[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; ucM.Ro=@
} ~oFh>9u
int i1=l; -lnevrl
int i2=mid+1; ;NG1{]|Z
for(int cur=l;cur<=r;cur++){ Gl;f#}
if(i1==mid+1) xFX&9^Uk
data[cur]=temp[i2++]; ['t8C
else if(i2>r) ;q&0,B
data[cur]=temp[i1++]; /f]/8b g>
else if(temp[i1] data[cur]=temp[i1++]; GEfY^!F+
else U2UyN9:6F
data[cur]=temp[i2++]; :iEAUM
} P'F~\**5
} g8v[)o(qd
)-#i8?y3C
} `:gYXeR
yU!GS-
改进后的归并排序: :ln/`_
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package org.rut.util.algorithm.support; NQ{-&#@/v
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import org.rut.util.algorithm.SortUtil; }Az'Zu4 =
z \^
/** gi 5XP]z
* @author treeroot Iy.mVtcsZ
* @since 2006-2-2 ZR6&AiL(Bj
* @version 1.0 %HVD^. V
*/ 22'vm~2E
public class ImprovedMergeSort implements SortUtil.Sort { &L'6KEahR
VH<e))5C
private static final int THRESHOLD = 10; _[%n ~6
nUqL\(UuY
/* ?cJA^W
* (non-Javadoc) ]7l{g9?ZtV
* (QKsB3X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SlN"(nq
*/ ,@479ZvvR3
public void sort(int[] data) { &~}@u[=ux
int[] temp=new int[data.length]; vgN@~Xa
mergeSort(data,temp,0,data.length-1); zQt1;bo
} u`+'lBE,
F#KF6)P
private void mergeSort(int[] data, int[] temp, int l, int r) { [brkx3h
int i, j, k; G}q<{<+$
int mid = (l + r) / 2; q55M8B 4w
if (l == r) yH+c#w
return; }EP|Mb
if ((mid - l) >= THRESHOLD) I<KCt2:X
mergeSort(data, temp, l, mid); ovSH}h!
else P]-#wz=S
insertSort(data, l, mid - l + 1); Y=|CPE%V
if ((r - mid) > THRESHOLD) /wlFD,+8
mergeSort(data, temp, mid + 1, r); I[%M!_+
else hu&n=6
insertSort(data, mid + 1, r - mid); IG&B2*
)Z&HuEg{ZR
for (i = l; i <= mid; i++) { w?i)/q
temp = data; :S#i9# aB
} }q]jjs
for (j = 1; j <= r - mid; j++) { oHk27U G
temp[r - j + 1] = data[j + mid]; [)0 R'xL6
} y%FYXwR{
int a = temp[l]; gz#+
int b = temp[r]; sX Z4U0#
for (i = l, j = r, k = l; k <= r; k++) { 0yKhp:^
if (a < b) { C,(j$Id
data[k] = temp[i++]; t)KPp|&
a = temp; ,,7.=#
} else { l*qk1H"g
data[k] = temp[j--]; w~p4S+k&
b = temp[j]; sc9]sIb
} yj'Cy8
} `LqnEutzc
} \Me"'.F?
eA1'qww"'
/** 8'n#O>V@
* @param data HMhLTl{;
* @param l !@A|L#*
* @param i ps"9;4P
*/ Vl-D<M+ih
private void insertSort(int[] data, int start, int len) { y&h~Oa?,;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VYHOk3
} ZrA Um
} 8z?$t-DO
} mcCB7<. e
} w gmWo8
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堆排序： eXc[3ceUr
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package org.rut.util.algorithm.support; f^~2^p 1te
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import org.rut.util.algorithm.SortUtil; s *K:IgJ/
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/** } mgVC
* @author treeroot aE}=^%D
* @since 2006-2-2 v [dAywW
* @version 1.0 { qjUI
*/ 1]HHe*'Z
public class HeapSort implements SortUtil.Sort{ X,&`WPA:S
0,bt^a
/* (non-Javadoc) V,E9Uds
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *Gf&q
*/ =Z^un&'
public void sort(int[] data) { )eVzSj>MT
MaxHeap h=new MaxHeap(); ybC-f'0
h.init(data); ,#=eu85'
for(int i=0;i h.remove(); ixg\[5.Q+
System.arraycopy(h.queue,1,data,0,data.length); n<=y"*
} x,}ez
w' .'Yu6
private static class MaxHeap{ y(V&z"wk[
B$@1QG
void init(int[] data){ .vN)A *
this.queue=new int[data.length+1]; /nwxuy
