[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; |I/,F;'
} ,N0uR@GN
int i1=l; )8bFGX7|
int i2=mid+1; @bY?$fj_u
for(int cur=l;cur<=r;cur++){ c G*(C
if(i1==mid+1) O*ImLR)i+s
data[cur]=temp[i2++]; 1M=
else if(i2>r) 3~:0?Zuq
data[cur]=temp[i1++]; t,1in4sN
else if(temp[i1] data[cur]=temp[i1++]; "kU>~~y,
else hLSTSD}
data[cur]=temp[i2++]; G#'Q~N
} jF4csO=E
} (>mi!:
UIz:=DJ
} '6+Edu~Ho)
j;G[%gi6{
改进后的归并排序: db^aL8
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package org.rut.util.algorithm.support; yqYhe-"
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import org.rut.util.algorithm.SortUtil; OZa88&
PaxK^*
/** TZj[O1E
* @author treeroot UDVf@[[hN
* @since 2006-2-2 )7k&`?Mh
* @version 1.0 l:q8Pg)
*/ T G_bje
public class ImprovedMergeSort implements SortUtil.Sort { CJv>/#$/F
xM%`KP.8X
private static final int THRESHOLD = 10; Rnzqw,q
T!1SMo^
/* UKOFT6|
* (non-Javadoc) qP&byEs"
* !e&rVoA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )`mbf|,&t{
*/ {:,_A
public void sort(int[] data) { & &6*ez
int[] temp=new int[data.length]; luibB&p1
mergeSort(data,temp,0,data.length-1); :Jjw"}SfK#
} IX"ZS
AvyQ4xim+
private void mergeSort(int[] data, int[] temp, int l, int r) { _O"L1Let
int i, j, k; C1KfXC*|L
int mid = (l + r) / 2; B>sCP"/uV
if (l == r) 8W;xi:CC
return; sr;:Dvx~
if ((mid - l) >= THRESHOLD) Y~:}l9Qs
mergeSort(data, temp, l, mid); B;SzuCW
else 3mk=ZWwv
insertSort(data, l, mid - l + 1); Ap%d<\,Z
if ((r - mid) > THRESHOLD) 7Pwg+|
mergeSort(data, temp, mid + 1, r); qw|JJ
else tCX9:2c
insertSort(data, mid + 1, r - mid); -MDOZz\
)@!~8<_"
for (i = l; i <= mid; i++) { HOq4i!
temp = data; 5/tj
} /731.l
for (j = 1; j <= r - mid; j++) { J`YnT
temp[r - j + 1] = data[j + mid]; v#iFQVBq
} Cy<T Vk8
int a = temp[l]; L'13BRu`
int b = temp[r]; &S<?07Z
for (i = l, j = r, k = l; k <= r; k++) { x)j/
if (a < b) { SOhSg]g
data[k] = temp[i++]; ax<g0=^R
a = temp; LE8K)i
} else { w~4 z@/^"p
data[k] = temp[j--]; =x=1uXQv5
b = temp[j]; yQ8M >H#J
} ;&If9O1
} O;UiYrXU
} #m[vn^8B]y
@55bE\E?@
/** ^I@ey*$
* @param data `E{;85bDH
* @param l anK[P'Y
* @param i (~=Qufy
*/ 'CS^2Z
private void insertSort(int[] data, int start, int len) { mr@_%U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ftO+.-sm<
} {-o7w0d_
} D}mo\
} F='Xj@&O
} ;&K3[;a
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堆排序： EfFj!)fz
F#jCEq
package org.rut.util.algorithm.support; y=-{Q
A(q~{
import org.rut.util.algorithm.SortUtil; =*{K@p_
B"7$!Co
/** ^Vl^,@
* @author treeroot `x2fp6
* @since 2006-2-2 W8Ke1(ws&
* @version 1.0 ^?E^']H)5u
*/ '&RZ3@}+
public class HeapSort implements SortUtil.Sort{ `kqT{fs
d|>9rX+f
/* (non-Javadoc) c zZrP"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I h5/=_n
*/ :|?~B%-p[
public void sort(int[] data) { 5OPS&:
MaxHeap h=new MaxHeap(); ?+bTPl;%'
h.init(data); Tf9&,!>V
for(int i=0;i h.remove(); 2dv|6p
System.arraycopy(h.queue,1,data,0,data.length); +F1]M2p]
} qJsQb
`K$:r4/[
private static class MaxHeap{ bq c;.4$
/Lq;w'|I
void init(int[] data){ x%b]ea
this.queue=new int[data.length+1]; b%=1"&JI:
for(int i=0;i queue[++size]=data; {[l'S
fixUp(size); t9-_a5>E\}
