[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; %YsRm%q
} `\6+z
int i1=l; WIhIEU7/
int i2=mid+1; !;6W!%t.|
for(int cur=l;cur<=r;cur++){ D]3bwoFo&u
if(i1==mid+1) h:eN>yW
data[cur]=temp[i2++]; 9iiU,}M`j
else if(i2>r) q oKQEG2
data[cur]=temp[i1++]; 3ytx"=B%
else if(temp[i1] data[cur]=temp[i1++]; 99=[>Ck)G
else K7YT0cG
data[cur]=temp[i2++]; Vu^Q4Z
} U!3uaz'
} lU>)n
.oW~:mY
} S8rW'}XJ=H
zSX'
改进后的归并排序: Jc9@VxWY
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package org.rut.util.algorithm.support; _CYmG"mY
Ej9/_0lt
import org.rut.util.algorithm.SortUtil; ([z<TS#Md
Lcm~QF7cd
/** E0WrpGZ
* @author treeroot C"V?yDy2~
* @since 2006-2-2 Phk`=:xh
* @version 1.0 .je~qo)
*/ hv_pb#1Ks
public class ImprovedMergeSort implements SortUtil.Sort { 0Te)s3X
S.?\>iH[
private static final int THRESHOLD = 10; l#<}|b
3(XHF3q
/* 4@ydK
* (non-Javadoc) o)$Q]N##
* MC[`<W)u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I{Y {
*/ s0`]!7D<
public void sort(int[] data) { _AsHw
int[] temp=new int[data.length]; '=@H2T6=
mergeSort(data,temp,0,data.length-1); h|Teh-@A5
} EusfgU:
E:LQ!
private void mergeSort(int[] data, int[] temp, int l, int r) { %s&E-*X
int i, j, k; JXD?a.vy^q
int mid = (l + r) / 2; \I`=JKYT
if (l == r) 3HDnOl8t
return; qJAv=D
if ((mid - l) >= THRESHOLD) C$]%1<-Iv]
mergeSort(data, temp, l, mid); K[3D{=
else b*F :l#
insertSort(data, l, mid - l + 1); H8Z Z@@ qm
if ((r - mid) > THRESHOLD) _sCJ3ZJ
mergeSort(data, temp, mid + 1, r); e P,XH{s
else #xJGuYdv
insertSort(data, mid + 1, r - mid); cxF?&0[mY
/d]V{I~6
for (i = l; i <= mid; i++) { V+@%(x@D_
temp = data; WEY97_@
} Q,`2DHhK
for (j = 1; j <= r - mid; j++) { olQ8s*
temp[r - j + 1] = data[j + mid]; `!>dbR&1
} S<bz7 k9
int a = temp[l]; j@_) F^12
int b = temp[r]; ^|hRu{QW
for (i = l, j = r, k = l; k <= r; k++) { zi DlJ3]^
if (a < b) { o\:f9JL
data[k] = temp[i++]; Y|qixpP
a = temp; b&V]|Z(
} else { Kr}M>hF+|
data[k] = temp[j--]; +8@`lDnr
b = temp[j]; 7AFS)_w
} %?9r(&
} |?t8M9[Z
} K {1ZaEH
&4Iqm(
/** lN`_0
* @param data +68K[s,FD
* @param l Cx3m\ \c
* @param i -aeo7C
*/ _)Z7Le:f!
private void insertSort(int[] data, int start, int len) { :"+UG-S$6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r)@&2b"q
} !O-_Dp\#
} 6+f>XL#w
} D``NQ`>A
} SAxa7B/U2
8KELN(o$ 7
堆排序： 2;(iTPz +
uW-- nXMs
package org.rut.util.algorithm.support; 'LLQ[JJ=O
cZX&itVc:
import org.rut.util.algorithm.SortUtil; xS\QKnG.
sq(063l
/** 0gb]Kjx
* @author treeroot n#L2cv~Aj"
* @since 2006-2-2 S%gO6&^
* @version 1.0 V1b_z
*/ gl\$jDC9
public class HeapSort implements SortUtil.Sort{ G mUs U{
f;XsShxr
/* (non-Javadoc) Y l3[~S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4bJ2<j
*/ 7te!>gUW
public void sort(int[] data) { _(kwD^x6O{
MaxHeap h=new MaxHeap(); {Ljl4Sp&
h.init(data); 6l]?%0[*
for(int i=0;i h.remove(); 8\V>6^3CD$
System.arraycopy(h.queue,1,data,0,data.length); +FKP5L}
} 64?$TT
Ac(irPrD
private static class MaxHeap{ 1eyyu!
