[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; WTN!2b
} f\w4F'^tj
int i1=l; -bQvJ`iF
int i2=mid+1; H}rP{`m
for(int cur=l;cur<=r;cur++){ 'Q,<_L"
if(i1==mid+1) 8Wp1L0$B
data[cur]=temp[i2++]; CMUphS-KE
else if(i2>r) `&JA7UD>
data[cur]=temp[i1++]; 1uzfV)
else if(temp[i1] data[cur]=temp[i1++]; sM[c\Z]
else t2<(by!
data[cur]=temp[i2++]; #R|4(HlL
} b~echOj
} +Q&@2 oY"
1h{_v!X
} ||NCVGJG
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改进后的归并排序: w=2X[V}
w`:KexD+
package org.rut.util.algorithm.support; .1M>KRSr,
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import org.rut.util.algorithm.SortUtil; Vdyx74xX
4}j}8y2)H
/** B)*%d7=x
* @author treeroot NYRNop( N#
* @since 2006-2-2 UkQocZdZ
* @version 1.0 FiL JF!
*/ qILr+zH
public class ImprovedMergeSort implements SortUtil.Sort { 5J3kQ;5Q?
'-{jn+,
private static final int THRESHOLD = 10; oaE3Aa
]P^ +~
/* 6Wp:W1E{`
* (non-Javadoc) jL>r*=K)%
* (>23[;.0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _bsfM;u.%
*/ H8U*oLlc
public void sort(int[] data) { x$sQ .aT
int[] temp=new int[data.length]; 6, ~aV
mergeSort(data,temp,0,data.length-1); gUQCKNw
} cMAfW3j: ;
K*[wr@)u
private void mergeSort(int[] data, int[] temp, int l, int r) { ['j,S<Bu~
int i, j, k; @,.H)\a4
int mid = (l + r) / 2; dno*Usx5d0
if (l == r) ,B><la87
return; 6 h):o
if ((mid - l) >= THRESHOLD) iqYc&}k,
mergeSort(data, temp, l, mid); 54&2SU$kx
else 6!N&,I
insertSort(data, l, mid - l + 1); A}# Mrb
if ((r - mid) > THRESHOLD) -B!pg7>'##
mergeSort(data, temp, mid + 1, r); rKxk?}
else ,"v%
insertSort(data, mid + 1, r - mid); |n/id(R+
1??RX}8[L+
for (i = l; i <= mid; i++) { !b=$FOC>
temp = data; ^&%?Q_]
} iV=#'yY
for (j = 1; j <= r - mid; j++) { c$;enAf@
temp[r - j + 1] = data[j + mid]; "G:>}cs%?
} AS;{{^mM(
int a = temp[l]; ~XRr }z_Lq
int b = temp[r]; suwj1qYJ4
for (i = l, j = r, k = l; k <= r; k++) { |@nXlZE
if (a < b) { z=sqO'~
data[k] = temp[i++]; To+{9"$,
a = temp; 8*ysuL#
} else { xPv&(XZR
data[k] = temp[j--]; h&{pMmS3,
b = temp[j]; W` V
} w,7 GC5j\
} V{r@D!}
} tuSgh!
`,O^=HBM
/** xM,3F jF
* @param data +TX]~k79Oq
* @param l =&'j;j
* @param i KN=Orx7Gy
*/ }e$);A|
private void insertSort(int[] data, int start, int len) { ~jaGf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .O(UK4Mb
} d8>D=Ve
} rv%Xvs B
} DzEixE-
} }m?L/Y'}
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堆排序： )mU)7@!
?/~1z*XUW
package org.rut.util.algorithm.support; _)Ms9RN
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import org.rut.util.algorithm.SortUtil; \BDNF<_
]_h"2|
/** h4CB1K
* @author treeroot aw`mB,5U
* @since 2006-2-2 2iu;7/
* @version 1.0 O-k(5Zb
*/ Q1rwTg\
public class HeapSort implements SortUtil.Sort{ .B@;ch,
0M"E6z)9
/* (non-Javadoc) IlVi1`]w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6S(3tvUr
*/ %K%z<R8
public void sort(int[] data) { c-,/qn/
MaxHeap h=new MaxHeap(); LQe<mZ<
h.init(data); ]=/f`
for(int i=0;i h.remove(); _Z%C{~,7)x
System.arraycopy(h.queue,1,data,0,data.length); 8LL);"$
} *\>7@r[%5
f%af.cR*
private static class MaxHeap{ :V [vE h
X qh+
void init(int[] data){ _LK(j;6K}
this.queue=new int[data.length+1]; C5m*pGImG
for(int i=0;i queue[++size]=data; G100L}d"N
fixUp(size); SWu=n1J.?H
} 84k;d;
} Y9C]-zEv
~7*HZ:.
