[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; by06!-P0[
} _&z>Id`w
int i1=l; sJ?kp^!g
int i2=mid+1; W"Rii]GK"
for(int cur=l;cur<=r;cur++){ O.$<Bf9
if(i1==mid+1) nu3 A'E`'k
data[cur]=temp[i2++]; Z?x]HB`r
else if(i2>r) {[9^@k
data[cur]=temp[i1++]; WWO jyj
else if(temp[i1] data[cur]=temp[i1++]; TRq~n7Y7C
else !c&^b@ yw
data[cur]=temp[i2++]; *"4<&F S
} Rxli;blzi
} U=yD!
uo{QF5z]
} =az$WRV+7!
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改进后的归并排序: Fu`g)#Z
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package org.rut.util.algorithm.support; Q.|2/6hD7[
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import org.rut.util.algorithm.SortUtil; |-|BM'Y
A|&EI-In
/** VC+\RB#:-
* @author treeroot ;|^fAc~9{r
* @since 2006-2-2 *@ o3{0[Z
* @version 1.0 g/@CESfm'
*/ ?SAi tQ3
public class ImprovedMergeSort implements SortUtil.Sort { =['ijD4TW
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private static final int THRESHOLD = 10; ZV U9t
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/* dg!sRm1iZ:
* (non-Javadoc) UEeqk"t^
* bCrB'&^t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2<O8=I _
*/ f6"j-IW[z
public void sort(int[] data) { "L)pH@)
int[] temp=new int[data.length]; ES~]rPVS
mergeSort(data,temp,0,data.length-1); .Sn1YAhE
} f65Sr"qB3
Qh[t##I/
private void mergeSort(int[] data, int[] temp, int l, int r) { H xlw1(zS
int i, j, k; t}tKm
int mid = (l + r) / 2; 4Klfnki
if (l == r) l>iU Q&V
return; @bx2=
if ((mid - l) >= THRESHOLD) m\>x_:sE
mergeSort(data, temp, l, mid); x -!FS h8q
else ?gtkf[0B|
insertSort(data, l, mid - l + 1); L~$RF {$
if ((r - mid) > THRESHOLD) oN$ZZk R
mergeSort(data, temp, mid + 1, r); (NQ[AypMI
else e)7)~g54
insertSort(data, mid + 1, r - mid); cm3Y!p{p"
'SieZIm)
for (i = l; i <= mid; i++) { st2>e1vg
temp = data; e&5K]W0{
} (wfg84
for (j = 1; j <= r - mid; j++) { p\WUk@4
temp[r - j + 1] = data[j + mid]; 7S`H?},sR
} qcot T\rq
int a = temp[l]; a#IJ<^[8
int b = temp[r]; kC0!`$<2f)
for (i = l, j = r, k = l; k <= r; k++) { 8if"U xV(
if (a < b) { v(^rq
data[k] = temp[i++]; M<)2
a = temp; p(G?
} else { uS'ji k}
data[k] = temp[j--]; {<2ZbN?
b = temp[j]; |$t0cd
} =gIYa
} LTe7f8A
} w(j9[
=I(s7=Liu
/** hvyN8We
* @param data {P-PH$ E-
* @param l a)1,/:7'
* @param i b {5|2&=
*/ r2th6hl~
private void insertSort(int[] data, int start, int len) { 2z\F m/Z.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b{rmxtx
} RtL<hD
} ^ztf:'l@C
} 4.'EEuRw\}
} + LwoBn>6
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堆排序： *ls6#j@
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package org.rut.util.algorithm.support; o zYI/b^
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import org.rut.util.algorithm.SortUtil; o,yvi
S;'eoqN8
/** c)8wO=!
* @author treeroot EVFfXv^
* @since 2006-2-2 (UZ*36@PJx
* @version 1.0 u-_$?'l;~
*/ 7gwZ9Fob
public class HeapSort implements SortUtil.Sort{ 1l_}O1
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/* (non-Javadoc) ,#T3OA!c**
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zq.&Mw?