<UHWy&+z&
void init(int[] data){ -/7=\kao%
this.queue=new int[data.length+1]; ]4Yb$e`
for(int i=0;i queue[++size]=data; l \n:"*To
fixUp(size); JOne&{h]J"
} .O-DVW Cm
} /ZN5WK
j#>![km Mu
private int size=0; F*( A; N_y
)"3oe?
private int[] queue; =ZIFS
dv}R]f'
public int get() { 1Kf t?g
return queue[1]; T:~W.3
} 7MJ)p$&
mb`}sTU).
public void remove() { VP[!ji9P
SortUtil.swap(queue,1,size--); WK)k-A^q
fixDown(1); Nl)jQ
} x[@3;_'K
file://fixdown @O0vh$3t0
private void fixDown(int k) { !4.^@^L|\
int j; uqeWdj*Y
while ((j = k << 1) <= size) { 5)NfZN#&
if (j < size %26amp;%26amp; queue[j] j++; 1% %Tm"
if (queue[k]>queue[j]) file://不用交换 r_Yl/WW
break; Z4zMa&
SortUtil.swap(queue,j,k); >b](v)
k = j; X.Y)'qSf
} +~.Jw#HqS
} J` --O(8Ml
private void fixUp(int k) { I2!HXMrp
while (k > 1) { 0]0M>vx u
int j = k >> 1; N^`Efpvg
if (queue[j]>queue[k]) /j\TmcnU^
break; qc"/T16M]
SortUtil.swap(queue,j,k); KCT"a:\
k = j; SFNd,(kB*z
} PH&ms
} 19`0)pzZ*P
buyz>ICP
} J0bs$
*n?:)(
} <$6E r
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SortUtil： Fpwh.R:yV
. L%@/(r
package org.rut.util.algorithm; \1_&?(pU
A8Y~^wn
import org.rut.util.algorithm.support.BubbleSort; D];([:+4
import org.rut.util.algorithm.support.HeapSort; 6RodnQ
import org.rut.util.algorithm.support.ImprovedMergeSort; L KR,CPz
import org.rut.util.algorithm.support.ImprovedQuickSort; FEswNB(]*
import org.rut.util.algorithm.support.InsertSort; nE%qm -
import org.rut.util.algorithm.support.MergeSort; Vo8"/]_h
import org.rut.util.algorithm.support.QuickSort; _I5+o\;1
import org.rut.util.algorithm.support.SelectionSort; HjR<4;2
import org.rut.util.algorithm.support.ShellSort; "evV/Fg(
%,RU)}
/** l6Bd<tSH
* @author treeroot D$ z!wV
* @since 2006-2-2 8}@a?QS(&
* @version 1.0 D8XXm lo
*/ >(a_9l;q
public class SortUtil { GdY^}TJrh
public final static int INSERT = 1; #+nv,?@
public final static int BUBBLE = 2; {u3u%^E;R
public final static int SELECTION = 3; 4`]1W,t
public final static int SHELL = 4; mq9&To!
public final static int QUICK = 5; .?:~s8kB
public final static int IMPROVED_QUICK = 6; xc3Q7u!|
public final static int MERGE = 7; .JjuY'-Q
public final static int IMPROVED_MERGE = 8; ghiElsBU
public final static int HEAP = 9; syvi/6
8 EH3zm4
public static void sort(int[] data) { a@1gMZc*
sort(data, IMPROVED_QUICK); 9Ua@-
} FgaBwd^W
private static String[] name={ r6G)R+#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "rJL ^ \r
}; h 42?^mV4?
c?S402M}
private static Sort[] impl=new Sort[]{ Xw5"JE!.
new InsertSort(), ,_O[;L
new BubbleSort(), MLX.MUS
new SelectionSort(), f;a6ux#
new ShellSort(), VTa8.(i6v
new QuickSort(), `BY`ltW
new ImprovedQuickSort(), &Y$rVBgQ
new MergeSort(), Q5JeL6t
new ImprovedMergeSort(), K2Zy6lGOZ
new HeapSort() |{Q,,<C
}; ^;bkU|(`6
24fWj?A|^
public static String toString(int algorithm){ +a;j>hh
return name[algorithm-1]; 9 |Y?#oZ1
} >sq9c/}X
K.~U%v}
public static void sort(int[] data, int algorithm) { &h-1Z}
impl[algorithm-1].sort(data); 3WS %H17
} 50A_+f.7%
B%/Pn 2
public static interface Sort { I%`2RXBt3^
public void sort(int[] data); &D#v0!e~x
} 1;V5b+b
107SXYdhI
public static void swap(int[] data, int i, int j) { wDk[)9#A
int temp = data; RZjR d
data = data[j]; q[lqEc
data[j] = temp; K(^x)w r-:
} +FR"Gt$g
} xAflcY>Ozs