[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; jz$)*Kdi*
} -< 7KW0CA
int i1=l; OZ q/'*
int i2=mid+1; WbS2w @8
for(int cur=l;cur<=r;cur++){ x=qACoq
if(i1==mid+1) jBEt!Azur
data[cur]=temp[i2++]; XRI1/2YA
else if(i2>r) kl|KFdA;
data[cur]=temp[i1++]; AX%9k
else if(temp[i1] data[cur]=temp[i1++]; :!1B6Mc
else yVxR||e
data[cur]=temp[i2++]; ]*^mT&$7
} 5|-(Ic
} G2kr~FG
4\?I4|{pC
} ujcNSX*
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改进后的归并排序: V&_5q`L
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package org.rut.util.algorithm.support; (*%+!PS
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import org.rut.util.algorithm.SortUtil; xnu|?;.}!
+MQf2|--
/** A;h0BQm/j
* @author treeroot 3yXF| yV
* @since 2006-2-2 sf?D4UdIH
* @version 1.0 ~2~KcgPsq
*/ S[NV-)r=
public class ImprovedMergeSort implements SortUtil.Sort { oS$&jd
oj<.axA,
private static final int THRESHOLD = 10; XTyn[n
8*)zoT*A
/* )E^4\3^:
* (non-Javadoc) Ckvm3r\i2
* mB#`{|1[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;X\>oV3#
*/ u9>.x zYG
public void sort(int[] data) { "wxs
int[] temp=new int[data.length]; q]5"V>D \
mergeSort(data,temp,0,data.length-1); FI~)ZhE)]
} QHsS|\u
6[c LbT0
private void mergeSort(int[] data, int[] temp, int l, int r) { $+ZO{ (
int i, j, k; DnaG$a<
int mid = (l + r) / 2; /v;g v[
if (l == r) C did*hxJ
return; o)?"P;UhJX
if ((mid - l) >= THRESHOLD) q[q#cY:0
mergeSort(data, temp, l, mid); slHlfWHq
else L"tj DAV
insertSort(data, l, mid - l + 1); ^?toTU
if ((r - mid) > THRESHOLD) _q=$L eO5
mergeSort(data, temp, mid + 1, r); c?eV8h1G
else 'mug,jM
insertSort(data, mid + 1, r - mid); ,I@4)RSAH|
"^<:7_Y
for (i = l; i <= mid; i++) { r[M]2h
temp = data; '8k\a{t_z
} (1(3:)@S6
for (j = 1; j <= r - mid; j++) { q?Q"Ab
temp[r - j + 1] = data[j + mid]; n\*>mp)
} *`);_EVc
int a = temp[l]; 42Vy#t/HC
int b = temp[r]; *s?&)][
for (i = l, j = r, k = l; k <= r; k++) { 8{JTR|yB
if (a < b) { : Ot\l
data[k] = temp[i++]; h.4;-&
a = temp; oRy?Dx+H
} else { J*,Ed51&7
data[k] = temp[j--]; c1CP12
b = temp[j]; Z5-"a?{Y
} _QBd3B%
} 8+ B.x
} bg_Zf7{
UY{ Uo@k9x
/** $1\<>sJH
* @param data \p@,+ -gX
* @param l ahS*YeS7
* @param i L|6clGp
*/ JeUFCWm
private void insertSort(int[] data, int start, int len) { aiw~4ix
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nf/iZ &
} %nOBsln
} 68)z`JI|<)
} KzeA+PI
} (LRv c!`"
jfqWcX.X=
堆排序： O`t ]#
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package org.rut.util.algorithm.support; C+r--"Z
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import org.rut.util.algorithm.SortUtil; RURO0`^
P!B\:B%4~]
/** zi[bpa17W
* @author treeroot >eAlz4
* @since 2006-2-2 LD_aJ^(d
* @version 1.0 V)Z*X88:Tv
*/ BIbcm,YQ
public class HeapSort implements SortUtil.Sort{ uTP=kgYqJ
s4MP!n?gB
/* (non-Javadoc) PM=I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SP HeI@i
*/ ~LO MwMHl
public void sort(int[] data) { vCbqZdy?
