[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; !|\l*
} Xz`0nU
int i1=l; vb6kr?-i*
int i2=mid+1; i&YWutG
for(int cur=l;cur<=r;cur++){ stQ_Ke
if(i1==mid+1) % :h%i|
data[cur]=temp[i2++]; 6=:s3I^
else if(i2>r) 3 3zE5vr
data[cur]=temp[i1++]; Vh{(*p
else if(temp[i1] data[cur]=temp[i1++]; Z@(KZ|
else g%<n9AUl
data[cur]=temp[i2++]; MXiQWg$
} dTjDVq&Hz
} 6EeO\Qj{
|j~l%d*<w
} _"*}8{|
6H=gura&
改进后的归并排序: $*|M+ofQ
cj9C6Y!
package org.rut.util.algorithm.support; m!5Edo-;<
u}b%-:-
import org.rut.util.algorithm.SortUtil; gxx#<=`
,Qs%bq{t
/** LcZ|A;it
* @author treeroot [5!dO\-[
* @since 2006-2-2 (9R;-3vY:S
* @version 1.0 6?'7`p
*/ t{s*,X\b
public class ImprovedMergeSort implements SortUtil.Sort { k!Q{u2
eR0$CTSw
private static final int THRESHOLD = 10; c?N,Cd~q
#_{Q&QUk
/* }R11G9N.
* (non-Javadoc) Z&O6<=bg!
* tzthc*-<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jD${ZIv
*/ SA7(EJ95
public void sort(int[] data) { Re&"Q8I.8
int[] temp=new int[data.length]; [Q+k2J_h
mergeSort(data,temp,0,data.length-1); L7hRFf-o
} G[1\5dK*uR
(zh[1[a
private void mergeSort(int[] data, int[] temp, int l, int r) { HItNd
int i, j, k; A,BYi$
int mid = (l + r) / 2; z0OxJe
if (l == r) c_8<N7 C
return; A; wT`c
if ((mid - l) >= THRESHOLD) UWidT+'Sa
mergeSort(data, temp, l, mid); J ZkQ/vp(
else LT"H-fTgs
insertSort(data, l, mid - l + 1); K_@?Q@#YhR
if ((r - mid) > THRESHOLD) s&Y"a,|Z
mergeSort(data, temp, mid + 1, r); kg 8Dn
else BM'!odRv
insertSort(data, mid + 1, r - mid); 2?SbkU/3|P
'NZ=DSGIy
for (i = l; i <= mid; i++) { +:"0%(
temp = data; U(#JC(E-#
} iGkysU<wcp
for (j = 1; j <= r - mid; j++) { le]~Cy0
temp[r - j + 1] = data[j + mid]; x x4GP2
} N#2ldY *
int a = temp[l]; =YTcWB
int b = temp[r]; - Z`RKR8C
for (i = l, j = r, k = l; k <= r; k++) { H>A6VDu
if (a < b) { JJM<ywPGp
data[k] = temp[i++]; 2 rr=FJ
a = temp; [orL.D]
} else { f:-l}Zj
data[k] = temp[j--]; Zskj?+1
b = temp[j]; -58q6yA
} 9 @xl{S-
} z}B39L
} Mx$&{.LFJ
Xh>($ U
/** ?:ZB'G{%E
* @param data n{i,`oQ"
* @param l *67K_<bp]
* @param i fjVy;qJ32S
*/ #K6cBfqI
private void insertSort(int[] data, int start, int len) { 50j8+xJPV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yji[Yde;|
} BqY_N8l&E
} wV"`Du7E;
} "J`&"_CyZ
} +l/v`=C
&'x~<rx
堆排序： Rh?bBAn8
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package org.rut.util.algorithm.support; >a,D8M?
c%J6!\
import org.rut.util.algorithm.SortUtil; JD~;.3$/k
,_fz)@)
/** 4]uj+J
* @author treeroot Vh;zV Y
* @since 2006-2-2 > :IWRc2
* @version 1.0 c&!mKMrk
*/ acR|X@\3
public class HeapSort implements SortUtil.Sort{ #F.jf2h@
!6T"J!F#
/* (non-Javadoc) ~?AEtl#&"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C=/B\G/.9
*/ {^ b2nOMv
public void sort(int[] data) { ^Aq0<
MaxHeap h=new MaxHeap(); :t{~Mi=T
h.init(data); ]MV8rC[\
for(int i=0;i h.remove(); <aJQV)]\
System.arraycopy(h.queue,1,data,0,data.length); wDZ<UP=X
} /N"3kK,N
UnF8#~
private static class MaxHeap{ "(^XZAU#W
hd(FOKOP
void init(int[] data){ `x#Ud)g
this.queue=new int[data.length+1]; @)?]u U"L
for(int i=0;i queue[++size]=data; ? T6K]~g
fixUp(size); OegeZV
} ~0a5
} 6(Pan%
`X6JZxGyd
private int size=0; &$F<]]&
Jpj=d@Of70
private int[] queue; GWnIy6TH l
zKO7`.*
public int get() { Dj&~x
return queue[1]; kg[%Q]]
} /Hyz]46
^Tm`motzh
public void remove() { Ki\.w~Qs
SortUtil.swap(queue,1,size--); 8Ojqm#/f
fixDown(1); [|DKBJ
} 8AuBs;i
file://fixdown ] 3"t]U'f
private void fixDown(int k) { c+9L6}D
int j; 2}r=DAe0
while ((j = k << 1) <= size) { lmvp,BzC
if (j < size %26amp;%26amp; queue[j] j++; 4VWk/HK-!
