[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; c{K[bppJ*
} $<s 3;>t
int i1=l; +d,Z_ 6F
int i2=mid+1; 0N>R!
for(int cur=l;cur<=r;cur++){ l)( 3]
if(i1==mid+1) A<s9c=d6
data[cur]=temp[i2++]; qCgoB 0
else if(i2>r) SpX6PwM
data[cur]=temp[i1++]; 0:4w@"Q
else if(temp[i1] data[cur]=temp[i1++]; qEV>$>}
else VTvNn
data[cur]=temp[i2++]; 6.gk6
} dgM@|&9*m
} K-drN)o
+OC~y:
} Q!G^CG
6'1m3<G_
改进后的归并排序: XhG3Of-6
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package org.rut.util.algorithm.support; l|&DI]gw
0P_3%
import org.rut.util.algorithm.SortUtil; ^5BQ=
\J,pV
/** H^C$2f
* @author treeroot u~q6?*5
* @since 2006-2-2 jz72~+)T
* @version 1.0 ^26}j uQ
*/ t bEJyA
public class ImprovedMergeSort implements SortUtil.Sort { H|*Ual
rc+}KO
private static final int THRESHOLD = 10; -yP_S~\n
%T'<vw0
/* 6E@qZvQ
* (non-Javadoc) &a bR}J[
* Ea\Khf]2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p;<brwN
*/ YPNG9^Y
public void sort(int[] data) { IG=#2 /$
int[] temp=new int[data.length]; :J6lJ8w ?
mergeSort(data,temp,0,data.length-1); $c<NEt_\
} }MXC0Z~si
p? L*vcU
private void mergeSort(int[] data, int[] temp, int l, int r) { k]9v${Ke
int i, j, k; 'WQ?%da
int mid = (l + r) / 2; X{G&r$
if (l == r) #1oyRD-
return; 5'zD}[2
if ((mid - l) >= THRESHOLD) jM!Q 04(
mergeSort(data, temp, l, mid); 3r-oZ8/n
else $;%k:&\f
insertSort(data, l, mid - l + 1); Th>ff)~e
if ((r - mid) > THRESHOLD) G"|`&r@
mergeSort(data, temp, mid + 1, r); *$yU|,
else 's_[#a;Vp
insertSort(data, mid + 1, r - mid); @UCr`>
;fGh]i
for (i = l; i <= mid; i++) { XlDN)b5v{
temp = data; `4kVe= {
} GP{$w_'!J0
for (j = 1; j <= r - mid; j++) { oK#UEn
temp[r - j + 1] = data[j + mid]; f*46,`x
} %UokR"
int a = temp[l]; 1E]TH/JK
int b = temp[r]; H4"'&A7$
for (i = l, j = r, k = l; k <= r; k++) { s2*~n_B
if (a < b) { FH7h?!|t
data[k] = temp[i++]; KO3X)D<3
a = temp; urK~]68
} else { AMf{E
data[k] = temp[j--]; mfCp@1;26
b = temp[j]; G3_HX<|f*
} iininITOS{
} Hx#1TqC/
} *9O@DF&*6
<b#1L
/** @Z2^smf
* @param data U~1)a(Yu;
* @param l ) o`ep{<t
* @param i r"xs?P&/$
*/ f6k=ew
private void insertSort(int[] data, int start, int len) { hYB3tT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :^H2D=z@
} vMYL( ]e
} v1}9i3Or#
} ~6Pv5DKq
} 8$`$24Wx
L-eO_tTh0
堆排序： <@H`5[R
c.4WwzK
package org.rut.util.algorithm.support; IF'Tj`yD
WiiAIv&
import org.rut.util.algorithm.SortUtil; IC6r?
+*L<"@
/** 7 F> a&r
* @author treeroot K;j0cxl
* @since 2006-2-2 45A|KaVpg
* @version 1.0 eY\w?pT2
*/ $q*hE&x Qd
public class HeapSort implements SortUtil.Sort{ >yf}9Zs
~`X$bF
/* (non-Javadoc) %fMFcL#h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R1vuf*A5,
*/ *%CDQx0}
public void sort(int[] data) { s a{x.2/o}
MaxHeap h=new MaxHeap(); <N{Y*,^z
h.init(data); GUn$IPOM
for(int i=0;i h.remove(); B]u!BBjC
System.arraycopy(h.queue,1,data,0,data.length); ,{2= nb[
} w8}jmpnI
)m_q2xV
private static class MaxHeap{ |'qvq/#^
S\L^ZH?[2
void init(int[] data){ H/}W_ h^^
this.queue=new int[data.length+1]; bJoP@s
for(int i=0;i queue[++size]=data; QWwdtk
fixUp(size); )|wC 1J!L
} =A{s,UP
} i F \H
`z$=J"%? y
private int size=0; i5cK5MaD
Y^tUcBm\
private int[] queue; ;a 6Z=LB
[*U.bRs
public int get() { =z zmz7op
return queue[1]; `Z^\<{z
} [JYy
@{{6Nd5
public void remove() { >S>B tRl
SortUtil.swap(queue,1,size--); "7J38Ej\
fixDown(1); ZRj/lQ2D
} ^cCNQS}r
file://fixdown S$n?
