[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; mfffOG
} E.0J94>iM
int i1=l; Jf#-OlEQ
int i2=mid+1; 0V86]zSo
for(int cur=l;cur<=r;cur++){ paMK]-
if(i1==mid+1) rz`"$g+#
data[cur]=temp[i2++]; sO(4F8cpU
else if(i2>r) VfDa>zV3
data[cur]=temp[i1++]; nz#eJ
else if(temp[i1] data[cur]=temp[i1++]; T-+ uQ3
else [~G1Rz\h
data[cur]=temp[i2++]; vl+bc[ i~
} L(k`1E
} 0ZLLbEfnPB
4pelIoj
} u]`0QxvZ
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改进后的归并排序: `ueOb
je3Qq1
package org.rut.util.algorithm.support; ;R<V-gab
,!PV0(F(
import org.rut.util.algorithm.SortUtil; B&1E&Cv_8
f87XE";:A
/** s%>8y\MaK
* @author treeroot bR:hu}YS
* @since 2006-2-2 O 9M?Wk :
* @version 1.0 t. (6tL]
*/ =8rNOi
public class ImprovedMergeSort implements SortUtil.Sort { yOAC<<Tzus
Mc(|+S@w'
private static final int THRESHOLD = 10; PRFl%M.H`
3Z` wU
/* 6V@_?a-K
* (non-Javadoc) [f[Wz{Q#Y
* !"-.D4*r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iTT%_-X-
*/ %""h:1/S
public void sort(int[] data) { |YV> #l
int[] temp=new int[data.length]; h^1!8oOYD
mergeSort(data,temp,0,data.length-1); agkKm?xIL
} 7|_2@4-W6
:qAX9T'{t
private void mergeSort(int[] data, int[] temp, int l, int r) { Q7d@+C
int i, j, k; <%rm?;PBl
int mid = (l + r) / 2; G$QN_h,}
if (l == r) Ho[]03
return; :V@)A/}uk
if ((mid - l) >= THRESHOLD) PDz:x4A
mergeSort(data, temp, l, mid); UlNV%34"
else mI:^lp
insertSort(data, l, mid - l + 1); `CBXz!v!O
if ((r - mid) > THRESHOLD) o61rTj
mergeSort(data, temp, mid + 1, r); fgC@(dvfk
else :qj;f];|
insertSort(data, mid + 1, r - mid); QP%Hwt]+
oe3=QE
for (i = l; i <= mid; i++) { EwuRIe;D
temp = data; /& c2y=/'C
} $<&_9T#&w
for (j = 1; j <= r - mid; j++) { ]:']
temp[r - j + 1] = data[j + mid]; kCoE;)y$
} _IV!9 JL
int a = temp[l]; q"DHMZB
int b = temp[r]; dxH\H?NO
for (i = l, j = r, k = l; k <= r; k++) { x(4"!#
if (a < b) { V[WLS?-)
data[k] = temp[i++]; b353+7"|
a = temp; 0w< ilJ
} else { ~Cg7
data[k] = temp[j--]; L$+_
b = temp[j]; ;O{bF8U
} h+Yd \k
} `_i|\}tl
} =YfzB!ld
j(K)CHH
/** FUJ<gqL
* @param data rwio>4=
* @param l $/@ L
* @param i ZJF+./vN
*/ `g)
private void insertSort(int[] data, int start, int len) { B*Om\I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vW!O("\7K<
} W,H=K##6<
} 'Nuy/\[{\
} v&d'ABeT
} 2mMi=pv9
,=c(P9}^
堆排序： Q>9bKP
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package org.rut.util.algorithm.support; 1;i|GXY:h
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import org.rut.util.algorithm.SortUtil; #n15_cd
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/** ,oSn<$%/q
* @author treeroot qN9 ?$\
* @since 2006-2-2 F7nwVDc*
* @version 1.0 }A;YM1^$
*/ F< 5kcu#iL
public class HeapSort implements SortUtil.Sort{ R#8cOmZ
7 b(
/* (non-Javadoc) YjJ^SU`*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7#oq|5
*/ 3/uvw>$
public void sort(int[] data) { LHu
MaxHeap h=new MaxHeap(); +Wy`X5v
h.init(data); %g89eaEZ
for(int i=0;i h.remove(); B!8X?8D
System.arraycopy(h.queue,1,data,0,data.length); 8faT@J'e;
} {D :WXvI
!<VP[%2L~
private static class MaxHeap{ 2Ub-ufkU
Li0+%ijM
void init(int[] data){ l{ql'm
this.queue=new int[data.length+1]; 98^7pa
for(int i=0;i queue[++size]=data; @]8flb )T
fixUp(size); BA@M>j6d
} b`j9}tZ
} MLM/!N 7
$>uUn3hSx\
private int size=0; $cwmfF2C
!$ii*}
private int[] queue; =h +SZXe<r
Z]bG"K3l
public int get() { W/WP }QM
return queue[1]; e6tU8`z
} (: kn)
Iw)m9h
public void remove() { T5e#Ll/
SortUtil.swap(queue,1,size--); R^sgafGl=
fixDown(1); Z(tO]tQE
} Nq\)o{<1
file://fixdown `.3.n8V
private void fixDown(int k) { &y|PseH"
int j; 8g-Z~~0W1
while ((j = k << 1) <= size) { v<)&JlR
if (j < size %26amp;%26amp; queue[j] j++; C.LAr~P
if (queue[k]>queue[j]) file://不用交换 M5dEZ
break; -MsL>F.]
