[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; <-k!
} [uU!\xe
int i1=l; 3q'AgiW
int i2=mid+1; <kFLwF?PM'
for(int cur=l;cur<=r;cur++){ _;03R{e*
if(i1==mid+1) l^&#9d
data[cur]=temp[i2++]; k^Qf |
else if(i2>r) M/6Z,oOU
data[cur]=temp[i1++]; d9$RmCHe}
else if(temp[i1] data[cur]=temp[i1++]; /-p!|T}w
else -g~+9/;n
data[cur]=temp[i2++]; f7a4E+}
} _94 W@dW
} ;v.[aq
1*=ev,Z
} \I!mzo
C=+9XfP0
改进后的归并排序: '|4+<#
E@ :9|5
package org.rut.util.algorithm.support; 5VV}wR
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import org.rut.util.algorithm.SortUtil; %C_tBNE<
M<Wi:r:
/** Q7uJ9Y{X
* @author treeroot X8*g#lO?
* @since 2006-2-2 uHI(-!O
* @version 1.0 cp@Fj"
*/ ?CAU+/
public class ImprovedMergeSort implements SortUtil.Sort { x{:U$[_
|H t5a.
private static final int THRESHOLD = 10; 9InP2u\&:
fc+-/!v
/* Xd+H()nR
* (non-Javadoc) ]u5TvI,C
* geR :FO;\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kK=VG< :M
*/ 8QTry%
public void sort(int[] data) { R0=f`;
int[] temp=new int[data.length]; y5sH7`2+5
mergeSort(data,temp,0,data.length-1); Gk~aTO
} 4fKvB@O@.
q8$t4_pF
private void mergeSort(int[] data, int[] temp, int l, int r) { &|XgWZS5
int i, j, k; 9:{<:1?
int mid = (l + r) / 2; ?1ey$SSU]
if (l == r) sLA.bp.O
return; >\1twd{u]
if ((mid - l) >= THRESHOLD) zdwQpB,+^
mergeSort(data, temp, l, mid); aE'nW_f
else 4+hNP'e
insertSort(data, l, mid - l + 1); FXr^ 4B}
if ((r - mid) > THRESHOLD) 7"Xy8]i{z
mergeSort(data, temp, mid + 1, r); nDvfb*\
else d7kE}{,
insertSort(data, mid + 1, r - mid); oSrA4g
>3/mV<g f
for (i = l; i <= mid; i++) { _5Lcr)
temp = data; W_wC"?A%
} }p?,J8=-
for (j = 1; j <= r - mid; j++) { +1wEoU.l2
temp[r - j + 1] = data[j + mid]; *R+M#l9D`
} ~a_hOKU5
int a = temp[l]; ;:=j{,&dl[
int b = temp[r]; FC+-|1?C
for (i = l, j = r, k = l; k <= r; k++) { 4vL\t uoz
if (a < b) { ;[ QIHA!
data[k] = temp[i++]; yr},pB
a = temp; rCa]T@=
} else { >aJmRA-C}
data[k] = temp[j--]; F2zo !a8
b = temp[j]; 'ij+MU1
} sFZdj0tQ4
} QyA^9@iVs
} Vl$RMW@Ds
dXDyY
/** 9 5!xJdq
* @param data Q.$/I+&j
* @param l R7IFlQH%
* @param i h*^JFZb
*/ dUB;ZB7
private void insertSort(int[] data, int start, int len) { iJh{,0))g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z@UH[>^gj
} M5*Ln-qt(a
} ]foS.D,
} c k[uvH
} 1?)h-aN
Ew]&~:$Ki
堆排序： +mG"m hF
MX*4d{l
package org.rut.util.algorithm.support; ,&,XcbJ
V9ZM4.,OCN
import org.rut.util.algorithm.SortUtil; Z wKX$(n
UK'8cz9
/** yuq o ^i
* @author treeroot M.SF}U
* @since 2006-2-2 k_1;YOBF
* @version 1.0 7&etnQJ{
*/ d?5oJ'JU
public class HeapSort implements SortUtil.Sort{ ;|\j][A
l^tRy_T:-
/* (non-Javadoc) BSkmFd(*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Md9y:)P@Y
*/ !`H!!Kg0L
public void sort(int[] data) { p1GP@m,^n0
MaxHeap h=new MaxHeap(); P7X3>5<;q
h.init(data); H9;IA>
for(int i=0;i h.remove(); (3K,f4S@
System.arraycopy(h.queue,1,data,0,data.length); eF0FQlMe[
} modem6#x'
,ZYPffu<*
private static class MaxHeap{ nql{k/6
HOPl0fY$L
void init(int[] data){ )C\/(
this.queue=new int[data.length+1]; a_VWgPVdDS
for(int i=0;i queue[++size]=data; ]#S<]vA
fixUp(size); m1K4_a)^[
} E>|fbaN-%
} L;Ynq<x
4F -<j!
private int size=0; xqDz*V/mD
x!7!)]h
private int[] queue; U0W2
S6JWsi4C:,
public int get() { ]:n9MFv
return queue[1]; =~,2E;#X
} 0e:j=kd)NH
pL*aU=FjQ
public void remove() { c<Ud[x.