MaxHeap h=new MaxHeap(); 4p>@UB&U
h.init(data); 9Wx q
for(int i=0;i h.remove(); 5 ;dg#hO
System.arraycopy(h.queue,1,data,0,data.length); HQ@X"y n
} gl.P#7X
2d<ma*2n(
private static class MaxHeap{ '$1-A%e$1
%>xW_5;Z
void init(int[] data){ .b N0!
this.queue=new int[data.length+1]; "Oh-`C
for(int i=0;i queue[++size]=data; $CL=M
fixUp(size); Yq`r>g
} #5G!lbH
} [ "J
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private int size=0; uA:;OM}
RXl52#:
private int[] queue; X@af[J[cQ
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public int get() { a/L?R Uu
return queue[1]; ?@_3B]Fs
} 39"8Nq|e
\+Qx}bS{
public void remove() { j*W]^uT,
SortUtil.swap(queue,1,size--); N[aK#o,
fixDown(1); {x2N~1!E
} [_-CO}>
file://fixdown vj?9X5A_
private void fixDown(int k) { HEjV7g0E
int j; D\j1`
while ((j = k << 1) <= size) { -U%wLkf|
if (j < size %26amp;%26amp; queue[j] j++; G:u[Lk#6K
if (queue[k]>queue[j]) file://不用交换 /d'^XYOC
break; ,D ;`t
SortUtil.swap(queue,j,k); ,589/xTA@
k = j; @YpA'cX7
} *tz"T-6O
} 'OBAnE<.
private void fixUp(int k) { K{M_ 4'\
while (k > 1) { @] )a
int j = k >> 1; "-v9V7KCM
if (queue[j]>queue[k]) g"#R>&P
break; m'aw`?
SortUtil.swap(queue,j,k); T{sw{E*
k = j; K Qub%`n
} a5Xr"-
} ET=q 1t8
quGb;)3
} BR5$;-7W
wg!
} ;EL!TzL:8
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SortUtil： zFB$^)v"<
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package org.rut.util.algorithm; 1__p1
R8o9$&4_
import org.rut.util.algorithm.support.BubbleSort; En5I
import org.rut.util.algorithm.support.HeapSort; bB)EJCPq>
import org.rut.util.algorithm.support.ImprovedMergeSort; g[H7.
import org.rut.util.algorithm.support.ImprovedQuickSort; ;\Wg>sq
import org.rut.util.algorithm.support.InsertSort; ]7dm`XV
import org.rut.util.algorithm.support.MergeSort; {r'#(\
import org.rut.util.algorithm.support.QuickSort; /Pg66H#RUf
import org.rut.util.algorithm.support.SelectionSort; nfrC@Av
import org.rut.util.algorithm.support.ShellSort; C@]Z&H;
1|z>} xP
/** ut-UTW
* @author treeroot gyI5;il~
* @since 2006-2-2 %@H;6
* @version 1.0 4^AE;= Q
*/ "=yaeEp
public class SortUtil { v,+2CVdW
public final static int INSERT = 1; 2&$A x
public final static int BUBBLE = 2; qMI%=@=
public final static int SELECTION = 3; J#:%| F%
public final static int SHELL = 4; x:sTE u@
public final static int QUICK = 5; Bj%{PK
public final static int IMPROVED_QUICK = 6; %\r4c*O1q
public final static int MERGE = 7; 1!vR 8.
public final static int IMPROVED_MERGE = 8; (O&ooM* o
public final static int HEAP = 9; P}?,*'b
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public static void sort(int[] data) { TmzEZ<} &7
sort(data, IMPROVED_QUICK); x,>@IEN7
} zpg*hlv
private static String[] name={ 9-bDgzk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H~||]_q|
}; [0MVsc=
*QAK9mc
private static Sort[] impl=new Sort[]{ Z[0xqGYLB
new InsertSort(), Qs;bVlp!H
new BubbleSort(), !Otyu6&
new SelectionSort(), #[I`VA\x
new ShellSort(), hz\7Z+$L_
new QuickSort(), gR~XkU
new ImprovedQuickSort(), 42# rhgW
new MergeSort(), !30Dice
new ImprovedMergeSort(), 5p=T*Y
new HeapSort() z4{|?0=C
}; Eer rIV
v9M;W+J
public static String toString(int algorithm){ q ,}W.
return name[algorithm-1]; J,+| Fb
} }ZvL%4jT
Bz7T1B&to
public static void sort(int[] data, int algorithm) { $+7MY-9T
impl[algorithm-1].sort(data); T-|z18|!
} Zf?>:P
o1I{^7/
public static interface Sort { "MK:y[+*
public void sort(int[] data); LRB#|PW
} (kb^=kw#0
`;QpPSw+
public static void swap(int[] data, int i, int j) { |3"'>* J
int temp = data; rC/m}`b
data = data[j]; ]_F%{8|
data[j] = temp; wCn W]<+
} ~p8-#A)X,)
} <A"}Krq?