[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; %@IR7v~
} c~Ha68
int i1=l; 4[(P>`Unx
int i2=mid+1; Vw,dHIe(3
for(int cur=l;cur<=r;cur++){ E0*81PS
if(i1==mid+1) *AJW8tIP
data[cur]=temp[i2++]; Kg%_e9nj#
else if(i2>r) >yaz
data[cur]=temp[i1++]; "{&!fD~w
else if(temp[i1] data[cur]=temp[i1++]; ~+1t17
else mO\6B7V!
data[cur]=temp[i2++]; Ltu;sw
} U_!6pqFc
} {:? -)Xq
=A,i9Z&
} S |B7HS5
>Rr]e`3wG
改进后的归并排序: 0>AA-~=-
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package org.rut.util.algorithm.support; ]v+\v re
-Z#A}h
import org.rut.util.algorithm.SortUtil; wWH5T}\
\_+d*hHF~
/** Bp b_y;E
* @author treeroot EJRwyF5LK
* @since 2006-2-2 F&uU ,);
* @version 1.0 {!<zk+h$
*/ 3n,F5?!m
public class ImprovedMergeSort implements SortUtil.Sort { )Z]8SED
9 Z4H5!:(
private static final int THRESHOLD = 10; }?H|9OS
d-c+KV
/* 76hi@7a
* (non-Javadoc) :lcoSJ
* Er%nSH^"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e\)PGjSI
*/ k<AnTboa
public void sort(int[] data) { WyO10yvR
int[] temp=new int[data.length]; k6$.pCH6
mergeSort(data,temp,0,data.length-1); ;ASlsUE\)
} OpiN,>;
**oN/5
private void mergeSort(int[] data, int[] temp, int l, int r) { p!HpqW
int i, j, k; tQ*5[F,fm
int mid = (l + r) / 2; =WHdy;
if (l == r) V a<L[8
return; BCFvqhF7s
if ((mid - l) >= THRESHOLD) -`A6K!W&~p
mergeSort(data, temp, l, mid); 5I@< 6S&X
else vQ 5 p
insertSort(data, l, mid - l + 1); sqsBGFeG
if ((r - mid) > THRESHOLD) 2o6%P}C
mergeSort(data, temp, mid + 1, r); LB-4/G$
else yQh":"$k
insertSort(data, mid + 1, r - mid); VJm).>E3k
uN'e~X6
for (i = l; i <= mid; i++) { Ut0oh
temp = data; aLG6yVtu
} %\CsP!
for (j = 1; j <= r - mid; j++) { P0|V1,)
temp[r - j + 1] = data[j + mid]; \QQw1c+
} h19c*,0z!
int a = temp[l]; Sl{]Z,
int b = temp[r]; 1*#64Y5F
for (i = l, j = r, k = l; k <= r; k++) { qA5tMZ^w
if (a < b) { RtN5\
data[k] = temp[i++]; ^ @sg{_.~l
a = temp; f7\$rx
} else { JZ9w!)U
data[k] = temp[j--]; <&Y7Q[
b = temp[j]; 8I`>tY
} Lxs
} 6>zO"9
} Fq9AO~z
PjDYdT[
/** h>q&X4-
* @param data }c$Zlb
* @param l 6"z:s-V
* @param i &h')snp:#
*/ >q"mI6F
private void insertSort(int[] data, int start, int len) { IrM Ws86;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3u_[=a
} MoavA 3`
} ljQru ^(u
} KP%A0
} ~CQsv`
/n&w|b%
堆排序： +q6/'ErN]m
A+_361KH
package org.rut.util.algorithm.support; GMrjZ
B&VruOP0
import org.rut.util.algorithm.SortUtil; ~4<xTP\*
>2tYw,m
/** !T!U@e=u
* @author treeroot Jt^a
* @since 2006-2-2 ;3'ta!.c
* @version 1.0 :H@Q`g u
*/ RNiFLD%5
public class HeapSort implements SortUtil.Sort{ GU([A@;
zT 9"B
/* (non-Javadoc) 7'LKyy !"3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WRe9ki=R
*/ % tTL
public void sort(int[] data) { //xK v{3fI
MaxHeap h=new MaxHeap(); Y({&}\o
h.init(data); xk7MMRb
for(int i=0;i h.remove(); iz.J._&
System.arraycopy(h.queue,1,data,0,data.length); *2P%731n5
} \oA>%+]5
&s-iie$"@x
private static class MaxHeap{ !:]CKbG
&@<Z7))
void init(int[] data){ GHWi,' mr
this.queue=new int[data.length+1]; Arc6d5Q
for(int i=0;i queue[++size]=data; HRn Q*
fixUp(size); @y]ek/
} VKqIFM1b
} #ueWU
oR}cE Sr
private int size=0; i&=I5$
<Nwqt[.
