[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; B3t>M) 9
} NETC{:j
int i1=l; TjK5UML
int i2=mid+1; a0.3$
for(int cur=l;cur<=r;cur++){ wg.fo:Q
if(i1==mid+1) LD~'^+W
data[cur]=temp[i2++]; |P7f^0idk
else if(i2>r) z{0;%E
data[cur]=temp[i1++]; rM=A"
else if(temp[i1] data[cur]=temp[i1++]; z=_{jjs
else cB}2(`z9 B
data[cur]=temp[i2++]; 6<$|;w-OV
} 3/=QZ8HA&-
} Nt-SCLDM
2H+DT-hK
} .6F3;bg R7
f{c[_OR
改进后的归并排序: b[;3KmUB
J\$l3i/I
package org.rut.util.algorithm.support; 3F}KrG
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import org.rut.util.algorithm.SortUtil; }C"*ACjF
$#FlnM<=
/** 5@+Ei25
* @author treeroot HHTsHb{7
* @since 2006-2-2 }a1Sfl@`3
* @version 1.0 e=UVsYNx
*/ /B\-DP3K
public class ImprovedMergeSort implements SortUtil.Sort { {/xs9.8:JX
Sw@,<4S
private static final int THRESHOLD = 10; `A _8nW)
)$h9Y
/* uEGPgYY(
* (non-Javadoc) tZCe?n]
* *Yu\YjLPG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K[gWXBP
*/ U.7y8#qf3R
public void sort(int[] data) { xqC<p`?4
int[] temp=new int[data.length]; qZsddll
mergeSort(data,temp,0,data.length-1); UZ\*]mxT
} y*b.eO
k-pEBhOH
private void mergeSort(int[] data, int[] temp, int l, int r) { Ji:iKkI
int i, j, k; YATdGLTeq
int mid = (l + r) / 2; a950M7
if (l == r) DGZY~(]
return; ivX37,B\bS
if ((mid - l) >= THRESHOLD) ?6iatI !
mergeSort(data, temp, l, mid); 4JZHjf0M6
else iE^a%|?}
insertSort(data, l, mid - l + 1); )ClMw!ZrU
if ((r - mid) > THRESHOLD) Ryq"\Q>+
mergeSort(data, temp, mid + 1, r); bLM"t0
else yD"0=\
insertSort(data, mid + 1, r - mid); \;*}zX
'#N5i
for (i = l; i <= mid; i++) { $?)3&\)R
temp = data; jfY{z=*]u
} C. Ja;RFq
for (j = 1; j <= r - mid; j++) { Lubs{-5lk
temp[r - j + 1] = data[j + mid]; xe6_RO%
} fcE)V#c"g
int a = temp[l]; t+ S~u^
int b = temp[r]; W>0"CUp
for (i = l, j = r, k = l; k <= r; k++) { 1U7,X6=~
if (a < b) { zd9]qo
data[k] = temp[i++]; f>8B'%]
a = temp; fNqmTRu
} else { O*rmD<L$
data[k] = temp[j--]; ^b"bRQqm
b = temp[j]; NYjS
} lkg"'p{
} ~n/Aq*
} !2Y!jz
Dr6s^}}~n
/** *t.q m5h
* @param data g%\$ !b
* @param l i-k >U}[%
* @param i fK'.wX9
*/ B [+(r
private void insertSort(int[] data, int start, int len) { ,!I?)hwOC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CQSpPQA
} _hy{F%}
} *qPdZ
} `V&1]C8x
} `S\zqF<
D1X4|Q*SK
堆排序： ou'~{-_xd
I/On3"U%
package org.rut.util.algorithm.support; 2~!R*i
pcy<2UV
import org.rut.util.algorithm.SortUtil; z.3<{-n}0i
}!%JYG^!D
/** V uG?B{
* @author treeroot iuC7Y|
* @since 2006-2-2 p^1zIC>F
* @version 1.0 g@~!kh,TH
*/ ]*N:;J
public class HeapSort implements SortUtil.Sort{ V@D]bV@4
VEj$^bpp5s
/* (non-Javadoc) M18qa,fK{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BXg!zW%+
*/ |h&<_9
public void sort(int[] data) { u8YB)kG
MaxHeap h=new MaxHeap(); Kt W6AZJ
h.init(data); T[;;9z
for(int i=0;i h.remove(); e74zR6
System.arraycopy(h.queue,1,data,0,data.length); ]~-*hOcQ4
} T><{ze
(CdJ;-@D
private static class MaxHeap{ z %x7fe
0"EoC
void init(int[] data){ i"vawxm
this.queue=new int[data.length+1]; vSOT*0r
for(int i=0;i queue[++size]=data; Q>.BQ;q]
fixUp(size); TQP+>nS,
} iF!mV5#
} 55.;+B5L*
'p%=<0vrr
private int size=0; 8-7dokg>
#HeM,;Xp
private int[] queue; s/ M7Zl
k$h [8l(<
public int get() { )^4hQ3BS
return queue[1]; Q1Ux!$_
} EYL]TeS
b"``D ?
