[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; Q{l,4P
} 0*gvHVd/l
int i1=l; )1s5vNVa
int i2=mid+1; OQ-) 4Uk}
for(int cur=l;cur<=r;cur++){ u8Ys2KLpL
if(i1==mid+1) %?ElC
data[cur]=temp[i2++]; n1sYD6u<&
else if(i2>r) J(7#yg%5
data[cur]=temp[i1++]; AV5={KK
else if(temp[i1] data[cur]=temp[i1++]; =zkN63S
else |[SHpcq>
data[cur]=temp[i2++]; Q5,zs_j
} lLD#|T3
} BEDkyz;:
EXDDUqZ5\
} B7%K}|Qg
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改进后的归并排序: "#1\uoH
Q:A#4Z
package org.rut.util.algorithm.support; YYWD\Y`8
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import org.rut.util.algorithm.SortUtil; w!F>fcm
i|eX X)$
/** 4agW<c#
* @author treeroot +_5*4>MC
* @since 2006-2-2 6jq*lnA%
* @version 1.0 3=O [Q:8
*/ thjr1y.e
public class ImprovedMergeSort implements SortUtil.Sort { /Hr|u
nWd!ovd
private static final int THRESHOLD = 10; ] K$YtM^
gIB3DuUo
/* yE:y[k0E
* (non-Javadoc) Z@bgJL83
* I9X\@lTf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DQG%`-J
*/ CIW4E
public void sort(int[] data) { Nq8ON!<<
int[] temp=new int[data.length]; |AYii-g
mergeSort(data,temp,0,data.length-1); q/s-".%P
} m?e/MQr
dxeiN#(XT
private void mergeSort(int[] data, int[] temp, int l, int r) { Kb;*"@LX
int i, j, k; vk7IqlEQ
int mid = (l + r) / 2; _Ewh:IM-
if (l == r) f"Sp.'@
return; &^`Wtd~g
if ((mid - l) >= THRESHOLD) '2lV(>"
mergeSort(data, temp, l, mid); /YJo"\7
else Fb,*;M1'
insertSort(data, l, mid - l + 1); Cl0kR3Y
if ((r - mid) > THRESHOLD) [jgVN w""D
mergeSort(data, temp, mid + 1, r); !tq]kKJ3:
else wB)y@w4k
insertSort(data, mid + 1, r - mid); M5I`i{Gw
R27'00(Z0
for (i = l; i <= mid; i++) { b|i4me@
temp = data; a6Vfd&
} w%L4O;E]*{
for (j = 1; j <= r - mid; j++) { A$2 ;Bf
temp[r - j + 1] = data[j + mid]; B^2r4 9vC
} $0V+<
int a = temp[l]; _7!ZnJrR
int b = temp[r]; 6wp1jN
for (i = l, j = r, k = l; k <= r; k++) { By1Tum+I1
if (a < b) { klKUX/g
data[k] = temp[i++]; @Ou H=<YN
a = temp; o*K7(yUL4
} else { }83 8F&
data[k] = temp[j--]; {V7mpVTX.
b = temp[j]; %pVsafV
} H9WYt#
} N82 6xvA
} "M/c0`>C!i
kn:hxdZ
/** 7;Ze>"W>
* @param data S(.J
* @param l zY/Oh9`=v
* @param i W3~u J(
*/ oG)T>L[&
private void insertSort(int[] data, int start, int len) { b36{vcs~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X3sAy(q
} ;bwBd:Y
} B W*8
} dOv\]
} 7c\W&ZEmb-
J* !_O#
堆排序： 4D&L]eJ
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package org.rut.util.algorithm.support; @PM<pEve
#~p;s>
import org.rut.util.algorithm.SortUtil; kk5&lak2V
gq?O}gVD
/** J4eU6W+{
* @author treeroot !,ODczWvh
* @since 2006-2-2 +788aK,{#
* @version 1.0 NK|U:p2H
*/ &&CrF~
public class HeapSort implements SortUtil.Sort{ rhLhFN{h
E 14DZ
/* (non-Javadoc) G9XkimQ'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IZrcn
*/ l!}gWd,H
public void sort(int[] data) { R:n|1]*f3X
MaxHeap h=new MaxHeap(); uKzx >\}?1
h.init(data); 6<@mBZ
for(int i=0;i h.remove(); m>+
System.arraycopy(h.queue,1,data,0,data.length); SN)Czi#7
} Lea4-Gc
1q;R+65
private static class MaxHeap{ bq5ySy{8
%@%rdrZ
void init(int[] data){ n7i~^nf>
this.queue=new int[data.length+1]; Z:^<NdKe
for(int i=0;i queue[++size]=data; bv <^zuV
fixUp(size); rmBzLZ}
} )0I-N)
} 8\E=p+C
POm;lM$
private int size=0; IZdWEbN1
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private int[] queue; Ho}*Bn~ic
rhzI*nwOT
public int get() { k6DJ(.n'%a
return queue[1]; 3<.DiY
} m!zvt
?lqqu#;8
public void remove() { D*46,>Tv
SortUtil.swap(queue,1,size--); c='W{47
fixDown(1); Y,mo}X<>
} R4)l4rnO
file://fixdown ,h%n5R$:
private void fixDown(int k) { Z 9cb
int j; x$Wtkb0<
while ((j = k << 1) <= size) { G~_eBy
if (j < size %26amp;%26amp; queue[j] j++; 08@4u L
if (queue[k]>queue[j]) file://不用交换 L4+R8ojG
break; I|bX;l
SortUtil.swap(queue,j,k); aA*h*
k = j; s,C>l_4-
} b* n#XTV
} 8>|4iT
private void fixUp(int k) { kyJKai
while (k > 1) { =.J>'9Q
int j = k >> 1; %;_EWs/z8
if (queue[j]>queue[k]) oN83`Z
break; ]LCL?zAzH!
