[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; 'QSj-
} 7Y?59 [
int i1=l; _U|rTil
int i2=mid+1; kfY. 9$(d
for(int cur=l;cur<=r;cur++){ xLdkeuL[%
if(i1==mid+1) (}RTHpD
data[cur]=temp[i2++]; lLur.f
else if(i2>r) /z m+
data[cur]=temp[i1++]; g-pEt#
else if(temp[i1] data[cur]=temp[i1++]; h e=A%s
else g'+2bQ
data[cur]=temp[i2++]; zYxA#TZL
} Ts\PZQ!q
} ! FVD_8
RD6>\9
} x.9[c m-!
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改进后的归并排序: ep6V2R
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package org.rut.util.algorithm.support; wG&Z7C b
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import org.rut.util.algorithm.SortUtil; i,zZJ=a$
a8YFH$Xh
/** CZ!gu Y=
* @author treeroot !5qV}5
* @since 2006-2-2 w7E#mdW
* @version 1.0 U#x`u|L&6
*/ ~OMo$qt`lP
public class ImprovedMergeSort implements SortUtil.Sort { |H(i)yu"5'
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private static final int THRESHOLD = 10; _b`/QSL
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/* a51}~V1
* (non-Javadoc) ~Qd|.T
* au E8 ^|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HBNX a
*/ |hS^eK_
public void sort(int[] data) { _1jbNQa
int[] temp=new int[data.length]; \'r;1W
mergeSort(data,temp,0,data.length-1); %+((F+[
} 3, 3n
B qo#cnlG
private void mergeSort(int[] data, int[] temp, int l, int r) { G%junS'zt
int i, j, k; as73/J6
int mid = (l + r) / 2; ec,Bu7'8
if (l == r) \=[38?QOY
return; _H@8qR
if ((mid - l) >= THRESHOLD) (QdLz5\
mergeSort(data, temp, l, mid); cSBS38>
else B1j^qoC.5
insertSort(data, l, mid - l + 1); cm8co
if ((r - mid) > THRESHOLD) g,G{%dGsk
mergeSort(data, temp, mid + 1, r); |2GrOM&S
else iA|n\a~ny,
insertSort(data, mid + 1, r - mid); hh$i1n
4}Y? :R
for (i = l; i <= mid; i++) { ?Ld:HE
temp = data; sDvy(5
} cJ>^@pd{
for (j = 1; j <= r - mid; j++) { sC ?e%B
temp[r - j + 1] = data[j + mid]; sY[!=`@
} /g1;`F(MS/
int a = temp[l]; ~<}?pDA}~
int b = temp[r]; o{' JO3
for (i = l, j = r, k = l; k <= r; k++) { i)/#u+Y1P
if (a < b) { (S?qxW?
data[k] = temp[i++]; aI;fNy/K
a = temp; t]{, 7.S
} else { |RBL5,t^
data[k] = temp[j--]; a# Uk:O!
b = temp[j]; [U$`nnp
} wH\ K'/
} e +jp,>(v
} RDeI l&
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/** -^*8D(j*
* @param data ]vuxeu[cu,
* @param l 8/}S/$
* @param i Y3ypca&P9
*/ J!"m{ 8-
private void insertSort(int[] data, int start, int len) { *CVI@:Q9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Snq0OxS[v
} MM~4D
} %C)|fDwN
} l xP!WP
} {M23a _t\
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堆排序： :4>LtfA
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package org.rut.util.algorithm.support; ?i\$U'2*z3
}5d|y*
import org.rut.util.algorithm.SortUtil; "/x/]Qx2
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/** m:g%5'qDZ
* @author treeroot m[w~h\FS
* @since 2006-2-2 9S?b &]
* @version 1.0 e63io0g>
*/ q#0yu"<
public class HeapSort implements SortUtil.Sort{ pW&8 =Ew
vX*kvEG
/* (non-Javadoc) C?rb}(m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ']sIU;h3
*/ ZV!*ZpTe~
public void sort(int[] data) { 9x14I2
MaxHeap h=new MaxHeap(); s{fL~}Yz
h.init(data); ai)?RF
for(int i=0;i h.remove(); lC^?Jk[N
System.arraycopy(h.queue,1,data,0,data.length); `J}FSUn\
} ` kZ"5}li
d 8z9_C-
private static class MaxHeap{ L @8[.