private int size=0; nV<YwqK
61]6N;kJ;
private int[] queue; Wrlmo'31
3wK)vW
public int get() { i9\Pks#l%
return queue[1]; w/R^Vwq
} 2c}kiqi{
_K8-O>I "
public void remove() { 3 . @W.GG8
SortUtil.swap(queue,1,size--); A;kB"Tx
fixDown(1); mU*GcWbc+
} ? in&/ZrB
file://fixdown PiN3t]2
private void fixDown(int k) { #2}S83 k
int j; :ZUy(8%Wl
while ((j = k << 1) <= size) { k;%}%"EVZ
if (j < size %26amp;%26amp; queue[j] j++; q+N}AKawB
if (queue[k]>queue[j]) file://不用交换 &B) F_EI
break; Jyd%!v
SortUtil.swap(queue,j,k); \"5\hX~dS
k = j; Yz,*Q<t
} te1lUQ
} A2B&X}K|U
private void fixUp(int k) { 8!1o,=I$
while (k > 1) { % R'eV<
int j = k >> 1; %j=7e@
if (queue[j]>queue[k]) _onHe"%{
break; ALFw[1X
SortUtil.swap(queue,j,k); UZ y
k = j; NoMEe<
} S"lcePN
} f6DPah#
ioZ2J"s
} 1@/+ c
bo]k9FC
} 2WKA] l;
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SortUtil： R^D~ic N
!OiP<8 ,H
package org.rut.util.algorithm; FrB19
Rq;R{a
import org.rut.util.algorithm.support.BubbleSort; p.zU9rID
import org.rut.util.algorithm.support.HeapSort; &fW;;>
import org.rut.util.algorithm.support.ImprovedMergeSort; l9n8v\8,o
import org.rut.util.algorithm.support.ImprovedQuickSort; &4]%&mX)-
import org.rut.util.algorithm.support.InsertSort; fz:F*zT1
import org.rut.util.algorithm.support.MergeSort; P afmHXx
import org.rut.util.algorithm.support.QuickSort; 'Y[\[]3[8
import org.rut.util.algorithm.support.SelectionSort; -2f0CAh~
import org.rut.util.algorithm.support.ShellSort; m0 `wmM
%F03cI,
/** py)V7*CgH
* @author treeroot pxP7yJL`
* @since 2006-2-2 )]v vp{
* @version 1.0 i^ 1P6B
*/ X2s=~)`#c
public class SortUtil { KBXdr52"
public final static int INSERT = 1; !Qn:PSk
public final static int BUBBLE = 2; Uq"RyvkpP
public final static int SELECTION = 3; b+hZ<U/
public final static int SHELL = 4; :V`q;g
public final static int QUICK = 5; w^dB1Y7c(W
public final static int IMPROVED_QUICK = 6; o8bVz2E
public final static int MERGE = 7; wZ29/{,
public final static int IMPROVED_MERGE = 8; )\t#e`3
public final static int HEAP = 9; .Yo#vV
7n%QP
public static void sort(int[] data) { ~aBALD0D;
sort(data, IMPROVED_QUICK); S0\:1B
} R D)dw
private static String[] name={ GK:*|jV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &bTadd%0
}; yBeSvsm
SdN|-'qf
private static Sort[] impl=new Sort[]{ x_#yH3kJ
new InsertSort(), |rsu+0Mtz
new BubbleSort(), Pf]L`haGN
new SelectionSort(), {R&F_51)V
new ShellSort(), b>G!K)MS3
new QuickSort(), he 9qWL&^G
new ImprovedQuickSort(), {DAwkJvb]
new MergeSort(), Rg+V;C C~
new ImprovedMergeSort(), xqLLoSte
new HeapSort() GQT|T0>Ro
}; ,>e)8
4uD!-1LT@
public static String toString(int algorithm){ c}$?k@=
return name[algorithm-1]; z;1yZ4[G
} =U2`]50
RKRk,jRL
public static void sort(int[] data, int algorithm) { }[?X%=
impl[algorithm-1].sort(data); gryC#
} ) 3Eax_?Z
~G,n>
public static interface Sort { 3]/w3|y
public void sort(int[] data); t hTY('m
} V&[|%jm&
pvkru-i]
public static void swap(int[] data, int i, int j) { 4WU 6CN
int temp = data; Zn&X Uvdl
data = data[j]; cy%^P^M
data[j] = temp; SkVW8n*s
} ?;!l-Dy
} -k")#1