[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; F_;oZ
} "8|y
int i1=l; oZ95)'L,
int i2=mid+1; opTDW)
for(int cur=l;cur<=r;cur++){ OQ"%(w>Hb
if(i1==mid+1) Z0T{1YEJ
data[cur]=temp[i2++]; b3}928!D-@
else if(i2>r) jeF1{%
data[cur]=temp[i1++]; ?Z%Ja_}8ma
else if(temp[i1] data[cur]=temp[i1++]; mMmzi4HL
else iJ_`ZM.w
data[cur]=temp[i2++]; cAJKFuX"
} L;30&a
} |qbCmsY5/
i$[wgvJIV
} W Da;wt
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改进后的归并排序: ZxkX\gl91
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package org.rut.util.algorithm.support; YAnt}]u!"
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import org.rut.util.algorithm.SortUtil; ;:1d<Q|
avxI\twAU
/** "Q9S<O8)
* @author treeroot NhQIpzL)
* @since 2006-2-2 b $x<7l5C
* @version 1.0 Zzr+p.
*/ G3&ES3L
public class ImprovedMergeSort implements SortUtil.Sort { <b"ynoM.A
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private static final int THRESHOLD = 10; =Run
=MO2M~e!
/* LB%_FT5
* (non-Javadoc) awuUaE
* _H@s^g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u.iFlU
*/ ]YkF^Pf!v
public void sort(int[] data) { hABC rd Em
int[] temp=new int[data.length]; [^ck;4q
mergeSort(data,temp,0,data.length-1); d}tn/Eu?B
} e3YZ-w^W~h
\@nmM&7C!4
private void mergeSort(int[] data, int[] temp, int l, int r) { J]ivIQ
int i, j, k; M xj
int mid = (l + r) / 2; K1uN(T.Ju
if (l == r) #C|:]moe
return; 5)V]qV$
if ((mid - l) >= THRESHOLD) *2crhI*@>
mergeSort(data, temp, l, mid); D2|-\vJ>
else u,[Yaw"L
insertSort(data, l, mid - l + 1); |s|>46E
if ((r - mid) > THRESHOLD) ;+K:^*oJ
mergeSort(data, temp, mid + 1, r); td4*+)'FY
else lJoMJS;S]}
insertSort(data, mid + 1, r - mid); 0:Js{$ZL4
rgILOtk[
for (i = l; i <= mid; i++) { Cca( oV
temp = data; $=iz&{9
} W-=~Afy
for (j = 1; j <= r - mid; j++) { CU6rw+Vax
temp[r - j + 1] = data[j + mid]; C]*9:lK
} 8<3J!X+
int a = temp[l]; ]tH/87qJ
int b = temp[r]; hU5[k/ q
for (i = l, j = r, k = l; k <= r; k++) { J/w?Fa<
if (a < b) { $;7?w-.
data[k] = temp[i++]; \A:m<::
a = temp; wQb")3dw
} else { >!E:$;i@
data[k] = temp[j--]; &bh?jW
b = temp[j]; JO5~Vj_"
} jnt0,y A
} )!3XM
} QpS0iUG
s\#kqw\x
/** xZtA) Bp
* @param data 82Nh;5Tr
* @param l U/yYQZ\)
* @param i Y[$[0
*/ ~6!=_"
private void insertSort(int[] data, int start, int len) { C5i]n? )S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~zRUJ2hD!
} Gw!jYnU
} P^v`5v
} =Z2U
} E8jdQS|i
&AGV0{NMh]
堆排序： vkE6e6,Qc
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package org.rut.util.algorithm.support; ^O#,%>1J
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import org.rut.util.algorithm.SortUtil; g-oHu8
#PoUCRRC
/** -{pcb7.xuv
* @author treeroot :Ff1Js(Z
* @since 2006-2-2 rv;w`f
* @version 1.0 0Z2![n
*/ Gi]Pwo${
public class HeapSort implements SortUtil.Sort{ dQ`ch~HVUW
?.|qRzWL
/* (non-Javadoc) iK(n'X5i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |w6:mtaS
*/ +H/^RvUjF
public void sort(int[] data) { )eY3[>`
MaxHeap h=new MaxHeap(); =B*,S#r
h.init(data); ;*wZgl
for(int i=0;i h.remove(); +?*,J=/
System.arraycopy(h.queue,1,data,0,data.length); pb$U~TvzhM
} -nN}8&l
oO$a4|&,
private static class MaxHeap{ 6T"[M
a[xEN7L~4D
void init(int[] data){ uV52ko,
this.queue=new int[data.length+1]; >LFhu6T
for(int i=0;i queue[++size]=data; rh${pHl
fixUp(size); $eX; 2
} /=lrdp!a
} e {N8|l
,;O+2TX
private int size=0; 4punJg~1
wCkhE,#-_
private int[] queue; JDD(e_dw
dW,$yH_
public int get() { (3%NudkwT
return queue[1]; \.9-:\'(
} %z`bu2
<{3VK
public void remove() { fE|([` !
