[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; $Z,i|K;
} 1XqIPiXJ
int i1=l; gW'P`Oxw
int i2=mid+1; a#YuKh?
for(int cur=l;cur<=r;cur++){ +ylxezc
if(i1==mid+1) N[0 xqQ
data[cur]=temp[i2++]; )Y=w40Yzd
else if(i2>r) @>M8Pe
data[cur]=temp[i1++]; N-XVRuv
else if(temp[i1] data[cur]=temp[i1++]; zv$Gma_
else z\e>DdS
data[cur]=temp[i2++]; kuWK/6l4
} 8.*\+nH
} $7msL#E7
jK\V|5k
} <Gn8B^~$
M4zX*&w.T
改进后的归并排序: u(8_[/_B
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package org.rut.util.algorithm.support; 7k'=Fm6za
bc `UA
import org.rut.util.algorithm.SortUtil; b^uP^](J
`%FIgE^
/** ]jHgo](%
* @author treeroot fn1 ?Qp|
* @since 2006-2-2 ^^n+
* @version 1.0 I(z>)S'7r
*/ JN{<oxI
public class ImprovedMergeSort implements SortUtil.Sort { M3DxapG
B.]qrS|
private static final int THRESHOLD = 10; jf$JaY
Ul'~opf
/* ML=hKwCA
* (non-Javadoc) 0t5Q9#RY
* P]!LN\[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >{O[t2&
*/ EO4"Z@ji
public void sort(int[] data) { *\=2KIF'
int[] temp=new int[data.length]; aDm-X r
mergeSort(data,temp,0,data.length-1); *4(/t$)pEl
} r4;5b s6wm
Gl?P.BCW.&
private void mergeSort(int[] data, int[] temp, int l, int r) { qWRNHUd
int i, j, k; qR [}EX&3
int mid = (l + r) / 2; n.2E8m/
if (l == r) ^/`#9]<%
return; ](B&l{V
if ((mid - l) >= THRESHOLD) @D.R0uM
mergeSort(data, temp, l, mid); Nb^zkg
else h]J&A
insertSort(data, l, mid - l + 1); AIvL#12
if ((r - mid) > THRESHOLD) GNhtnB
mergeSort(data, temp, mid + 1, r); rK(x4]I l"
else pm'@2dT
insertSort(data, mid + 1, r - mid); ]C}u-B746
s=^r/Sz902
for (i = l; i <= mid; i++) { iF#}t(CrH
temp = data; 6e$sA (a=i
} XEf&Yd
for (j = 1; j <= r - mid; j++) { 68&6J's;
temp[r - j + 1] = data[j + mid]; .LXh]I*
} eZN3H"H
int a = temp[l]; br34Eh
int b = temp[r]; %=NM_5a}]
for (i = l, j = r, k = l; k <= r; k++) { 2fj0 I
if (a < b) { q G :jnl
data[k] = temp[i++]; E<zT
a = temp; ?z)y%`}
} else { _V_8p)%
data[k] = temp[j--]; y~]IVl"
b = temp[j]; an$]IN
} `mq4WXO\
} ADLa.{
} j,|1y5f
xY\*L:TwW
/** wZ]BY;
* @param data eB<V%,%N#
* @param l .q_uJ_qu-
* @param i V 9QvQA r
*/ !\&7oAs=I
private void insertSort(int[] data, int start, int len) { e\d5SKY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z!*8JaMT
} DK@w^ZW6JA
} %|D\j-~
} RKoP6LGw
} qSpa4W[
aiR|.opIb
堆排序： "x:)$@
7+D'W7Yx
package org.rut.util.algorithm.support; aCUV[CPw
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import org.rut.util.algorithm.SortUtil; ]df9'\
Lilk8|?#W
/** &-8-xw#.
* @author treeroot /8$1[[[
* @since 2006-2-2 R@7GCj
* @version 1.0 6wpND|cT
*/ Z0F>"Z_qn
public class HeapSort implements SortUtil.Sort{ YA;8uMqh;
Hz3 S^o7
/* (non-Javadoc) 5&rCNi*\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M|Dwk3#
*/ 2W"cTm
public void sort(int[] data) { O&?CoA?
