[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; geru=7
} Z^3rLCa
int i1=l; m*&]!mM"0G
int i2=mid+1; ?9 <:QE;I>
for(int cur=l;cur<=r;cur++){ aTH{'mN
if(i1==mid+1) +$ 'Zf0U
data[cur]=temp[i2++]; &u$Q4
else if(i2>r) 'DP1,7
data[cur]=temp[i1++]; 75T%g!c#
else if(temp[i1] data[cur]=temp[i1++]; u^^[Q2LDU}
else 5_GYrR2
data[cur]=temp[i2++]; M\uiq38
} {$0mwAOH "
} DX#Nf""Pw
<cps2*'
} dqU~`b9
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改进后的归并排序: n]._uza
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package org.rut.util.algorithm.support; fDv2JdiU
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import org.rut.util.algorithm.SortUtil; <FV1Wz
G#ZH.24Y
/** \V;F/Zy(
* @author treeroot jys:5P
* @since 2006-2-2 =W(Q34
* @version 1.0 ha]VWt%}
*/ WlOmJtt4)
public class ImprovedMergeSort implements SortUtil.Sort { |3(' N#|
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private static final int THRESHOLD = 10; )1?y 8_B
3Z>Ux3[
/* cuax;0{%
* (non-Javadoc) X8Bd3-B
* Ytn9B}%o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KI"#f$2&
*/ Z9v31)q(
public void sort(int[] data) { [_BP)e
int[] temp=new int[data.length]; d[iQ`YW5
mergeSort(data,temp,0,data.length-1); g|o,uD
} x]}^v#
y8]B:_iU9
private void mergeSort(int[] data, int[] temp, int l, int r) { k =>oO9`
int i, j, k; .YtKS
int mid = (l + r) / 2; w'>pY
if (l == r) R$R*'l
return; \1k79c
if ((mid - l) >= THRESHOLD) Hus)c3Ty7
mergeSort(data, temp, l, mid); S,88*F(<^q
else &l}^iP'%!
insertSort(data, l, mid - l + 1); aC]$k'71
if ((r - mid) > THRESHOLD) Tf>bX_L?
mergeSort(data, temp, mid + 1, r); XY5K%dMU
else 'p^t^=dQ
insertSort(data, mid + 1, r - mid); \[;0KV_
5?f ^Rz
for (i = l; i <= mid; i++) { Akq2 d;
temp = data; Z%gh3
} /!0={G
for (j = 1; j <= r - mid; j++) { d-oMQGOklb
temp[r - j + 1] = data[j + mid]; {a =#B)6
} W_JlOc!y
int a = temp[l]; ld[I}88$
int b = temp[r]; tR#OjkvX
for (i = l, j = r, k = l; k <= r; k++) { '+@=ILj>
if (a < b) { akmkyrz'&
data[k] = temp[i++]; #$.;'#u'so
a = temp; ]_)yIi"
} else { em y[k
data[k] = temp[j--]; bTI|F]^!
b = temp[j]; ?e%ZOI
} lt/1f{v[:
} 1y:-N6
} !Lu2
V.U| #n5
/** Z3Og=XHR
* @param data wi!?BCseq
* @param l y5vvu>nd
* @param i R|'ybW'Y
*/ AzPu)
private void insertSort(int[] data, int start, int len) { QFA8N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T~-ycVc
} ,<.V7(|t)
} _5w]a 2
} D ;RiGW4
} |44Ploz2b
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堆排序： ~?l | [
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package org.rut.util.algorithm.support; 1v y*{D
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import org.rut.util.algorithm.SortUtil; ."g`3tVK
B.=FSow
/** pd?Mf=>#
* @author treeroot G0Iw-vf
* @since 2006-2-2 )Om*@;r(
* @version 1.0 Ao 'l"-
*/ -oGdk|Yn
public class HeapSort implements SortUtil.Sort{ td$E/h=3
IYv`IS"
/* (non-Javadoc) x5pdS:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _T60;ZI+^
*/ 'B|JAi?
public void sort(int[] data) { ?d*z8w
MaxHeap h=new MaxHeap(); @@f"%2ZR[
h.init(data); "MeVE#O
for(int i=0;i h.remove(); -abt:or
System.arraycopy(h.queue,1,data,0,data.length); "69s)~
} t5Sy V:fP
KS+'|q<?w
private static class MaxHeap{ Cp\6W[2+B
Dm981t>wL
void init(int[] data){ 10Q ]67
this.queue=new int[data.length+1]; !aUs>1i
for(int i=0;i queue[++size]=data; i$Ul(?
