temp[j--]; JxP&znng
b = temp[j]; dG8_3T}i
} ww? AGd
} Jy^.L$bt
} .ei5+?V<i
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/** $O'IbA
* @param data ;!~&-I0l
* @param l 1hTE^\W
* @param i 1]&FB{l
*/ +,g3Xqs}X
private void insertSort(int[] data, int start, int len) { I$0O4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?Yf0h_>
} mJU1n
} 4Tdp;n\F
} 0<3->uK
} M)qb6aD0
!"d"3coQ?
堆排序： e 48N[p
C0K0c6A(4
package org.rut.util.algorithm.support; -~_[2u^3
urbSprdF
import org.rut.util.algorithm.SortUtil; <q`'[1Y4
&7J-m4BI
/** 6*&$ha}X
* @author treeroot m[}@\y
* @since 2006-2-2 0h-'TJg*sk
* @version 1.0 VbI$#;:[7
*/ o#K*-jOfiH
public class HeapSort implements SortUtil.Sort{ <B&vfKO^h
g\2/Ia+/@
/* (non-Javadoc) gyz_$T@x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dW5@Z-9
*/ 11iV{ h
public void sort(int[] data) { .du2;`[$r
MaxHeap h=new MaxHeap(); 0FcG;i+
h.init(data); Y@y"bjK \
for(int i=0;i h.remove(); ZLZh$eZZ
System.arraycopy(h.queue,1,data,0,data.length); QOR92}yC
} &_$0lIDQ
{ePtZyo0
private static class MaxHeap{ Nu;?})tF
HcQ)XJPK
void init(int[] data){ QJy1j~9x
this.queue=new int[data.length+1]; 2,6~;R
for(int i=0;i queue[++size]=data; 0N87G}Xu
fixUp(size); 3;JF5e\?x
} Q~f mVWq
} &+]-e;[
az1#:Go
private int size=0; o1Krp '*
d{Cg3v`Rd
private int[] queue; IhHKRb[
<Uy $b4h
public int get() { YU`}T<;bg
return queue[1]; 7<ZGNxZ~
} gHtflS
f hjlt#
public void remove() { H+ 7HD|GE
SortUtil.swap(queue,1,size--); y8ODoXk
fixDown(1); 8'ut[
} jf.WmiDC
file://fixdown $|tk?Sps
private void fixDown(int k) { rI OKCL?
int j; 2f0mr?l)N
while ((j = k << 1) <= size) { =pBr_pGz=
if (j < size %26amp;%26amp; queue[j] j++; H]}mg='kI
if (queue[k]>queue[j]) file://不用交换 '=`af>Nc
break; zZW5M^z8
SortUtil.swap(queue,j,k); !>#gm7
k = j; ;@*<M\O
} p}Um+I=1
} [Z2{S-)UM
private void fixUp(int k) { 8,IQ6Or|-2
while (k > 1) { 4F"%X&$
int j = k >> 1; 6:q,JB@i
if (queue[j]>queue[k]) )KY4BBc
break; o!lKP>
SortUtil.swap(queue,j,k); qu\U^F
k = j; h$#PboLd
} ;H3~r^>c
} rd;E /:`5
P]iJ"d]+X
} !"ir}Y%
H.;2o(vD
} 9^&B.6!6
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SortUtil： V|TD+7.`QB
jNI9 .45y
package org.rut.util.algorithm; w9StW94p
+k h Tl:
import org.rut.util.algorithm.support.BubbleSort; d)3jkHYEjj
import org.rut.util.algorithm.support.HeapSort; !ALq?u
import org.rut.util.algorithm.support.ImprovedMergeSort; O6,2M[a
import org.rut.util.algorithm.support.ImprovedQuickSort; _kc}:
import org.rut.util.algorithm.support.InsertSort; &7,::$cu
import org.rut.util.algorithm.support.MergeSort; [Op^l%BC
import org.rut.util.algorithm.support.QuickSort; )5`~WzA
import org.rut.util.algorithm.support.SelectionSort; 4M!wm]n/%5
import org.rut.util.algorithm.support.ShellSort; uzI-1@`
XgyLlp;,O
/** 4:Oq(e_(
* @author treeroot OrF.wcg
* @since 2006-2-2 Cd]g+R}j
* @version 1.0 :*/g~y(fE
*/ B6j/"x6N15
public class SortUtil { ]4r&Q4d>O
public final static int INSERT = 1; c_>AbF{
public final static int BUBBLE = 2; j"jQiL_*
public final static int SELECTION = 3; xLb=^Xjec
public final static int SHELL = 4; (5A8#7a
public final static int QUICK = 5; F-F1^$]k
public final static int IMPROVED_QUICK = 6; H]W'mm
public final static int MERGE = 7; Ct^=j@g
public final static int IMPROVED_MERGE = 8; ,:#h;4!VRF
public final static int HEAP = 9; a*t @k*d_
r7#.DJnN.
public static void sort(int[] data) { W56VA>ia
sort(data, IMPROVED_QUICK); >l #D9%
} Q{5.;{/eC
private static String[] name={ RUq[HxF) 6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K%_UNivN
}; .2U3_1dX
u9(42jj[$U
private static Sort[] impl=new Sort[]{ $=X>5B
new InsertSort(), 0>46ZzxUZ
new BubbleSort(), b@Dt]6_UL
new SelectionSort(), cml~Oepf
new ShellSort(), k'*vG6!
new QuickSort(), ri-D#F)}
new ImprovedQuickSort(), h:|BQC
new MergeSort(), :0ltq><?
new ImprovedMergeSort(), (sI`FW_
new HeapSort() hT,rcIkg:
}; '? -N
>j7]gi(
public static String toString(int algorithm){ t3g+>U_m
return name[algorithm-1]; .beqfcj"
} `Kn+d~S4
)*R';/zaI
public static void sort(int[] data, int algorithm) { Jamt@=
impl[algorithm-1].sort(data); ho)JY $#6
} }I MV@z B
;y{(#X#
public static interface Sort { BPl% SL
public void sort(int[] data); "LH!Trl@k
} R^=v&c{@
ay||yn:
public static void swap(int[] data, int i, int j) { u.G aMl4 (
int temp = data; FhPCFmmUT
data = data[j]; wv\V&U$
data[j] = temp; $iMLT8U
} Qg]A^{.1
} !G6h~`[