SortUtil.swap(queue,1,size--); KFLIO>hE
fixDown(1); IM}#k$vM:
} 1}QU\N(t
file://fixdown B<H5WI
private void fixDown(int k) { IpB0~`7YI
int j; ]EE}ax%#aq
while ((j = k << 1) <= size) { +[V?3Gdb
if (j < size %26amp;%26amp; queue[j] j++; p(v+j_ak
if (queue[k]>queue[j]) file://不用交换 Pp@P]
break; w~;1R\?|
SortUtil.swap(queue,j,k); %=]~5a9
k = j; Cc]t*;nU_
} G3OqRH
} 7 H.2]X
private void fixUp(int k) { 0{@E=}}h
while (k > 1) { Yr,e7da
int j = k >> 1; g&\A1H
if (queue[j]>queue[k]) zo7Hm]W`
break; rts@1JY[
SortUtil.swap(queue,j,k); ORA+>
k = j; 2J|Wbey
} _Sosw|A
} P,j)m\|
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} @2L+"=u#
2Af1-z^^K
} -$QzbRF5R
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SortUtil： R}#?A%,*
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package org.rut.util.algorithm; -nV]%vJ$R}
:&/'rMi<T
import org.rut.util.algorithm.support.BubbleSort; ,~hvFTJI
import org.rut.util.algorithm.support.HeapSort; &+xNR2";
import org.rut.util.algorithm.support.ImprovedMergeSort; 2Rc#{A
import org.rut.util.algorithm.support.ImprovedQuickSort; ("}TW-r~
import org.rut.util.algorithm.support.InsertSort; }{n[_:[7
import org.rut.util.algorithm.support.MergeSort; <JuP+\JAm
import org.rut.util.algorithm.support.QuickSort; ,l_"%xYx
import org.rut.util.algorithm.support.SelectionSort; nkG1&wiX
import org.rut.util.algorithm.support.ShellSort; @v2_gjRe
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/** lOCMKaCD
* @author treeroot 'hf#Q9W5
* @since 2006-2-2 <KoiZ{V
* @version 1.0 MQG(n+c
*/ H]H*Ouu["e
public class SortUtil { _<+!
public final static int INSERT = 1; G yvEc3|@
public final static int BUBBLE = 2; 2!QJa=
public final static int SELECTION = 3; XPBKQm_}
public final static int SHELL = 4; ?R(fxx
public final static int QUICK = 5; yS0!#AG
public final static int IMPROVED_QUICK = 6; X"z^4?Aj+
public final static int MERGE = 7; K pDKIi
public final static int IMPROVED_MERGE = 8; MD1n+FgTu
public final static int HEAP = 9; QaH32(iH
5*/~) wN\U
public static void sort(int[] data) { >OgA3)X
sort(data, IMPROVED_QUICK); F *=>=
} k-Hy>5;
private static String[] name={ Eh^c4x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .D(H@3qA@
}; DJdW$S7
Tv_KdOv8
private static Sort[] impl=new Sort[]{ 3,8<5)ds*
new InsertSort(), ]]Sz|6P
new BubbleSort(), j_H9l,V
new SelectionSort(), )>QpR8 G-
new ShellSort(), ^RAst1q7
new QuickSort(), <'>c`80@\*
new ImprovedQuickSort(), _/;vsQB
new MergeSort(), =2F;'T\6
new ImprovedMergeSort(), jdiH9]&U
new HeapSort() W4%I%&j
}; 5/F1|N4
\}P3mS"e3
public static String toString(int algorithm){ z\Hg@J&#
return name[algorithm-1]; 3yX^93
} <wfPbzs-V
l+HmG< P
public static void sort(int[] data, int algorithm) { +DmfqKKbd
impl[algorithm-1].sort(data); (u-K^xC
} w[YiH $
iH<:wLY&J
public static interface Sort { h6Ovl
public void sort(int[] data); o,>9|EMQZ
} s1.EE|h,5
>x9@if
public static void swap(int[] data, int i, int j) { lD)ZMaaS3
int temp = data; Hb55RilC
data = data[j]; 9AF%Y:y
data[j] = temp; S~()A*5
} wXZ"}uT<}
} io%WV%1_