[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; M:dH>
} !f]kTs]j~
int i1=l; BS ]:w(}[
int i2=mid+1; T;]Ob3(BpW
for(int cur=l;cur<=r;cur++){ `"o{MaFA
if(i1==mid+1) virt[5w
data[cur]=temp[i2++]; (\'$$
else if(i2>r) zp5ZZcj_
data[cur]=temp[i1++]; ZL:SJ,C
else if(temp[i1] data[cur]=temp[i1++]; e]5NA?2j
else ^$X|Lq
data[cur]=temp[i2++]; {u+=K-Bj
} [.}Uzx
} j#xGB]
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} 10)RLh|+
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改进后的归并排序: 'rTJ*1i
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package org.rut.util.algorithm.support; hxMV?\MYj
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import org.rut.util.algorithm.SortUtil; i[ >U#5
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/** fzA Fn$[
* @author treeroot y` {|D*
* @since 2006-2-2 bDm7$ (
* @version 1.0 F`GXho[
*/ *tv\5KW G
public class ImprovedMergeSort implements SortUtil.Sort { G4rzx%W?
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private static final int THRESHOLD = 10; PT }J.Dwx
@;x*~0GZ
/* !8D>Bczq)
* (non-Javadoc) 7&9w_iCkV
* CO9PQ`9+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?rA3<j
*/ Eg8b|!-')8
public void sort(int[] data) { q6ny2;/r
int[] temp=new int[data.length]; Zd88+GS,#
mergeSort(data,temp,0,data.length-1); #kh:GAp]
} p<zeaf0W
S^;;\0#NK
private void mergeSort(int[] data, int[] temp, int l, int r) { {9X mFa
int i, j, k; !Z 0U_*&
int mid = (l + r) / 2; s 0_*^cZ
if (l == r) (> _Lb
return; |rG)Q0H,
if ((mid - l) >= THRESHOLD) !dUdz7
mergeSort(data, temp, l, mid); EeT69o
else gwdAf%|f
insertSort(data, l, mid - l + 1); Pouo# 5
if ((r - mid) > THRESHOLD) 1)jeawVmj
mergeSort(data, temp, mid + 1, r); `SOQPAnK+;
else RRpY%-8M
insertSort(data, mid + 1, r - mid); \yZVn6GVr
i7Cuc+j8
for (i = l; i <= mid; i++) { 3%Eu$|B
temp = data; :U *8S\$
} n#}~/\P6
for (j = 1; j <= r - mid; j++) { ^#Mp@HK
temp[r - j + 1] = data[j + mid]; N/'
} cTS.yN({G
int a = temp[l]; \#WWJh"W
int b = temp[r]; jvAjnh#
for (i = l, j = r, k = l; k <= r; k++) { ;]b4O4C\
if (a < b) { TLp2a<Iy
data[k] = temp[i++]; Z4c'1-lh
a = temp; /qMnIo
} else { y:^o._
data[k] = temp[j--]; /]_|uN)Q
b = temp[j]; j"hEs(t
} S3i p?9
} #oFyi @U
} YM6 J:89
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/** )QRT/, ;c
* @param data }mzd23^W>P
* @param l idGn{f((f
* @param i `/'p1?Z"
*/ 1G.?Y3DC<
private void insertSort(int[] data, int start, int len) { ^1vKhO+p$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UP$>,05z6
} F_9 4k
} rfYa<M Qc
} lS#:u-k
} &M@c50&%
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堆排序： #z _<{' P"
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package org.rut.util.algorithm.support; 9<&M~(dwT4
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import org.rut.util.algorithm.SortUtil; CLk,]kA'r
\Vroz=IT:
/** X7AxI\h
* @author treeroot WcoA)we
* @since 2006-2-2 KvEv0L<ky
* @version 1.0 7s3=Fa:9Q
*/ iw=e"6V
public class HeapSort implements SortUtil.Sort{ sNcU>qjj6
6W{Nw<
/* (non-Javadoc) +Ugy=678Tr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) > Xh=P%
*/ Bpm COA
public void sort(int[] data) { 24k]X`/n
MaxHeap h=new MaxHeap(); tgl(*[T2
h.init(data); oA@M =
for(int i=0;i h.remove(); y<w_>O
System.arraycopy(h.queue,1,data,0,data.length); uR{)%udu
} :aomDK*
i{TPf1OY`M
private static class MaxHeap{ R`E:`t4G
-j]c(Q MA]
void init(int[] data){ `B4Ilh"d
this.queue=new int[data.length+1]; ~3M8"}X;L
for(int i=0;i queue[++size]=data; {6GX ?aw'
fixUp(size); "igA^^?X1N
} 1 :$#a
} )^AZmUYZ
\8!CKnfs
private int size=0; {U$XHG
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private int[] queue; Z37Dv;&ZD
- _8-i1?
