[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; vn3<LQ]
} x*}j$n(Oa
int i1=l; 1g9Qvz3
int i2=mid+1; Xtbuy/8"1
for(int cur=l;cur<=r;cur++){ 1i#uKKwE
if(i1==mid+1) hXM8`iFW5
data[cur]=temp[i2++]; cyA|6Ltg%
else if(i2>r) EHkb{Q8
data[cur]=temp[i1++]; 4>>{}c!nf
else if(temp[i1] data[cur]=temp[i1++]; &#v^y3r
else VJBVk8P
data[cur]=temp[i2++]; ]B=B@UO@.
} 67%eAS
} lxj_(Uo
1qbd6D|t
} ,)'!E^n
LgRx\*[C*
改进后的归并排序: cy7GiB2'
[J\5DctX;c
package org.rut.util.algorithm.support; %75|+((fC
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import org.rut.util.algorithm.SortUtil; dKDtj:
7oA$aJQ
/** ~6.AE/ow
* @author treeroot ~!meO;|W
* @since 2006-2-2 6:>4}WOP
* @version 1.0 B<DvH"+$
*/ >`n0{:.1za
public class ImprovedMergeSort implements SortUtil.Sort { O^G/(
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private static final int THRESHOLD = 10; [Av87!kJ!X
n9gj{]%
/* ,& =(DJ
* (non-Javadoc) dr^pzM!N
* #tN)OZA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d~C YZ
*/ ]kbmbO?M
public void sort(int[] data) { ~/Aw[>_;
int[] temp=new int[data.length]; rOyK==8/Fg
mergeSort(data,temp,0,data.length-1); |@]J*Kh
} gC;y>YGP
wblEx/FqE^
private void mergeSort(int[] data, int[] temp, int l, int r) { I8gGP'
int i, j, k; \v9IbU*js
int mid = (l + r) / 2; P.3j |)NW
if (l == r) WG NuB9R
return; /tc*jXB
if ((mid - l) >= THRESHOLD) TU$/3fp*
mergeSort(data, temp, l, mid); Y4){{bEp
else 2al%J%
insertSort(data, l, mid - l + 1); 24Z7;'
if ((r - mid) > THRESHOLD) 3qiE#+dC
mergeSort(data, temp, mid + 1, r); 'I($IM
else A`Z!=og=
insertSort(data, mid + 1, r - mid); i]Lt8DiRq
zAC
for (i = l; i <= mid; i++) { l^:m!SA_
temp = data; UAnq|NJO
} bWt>tEnf
for (j = 1; j <= r - mid; j++) { " _jIqj6C
temp[r - j + 1] = data[j + mid]; {r`l
} Q mOG2
int a = temp[l]; lu`\6
int b = temp[r]; Um)0jT
for (i = l, j = r, k = l; k <= r; k++) { -6;0 x
if (a < b) { C#emmg!a\
data[k] = temp[i++]; +G"=1sxJ
a = temp; Z%D*2wm4
} else { ElZ'/l*\
data[k] = temp[j--]; S+R<wv,6
b = temp[j]; "V&2g?
} lzBy;i
} }5RfY| ;
} Ra'0 ^4t
*SzP7]1m
/** @%IZKYfc~
* @param data VFT G3,kI
* @param l [Oxmg?W
* @param i mAhtC*
*/ <t,uj.9_
private void insertSort(int[] data, int start, int len) { `FHHh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a^<
} 7B_;YT
} X, <&#l
} KM g`O3_16
} i5?)E7-
9qIUBHe
堆排序： )UI$s"
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package org.rut.util.algorithm.support; ZD6rD(l9
N6c']!aM@
import org.rut.util.algorithm.SortUtil; (sW:^0p
@/lLLGrZ"
/** n&iWYECz
* @author treeroot fGcAkEstT!
* @since 2006-2-2 jC*(ZF1B
* @version 1.0 j?jEWreq]~
*/ 'X_iiR8n@p
public class HeapSort implements SortUtil.Sort{ fPiq
/"- k ;jz
/* (non-Javadoc) e!l!T@ pf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GIWgfE?