private void fixDown(int k) { 0+T:};]
int j; mJZB@m u?
while ((j = k << 1) <= size) { -QK-w>
if (j < size %26amp;%26amp; queue[j] j++; #'dNSez5
if (queue[k]>queue[j]) file://不用交换 ]Z?jo#F
break; .z[#j]k
SortUtil.swap(queue,j,k); zl<D"eP
k = j; <:4b4Nl
} SZvp%hS0
} ipyc(u6Z5
private void fixUp(int k) { -ImVXy]?
while (k > 1) { YI>9C 76L
int j = k >> 1; e$7KMH=
if (queue[j]>queue[k]) upnX7as
break; 9[R+m3V/`
SortUtil.swap(queue,j,k); +GncQs y
k = j; dU-nE5
} zX]l$Q+
} u#UtPF7q
.uSVZqJ7
} L7[f-cK2:
fp}5QUm-
} N}nE?|N=5
o)n=n!A
SortUtil： 0#CmB4!<O
WO6R04+WV
package org.rut.util.algorithm; qM<CBcON
6)c-s|#
import org.rut.util.algorithm.support.BubbleSort; re4A5Ev$
import org.rut.util.algorithm.support.HeapSort; $18?Q+?3
import org.rut.util.algorithm.support.ImprovedMergeSort; "}vxHN#
import org.rut.util.algorithm.support.ImprovedQuickSort; 4~1lP&
import org.rut.util.algorithm.support.InsertSort; | {Q}:_/q
import org.rut.util.algorithm.support.MergeSort; 3YG%YhevO
import org.rut.util.algorithm.support.QuickSort; <G'M/IR a
import org.rut.util.algorithm.support.SelectionSort; md `=2l
import org.rut.util.algorithm.support.ShellSort; zkquXzlgB
\-SC-c
/** %C_c%3d
* @author treeroot A76HM@Q
* @since 2006-2-2 %aV~RB#
* @version 1.0 ^1yD&i'q
*/ !%[fi[p
public class SortUtil { hj}PL
public final static int INSERT = 1; j2%fAs<
public final static int BUBBLE = 2; @}2EEo#
public final static int SELECTION = 3; 51tZ:-1!
public final static int SHELL = 4; gVrfZ&XF84
public final static int QUICK = 5; !hjF"Pa
public final static int IMPROVED_QUICK = 6; tSe[*V4{'
public final static int MERGE = 7; XRHngW_A
public final static int IMPROVED_MERGE = 8; uPxJwWXO
public final static int HEAP = 9; G[6i\Et
7Ck3L6J#
public static void sort(int[] data) { ZQ>Q=eCs 1
sort(data, IMPROVED_QUICK); 3 .K #,
} >.I9S{7
private static String[] name={ uAV7T/'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o=6 <?v7
}; e]5NA?2j
IJVzF1vC
private static Sort[] impl=new Sort[]{ [] el4.J,
new InsertSort(), lF t^dl^
new BubbleSort(), upZtVdd
new SelectionSort(), FmhAUe
new ShellSort(), V(8,94vm
new QuickSort(), 2x<!>B
new ImprovedQuickSort(), Fy0sn|
new MergeSort(), :5BCW68le
new ImprovedMergeSort(), =k>fW7e
new HeapSort() [jksOC)@4
}; 9s*QHCB0
Q7-iy
public static String toString(int algorithm){ c3 )jsf
return name[algorithm-1]; iXq*EZb"R
} F`GXho[
*tv\5KW G
public static void sort(int[] data, int algorithm) { G4rzx%W?
impl[algorithm-1].sort(data); +prUau*
} ns*:mGh
MkhD*\D /
public static interface Sort { )+DDIq
public void sort(int[] data); Y`#6MhFT7
} pmOUl 8y4
9aNOfs8(
public static void swap(int[] data, int i, int j) { /]U;7)
int temp = data; "vg.{
data = data[j]; jgS3#
data[j] = temp; ANJL8t-m
} ^tjw }sE
} SUv'cld