SortUtil.swap(queue,j,k); ELG{xN=o
k = j; $Y$s*h_-/<
} [$>@f{:
} $^e_4]k
M_?B*QZJI
} o{2B^@+Vb
0aGauG[
} rCGKE`H
RU.MJ kYQ5
SortUtil： GAR6nJCz
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package org.rut.util.algorithm; E-9>lb
RXWdqaENx
import org.rut.util.algorithm.support.BubbleSort; RY,L'GtO
import org.rut.util.algorithm.support.HeapSort; 2:[<E2z
import org.rut.util.algorithm.support.ImprovedMergeSort; (:+Wc^0
import org.rut.util.algorithm.support.ImprovedQuickSort; H?=[9?1wI5
import org.rut.util.algorithm.support.InsertSort; ]RVme^=
import org.rut.util.algorithm.support.MergeSort; j)mS3#cH
import org.rut.util.algorithm.support.QuickSort; tsB}'+!v#
import org.rut.util.algorithm.support.SelectionSort; |jWA >S
import org.rut.util.algorithm.support.ShellSort; +,ld;NM{
#)T'a
/** JV;VR9-l
* @author treeroot !cO<N~0*5x
* @since 2006-2-2 F9IPA%
* @version 1.0 nwDW<J{f|U
*/ Pl|*+g
public class SortUtil { t/]za4w/
public final static int INSERT = 1; X-"0Zc
public final static int BUBBLE = 2; 3\B~`=*q/
public final static int SELECTION = 3; qm=9!jqC;
public final static int SHELL = 4; ,+5!1>\
public final static int QUICK = 5; 4 $)}d
public final static int IMPROVED_QUICK = 6; V2 }.X+u&<
public final static int MERGE = 7; ?I.bC
public final static int IMPROVED_MERGE = 8; eYg0NEq{
public final static int HEAP = 9; z)&&Ym#
8?o{{ay
public static void sort(int[] data) { tgrZs8?
sort(data, IMPROVED_QUICK); pAtxEaXh
} - :x6X$=
private static String[] name={ U,`F2yD/!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _ =(v? 2:?
}; ;Ac!"_N?7
Fz$^CMw5K
private static Sort[] impl=new Sort[]{ M[Jy?b)
new InsertSort(), HxShNU
new BubbleSort(), J\ ?
new SelectionSort(), ]!N|3"Ls
new ShellSort(), wo) lkovd
new QuickSort(), _4t
new ImprovedQuickSort(), Z@#kivcpz
new MergeSort(), f:A1j\A?
new ImprovedMergeSort(), W'C~{}c=
new HeapSort() *i7|~q/u
}; (Mt-2+"+
w5Yt mnP
public static String toString(int algorithm){ vQ DlS1L
return name[algorithm-1]; )!D,;,aQ
} hzy#%FaB
,-Yl%R.W=
public static void sort(int[] data, int algorithm) { 0a's[>-'A
impl[algorithm-1].sort(data); h\OMWJ~
} )>^!X$`3
RMxFo\TK;
public static interface Sort { HS 1zA
public void sort(int[] data); Bjsg!^X7
} RZ:=';
DqBiBH[%h
public static void swap(int[] data, int i, int j) { ,tHV H7[
int temp = data; "?{=|%mf
data = data[j]; /.[78:G\,
data[j] = temp; A]s|"Pav,
} kt hy9<!$
} #uH%J<U