*/ Tg&{P{$
public void sort(int[] data) { /_rQ>PgSZW
MaxHeap h=new MaxHeap(); {0lY\#qcE
h.init(data); K8pfk*NZ_@
for(int i=0;i h.remove(); HPCzh
System.arraycopy(h.queue,1,data,0,data.length); }zj w\
} #-'=)l}i1A
[zm&}$nnN
private static class MaxHeap{ f?dNTfQ3mi
h.%VWsAO7
void init(int[] data){ D=mU!rjr1
this.queue=new int[data.length+1]; Z9i,#/
for(int i=0;i queue[++size]=data; \u2K?wC
fixUp(size); :t(gD8;
} K-)*S\<}
} @@*->
:u'X ~ID[
private int size=0; :)c >5
76c4~IG#
private int[] queue; r4gkSwy
,YSQog
public int get() { Fw+JhIVP
return queue[1]; rzDqfecOmW
} -]Z!_[MlDF
BgA\l+
public void remove() { :GIY"l'
SortUtil.swap(queue,1,size--); uz ` H
fixDown(1); c?}C{
} l'W?X '
file://fixdown p[0Ws460
private void fixDown(int k) { CHdw>/5
int j; +;C|5y
while ((j = k << 1) <= size) { iEr|?,
if (j < size %26amp;%26amp; queue[j] j++; %pc0a^iB
if (queue[k]>queue[j]) file://不用交换 P;VR[d4e/
break; X-3L4@T:?
SortUtil.swap(queue,j,k); 1|;WaO1Q
k = j; $B~a*zZ7
} Aw4Qm2Kf
} #Q^mdv?
private void fixUp(int k) { |O+R%'z'<
while (k > 1) { .W,<]L '
int j = k >> 1; KofjveOiC
if (queue[j]>queue[k]) 9=rYzA?)+
break; UldKlQ8
SortUtil.swap(queue,j,k); Xvi{A]V
k = j; 3 V8SKBS
} %a5Sc|&-
} FDbx"%A
&VR<'^>
} 4J!1$
pJ+>qy5
} k/H<UW?Z]
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SortUtil： np=m~k
[mw#a9
package org.rut.util.algorithm; 4yQ4lU,r
{ zlq6z
import org.rut.util.algorithm.support.BubbleSort; +ywWQ|V
import org.rut.util.algorithm.support.HeapSort; g|)e3q{M
import org.rut.util.algorithm.support.ImprovedMergeSort; TCmWn$LeE
import org.rut.util.algorithm.support.ImprovedQuickSort; " 8;D^
import org.rut.util.algorithm.support.InsertSort; $T;3*D90
import org.rut.util.algorithm.support.MergeSort; gJs~kQU
import org.rut.util.algorithm.support.QuickSort; eFsku8$<
import org.rut.util.algorithm.support.SelectionSort; IdzF<>;W
import org.rut.util.algorithm.support.ShellSort; um&N|5lHb
uBl&|yvxB
/** oS_'@u.5
* @author treeroot 168U-<
* @since 2006-2-2 8y|(]5 'r
* @version 1.0 rQKBT]?y
*/ y,Dfqt
public class SortUtil { C$ZY=UXz!T
public final static int INSERT = 1; pC5-,Z;8
public final static int BUBBLE = 2; 5wGyM10
public final static int SELECTION = 3; ^,U&v;
public final static int SHELL = 4; }pTw$B
public final static int QUICK = 5; v^,A~oe`t
public final static int IMPROVED_QUICK = 6; eRVu/TY
public final static int MERGE = 7; vaTXu*
public final static int IMPROVED_MERGE = 8; `kekc.*-[@
public final static int HEAP = 9; (&njZdcb*
b#82G`6r
public static void sort(int[] data) { ?W.Y x7c
sort(data, IMPROVED_QUICK); WY*}|R2R
} BOh&Db*
private static String[] name={ QL|Vke:N4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K =7(=Y{
}; r9*{)"
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private static Sort[] impl=new Sort[]{ <<UlFE9"
new InsertSort(), foL`{fA
new BubbleSort(), 3FX`dZ
new SelectionSort(), NiyAAw
new ShellSort(), =#y&xWxL
new QuickSort(), aQRZyE}
new ImprovedQuickSort(), Q{$2D&
new MergeSort(), gO$!_!@LM
new ImprovedMergeSort(), OW #pBeX99
new HeapSort() F$+_Z~yt3;
}; F6q}(+9i
#m8Oy|Y9`
public static String toString(int algorithm){ r)7A# 3wId
return name[algorithm-1]; i uN8gHx
} 8eLNKgc
]?<uf40Mm
public static void sort(int[] data, int algorithm) { >6rPDzW`Dx
impl[algorithm-1].sort(data); ;{Ovqo|
} :!r_dmJ
TF{ xFb)
public static interface Sort { xNm<` Y?
public void sort(int[] data); ;zh|*F>
} A Ys<IMQ
.WtaU
public static void swap(int[] data, int i, int j) { v$,9l+p/
int temp = data; koAc-o
data = data[j]; l'o'q7&=z
data[j] = temp; )IhI~,0Nmj
} t`Hwq
} T>1E