fixUp(size); cZ,b?I"Q%
} wLIMv3;k
} -OV&Md:~
gb1V~
private int size=0; 2Ah#<k-gC;
{p2!|A&a
private int[] queue; +|3@=.V
}dX*[I
public int get() { AI2)g1m
return queue[1]; <sbu;dQ`
} )$2QZ qX
HZE#Ab*L
public void remove() { }FROB/
SortUtil.swap(queue,1,size--); r `=I
fixDown(1); '@v\{ l
} SO/c}vnBB
file://fixdown E:68?IJ
private void fixDown(int k) { @mCEHI{P
int j; !)f\%lb
while ((j = k << 1) <= size) { .^`{1%
if (j < size %26amp;%26amp; queue[j] j++; ~12EQacOT
if (queue[k]>queue[j]) file://不用交换 9cbd~mM{
break; [(i
SortUtil.swap(queue,j,k); ~ah~cwmpS
k = j; B`)BZ,#p
} >58YjLXb
} dFxIF;C>/
private void fixUp(int k) { DeVv4D:}@
while (k > 1) { ),%%$G\
int j = k >> 1; K8|r&`X0
if (queue[j]>queue[k]) ;?Tbnn Wn
break; LVM%"sd?
SortUtil.swap(queue,j,k); %6 zBSje
k = j; 5vQHhwO50k
} s[>,X#7 y
} mthA4sz
n&4N[Qlv,
} <dWv?<o
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} 'ZF{R3Xu
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SortUtil： Wtd/=gmiI
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package org.rut.util.algorithm; :`#d:.@]o@
QO:!p5^:
import org.rut.util.algorithm.support.BubbleSort; /{J4:N'B>
import org.rut.util.algorithm.support.HeapSort; d'gfQlDny
import org.rut.util.algorithm.support.ImprovedMergeSort; F~vuM$+d
import org.rut.util.algorithm.support.ImprovedQuickSort; R_cA:3qc~
import org.rut.util.algorithm.support.InsertSort; yPBZc h%-
import org.rut.util.algorithm.support.MergeSort; Tk[ $5u*,
import org.rut.util.algorithm.support.QuickSort; p$c6<'UqH
import org.rut.util.algorithm.support.SelectionSort; e)k9dOR
import org.rut.util.algorithm.support.ShellSort; VT)oLj/A
e2Pcm_Ahv*
/** q9K)Xk$LF
* @author treeroot qBQ?HLK-
* @since 2006-2-2 G$"h&Xy1c
* @version 1.0 ?4}h&/
*/ xIW3={b3
public class SortUtil { wU36sCo
public final static int INSERT = 1; ~vhE|f
public final static int BUBBLE = 2; BwEN~2u6
public final static int SELECTION = 3; _.Nbt(mz
public final static int SHELL = 4; SHxNr(wJ<Q
public final static int QUICK = 5; wWP}C D
public final static int IMPROVED_QUICK = 6; eQm1cgMdz
public final static int MERGE = 7; (8DC}kckE
public final static int IMPROVED_MERGE = 8; -7[@R;FS
public final static int HEAP = 9; 7F7{)L
RLXL&
public static void sort(int[] data) { ,-LwtePJ0
sort(data, IMPROVED_QUICK); +o{R _
} M/'sl;
private static String[] name={ [S%_In
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bH9kj/q\b
}; |s(FLF-
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private static Sort[] impl=new Sort[]{ nHAS(
new InsertSort(), {]!mrAjD
new BubbleSort(), f}ji?p
new SelectionSort(), d"mkL-
new ShellSort(), n,(sBOQ
new QuickSort(), X7MM2V
new ImprovedQuickSort(), 4he GnMD
new MergeSort(), Zn+.;o)E<
new ImprovedMergeSort(), %XDc,AR[
new HeapSort() HZB>{O
}; P )"m0Lu<
2;`1h[,-^
public static String toString(int algorithm){ b5I I/Y
return name[algorithm-1]; )9G[dDeC
} N)|yu1S
6<SAa#@ey
public static void sort(int[] data, int algorithm) { %lhEM}Sm
impl[algorithm-1].sort(data); \ZFGw&yN
} /{l$sBUL
,4e:I.b
public static interface Sort { G6P?2@
public void sort(int[] data); H5B:;g@
} qJs<#MQ2
L|+~"'l
public static void swap(int[] data, int i, int j) { 286;=rN]*
int temp = data; L#?Ek-
data = data[j]; h8S.x)
data[j] = temp; 4r#= *
} 85$m[+md
} dr}`H,X"3