private int[] queue; JFewOt3
(E[c-1s
public int get() { ]Dec/Nnj
return queue[1]; y(^t&tgjS
} :7>oFz
'{*{
public void remove() { _UI*W&*
SortUtil.swap(queue,1,size--); xq$(=WPI
fixDown(1); `ECY:3"$KA
} {%Cb0Zh
file://fixdown 41Ga-0p
private void fixDown(int k) { w`KqB(36
int j; Lz6b9W
while ((j = k << 1) <= size) { B>C+qj@
if (j < size %26amp;%26amp; queue[j] j++; =S+*=jA
if (queue[k]>queue[j]) file://不用交换 Z(F['Zf
break; M~+}ss
SortUtil.swap(queue,j,k); xP/?E
k = j; VW&EdrR,S
} )cP&c=
} S1$lNB
private void fixUp(int k) { .Q!_.LX
while (k > 1) { EmG':K(
int j = k >> 1; &tVIl$e
if (queue[j]>queue[k]) X} {z7[
break; Z mVw5G q
SortUtil.swap(queue,j,k); ``mnk>/
k = j; K-,4eq!
} X(Z~oGyg
} b'r</ncZ
*yl?M<28
} #z6[8B
G`D rY;
} x%_VzqR`
S3oyx#R('O
SortUtil： aQ.QkMZ
8FT]B/^&m
package org.rut.util.algorithm; #ME!G/
T3wQRn
import org.rut.util.algorithm.support.BubbleSort; \3"jW1Wb
import org.rut.util.algorithm.support.HeapSort; NTWy1
import org.rut.util.algorithm.support.ImprovedMergeSort; `D-P}hDm!
import org.rut.util.algorithm.support.ImprovedQuickSort; 2JdzeJb
import org.rut.util.algorithm.support.InsertSort; S@Iza9\|@
import org.rut.util.algorithm.support.MergeSort; d6^:lbj
import org.rut.util.algorithm.support.QuickSort; eR3v=Q
import org.rut.util.algorithm.support.SelectionSort; kI?+\k\V`
import org.rut.util.algorithm.support.ShellSort; u*}ltR~/
YuXCRw9p;
/** h*>%ou
* @author treeroot /O[<"Wcz
* @since 2006-2-2 \+M6R<Qw
* @version 1.0 o|kiwr}Y
*/ yE&WGpT
public class SortUtil { -.@dA'j[
public final static int INSERT = 1; /PZx['g
public final static int BUBBLE = 2; Zh
public final static int SELECTION = 3; t]IHQ8
public final static int SHELL = 4; y`,;m#frT
public final static int QUICK = 5; Y5{KtW
public final static int IMPROVED_QUICK = 6; I=[Ir8};
public final static int MERGE = 7; 9| g]M:{
public final static int IMPROVED_MERGE = 8; 'GI| t
public final static int HEAP = 9; m>{a<N
s5/u>d
public static void sort(int[] data) { NiH =T
sort(data, IMPROVED_QUICK); ~] &yHzp2
} `- HI)-A97
private static String[] name={ TTa$wiW7'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HKL/D
}; !F:ANoaS
vX@TZet0
private static Sort[] impl=new Sort[]{ /S{U|GBB%r
new InsertSort(), 6& (bL<8b
new BubbleSort(), dAWB.#
new SelectionSort(), KS'n$
new ShellSort(), ;FGS(.mjlC
new QuickSort(), ^GpLl
new ImprovedQuickSort(), de/oK c
new MergeSort(), DaS~bweMw
new ImprovedMergeSort(), |*/-~5"
new HeapSort() $d-$dM?R5
}; 1=Kt.tuf
^IgQIN
public static String toString(int algorithm){ "T$LJ1E
return name[algorithm-1]; b>-h4{B[
} iEEP~
w}]BJ<C
public static void sort(int[] data, int algorithm) { #iKPp0`K*
impl[algorithm-1].sort(data); BOOb{kcg
} (|\%)vH-
C$0rl74Wi
public static interface Sort { 2qdc$I&$
public void sort(int[] data); sYhHh$mwA
} GbC@ |
BG6.,'~7o
public static void swap(int[] data, int i, int j) { -5oYGLS$y3
int temp = data; `_k_}9Fr
data = data[j]; CNe(]HIOH
data[j] = temp; kQ]4Bo
} |:.s6a#(
} ;Fo7 -kK