public int get() { *?d\Zcj85[
return queue[1]; q~ ZUtF
} A{J?I:
^)Awjj9
public void remove() { Yl>Y.SO
SortUtil.swap(queue,1,size--); ;tVd+[8
fixDown(1); r7g@(K
} "yh2+97l
file://fixdown /g!ZU2&l
private void fixDown(int k) { xvl{o
int j; #n{4f1TZ
while ((j = k << 1) <= size) { @s cn ?t
if (j < size %26amp;%26amp; queue[j] j++; " "m-5PGYo
if (queue[k]>queue[j]) file://不用交换 9 @ <
break; d^nO&it
SortUtil.swap(queue,j,k); t0e5L{ QJ
k = j; ui,!_O .c
} IqFcrU$4
} I&#:/|{:5
private void fixUp(int k) { A+8)VlE\
while (k > 1) { "{qnm+G
int j = k >> 1; "qF/7`e[
if (queue[j]>queue[k]) \wsVO"/
break; 2wB*c9~
SortUtil.swap(queue,j,k); %L-qAI&V
k = j; /CO=!*7fz
} L&)e}"
} hZ452W
%a WRXW@c
} , +J)`+pJx
k<Gmb~Tg1
} .=Oww
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SortUtil： EjFpQ|-L|
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package org.rut.util.algorithm; ukEJD3i
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import org.rut.util.algorithm.support.BubbleSort; g[1>|Ax`'
import org.rut.util.algorithm.support.HeapSort; ]?H12xz
import org.rut.util.algorithm.support.ImprovedMergeSort; -K?lhu
import org.rut.util.algorithm.support.ImprovedQuickSort; ^*`#+*C
import org.rut.util.algorithm.support.InsertSort; CN ( :
import org.rut.util.algorithm.support.MergeSort; 0Zwx3[bq6K
import org.rut.util.algorithm.support.QuickSort; qhvT,"
import org.rut.util.algorithm.support.SelectionSort; 3{|~'5*
import org.rut.util.algorithm.support.ShellSort; 1!G}*38;
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/** ; 8DtnnE
* @author treeroot BRM `/s
* @since 2006-2-2 {g1"{
* @version 1.0 Ul/m]b6-
*/ \1joW#
public class SortUtil { 9%|skTgIqH
public final static int INSERT = 1; dWkQ NFKF
public final static int BUBBLE = 2; 'A.5T%n-
public final static int SELECTION = 3; (>A#|N1U
public final static int SHELL = 4; [(_,\:L${
public final static int QUICK = 5; ,)*[Xa_n
public final static int IMPROVED_QUICK = 6; aWJ BYw6{L
public final static int MERGE = 7; PkyX,mr#1
public final static int IMPROVED_MERGE = 8; i&lW&]
public final static int HEAP = 9; 68h1Wjg:"!
4hxP`!<
public static void sort(int[] data) { S-o)d
sort(data, IMPROVED_QUICK); P HOngn
} { "Cu)AFy
private static String[] name={ Hy\q{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `.O$RwC&7B
}; FWW@t1)
/iM1
private static Sort[] impl=new Sort[]{ G\MeJSt*
new InsertSort(), K;"oK
new BubbleSort(), 0LL65[
new SelectionSort(), V6[jhdb
new ShellSort(), )@I] Rk?
new QuickSort(), +C7E]0!r
new ImprovedQuickSort(), pXlqE,
new MergeSort(), m-\_L=QzM
new ImprovedMergeSort(), GB}\7a
new HeapSort() HAI)+J
}; %vy,A*
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public static String toString(int algorithm){ f/8&-L
return name[algorithm-1]; &x\)] i2f
} nTo?~=b
IFew3!{\
public static void sort(int[] data, int algorithm) { goyDG/
impl[algorithm-1].sort(data); U4-RI]Cpf
} $$.q6
,.(:b82$
public static interface Sort { 5lD`qY
public void sort(int[] data); YHom9&A
} }]dzY(
1+-Go}I
public static void swap(int[] data, int i, int j) { Kgi`@`
int temp = data; 7J5jf231
data = data[j]; eDP&W$s#
data[j] = temp; 12'MzIsU's
} ,N,@9p
} o:ow"cOEf