[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; cdJ`Gk
} {80oRD2=Q
int i1=l; 43u PH1 )
int i2=mid+1; *t?~)o7
for(int cur=l;cur<=r;cur++){ FU(}=5n
if(i1==mid+1) "doU.U&u
data[cur]=temp[i2++]; p-i.ITRS
else if(i2>r) *m| t=9E
data[cur]=temp[i1++]; p(H)WD
else if(temp[i1] data[cur]=temp[i1++]; '?`@7Eol
else G>[ NZE
data[cur]=temp[i2++]; *< $c =
} ;o_V!<$
} s0\f9D
n?ZL"!$
} jHu,u|e0>S
0\EpH[m}-
改进后的归并排序: T1Gp$l
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package org.rut.util.algorithm.support; ^)9MzD^_nV
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import org.rut.util.algorithm.SortUtil; (^DLCP#*
JVUZ}#O
/** D0Vyh"ua
* @author treeroot H-/; l54E
* @since 2006-2-2 C@TN5?Z
* @version 1.0 [)Z'N/;0
*/ KMxNH,5
public class ImprovedMergeSort implements SortUtil.Sort { XD$%
F,p`-m[q
private static final int THRESHOLD = 10; DEUd[
ill-%OPeg
/* {h/OnBwG
* (non-Javadoc) %XEKhy
* 0On?{Bw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qYgwyj=4
*/ kfMhw M8kP
public void sort(int[] data) { QHHW(InG<
int[] temp=new int[data.length]; 18DTv6?QG
mergeSort(data,temp,0,data.length-1); M>*0r<qn
} E;6Y? vJ
.-SDo"K.h
private void mergeSort(int[] data, int[] temp, int l, int r) { 1s{ISWm
int i, j, k; u @{E{
int mid = (l + r) / 2; ]}mly`Fw
if (l == r) 7ei>L]gm%
return; Q!4i_)rM
if ((mid - l) >= THRESHOLD) ${A5-
mergeSort(data, temp, l, mid); G0_&gx`
else ,{.zh&=4
insertSort(data, l, mid - l + 1); /6+1{p
if ((r - mid) > THRESHOLD) !cq=)xR
mergeSort(data, temp, mid + 1, r); "C_T]%'Wm
else Vk MinE
insertSort(data, mid + 1, r - mid); l,*yEkU
JP{UgcaF
for (i = l; i <= mid; i++) { 5SoZ$,a<e
temp = data; |ZvNH ~!
} Uj4Lu
for (j = 1; j <= r - mid; j++) { u~$WH, P3
temp[r - j + 1] = data[j + mid]; ?8 SK\{9r6
} AuoxZ?V
int a = temp[l]; DJmoW
int b = temp[r]; ayV6m
for (i = l, j = r, k = l; k <= r; k++) { >;&Gz-lm
if (a < b) { |HrM_h<X
data[k] = temp[i++]; 'M~BE\
a = temp; Ze-MAt
} else { NJn&>/vM
data[k] = temp[j--]; EKqi+T^=F
b = temp[j]; lp,\]]
} RY9+ 9i
} ]vm\3=@}9
} W[@i;f^g
,/i_QgP
/** +O)]^"TG
* @param data 3^!Hl8P7
* @param l Q Oz9\,C
* @param i m_cO<LB
*/ U{73Xax
private void insertSort(int[] data, int start, int len) { c]6V"Bo}A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S3SV.C:z>
} 'I&|1I^
} ,`;jvY~Ec
} ./#e1m?.
} ! mm5I#s
y)6,0K {k
堆排序： i\(\MzW*'
M(qxq(#{U
package org.rut.util.algorithm.support; PKi_Zh.D
GtF2@\
import org.rut.util.algorithm.SortUtil; Z`rK\Bc
}<SNO)h3
/** yc*<:(p
* @author treeroot =g@R%NDNV
* @since 2006-2-2 zu52p4
* @version 1.0 CE{z-_{^
*/ D,k(~
public class HeapSort implements SortUtil.Sort{ WElrk:b
,*7H|de7
/* (non-Javadoc) Am=wEu[b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `8,w[o oC2
*/ PfyRZ[3)c
public void sort(int[] data) { fCB:733H
MaxHeap h=new MaxHeap(); "ml?7Xl,n
h.init(data); Yj) e$f
for(int i=0;i h.remove(); Xq|nJ|h
System.arraycopy(h.queue,1,data,0,data.length); tG/1pW
} wa" uFW
NUMi])HkN
private static class MaxHeap{ 3@G;'|z
WE")xhV6
void init(int[] data){ )%s +?
this.queue=new int[data.length+1]; B#]_8svO
for(int i=0;i queue[++size]=data; tVunh3-
fixUp(size); :y\09)CJK
} S."7+g7Ar
} Sr&T[ex,.