} w~bG<kxP
} zd?bHcW/h
$~ pr+Ei
private int size=0; " 7l jc
F?}m8ZRv
private int[] queue; j09mI$2y67
5Z^$`$/.v#
public int get() { 6&g!ZE'G
return queue[1]; 38"8,k
} #B}BI8o (
e7Yb=/F
public void remove() { M\:"~XW
SortUtil.swap(queue,1,size--); ?whRlh
fixDown(1); 3c1o,2
} 2z.k)Qx!Z
file://fixdown ^AovkK(p
private void fixDown(int k) { 0lLr[
int j; Wwn5LlJ^
while ((j = k << 1) <= size) { 0z#l0-NdQ
if (j < size %26amp;%26amp; queue[j] j++; k$9Gn9L%
if (queue[k]>queue[j]) file://不用交换 2N6Pa(6
break; [{6&.v
SortUtil.swap(queue,j,k); vG'vgUo
k = j; pKOT Qf
} H j>L>6>
} d_4n0Kh0
private void fixUp(int k) { ;n yB
while (k > 1) { *T.={>HE8
int j = k >> 1; RM?_15m
if (queue[j]>queue[k]) rnzsfr-|(2
break; |u?k-,uI9
SortUtil.swap(queue,j,k); Y}V)4j
k = j; !mw{T D
} {q5hF5!`)
} o`<h=+a\
9Q SUCN_
} S+` !%hJ
K9x*Sep
} d&GKfF
y)N.LS
SortUtil： asm[-IB2u
\GjXsR*b5
package org.rut.util.algorithm; ,Ut!u)
UDIac;vT
import org.rut.util.algorithm.support.BubbleSort; {GGO')p
import org.rut.util.algorithm.support.HeapSort; &5kjjQ*HB
import org.rut.util.algorithm.support.ImprovedMergeSort; <a4iL3
import org.rut.util.algorithm.support.ImprovedQuickSort; /ieu)m:2
import org.rut.util.algorithm.support.InsertSort; ^L*VW gi9
import org.rut.util.algorithm.support.MergeSort; [#H8=
import org.rut.util.algorithm.support.QuickSort; )w}*PL
import org.rut.util.algorithm.support.SelectionSort; e3HF"v]2!
import org.rut.util.algorithm.support.ShellSort; fzGZ:L
!5g)3St
/** 4wM$5
* @author treeroot j`LT`p"9S
* @since 2006-2-2 9hz7drhR;\
* @version 1.0 oHP>v_X
*/ ?z4uze1
public class SortUtil { ^c;skV&S
public final static int INSERT = 1; (HTk;vbZm
public final static int BUBBLE = 2; %k1q4qOG]^
public final static int SELECTION = 3; oKMg7 3*
public final static int SHELL = 4; ?kT~)k
public final static int QUICK = 5; IdQwLt
public final static int IMPROVED_QUICK = 6; NO0[`jy(
public final static int MERGE = 7; ey9fbS ^I
public final static int IMPROVED_MERGE = 8; f:)K
public final static int HEAP = 9; tZJ 9}\r
0qaG#&!
public static void sort(int[] data) { `#IT24!
sort(data, IMPROVED_QUICK); 2Wc;hJ.1
} *aSRKY
private static String[] name={ &CPe$'FYI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Og%zf1)aZM
}; eAenkUBz6,
e\|E; l
private static Sort[] impl=new Sort[]{ 45!`g+)
new InsertSort(), S+e-b'++?
new BubbleSort(), 0SGczgg
new SelectionSort(), w oY)G7%
new ShellSort(), }E)8soQR
new QuickSort(), *$WiJ3'(m
new ImprovedQuickSort(), #h5Hi9LKf
new MergeSort(), -mWw.SfEZ
new ImprovedMergeSort(), <R]Wy}2-
new HeapSort() $F /p8AraK
}; Y GcY2p<
!513rNO
public static String toString(int algorithm){ Wpg?%+Y
return name[algorithm-1]; Z?G3d(YT
} 01SFOPuR%(
9g^./k\8%
public static void sort(int[] data, int algorithm) { N#xM_Mpt
impl[algorithm-1].sort(data); w4&v( m
} 5p>]zij>
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public static interface Sort { TTw~.x,
public void sort(int[] data); }@Ll!,
} L>R!A3G1
1{uDHB
public static void swap(int[] data, int i, int j) { JY,l#?lM{
int temp = data; ,R9f;BR
data = data[j]; @_tA"E
data[j] = temp; D4x'
} dT0z^SG
} Zqe[2()