[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; `oO*ORq&
} N /;Vg^Wx
int i1=l; Qo(<>d
int i2=mid+1; -Vmp6XY3q
for(int cur=l;cur<=r;cur++){ 11A$#\,
if(i1==mid+1) Z% `$id
data[cur]=temp[i2++]; @6;ZP1
else if(i2>r) 0uGTc[^^M
data[cur]=temp[i1++]; cp`ZeLz2^
else if(temp[i1] data[cur]=temp[i1++]; $(yi+v
else rNke&z:%X_
data[cur]=temp[i2++]; @!!5el {
} \m<$qp,n
} \4fuC6d2
i8*(J-M
} \2Q#'
R=iwp%c(
改进后的归并排序: T#H-GOY:
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package org.rut.util.algorithm.support; +t]Ge >S
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import org.rut.util.algorithm.SortUtil; +}mj;3i
pQ ul0]
/** zf\$T,t)
* @author treeroot :$XlYJrjK
* @since 2006-2-2 pG v*{.
* @version 1.0 |$GPJaNqa
*/ Hr}\-$
public class ImprovedMergeSort implements SortUtil.Sort { GJF ,w{J
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private static final int THRESHOLD = 10; dD 6jMl
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/* *iSE)[W
* (non-Javadoc) $>wN:uN(
* .F\[AD 5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Iq{/-,v
*/ Nk$|nn9#'
public void sort(int[] data) { J'wJe,
int[] temp=new int[data.length]; >@Na6BH5v
mergeSort(data,temp,0,data.length-1); |b!Bb<5
} 0yb9R/3.
VAdUd {
private void mergeSort(int[] data, int[] temp, int l, int r) { g/i.b&
int i, j, k; {3Dm/u%=9|
int mid = (l + r) / 2; _?Ly7*UML
if (l == r) 90=gP
return; T-js*
if ((mid - l) >= THRESHOLD) uy|]@|J
mergeSort(data, temp, l, mid); (3j f_
else !G'wC0
insertSort(data, l, mid - l + 1); &}_tALg
if ((r - mid) > THRESHOLD) )~w bu2;
mergeSort(data, temp, mid + 1, r); )L"J?wTe
else qE6D"+1y7
insertSort(data, mid + 1, r - mid); Z|3[Y@c\
{{ 1qkG9$
for (i = l; i <= mid; i++) { oRmA\R*
temp = data; GIS,EwA
} 2H~E~6G
for (j = 1; j <= r - mid; j++) { #1'p?%K.
temp[r - j + 1] = data[j + mid]; ^*,?x
} J8&0l&~6
int a = temp[l]; &~=d;llkT
int b = temp[r]; LO%OH u}]
for (i = l, j = r, k = l; k <= r; k++) { _akpW
if (a < b) { BMn`t@!x
data[k] = temp[i++]; , LqfwA|
a = temp; _|COnm
} else { HeHo?<>|d
data[k] = temp[j--]; :?)q"hE
b = temp[j]; H[?l)nZ}
} anH]]
} Zo Ra^o
} :vE\r#hJ"
"(p&Oz
/** fz+dOIU3\L
* @param data )qDV3
* @param l 6ziBGU#.-
* @param i [E qZj/
*/ ?]_A~_J!
private void insertSort(int[] data, int start, int len) { - G=doP0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7Ewq'Vu`y
} *M6j)jqV
} D@ BP<
} i\ )$
} b,#?LdQ%
~#=70
堆排序： Ece=loV*l
hz-^9U
package org.rut.util.algorithm.support; U@LIw6B!KL
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import org.rut.util.algorithm.SortUtil; 87R$Y> V
=o[H2o y
/** {t('`z
* @author treeroot oe=W}y_k
* @since 2006-2-2 VexQ ]
* @version 1.0 (%4O\s#l
*/ VE^IA\J x
public class HeapSort implements SortUtil.Sort{ r <2&_$|
NLev(B:OQH
/* (non-Javadoc) O7f"8|=HX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e8)8QmB{o
*/ G;J!3A;TE
public void sort(int[] data) { o4YF,c+>q
MaxHeap h=new MaxHeap(); /Em6+DN>
h.init(data); VB=jKMi
for(int i=0;i h.remove(); `bNLmTS
System.arraycopy(h.queue,1,data,0,data.length); 'D^@e0.3
} a.XMeB
jq(rnbV
private static class MaxHeap{ u/` t+-A
8@KGc )k
void init(int[] data){ _$T.N
this.queue=new int[data.length+1]; D\z`+TyJ
for(int i=0;i queue[++size]=data; p<Vj<6.=?