N=#4L$@-
private int size=0; Id%_{),HX
}&1Iyb
private int[] queue; *wwhZe4V
yLW/ -%I#u
public int get() { 27>a#vCT
return queue[1]; va5FxF*%
} _Fizgs
\83sSw
public void remove() { a"QU:<-v
SortUtil.swap(queue,1,size--); uArR\k(
fixDown(1); MHo1 lrZa+
} [h4o7
file://fixdown R uLvG+
private void fixDown(int k) { }kE87x'
int j; J='W+=N
while ((j = k << 1) <= size) { 0N{+y}/G
if (j < size %26amp;%26amp; queue[j] j++; .B>B`q;B
if (queue[k]>queue[j]) file://不用交换 %,|ztH/ Q
break; t^.'>RwW|
SortUtil.swap(queue,j,k); )Pli})
k = j; M-Y0xWs
} &8sV o@Pa
} k(vPg,X>m
private void fixUp(int k) { Zm(dY*z5:J
while (k > 1) { gLIT;BK
int j = k >> 1; w>qCg XU3
if (queue[j]>queue[k]) 8.?E[~
break; 6^;^rUlm
SortUtil.swap(queue,j,k); '"'Btxz
k = j; H] k'?;
} jJ~Y]dQi
} 4<.O+hS
r~8;kcu7
} DZe}y^F
5lTD]d
} }>&KUl
)47MFNr~>
SortUtil： ;LRW 8Wd
M$A#I51
package org.rut.util.algorithm; &aPl`"j
%jEY3q
import org.rut.util.algorithm.support.BubbleSort; <tbZj=*O/o
import org.rut.util.algorithm.support.HeapSort; g_w&"=.jBq
import org.rut.util.algorithm.support.ImprovedMergeSort; aI(>]sWJ
import org.rut.util.algorithm.support.ImprovedQuickSort; ,+._;[k
import org.rut.util.algorithm.support.InsertSort; 5j eO"jB
import org.rut.util.algorithm.support.MergeSort; ]` ]g@v
import org.rut.util.algorithm.support.QuickSort; =Ikg.jYq&F
import org.rut.util.algorithm.support.SelectionSort; kq-6HDR
import org.rut.util.algorithm.support.ShellSort; e"Rm_t
%6ub3PLw8
/** iePf ]O*
* @author treeroot \Hwg) Uc{
* @since 2006-2-2 F98i*K`"
* @version 1.0 1pP1d%
*/ >qR~'$,$
public class SortUtil { _8><| 3d
public final static int INSERT = 1; M=y0PCD
public final static int BUBBLE = 2; 4:mCXP,x
public final static int SELECTION = 3; |NrrTN?>
public final static int SHELL = 4; 0xpx(T[
public final static int QUICK = 5; TfRGA(+#
public final static int IMPROVED_QUICK = 6; ^Y04qeRd
public final static int MERGE = 7; Ht[{ryTxu
public final static int IMPROVED_MERGE = 8; :?CQuEv-
public final static int HEAP = 9; Y ?'tUV
&Un6ay
public static void sort(int[] data) { ~p*1:ij
sort(data, IMPROVED_QUICK); Pxhz@":[
} z^W$%G
private static String[] name={ l#bAl/c`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5PZN^\^
}; 6^#uLp>
s_eOcm
private static Sort[] impl=new Sort[]{ /\=MBUN
new InsertSort(), |}[nH>
new BubbleSort(), |dmh
new SelectionSort(), XM~~y~j
new ShellSort(), jm3G?Vnq
new QuickSort(), pCU*@c!
new ImprovedQuickSort(), I^3:YVR&
new MergeSort(), &~-~5B|3"
new ImprovedMergeSort(), 61_f3S(u
new HeapSort() Vq ^]s$'
}; !gP0ndRJ=
Yck~xt&]
public static String toString(int algorithm){ N4UM82N
return name[algorithm-1]; 9z ?7{2C
} K:5eek
u&]vd /
public static void sort(int[] data, int algorithm) { N[U9d}Zv
impl[algorithm-1].sort(data); >dQK.CG
} 8#LJ*o
SH8/0g?
public static interface Sort { ^Jx$t/t
public void sort(int[] data); XnUO*v^]
} $'"8QOnJ?k
"5!BU&
public static void swap(int[] data, int i, int j) { .g% Y@r)=5
int temp = data; vtxvS3
data = data[j]; 1 W'F3
data[j] = temp; @CQb[!9C
} l1+[
} p-$Cs _{Z