[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; 6?5dGYAX<
} 6H2Bf*i
int i1=l; vG6*[c8
int i2=mid+1; lFf>z}eLy
for(int cur=l;cur<=r;cur++){ }U=}5`_]D
if(i1==mid+1) Ln6emXqw
data[cur]=temp[i2++]; " ]k}V2l
else if(i2>r) ';\norx;
data[cur]=temp[i1++]; <WWZb\"{
else if(temp[i1] data[cur]=temp[i1++]; %h0BA.r
else VFawASwQ
data[cur]=temp[i2++]; dY.X/f
} @VHstjos^V
} VWt=9D;
|g \_xl
} \kV|S=~@
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改进后的归并排序: \nyqW4nTm
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package org.rut.util.algorithm.support; }9U_4k
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import org.rut.util.algorithm.SortUtil; oH4zW5
/+B6oE>8
/** WF~x`w&\
* @author treeroot 5{+>3J
* @since 2006-2-2 l#]#_
* @version 1.0 xc-[gt6
*/ Qt\:A!'jw
public class ImprovedMergeSort implements SortUtil.Sort { UxB3/!<5g3
P//nYPyzg
private static final int THRESHOLD = 10; \2~\c#-k
\;_tXb}F
/* L;g2ZoqIr0
* (non-Javadoc) @g`|ob]9
* )(.g~Q:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {4SaSv^/
*/ z^*g2J,
public void sort(int[] data) { @N[<<k7g
int[] temp=new int[data.length]; *!%n`BR '
mergeSort(data,temp,0,data.length-1); sRBfLN2C
} :{S@KsPqE
)mAD<y+
private void mergeSort(int[] data, int[] temp, int l, int r) { JgHYuLB
int i, j, k; 6)=;cc{Vr
int mid = (l + r) / 2; 6NyUGGRq
if (l == r) F5H*z\/={
return; NMg(tmh
if ((mid - l) >= THRESHOLD) nfZe"|d
mergeSort(data, temp, l, mid); ^h=gaNL
else {=Ji2k0U'
insertSort(data, l, mid - l + 1); /EQ^-4yr
if ((r - mid) > THRESHOLD) !"/"Mqs3$
mergeSort(data, temp, mid + 1, r); Zw4%L?
else pHoxw|'Y
insertSort(data, mid + 1, r - mid); FeZWS>N
)#4(4 @R h
for (i = l; i <= mid; i++) { v5 p`=Z@%
temp = data; (p'/a.bn
} HC/a
for (j = 1; j <= r - mid; j++) { wZCboQ,
temp[r - j + 1] = data[j + mid]; Fsq)co
} Jb9@U/<\
int a = temp[l]; ~ [/jk !G
int b = temp[r]; WC_U'nTu4
for (i = l, j = r, k = l; k <= r; k++) { AK'3N1l`
if (a < b) { m=COF$<
data[k] = temp[i++]; 3qu?qD
a = temp; 0S+$l
} else { }9B},
data[k] = temp[j--]; l| \ -d
b = temp[j]; ettBque
} vd^Z^cpip
} =d~pr:.F
} ub1~+T'O
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/** n/BoK6g
* @param data F3q<j$y
* @param l fpZHE=}r
* @param i dpge:Qhr
*/ Zn*W2s^^{
private void insertSort(int[] data, int start, int len) { (}T},ygQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |V}tTx1
} ?qHQ#0 @y]
} =<#++;!I
} S}Z@g
} 6v}q @z
41.xi9V2
堆排序： X?u=R)uG
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package org.rut.util.algorithm.support; &F;bg
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import org.rut.util.algorithm.SortUtil; jC>mDnX
U"UsQYa_
/** @kT@IQkri
* @author treeroot i-WP#\s
* @since 2006-2-2 &>Y.$eW_
* @version 1.0 |yj0Rv
*/ GqP02P'2
public class HeapSort implements SortUtil.Sort{ fOsvOC
+g1+,?cU
/* (non-Javadoc) aAd1[?&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?mVSc/
*/ o?= &kx
public void sort(int[] data) { =kOo(
MaxHeap h=new MaxHeap(); Mxd7X<\$
h.init(data); zrE{CdG%y
for(int i=0;i h.remove(); h<CRW-
System.arraycopy(h.queue,1,data,0,data.length); ns/*WH&[x
} V=>]&95-f
?%Q=l;W.