MaxHeap h=new MaxHeap(); St3(1mApl
h.init(data); M[ ~2,M&H
for(int i=0;i h.remove(); 3|83Jnh
System.arraycopy(h.queue,1,data,0,data.length); H%NLL4&wu
} G7_"^r%c9;
%8}ksl07
private static class MaxHeap{ o. V0iS]
hyvV%z Z
void init(int[] data){ -YRL>]1
this.queue=new int[data.length+1]; m|ERf2-
for(int i=0;i queue[++size]=data; }d~FTre
fixUp(size); vq0M[Vy
} 3ciVjH>i
} $p6Xa;j$9
zy/tQGTr@
private int size=0; 8v)~J}[Bz
'9p5UC
private int[] queue; h4B#T'b
.f92^lu9
public int get() { li_pM!dWU_
return queue[1]; 2$i 0yPv
} AXU!-er$
WlQ&Yau
public void remove() { xwH|ryfs,Z
SortUtil.swap(queue,1,size--); <1g1hqK3
fixDown(1); b1,T!xL
} $L#Z?76v
file://fixdown U*R~w5W.[
private void fixDown(int k) { ux79"5qb
int j; w`#0 Y9O
while ((j = k << 1) <= size) { q=0{E0@9({
if (j < size %26amp;%26amp; queue[j] j++; f/[?5M[
if (queue[k]>queue[j]) file://不用交换 8apKp?~yW
break; Tk#&Ux{ZJ
SortUtil.swap(queue,j,k); ^a#&wW
k = j; K<7T}XzU$
} .McoW7|Y
} l6DIsR
private void fixUp(int k) { *6x^w%=A
while (k > 1) { b5 C}K
int j = k >> 1; !q6V@&
if (queue[j]>queue[k]) ~lalc ^
break; \PMKmJX0O
SortUtil.swap(queue,j,k); %:;[M|.
k = j; $?AUk
} rPGE-d3
} 2hA66ar{$
e}O-I
} |XdrO
J!fc)h
} er7/BE&
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SortUtil： K\E]X\:
TYS\:ZdXF
package org.rut.util.algorithm; H[!Q
GxBPEIim
import org.rut.util.algorithm.support.BubbleSort; 8qYGlew,
import org.rut.util.algorithm.support.HeapSort; "JLhOTPaHf
import org.rut.util.algorithm.support.ImprovedMergeSort; kR~4O$riG
import org.rut.util.algorithm.support.ImprovedQuickSort; Cv(N5mA2
import org.rut.util.algorithm.support.InsertSort; 2#A9D.- h
import org.rut.util.algorithm.support.MergeSort; @P5@&G
import org.rut.util.algorithm.support.QuickSort; {*Wwu f.
import org.rut.util.algorithm.support.SelectionSort; O+Lb***b"
import org.rut.util.algorithm.support.ShellSort; DoB3_=yJ+
u{nWjqrM*5
/** OO+#KyU
* @author treeroot nMdN$E
* @since 2006-2-2 nV xMo_
* @version 1.0 `iayh
*/ ~+iJpW
public class SortUtil { Csm!\I
public final static int INSERT = 1; ggsi`Z{j?
public final static int BUBBLE = 2; p6l@O3
public final static int SELECTION = 3; n*4X/K
public final static int SHELL = 4; =RE_Urt:
public final static int QUICK = 5; }vA nP]!A5
public final static int IMPROVED_QUICK = 6; MkGq%AE`Y
public final static int MERGE = 7; k:@Ls
public final static int IMPROVED_MERGE = 8; BW-P%:B1!R
public final static int HEAP = 9; A;`U{7IST
>N1]h'q>
public static void sort(int[] data) { GfPz^F=ie.
sort(data, IMPROVED_QUICK); =(5GU<}
} eo52X&I
private static String[] name={ +4nR&1z$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $ 14DTjj
}; >MY.Fr#.m
YaT+BRh?
private static Sort[] impl=new Sort[]{ |ylTy B
new InsertSort(), mqT0^TNPcl
new BubbleSort(), ^&/&I9z
new SelectionSort(), NWN)b&}
new ShellSort(), _W@Fk)E6N
new QuickSort(), SWd[iD
new ImprovedQuickSort(), QLU;.&
new MergeSort(), OmbKx&>YGz
new ImprovedMergeSort(), v+bjC
new HeapSort() NRF%Qd8I/2
}; +p6\R;_E
Ic!83-
public static String toString(int algorithm){ W2Z]?l;vQQ
return name[algorithm-1]; JP*mQzZL
} arL&^]JnZ,
9<CUsq@i:
public static void sort(int[] data, int algorithm) { eaP$/U D?
impl[algorithm-1].sort(data); !Y(qpC:$
} `b'J*4|oGo
;*H~Yb0
public static interface Sort { !sQ8,l0h
public void sort(int[] data); >&Q. .`q
} F<Z=%M3e
{;M/J
public static void swap(int[] data, int i, int j) { K#< Wt5
int temp = data; :"IH*7xp
data = data[j]; v 8a
data[j] = temp; wh+ibH}@!
} XQ;dew+
} G_4P)G3H