[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; 'g'RXC}D>
} vf+z0df
int i1=l; EJb+yy6
int i2=mid+1; X"r.*fb;N
for(int cur=l;cur<=r;cur++){ DLqH*U
if(i1==mid+1) o9]32l
data[cur]=temp[i2++]; 4Y2I'~'
else if(i2>r) &ni#(
data[cur]=temp[i1++]; tgi%#8ZDpz
else if(temp[i1] data[cur]=temp[i1++]; XBkaum4j
else rwP)TJh"
data[cur]=temp[i2++]; Qzo -Yw`=
} ~_N,zw{x
} D M+MBK
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} dzAumWoh
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改进后的归并排序: J@E]Fl
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package org.rut.util.algorithm.support; Y;huTZ
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import org.rut.util.algorithm.SortUtil; ^v cnDi
rr1'| k"
/** hif;atO
* @author treeroot *ls6k`ymL
* @since 2006-2-2 izaqEz
* @version 1.0 V:J|shRo
*/ #0uu19+}
public class ImprovedMergeSort implements SortUtil.Sort { X1a~l|$h
&oB*gGRw=7
private static final int THRESHOLD = 10; 4dCXBTT
F+Qnf'at1
/* _|0#
* (non-Javadoc) lnyq%T[^
* 3'`&D/n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zF[Xem
*/ (@xC-*
public void sort(int[] data) { oST)E5X;7
int[] temp=new int[data.length]; nAl \9#M
mergeSort(data,temp,0,data.length-1); aY(s &
} ('C)S)98C
_BerHoQd
private void mergeSort(int[] data, int[] temp, int l, int r) { [7gz?9VyLF
int i, j, k; 2)|=+DN;
int mid = (l + r) / 2; 'l~7u({u
if (l == r) C=q&S6/+
return; iJOG"gI&
if ((mid - l) >= THRESHOLD) zNrn|(Y%Y
mergeSort(data, temp, l, mid); d$bO.t5CLh
else mhhc}dS(H
insertSort(data, l, mid - l + 1); -bOtF%
if ((r - mid) > THRESHOLD) V61oK
mergeSort(data, temp, mid + 1, r); )z@ +|A
else #@`c7SR
insertSort(data, mid + 1, r - mid); H+Bon=$cE!
NcF>}f,}\
for (i = l; i <= mid; i++) { 6O6B8
temp = data; .*njgAq7
} .`+~mQ Wn
for (j = 1; j <= r - mid; j++) { wUr(i*
temp[r - j + 1] = data[j + mid]; z8}QXXa
} F)Q[ cai
int a = temp[l]; <@ ts[p.
int b = temp[r]; ?zutU w/m
for (i = l, j = r, k = l; k <= r; k++) { mkyYs[
if (a < b) { f['lY1#V1
data[k] = temp[i++]; ),B/NZ/-
a = temp; vvxD}p=y
} else { *kK +Nvt8s
data[k] = temp[j--]; /N*<Fq7w~
b = temp[j]; Tb?XKO,
} XfVdYmii
} .txtt?ZF2
} {-me;ayk
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/** ]f&]E ~i
* @param data iZdl0;16[
* @param l l6w\E=K
* @param i zzI,iEG
*/ YQ?hAAJ
private void insertSort(int[] data, int start, int len) { X{Vs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H#hpaP;
} iz/CC V L
} P}gtJ;
} ^i_v\E[QU
} M\CzV$\y
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堆排序： Y1sK sdV
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package org.rut.util.algorithm.support; ,=Wj*S)~
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import org.rut.util.algorithm.SortUtil; #BBDI
XZ@+aG_%q
/** L{>rN`{
* @author treeroot !=.y[Db=
* @since 2006-2-2 -nC&t~sD
* @version 1.0 @Nh}^D >j
*/ }6%\/d1~ 6
public class HeapSort implements SortUtil.Sort{ Sft vN-
PV"\9OIKb.
