[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; Z |uII#lq
} N^A&DrMF
int i1=l; /#M|)V*wn
int i2=mid+1; $D8eCjUm
for(int cur=l;cur<=r;cur++){ \D] N*
if(i1==mid+1) _NAKVzo-
data[cur]=temp[i2++]; GMLq3_'
else if(i2>r) 6X5`npf
data[cur]=temp[i1++]; Hd6g0
else if(temp[i1] data[cur]=temp[i1++]; ["}0umt
else 2E^zQ>;01
data[cur]=temp[i2++]; 3k;*xjv6@
} m]JZ@
} k/W$)b:Of`
6;U]l.
} 4f<%<Z
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改进后的归并排序: +]/_gz
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package org.rut.util.algorithm.support; MzRURH,
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import org.rut.util.algorithm.SortUtil; CRvUD.D
$[iSZ;
/** #uJGXrGt=
* @author treeroot r*<)QP^B~
* @since 2006-2-2 ]?tsYXU j
* @version 1.0 <l(6$~(-u
*/ rxQn[
public class ImprovedMergeSort implements SortUtil.Sort { OwrzD~
jQOY\1SR
private static final int THRESHOLD = 10; `/JJ\`Pu
mmm025.
/* T<06y3sN
* (non-Javadoc) ,x}p1EZ
* w@7NoD=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wxpE5v+f|
*/ S`TP#uzKu]
public void sort(int[] data) { k.>*!l0
int[] temp=new int[data.length]; `6`NuZ*6g
mergeSort(data,temp,0,data.length-1); ~?8B~l^
} dhpEBJ
XX",&cp02V
private void mergeSort(int[] data, int[] temp, int l, int r) { Wq8Uq}~_g
int i, j, k; 7f_4qb8
int mid = (l + r) / 2; 8'?V5.6?|~
if (l == r) W'6~`t
return; :^FOh*H
if ((mid - l) >= THRESHOLD) 1SeDrzLA
mergeSort(data, temp, l, mid); (UPkb$Qc
else ?U:?o_w
insertSort(data, l, mid - l + 1); u^SXg dj
if ((r - mid) > THRESHOLD) TLzg*
mergeSort(data, temp, mid + 1, r); rIp84}
else ET1/oG<@
insertSort(data, mid + 1, r - mid); I&qT3/SVI
6*Jd8Bva\o
for (i = l; i <= mid; i++) { Mh>H5l.1i
temp = data; |&WeXVH E
} $+)2CXQe5
for (j = 1; j <= r - mid; j++) { ;|e{J$
temp[r - j + 1] = data[j + mid]; qYc]Y9fi
} 72@raA#y
int a = temp[l]; l~Je]Qt
int b = temp[r]; FqAW><
for (i = l, j = r, k = l; k <= r; k++) { &=5
if (a < b) { #\*ODMk$4|
data[k] = temp[i++]; w<-8cvNhiz
a = temp; BL6t>
} else { #~%tdmGuL
data[k] = temp[j--]; 4(Gs$QkSo|
b = temp[j]; " &'Jw
} o&)O&bNJ
} 8=OK8UaU
} 7F.t>$'
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/** _In[Z?P}
* @param data F@4XORO;
* @param l KB!.N[!v
* @param i $/5<f<%u&)
*/ u{xjFx-
private void insertSort(int[] data, int start, int len) { #z 3tSnmp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {@1.2AWg
} c)gG
} S3]Cz$
} s`M[/i3Nm
} 1C(6.7l
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堆排序： Rq~\Yf+Pm
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package org.rut.util.algorithm.support; T1m'+^?"
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import org.rut.util.algorithm.SortUtil; Z{RRhJ
mz;S*ONlV
/** ?#idmb}(
* @author treeroot 6rP[*0[
* @since 2006-2-2 #k5WTcE
* @version 1.0 rMAH YH9
*/ >HO{gaRM
public class HeapSort implements SortUtil.Sort{ Y ::\;s
| iEhe
/* (non-Javadoc) 3 G/#OJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DG}YQr.L
*/ 4$J:A~2H]
public void sort(int[] data) { =A&x d"
MaxHeap h=new MaxHeap(); /WXy!W30<
h.init(data); FU/yJy
for(int i=0;i h.remove(); ",&#9
System.arraycopy(h.queue,1,data,0,data.length); Va,M9)F
} 4&;.>{:;
B8-v!4b0`
private static class MaxHeap{ GCCmUR9d
w_|R.T\7
void init(int[] data){ 2P`QS@v0a=
this.queue=new int[data.length+1]; =\.Oc+p4
for(int i=0;i queue[++size]=data; %:oyHlz%
fixUp(size); D"_~Njf
} I9P<!#q>
} 6r"uDV #0
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private int size=0; {bnNY
bG=CIa&@
private int[] queue; s.+2[R1HF
N+)4]ir>
public int get() { ^~}|X%q3
return queue[1]; bUbM}
} DODo !