SortUtil.swap(queue,1,size--); 1JOoICjB
fixDown(1); >`yRL[c;
} [k%u$
file://fixdown $E8}||d
private void fixDown(int k) { C%%gCPI^y
int j; sA+K?_
while ((j = k << 1) <= size) { +~1FKLu
if (j < size %26amp;%26amp; queue[j] j++; ;i [;%
if (queue[k]>queue[j]) file://不用交换 oFzmH!&ED
break; Fo0s<YlS-
SortUtil.swap(queue,j,k); SgN?[r)
k = j; WS@"8+re;
} EIpz-"S
} EZp >Cf7
private void fixUp(int k) { ;eW)&qzK
while (k > 1) { BEAY}P(y3
int j = k >> 1; q&:%/?)x
if (queue[j]>queue[k]) wZ`*C mr
break; d&ff1(j(
SortUtil.swap(queue,j,k); !F Zg' 9
k = j; R%9,.g<
} p9MJa[}V
} LOwd mj
<|E*aR|M
} f"4w@X2F
#7YJ87<E
} F{ C2% s#
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SortUtil： Z;;A#h'%e
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package org.rut.util.algorithm; #oR@!?
S`TQWWQo;
import org.rut.util.algorithm.support.BubbleSort; CFoR!r:X
import org.rut.util.algorithm.support.HeapSort; \IqCC h
import org.rut.util.algorithm.support.ImprovedMergeSort; 4l>d^L
import org.rut.util.algorithm.support.ImprovedQuickSort; :N_DJ51
import org.rut.util.algorithm.support.InsertSort; (bB"6 #TI
import org.rut.util.algorithm.support.MergeSort; Ue>{n{H"y
import org.rut.util.algorithm.support.QuickSort; ;R@D
import org.rut.util.algorithm.support.SelectionSort; Bob-qCBV
import org.rut.util.algorithm.support.ShellSort; m|OB_[9
(Y^tky$9
/** i If?K%M7
* @author treeroot _S-@|9\&#
* @since 2006-2-2 Otf{)f
* @version 1.0 `z7,HJ.0c
*/ O{U j
public class SortUtil { Tgbq4xR(
public final static int INSERT = 1; kN#3HI]8
public final static int BUBBLE = 2; H9!q)qlK
public final static int SELECTION = 3; *=T(ncR['
public final static int SHELL = 4; NnU`u.$D
public final static int QUICK = 5; vWa\8yf
public final static int IMPROVED_QUICK = 6; 4_$.gO
public final static int MERGE = 7; K7nyQGS
public final static int IMPROVED_MERGE = 8; > +00[T
public final static int HEAP = 9; _]eyt_
qmvQd8|XR
public static void sort(int[] data) { N\rL ~4/
sort(data, IMPROVED_QUICK); h b8L[ 4
} y3PrLBTz
private static String[] name={ i1bmUKZ8'L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }-u%6KZ
}; ?a1pO#{Dg
(qz)3Fa
private static Sort[] impl=new Sort[]{ ~mMTfC~9
new InsertSort(), lJT"aXt'M
new BubbleSort(), 'P[#.9E
new SelectionSort(), "{Y6.)x
new ShellSort(), wTG(U3{3K
new QuickSort(), /?Mr2!3N
new ImprovedQuickSort(), Z aS29}
new MergeSort(), 8Kk41=
new ImprovedMergeSort(), TZ!@IBu
new HeapSort() o/n4M]G
}; -8<vWe
HIC!:|
public static String toString(int algorithm){ WJ[>p ELT,
return name[algorithm-1]; aUA)p}/:
} & d$X:
PrA(==FX/
public static void sort(int[] data, int algorithm) { Gzg3{fXl
impl[algorithm-1].sort(data); ]]3rSXs2}J
} ~P;A 9A(k
x;Slv(|M
public static interface Sort { ,|.}6\zl*{
public void sort(int[] data); tV>qV\>
} e0otr_)3F
m7u`r(&
public static void swap(int[] data, int i, int j) { n=AcN
int temp = data; D!.1R!(Z
data = data[j]; U%[ye0@:
data[j] = temp; nAAv42j[
} aql8Or1[
} ?:-:m'jdU