private static class MaxHeap{ s nNd7v.U6
l8%BRG
void init(int[] data){ 0,#n_"
this.queue=new int[data.length+1]; a>Aq/=
for(int i=0;i queue[++size]=data; weGsjy(b]N
fixUp(size); ;3Z?MQe"NQ
} ^x(s!4d]
} %\'G2
l]
private int size=0; X*Q<REDB
u Vv%k5
private int[] queue; EuVA"~PA
*|6vCR
public int get() { cs:?Wq ^
return queue[1]; u?z,Vs"
} =yJV8%pa
va#].4_
public void remove() { Nd;pkssd
SortUtil.swap(queue,1,size--); ]_L;AD
fixDown(1); Q!AGalP z
} (v0Q.Q@<
file://fixdown ]-+l.gVFW
private void fixDown(int k) { HYJEz2RF
int j; /;y`6WG%2
while ((j = k << 1) <= size) { NOAz"m+o
if (j < size %26amp;%26amp; queue[j] j++; 04Uyr;y
if (queue[k]>queue[j]) file://不用交换 S,Qa\\~z
break; qsQTJlq)
SortUtil.swap(queue,j,k); ][8`}ki 1
k = j; pgv, Su
} {?cF2K#
} x'Nc}
private void fixUp(int k) { RO[X#c
while (k > 1) { {?mb.~(
int j = k >> 1; QPFv]^s(
if (queue[j]>queue[k]) uE%2kB*]
break; 7D~~<45ct
SortUtil.swap(queue,j,k); #rz!d/)Q
k = j; !Ap*PL
} Z#kB+.U
} G;pc,\MF
PVQn$-aq1
} EyV5FWb58
&-vHb
} }4,[oD
%r(qQM.Pl
SortUtil： SapVS*yx@
Cs vwc%
package org.rut.util.algorithm; X7?14W
-2C^M> HZ
import org.rut.util.algorithm.support.BubbleSort; cI@'Pr4:FJ
import org.rut.util.algorithm.support.HeapSort; f$?`50D"1
import org.rut.util.algorithm.support.ImprovedMergeSort; 9zLeyw\
import org.rut.util.algorithm.support.ImprovedQuickSort; pG v*{.
import org.rut.util.algorithm.support.InsertSort; |$GPJaNqa
import org.rut.util.algorithm.support.MergeSort; Hr}\-$
import org.rut.util.algorithm.support.QuickSort; {uqP+Cs
import org.rut.util.algorithm.support.SelectionSort; Pvm pWa
import org.rut.util.algorithm.support.ShellSort; dD 6jMl
P|;v>
/** *iSE)[W
* @author treeroot $>wN:uN(
* @since 2006-2-2 + :b"0pu-H
* @version 1.0 '+GYw$
*/ Nk$|nn9#'
public class SortUtil { W=n Hi\jLV
public final static int INSERT = 1; @cG+D
public final static int BUBBLE = 2; *oh,Va
public final static int SELECTION = 3; dL1{i,M
public final static int SHELL = 4; $/E{3aT@F2
public final static int QUICK = 5; g/i.b&
public final static int IMPROVED_QUICK = 6; ;hd%wmE
public final static int MERGE = 7; +.u HY`A
public final static int IMPROVED_MERGE = 8; \5HVX/
public final static int HEAP = 9; 8SupoS
T.WN9=N
public static void sort(int[] data) { \MAv's4b@
sort(data, IMPROVED_QUICK); {Q^ -
} 6>b#nFVJ
private static String[] name={ JFkx=![
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cNy*< Tv
}; W$gjcsv
(|tR>R.Wxg
private static Sort[] impl=new Sort[]{ 1_@vxi~aW_
new InsertSort(), *M$$%G(4
new BubbleSort(), E7<l^/<2S+
new SelectionSort(), 9SU/86|N
new ShellSort(), &~=d;llkT
new QuickSort(), LO%OH u}]
new ImprovedQuickSort(), _akpW
new MergeSort(), m9ky?A,
new ImprovedMergeSort(), PoRP]Q*n
new HeapSort() pA\"Xe&
}; @~i :8
+a+DiD>./
public static String toString(int algorithm){ v#5hK<9
return name[algorithm-1]; 8'Q&FW3"
} ji5Nq+S2
$A98h-*x
public static void sort(int[] data, int algorithm) { Z v 7}C
impl[algorithm-1].sort(data); ]-OF3+l4
} zpcO7AY~
@|d`n\%x
public static interface Sort { IL%P\Zs
public void sort(int[] data); l% {<+N
} d @b ]/
e,*@+E\4
public static void swap(int[] data, int i, int j) { aL8Z|*
int temp = data; K[q-[q#yc
data = data[j]; PD^Cj?wm
data[j] = temp; ztC,[
} 1E$^ul-v
} V'l9fj*E