MVHj?
public void remove() { &RP!9{F<
SortUtil.swap(queue,1,size--); ]z`Y'wSxd
fixDown(1); xMJF1O?3
} vf(8*}'!Q
file://fixdown Dgh|,LqUB
private void fixDown(int k) { S@]7
int j; ~8~B VwZ_
while ((j = k << 1) <= size) { bHE'R!*
if (j < size %26amp;%26amp; queue[j] j++; z52T"uW
if (queue[k]>queue[j]) file://不用交换 Zy^mSI4i
break; bf2R15|t5`
SortUtil.swap(queue,j,k); F_;oZ
k = j; "8|y
} oZ95)'L,
} opTDW)
private void fixUp(int k) { OQ"%(w>Hb
while (k > 1) { Z0T{1YEJ
int j = k >> 1; b3}928!D-@
if (queue[j]>queue[k]) /=Bz[O
break; <y5V],-U
SortUtil.swap(queue,j,k); X.<_TBos|
k = j; b2c% 0C
} Ry*NRP;
} -}|GkTM
{Pm^G^EP
} ?l#9ydi?
rm2"pfs
} %98F>wl
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SortUtil： rZ<0ks
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package org.rut.util.algorithm; l!e8=QlJ
l=*^FK]L`
import org.rut.util.algorithm.support.BubbleSort; |sz`w^#
import org.rut.util.algorithm.support.HeapSort; )3v0ex@Jl
import org.rut.util.algorithm.support.ImprovedMergeSort; *0M#{HQ
import org.rut.util.algorithm.support.ImprovedQuickSort; 8[5%l7's
import org.rut.util.algorithm.support.InsertSort; *9e T#dH
import org.rut.util.algorithm.support.MergeSort; AfW63;kH
import org.rut.util.algorithm.support.QuickSort; 8=ubMqr[
import org.rut.util.algorithm.support.SelectionSort; !J!zi
import org.rut.util.algorithm.support.ShellSort; pgz3d{]ua
1;r^QAK&
/** VaZ+TE
* @author treeroot =MO2M~e!
* @since 2006-2-2 FV^CSaN[R
* @version 1.0 J411bIxD+q
*/ o+{}O_r
public class SortUtil { 3=~"<f l
public final static int INSERT = 1; -H~g+i*J
public final static int BUBBLE = 2; >R3~P~@30
public final static int SELECTION = 3; 7t`<`BY^
public final static int SHELL = 4; x-+[gNc 6
public final static int QUICK = 5; vFY/o,b \
public final static int IMPROVED_QUICK = 6; pW O-YZ#+
public final static int MERGE = 7; =Xzqp,
public final static int IMPROVED_MERGE = 8; f ^mxj/%L
public final static int HEAP = 9; YXXUYi~!f
Dr6"~5~9w
public static void sort(int[] data) { wqBGJ
sort(data, IMPROVED_QUICK); ie^:PcU
} [bkMl+:/HG
private static String[] name={ @eMDRbgq;[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M xj
}; AoyU1MR(
pcNVtp'V
private static Sort[] impl=new Sort[]{ kbBD+*
new InsertSort(), ^ cN-
new BubbleSort(), #G{}Rd|!
new SelectionSort(), A=|LMJMWR
new ShellSort(), l;U9dO}/[
new QuickSort(), JGt4B
new ImprovedQuickSort(), V`~$| K[
new MergeSort(), /tA$'tZ
new ImprovedMergeSort(), K,tmh1
new HeapSort() R?+Eo(0q,
}; eJ)Bs20Q
g.f!Uc{
public static String toString(int algorithm){ @;_r`AT7
return name[algorithm-1]; DU$]e1
} \*6%o0c
:Oo
public static void sort(int[] data, int algorithm) { "-XL Y_
impl[algorithm-1].sort(data); 0*VRFd4
} C.@R#a'
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public static interface Sort { N^q*lV#kob
public void sort(int[] data); oTo'? E#
} #0`2wuo {
6k"Wy3/
public static void swap(int[] data, int i, int j) { xXH%7%W'f
int temp = data; C]*9:lK
data = data[j]; lW'6rat
data[j] = temp; (Z.K3
} K]zBPfx
} FB@c +*1