for(int i=0;i queue[++size]=data; uwmoM>I W^
fixUp(size); 6Q?BwD+>
} :vw0r`
} cn@03&dAl
c]S+70!n
private int size=0; U<K|jsFo
*Rz!i m|
private int[] queue; jQO*oq}
pHigxeV2
public int get() { u<$S>
return queue[1]; /5&3WG&<u
} E*Pz <
| pF5`dX
public void remove() { 7k.d|<mRv
SortUtil.swap(queue,1,size--); ]6jHIk|
fixDown(1); /j`i/Ha1
} N'htcC
file://fixdown f34_?F<h
private void fixDown(int k) { 6s> sj7
int j; ~W2:NQ>i
while ((j = k << 1) <= size) { 9yO{JgKA
if (j < size %26amp;%26amp; queue[j] j++; qn5yD!1
if (queue[k]>queue[j]) file://不用交换 @?'t@P:4
break; ~JAH-R
SortUtil.swap(queue,j,k); c(QG4.)m
k = j; ?ykVfO'
} 2,rY\Nu_
} f+Pg1Q0zI
private void fixUp(int k) { ZD$-V3e`
while (k > 1) { p7%0hLW
int j = k >> 1; nh _DEPMq
if (queue[j]>queue[k]) JsZAP
break; %@M00~-
SortUtil.swap(queue,j,k); AGw1Pl8]K
k = j; EGp~Vo-
} %i;r]z-
} {JCSR2BB
v!WU |=u
} QC$=Fs5+
QCZ,K"y
} U>e3_td3,
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SortUtil： _C7abw-
n's2/9x
package org.rut.util.algorithm; x@{G(W:W
.6lY*LI
import org.rut.util.algorithm.support.BubbleSort; Y&ct+w]%
import org.rut.util.algorithm.support.HeapSort; ujI 3tsl
import org.rut.util.algorithm.support.ImprovedMergeSort; u5[1Z|O
import org.rut.util.algorithm.support.ImprovedQuickSort; ?^+#pcX]t|
import org.rut.util.algorithm.support.InsertSort; 4d{"S02h
import org.rut.util.algorithm.support.MergeSort; r[C3u[
import org.rut.util.algorithm.support.QuickSort; F{a0X0ru~
import org.rut.util.algorithm.support.SelectionSort; S!`4Bl
import org.rut.util.algorithm.support.ShellSort; @d8&3@{R^
-D.BJ(
/** EM>c%BH<N
* @author treeroot eONeWY9
* @since 2006-2-2 .y/NudD
* @version 1.0 m'G?0^Ft
*/ >Hd~Ca>
public class SortUtil { 0 .6X{kO
public final static int INSERT = 1; ,kGw;8X
public final static int BUBBLE = 2; N"q+UCRC
public final static int SELECTION = 3; UUdu;3E=5
public final static int SHELL = 4; $sd3h\P&R
public final static int QUICK = 5; ];d5X
public final static int IMPROVED_QUICK = 6; 1C5kS[!
public final static int MERGE = 7; r| 6S
public final static int IMPROVED_MERGE = 8; eR#gG^o8
public final static int HEAP = 9; 3iwoMrp
"w:\@Jwu(
public static void sort(int[] data) { |k['wqn"
sort(data, IMPROVED_QUICK); YoSo0fQA
} ?<>,XyY
private static String[] name={ X:xC>4]gG'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D7gX,e
}; cEh0Vh-]
.,d$%lN
private static Sort[] impl=new Sort[]{ ^a:vJ)WB7
new InsertSort(), e4>L@7
new BubbleSort(), 7Ap~7)z[
new SelectionSort(), XNkQk0i;g&
new ShellSort(), (dO'_s&M]/
new QuickSort(), )<]w23i
new ImprovedQuickSort(), LX(iuf+l
new MergeSort(), 4z-,M7iP
new ImprovedMergeSort(), @'F8|I 6
new HeapSort() Oo3qiw
}; _.Z&<.lJ
<'o'H
public static String toString(int algorithm){ %z!d4J75
return name[algorithm-1]; {"gyXDE1
} Xn ZX *Y]"
..Uw8u/
public static void sort(int[] data, int algorithm) { 2]_4&mU
impl[algorithm-1].sort(data); pjmGzK
} }LHT#{+x
\Z6gXO_
public static interface Sort { @gu77^='
public void sort(int[] data); }jyS\drJ
} xsY>{/C
dEAAm=K,<
public static void swap(int[] data, int i, int j) { 2EqsfU* I
int temp = data; =yhn8t7@]
data = data[j]; N,sqrk]
data[j] = temp; H8o%H=I%
} 8 /RfNGY
} E |GK3/