fixUp(size); y6>fK@K~
} ~@D{&7@
} iMF-TR
w#>CYP`0k6
private int size=0; 7C~g?1
$T*g@]
private int[] queue; 8HDI]
^B(:Hv}G(:
public int get() { bG]?AiWr
return queue[1]; 3Io7!:+
} xp]_>WGq
B~u`bn,iQ
public void remove() { jjg[v""3|
SortUtil.swap(queue,1,size--); "X-"uIc
fixDown(1); 2nI^fVR%\
} uh3<%9#\k
file://fixdown H `_{n<
private void fixDown(int k) { 5Qxm\?0J
int j; L ?S#3@Pa
while ((j = k << 1) <= size) { -'j|U[&N\
if (j < size %26amp;%26amp; queue[j] j++; *,Sa*-7(
if (queue[k]>queue[j]) file://不用交换 `m-7L
break; E~`<n]{G-C
SortUtil.swap(queue,j,k); LC0g"{M
k = j; ]KQBek#DD
} ]fU0;jzX
} vk3C&!M<a
private void fixUp(int k) { Bv^5L>JZ/
while (k > 1) { .QDeS|l
int j = k >> 1; P5Pb2|\*
if (queue[j]>queue[k]) Y58et9gRO
break; piAFxS<6
SortUtil.swap(queue,j,k); 9-Xr
k = j; E7@m& R
} A7aW]
} #6 M3BF
,UW!?}@
} Uq(fk9`6
}i9VV+L#1
} G]gc*\4
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SortUtil： }%S#d&wh$_
p u[S
package org.rut.util.algorithm; ]U.*KkQ
@}_Wl<kn
import org.rut.util.algorithm.support.BubbleSort; +.66Ky`|[
import org.rut.util.algorithm.support.HeapSort; WdTiao,r
import org.rut.util.algorithm.support.ImprovedMergeSort; Z (C0+A\
import org.rut.util.algorithm.support.ImprovedQuickSort; GNoUn7Y
import org.rut.util.algorithm.support.InsertSort; uX+ YH
import org.rut.util.algorithm.support.MergeSort; 8]l(D
import org.rut.util.algorithm.support.QuickSort; \s,~|0_V
import org.rut.util.algorithm.support.SelectionSort; v=E(U4v9e
import org.rut.util.algorithm.support.ShellSort; 7K /quJ
c{})Z=
/** hfRxZ>O2
* @author treeroot 0!q@b
* @since 2006-2-2 i: VMCNH
* @version 1.0 IkgRZ{Y
*/ x\K,@
public class SortUtil { |6b&khAM
public final static int INSERT = 1; %G'P!xQhy
public final static int BUBBLE = 2; ?l^NKbw
public final static int SELECTION = 3; 8]xYE19=
public final static int SHELL = 4; S.*LsrSV
public final static int QUICK = 5; _''9-t;n,
public final static int IMPROVED_QUICK = 6; hWRr#030
public final static int MERGE = 7; {z |+.D
public final static int IMPROVED_MERGE = 8; (E7C9U*
public final static int HEAP = 9; sQMfU{S /
,(z"s8N
public static void sort(int[] data) { h|OWtf4
sort(data, IMPROVED_QUICK); `"y:/F"{
} @$5=4HA
private static String[] name={ {EyWSf"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?I;PJj
}; B1b9 JS(>
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private static Sort[] impl=new Sort[]{ C{]1+eL
new InsertSort(), KDLrt
new BubbleSort(), O+ xzM[[
new SelectionSort(), PySFhb@
new ShellSort(), yMJ(Sf
new QuickSort(), =!DpWVsQ
new ImprovedQuickSort(), -BEd7@?A
new MergeSort(), yhd]s0(!
new ImprovedMergeSort(), W@Rb"5Gy+
new HeapSort() @81N{tg-
}; ricL.[v9S
) RNB;K~s9
public static String toString(int algorithm){ ma@!"Z8S
return name[algorithm-1]; JHg y&/
} t/h,-x
Sgn<=8,6c
public static void sort(int[] data, int algorithm) { 'j\mz5#s
impl[algorithm-1].sort(data); DJ|lel/'
} =!IoL7x
_a zJ>
public static interface Sort { k;jXVa
public void sort(int[] data); Qn)AS1pL+
} &A~hM[-
hY|-l%2f
public static void swap(int[] data, int i, int j) { $Ao'mT
int temp = data; *Nur>11D
data = data[j]; ,n&Lp
data[j] = temp; \W7pSV-U
} t@q==VHF
} DY1"t7 9E