if (queue[k]>queue[j]) file://不用交换 LH8jT
break; RZm%4_p4s
SortUtil.swap(queue,j,k); wZiUzS;v
k = j; :$MOdL[ir
} I6W`yh`I)
} z1PwupXt1
private void fixUp(int k) { <Kd(fFe
while (k > 1) { Q+^&
int j = k >> 1; -n|bi cP
if (queue[j]>queue[k]) 1cLtTE
break; d(T4Kd$r
SortUtil.swap(queue,j,k); {r,Uik-nL
k = j; wA=r]BT
} N{;!xIv
} ;sZG=y@
s[yWBew
} Cbw *?9d
&AQqI
} fu/8r%:h
hmO2s/~
SortUtil： _M&TT]a
= xO03|T;6
package org.rut.util.algorithm; C82_)@96
`@~e<s`j
import org.rut.util.algorithm.support.BubbleSort; Y'iX
import org.rut.util.algorithm.support.HeapSort; ~t`^|cr|
import org.rut.util.algorithm.support.ImprovedMergeSort; \G" S7
import org.rut.util.algorithm.support.ImprovedQuickSort; M&Ka^h;N
import org.rut.util.algorithm.support.InsertSort; LVj1NP
import org.rut.util.algorithm.support.MergeSort; 2$JGhgDI
import org.rut.util.algorithm.support.QuickSort; 4Gc M
import org.rut.util.algorithm.support.SelectionSort; #z*,CU#S9d
import org.rut.util.algorithm.support.ShellSort; H_DCdUgC'
K p3}A$uV
/** tIsWPt]Y
* @author treeroot Zd*$^P,|
* @since 2006-2-2 RP4/:sO
* @version 1.0 yB b%#GW
*/ uJ!&T
public class SortUtil { Ms{";qiG
public final static int INSERT = 1; (vs<Fo|]
public final static int BUBBLE = 2; *'<AwG&
public final static int SELECTION = 3; M!UTqf7XL
public final static int SHELL = 4; 2Je$SE8
public final static int QUICK = 5; pP. _%5
public final static int IMPROVED_QUICK = 6; d7OygDb<
public final static int MERGE = 7; MMM tB6
public final static int IMPROVED_MERGE = 8; 25Dl4<-Z
public final static int HEAP = 9; f%Q{}fC{*
aF{_"X2
public static void sort(int[] data) { X'Ss#s>g
sort(data, IMPROVED_QUICK); <$~lFV
} [{znwK@
private static String[] name={ iNO>'7s7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R'Sd'pSDN
}; h)KHc/S
jEc_!Q
private static Sort[] impl=new Sort[]{ YG "Ta|@5
new InsertSort(), L:R4&|E/t
new BubbleSort(), {f/qI`
new SelectionSort(), f-ltV<C_
new ShellSort(), 3[YG BM(
new QuickSort(), v, $r.g;
new ImprovedQuickSort(), O\5%IfB'"
new MergeSort(), /k#-OXP~
new ImprovedMergeSort(), g9_zkGc7
new HeapSort() ~wvt:E,fC
}; d+9V% T
]ss[n.T0*
public static String toString(int algorithm){ zA,vp^
return name[algorithm-1]; CWj_K2=d
} 4"d,=P.{
7=G2sOC
public static void sort(int[] data, int algorithm) { S$6|KY u
impl[algorithm-1].sort(data); ewZ?+G+m
} 2w?q7N%
44]s`QyG
public static interface Sort { o<`vh*U@,4
public void sort(int[] data); JzyCeM =
} ,UNb#=it
ZoW1Cc&p
public static void swap(int[] data, int i, int j) { z+"tAVB[i
int temp = data; uZqL'l+/y
data = data[j]; B=_w9iVN
data[j] = temp; o`U}uqrO
} ZlT }cA/n
} pu-HEv}]a|