c-[IgX e
void init(int[] data){ WWA!_
this.queue=new int[data.length+1]; )IuwI#pm
for(int i=0;i queue[++size]=data; +H_ /
fixUp(size); .Zx7+`i
} !)OA7%3m
} <*opVy^
%%Wn:c>
private int size=0; 1k)`C<l
VjSA&R
private int[] queue; s3)T}52
>kV=h?]Y
public int get() { \U?{m)N
return queue[1]; A:?w1"7gT
} ^p~3H
*%dWNvN4X
public void remove() { }& 01=nY
SortUtil.swap(queue,1,size--); n(\VP!u5r
fixDown(1); Wp=:|J
} 0urM@/j+
file://fixdown P'k`H
private void fixDown(int k) { +B OuU#
int j; .:;#[Z{-
while ((j = k << 1) <= size) { Z15b'^)?9
if (j < size %26amp;%26amp; queue[j] j++; 4hV~ ir
if (queue[k]>queue[j]) file://不用交换 ulXe;2
break; KkZo|\V
SortUtil.swap(queue,j,k); N4,!b_1
k = j; )eWg2w]
} t2z@"e
} ":^cb =
private void fixUp(int k) { ^^(4xHN
while (k > 1) { Xx=.;FYk
int j = k >> 1; GnW_^$Fs
if (queue[j]>queue[k]) 3q1u9`4;
break; V7>{,
SortUtil.swap(queue,j,k); <V*M%YWs
k = j; YwF\
} {qBbzBG
} o(5 (]bJ
wEIAU
} 7A>glZ/x
!'%`g,,r
} UyOoyyd.
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SortUtil： YRP$tz+ _
gx6$:j;
package org.rut.util.algorithm; ZSW`/}Dp;
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import org.rut.util.algorithm.support.BubbleSort; C9cQ} j:
import org.rut.util.algorithm.support.HeapSort; 4";[Xr{pW
import org.rut.util.algorithm.support.ImprovedMergeSort; h+Tt+Q\
import org.rut.util.algorithm.support.ImprovedQuickSort; ht^xcc
import org.rut.util.algorithm.support.InsertSort; J+8T Ie
import org.rut.util.algorithm.support.MergeSort; qXQ7Jg9
import org.rut.util.algorithm.support.QuickSort; 2o-Ie/"d\
import org.rut.util.algorithm.support.SelectionSort; )V*V
import org.rut.util.algorithm.support.ShellSort; U*Pi%J
r1X\$&
/** }Z\PE0
* @author treeroot 0Bhf(5
* @since 2006-2-2 Qu@T}Ci
* @version 1.0 +wg|~Lef h
*/ L-(.v*
public class SortUtil { fmq9u(!R
public final static int INSERT = 1; ZfN%JJOz(
public final static int BUBBLE = 2; SgPvQ'\
public final static int SELECTION = 3; EXYr_$gRs
public final static int SHELL = 4; W%cJ#R[o
public final static int QUICK = 5; g"L$}#iTsl
public final static int IMPROVED_QUICK = 6; fRd^@@,[
public final static int MERGE = 7; v/WvT!6V`
public final static int IMPROVED_MERGE = 8; Gd%E337d
public final static int HEAP = 9; nc.X+dx:
*f$wmZ5A
public static void sort(int[] data) { WT>2eMK[
sort(data, IMPROVED_QUICK); RgT|^|ZA
} )]5}d$83
private static String[] name={ }W k!):=y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QWV12t$v
}; B>M@'
Q{+&3KXH
private static Sort[] impl=new Sort[]{ }Qm: g
new InsertSort(), Ox1#}7`0>
new BubbleSort(), R7d45Wl
new SelectionSort(), ,L}
new ShellSort(), B @8 ]!
new QuickSort(), (-U6woB6o
new ImprovedQuickSort(), mVuZ}`
new MergeSort(), /a!M6:,pX
new ImprovedMergeSort(), /^<Uy3F[p
new HeapSort() .d>TU bR;
}; ^p433
f?A1=lm~
public static String toString(int algorithm){ qx~-(|s`H
return name[algorithm-1]; nuip
} &%Lps_+fJ
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public static void sort(int[] data, int algorithm) { 8vLaSZ="[
impl[algorithm-1].sort(data); e1j3X\ \
} i7/I8y
Y[ciT)
public static interface Sort { $Dm2>:Dmt
public void sort(int[] data); JXIxk"m
} IE|$mUabm
>qBQfz:U>
public static void swap(int[] data, int i, int j) { A+&^As2
int temp = data; xQ=sZv^M
data = data[j]; jr<`@
data[j] = temp; MM*B.y~TxZ
} aIl}|n"
} *|T]('xwC