*/ ]3xa{h~4
public void sort(int[] data) { =]a@)6y
MaxHeap h=new MaxHeap(); %7#Zb'
h.init(data); {*<C!Qg
for(int i=0;i h.remove(); >Gu0&
System.arraycopy(h.queue,1,data,0,data.length); 1Ol]^'y7)
} ugB{2oqi
i=N\[&
private static class MaxHeap{ Wu( 8G
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void init(int[] data){ kZ9<j+.
this.queue=new int[data.length+1]; <6C9R>
for(int i=0;i queue[++size]=data; jtv Q<4
fixUp(size); ogqV]36Idh
} NE3wui1 V
} p*,P%tX
:XSc#H4
private int size=0; ^Nw]'e3
Jche79B
private int[] queue; o%%x'uC
i4n b#
public int get() { Oq,.Kz
return queue[1]; sjI[Vq
} /K) b0QX
|WU`p
public void remove() { nnL$m_K~
SortUtil.swap(queue,1,size--); oks=|'&
fixDown(1); Qz+d[%Q}x
} 9*;isMkq<
file://fixdown ;jU-<
private void fixDown(int k) { m5w9l"U]H
int j; YeC,@d[
while ((j = k << 1) <= size) { Y@H,Lk
if (j < size %26amp;%26amp; queue[j] j++; I`W-RWZ
if (queue[k]>queue[j]) file://不用交换 g[au-.:
break; >J3ja>Gw/
SortUtil.swap(queue,j,k); 0DB<hpC:5
k = j; BhW]Oq&
} |Xm4(FN\
} T[h}A"yK;
private void fixUp(int k) { -\'.JA_
while (k > 1) { qTHg[sME
int j = k >> 1; l5';?>!s
if (queue[j]>queue[k]) -ouJf}#R
break; kgI=0W>
SortUtil.swap(queue,j,k); @P"`=BU&
k = j; o+-Ge J
} >|/? Up
} on;sq8;
7G[ GHc>
} #)mkD4
[gkRXP[DGs
} ru/zLj:
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SortUtil： 4 uy@ {
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package org.rut.util.algorithm; y-<PsP-I
B:- KZuO
import org.rut.util.algorithm.support.BubbleSort; ?PE1aB+{:
import org.rut.util.algorithm.support.HeapSort; IEoR7:
import org.rut.util.algorithm.support.ImprovedMergeSort; ;}eEG{`Y
import org.rut.util.algorithm.support.ImprovedQuickSort; A,lw-(.z4Z
import org.rut.util.algorithm.support.InsertSort; &lh_-@Xz
import org.rut.util.algorithm.support.MergeSort; |:=b9kv
import org.rut.util.algorithm.support.QuickSort; 2x`xyR_Q.R
import org.rut.util.algorithm.support.SelectionSort; *KjVPs
import org.rut.util.algorithm.support.ShellSort; pmW6~%}*
_X%6+0M
/** H"FflmUO
* @author treeroot xeYySM=
* @since 2006-2-2 2gL[\/s
* @version 1.0 /ik)4]>
*/ jO&f*rxN
public class SortUtil { 9SH<d)^
public final static int INSERT = 1; Gp ^ owr
public final static int BUBBLE = 2; ;h-G3>Il
public final static int SELECTION = 3; DtF![0w/
public final static int SHELL = 4; =o{: -EKQF
public final static int QUICK = 5; 0(9I\j5`TT
public final static int IMPROVED_QUICK = 6; e(n2+S#N
public final static int MERGE = 7; RM^?&PM85
public final static int IMPROVED_MERGE = 8; or!D
public final static int HEAP = 9; ZU|V+yT
>OKS/(I0
public static void sort(int[] data) { BBU84s[
sort(data, IMPROVED_QUICK); R5NRCI
} 7<R6T9g
private static String[] name={ t|#NMRz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RRI>bh]
}; EAC(^+15K
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private static Sort[] impl=new Sort[]{ #>E3'5b
new InsertSort(), J"D&q
new BubbleSort(), XgiI6-B~
new SelectionSort(), ^;)SFmjg%
new ShellSort(), ]m/@wW9
new QuickSort(), "lU]tIpCu
new ImprovedQuickSort(), c;b[u:>~-
new MergeSort(), vbWJhjK0h
new ImprovedMergeSort(), 8V=HyF#
new HeapSort() v E3{H
}; !X\sQNp
0{"dI;b%
public static String toString(int algorithm){ } Jdh^t.
return name[algorithm-1]; (}*\ {
} F;?TR[4!k
(EOec5qXU
public static void sort(int[] data, int algorithm) { ]xJ'oBhy
impl[algorithm-1].sort(data); ^Kw&=u
} a8bX"#OR&N
xS H6n
public static interface Sort { ,<Grd5em.
public void sort(int[] data); PUQ_w
} =#.8$oa^
%)<oX9E
public static void swap(int[] data, int i, int j) { {hvQ<7b
int temp = data; fz<|+(_>J
data = data[j]; EBj,pk5M
data[j] = temp; d739UhKC
} rSF;Lp)}
} m0%iw1OsH%