public void remove() { 9UwLF`XM
SortUtil.swap(queue,1,size--); >$\Bu]{1
fixDown(1); N{8"s&
} -hWC_X:9jP
file://fixdown iq?l#}]
private void fixDown(int k) { 2i\Q@h
int j; 79ckLd9
while ((j = k << 1) <= size) { GnFs63
if (j < size %26amp;%26amp; queue[j] j++; 845 W>B
if (queue[k]>queue[j]) file://不用交换 "PMQyzl
break; P z ?m>>#
SortUtil.swap(queue,j,k); #^6^
k = j; <l$P&jSF3
} 740B\pc0
} Yi(1^'Bi
private void fixUp(int k) { jin db#)bz
while (k > 1) { I"@p aLZ
int j = k >> 1; o#>a 5
if (queue[j]>queue[k]) 9#7J:PfZ<
break; %,\=s.~1
SortUtil.swap(queue,j,k); !Xj#@e
k = j; s)zJT
} a(;!O}3_)(
} 3e%nA8?
BcQEG *N
} %@?A_jS
m:uPEpcU
} 3`*Kav>"
f'X9HU{Cz
SortUtil： .2W"w)$nuq
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package org.rut.util.algorithm; 1!1!PA9u
5G[x}4U
import org.rut.util.algorithm.support.BubbleSort; $A2n{
import org.rut.util.algorithm.support.HeapSort; p@~ic#X
import org.rut.util.algorithm.support.ImprovedMergeSort; Qd]we$G
import org.rut.util.algorithm.support.ImprovedQuickSort; ST1'\Eo
import org.rut.util.algorithm.support.InsertSort; j.m(ltGh
import org.rut.util.algorithm.support.MergeSort; z.36;yT/
import org.rut.util.algorithm.support.QuickSort; Es!Q8.
import org.rut.util.algorithm.support.SelectionSort; &xXEnV
import org.rut.util.algorithm.support.ShellSort; fBhoGA{=g
+lE90y
/** dtZE67KS
* @author treeroot 5'KA'>@
* @since 2006-2-2 s@8w-]"
* @version 1.0 -]srp;=i
*/ `JB?c
public class SortUtil { $,3J7l3
public final static int INSERT = 1; %Ip*Kq-
public final static int BUBBLE = 2; :YP#
public final static int SELECTION = 3; );FS7R
public final static int SHELL = 4; @n-r-Q
public final static int QUICK = 5; `d\r;cE%lm
public final static int IMPROVED_QUICK = 6; hI},~af
public final static int MERGE = 7; Jrxz'9qRG
public final static int IMPROVED_MERGE = 8; oD9^ID+
public final static int HEAP = 9; $q$7^r@
bQ'8SCe
public static void sort(int[] data) { jYRP8 Yi
sort(data, IMPROVED_QUICK); 424(3-/v;
} FAsFjRS
private static String[] name={ *=AqM14 @
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3^?ZG^V
}; rG}\Zjn{
99xEm
private static Sort[] impl=new Sort[]{ nUS| sh
new InsertSort(), S35~Cp
new BubbleSort(), _ :Ag?2
new SelectionSort(), En{`@JsM
new ShellSort(), U8.7>ENnP&
new QuickSort(), @$9'@")
new ImprovedQuickSort(), f>`dF?^6
new MergeSort(), 9h&R]yz;
new ImprovedMergeSort(), $5x ,6[&
new HeapSort() JjaoOe
}; SZaS;hhhHu
k:jSbbQ
public static String toString(int algorithm){ b 5yW_Ozdh
return name[algorithm-1]; (T`E!A0I\?
} *(C(tPhC
o1M$.*
public static void sort(int[] data, int algorithm) { "&/-N[is
impl[algorithm-1].sort(data); P3$Q&^?
} 8J$|NYv_b
iQDx{m3]
public static interface Sort { $9Hcdbdm
public void sort(int[] data); BauU{:Sh
} =UUU$hq2
-f*P nxg
public static void swap(int[] data, int i, int j) { `tP7ncky
int temp = data; .L'.c/ s
data = data[j]; wF((
data[j] = temp; ns6(cJ^a
} 0a80 LAK
} D$t k<{)oB