SortUtil.swap(queue,j,k); FwHqID_!:l
k = j; Qb%; |li
} *P]]7DR
} bwP@}(K
private void fixUp(int k) { |8[!`T*s
while (k > 1) { 2J$vX(
int j = k >> 1; BhbfPQ
if (queue[j]>queue[k]) tlg}"lY
break; u2$.EM/iae
SortUtil.swap(queue,j,k); uTPAf^|
k = j; :pz@'J
} nnE'zk<"
} V=5*)i/
CyHHV
} +/kOUz/]
B B'qbX3xK
} Ie=gI+2
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SortUtil： 61&{I>~1
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package org.rut.util.algorithm; ht>/7.p]
x>BFK@#
import org.rut.util.algorithm.support.BubbleSort; )b=vBs`%
import org.rut.util.algorithm.support.HeapSort; s6(md<r
import org.rut.util.algorithm.support.ImprovedMergeSort; _/cX!/"
import org.rut.util.algorithm.support.ImprovedQuickSort; &b*v7c=o
import org.rut.util.algorithm.support.InsertSort; ,,80nW9E
import org.rut.util.algorithm.support.MergeSort; LikCIO
import org.rut.util.algorithm.support.QuickSort; "$K]+0ryG<
import org.rut.util.algorithm.support.SelectionSort; Z1+Ewq3m
import org.rut.util.algorithm.support.ShellSort; O{7#Xj :_
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/** *b0z/6
* @author treeroot z j#<X
* @since 2006-2-2 V51kX{S
* @version 1.0 u;1[_~
*/ 5rCJIl.
public class SortUtil { f?GoBh<
public final static int INSERT = 1; $ve$Sq
public final static int BUBBLE = 2; i[FYR;C
public final static int SELECTION = 3; ~]?EV?T
public final static int SHELL = 4; KydAFxUb
public final static int QUICK = 5; \T<F#a
public final static int IMPROVED_QUICK = 6; i;]# @n|
public final static int MERGE = 7; 5`Uzxu
public final static int IMPROVED_MERGE = 8; DKem;_6OQ
public final static int HEAP = 9; jTV4iX
p}/D{|xO
public static void sort(int[] data) { aUc#,t;Qd
sort(data, IMPROVED_QUICK); "-MB U
} a|4D6yUw|
private static String[] name={ n&|N=zh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DcM/p8da
}; T\6,@7
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private static Sort[] impl=new Sort[]{ n<> ^cD
new InsertSort(), (f_J @n
new BubbleSort(), q*Hg-J}
new SelectionSort(), &?5)Jis:
new ShellSort(), B~qo^ppVU
new QuickSort(), i!3*)-a\~`
new ImprovedQuickSort(), \ISg6v{/
new MergeSort(), Le bc@,
new ImprovedMergeSort(), r)Zk-!1
new HeapSort() `/N={
}; uW/>c$*)
[P ;fv
public static String toString(int algorithm){ BzWkZAX
return name[algorithm-1]; ?2,D-3 {
} QXL .4r%
~=[5X,Ta
public static void sort(int[] data, int algorithm) { n4 N6]W\5
impl[algorithm-1].sort(data); 'o0o.&/=
} yIngenr$
bT T>
public static interface Sort { 6biR5&Y5U&
public void sort(int[] data); 2$!,$J-<Y
} es%py~m)
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public static void swap(int[] data, int i, int j) { Q2woCxB
int temp = data; Lpkx$QZ
data = data[j]; #;@I.
data[j] = temp; a$^)~2U{
} Pw7uxN`
} P,WQN[(+