/* (non-Javadoc) LXby(|<j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F{ vT^/
*/ 5TuwXz1v
public void sort(int[] data) { MYara;k
MaxHeap h=new MaxHeap(); uQ[,^Ee&/
h.init(data); [&&#~gz
for(int i=0;i h.remove(); Pz2Q]}(w
System.arraycopy(h.queue,1,data,0,data.length); _)Txg2?=
} P(8Yz W
v ,h"u
private static class MaxHeap{ l 7dm@S
i.On{nB"k
void init(int[] data){ !F}GSDDV*
this.queue=new int[data.length+1]; ]=-=D9ZS3
for(int i=0;i queue[++size]=data; <`vXyPA6
fixUp(size); 5,f`5'$
} Wkk(6gS,
} ZyNgG9JL]
.bp#YU,m
private int size=0; ) aMiT
k^K76mB
private int[] queue; [>p!*%m
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public int get() { _ti^i\8~
return queue[1]; }eZ\~2
} 4pXY7+e2'
kkHK~(>G
public void remove() { 6 A]a@,PC
SortUtil.swap(queue,1,size--); Sb2_&5
fixDown(1); OzC%6;6h
} h2mHbe43
file://fixdown /K!f3o+
private void fixDown(int k) { Er@xrhH
int j; {GCp5
while ((j = k << 1) <= size) { I'{Ctc
if (j < size %26amp;%26amp; queue[j] j++; J7{D6@yLS
if (queue[k]>queue[j]) file://不用交换 CHqi5Z/+
break; 4PS|
SortUtil.swap(queue,j,k); Wy6a4oY
k = j; q$v0sTk0Y
} o(54 A['
} NqKeQezX
private void fixUp(int k) { yG~Vvpv
while (k > 1) { $/Q\B(X3
int j = k >> 1; };9/J3]m
if (queue[j]>queue[k]) {*hGe_^
break; 2,I]H'}^
SortUtil.swap(queue,j,k); 0VJHE~Bgi
k = j; v?3xWXX,
} .%W.uF^
} ZWuNl!l>
/\Xe'&
} (?,jnnub
ircL/:
} IR2Qc6+{
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SortUtil： q%A>q;l:
~qL/P 5*+
package org.rut.util.algorithm; -3d`e2^&}
c(8>oeKyD
import org.rut.util.algorithm.support.BubbleSort; P$h) Y
import org.rut.util.algorithm.support.HeapSort; +[ir7?Y.
import org.rut.util.algorithm.support.ImprovedMergeSort; 438r]f?0|{
import org.rut.util.algorithm.support.ImprovedQuickSort; I=[09o
import org.rut.util.algorithm.support.InsertSort; _M;{}!Gc&A
import org.rut.util.algorithm.support.MergeSort; @*6_Rp"@
import org.rut.util.algorithm.support.QuickSort; 4UW)XLu6T7
import org.rut.util.algorithm.support.SelectionSort; VpbJe@*D
import org.rut.util.algorithm.support.ShellSort; y[cc<wm$
<]oPr1
/** 0?I
* @author treeroot 2|RxowXZ"
* @since 2006-2-2 Eoo[H2=^H
* @version 1.0 ,_7m<(/f
*/ '_K`1&#U
public class SortUtil { Mjl,/-0 w
public final static int INSERT = 1; Ae^4
public final static int BUBBLE = 2; }7fzEo`g
public final static int SELECTION = 3; r}|)oG,=
public final static int SHELL = 4; W S9:*YH
public final static int QUICK = 5; Q>w)b]d~c
public final static int IMPROVED_QUICK = 6; /K+;HAUTn
public final static int MERGE = 7; 4>Q] \\Lc
public final static int IMPROVED_MERGE = 8; ]5ibg"{S
public final static int HEAP = 9; ^Nav8dma
B<@a&QBTg
public static void sort(int[] data) { 0T$`;~
sort(data, IMPROVED_QUICK); }+[!h=Bx
} X^m@*,[s
private static String[] name={ m^/>C-&C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b-c6.aKf|
}; oOXJ7|n
Tn3C0
private static Sort[] impl=new Sort[]{ j~;y~Cx?
new InsertSort(), DEfhR?v
new BubbleSort(), >A6PH*x
new SelectionSort(), <x$fD37
new ShellSort(), xw1,Wbu]
new QuickSort(), 3%x-^.
new ImprovedQuickSort(), ]8cD,NS
new MergeSort(), D[YdPg@-
new ImprovedMergeSort(), fl_a@QdB#
new HeapSort() F*:H&,
}; DuQ:82 3b
VF7H0XR/k5
public static String toString(int algorithm){ <`A!9+
return name[algorithm-1]; H3JDA^5
} TUp%Cx
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public static void sort(int[] data, int algorithm) { Fk`6 q
impl[algorithm-1].sort(data); to\$'2F"q
} RC/&dB
}4Gn$'e
public static interface Sort { O=1#KNS
public void sort(int[] data); ]InDcE
} 6H|T )
ZU9RvtbKB
public static void swap(int[] data, int i, int j) { Mw;^`ZxT
int temp = data; " M&zW&
data = data[j]; "KY]2v.
data[j] = temp; P[Vf$ q<
} _xP@kN~
} MF::At[4