[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; B%Qo6*b
} EU:N9oT
int i1=l; ub>:dNBN
int i2=mid+1; Qu'#~#L`
for(int cur=l;cur<=r;cur++){ H#YI7l2
if(i1==mid+1) /"A=Yf
data[cur]=temp[i2++]; ai?J
else if(i2>r) 2Ul8<${c{
data[cur]=temp[i1++]; EHf,VIC8
else if(temp[i1] data[cur]=temp[i1++]; V~/@KU8cH
else '9.@r\g
data[cur]=temp[i2++]; M"s:*c_6
} !^MwE]
} ue7D' UZL>
n]4Elrxx
} (#>X*~6
FywX
改进后的归并排序: u5rvrn ]
%`5K8eB
package org.rut.util.algorithm.support; )ej1)RU"
;Qt/(/
import org.rut.util.algorithm.SortUtil; 'Y ,2CN
,Il) tH
/** =d"5kDK-m
* @author treeroot {#?|&n<
* @since 2006-2-2 =EYgck;)
* @version 1.0 xqg4b{
*/ kGnT4R*E
public class ImprovedMergeSort implements SortUtil.Sort { SOsz=bVx
,jz~Np_2
private static final int THRESHOLD = 10; @ls/3`E/5E
nJv=kk1|o
/* &gT@oS{
* (non-Javadoc) |LLpG37_
* PY '^:0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g^|R;s{
*/ K5`*Y@
public void sort(int[] data) { lcpiCZ
int[] temp=new int[data.length]; gx^!&>eIb#
mergeSort(data,temp,0,data.length-1); j7w9H/XF}
} G{X7;j e
,m0M:!hK
private void mergeSort(int[] data, int[] temp, int l, int r) { SFwY%2np)!
int i, j, k; aYk: CYQ
int mid = (l + r) / 2; WB'1_a
if (l == r) x.pg3mVd>
return; ,2FI?}+R
if ((mid - l) >= THRESHOLD) se>\5k
mergeSort(data, temp, l, mid); +]wM$bP
else ]FvGAG.*
insertSort(data, l, mid - l + 1); /!>OWh*~
if ((r - mid) > THRESHOLD) ct,;V/Dx
mergeSort(data, temp, mid + 1, r); JP( tf+
else O.y ?q
insertSort(data, mid + 1, r - mid); NB^Al/V@
DS@Yto
for (i = l; i <= mid; i++) { L|(U%$
temp = data; bxO/FrwTj{
} hCgk78O?
for (j = 1; j <= r - mid; j++) { H*N{4zBB
temp[r - j + 1] = data[j + mid]; iC!6g|]X
} @aFk|.6
int a = temp[l]; jd5kkX8=
int b = temp[r]; o4yl3o
for (i = l, j = r, k = l; k <= r; k++) { q6sb;?I
if (a < b) { F+BCzsm7$
data[k] = temp[i++]; OA}; pQ9QN
a = temp; z"QtP[_m
} else { sL\ {.ad5
data[k] = temp[j--]; ?+Vi !eS
b = temp[j]; >hG*=4oh
} mv,a>Cvs[
} !RwhVaSh
} X6t9*|C
Vep41\g^
/** vQ2{+5!|
* @param data iY,oaC~?"N
* @param l pJl/d;Cyrb
* @param i SEi\H$!
*/ |)&d9|]
private void insertSort(int[] data, int start, int len) { -U_,RMw~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); - 3PLP$P
} sy4Nm0m
} !v%>W< 3Q
} }C/+zF6q
} }|M:MJ`
GA[bo)"
堆排序： H{9P=l
;:R2 P@6f
package org.rut.util.algorithm.support; ;0?OBUDO
}1Mf0S
import org.rut.util.algorithm.SortUtil; DVg$rm`
W 9}xfy09
/** BKE?o^03
* @author treeroot ~h=iZ/g_^_
* @since 2006-2-2 ;GOu'34j
* @version 1.0 IBu\Sh-
*/ fshG ~L7S9
public class HeapSort implements SortUtil.Sort{ Ar?ZUASJ
cQBc6eAi
/* (non-Javadoc) j]R[;8g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `2x.-
*/ gnxD'1_
public void sort(int[] data) { _X=6M gU
MaxHeap h=new MaxHeap(); .J+F HG'
h.init(data); $T7 qd
for(int i=0;i h.remove(); [>3dhj[;
System.arraycopy(h.queue,1,data,0,data.length); B/n~ $
} 7(^F@,,@
9v3n4=gc
private static class MaxHeap{ t6\--lk_
#mK?:O\-1
void init(int[] data){ `GCK%evLG
this.queue=new int[data.length+1]; OTJMS_IT
for(int i=0;i queue[++size]=data; D~M R)z_p~
fixUp(size); T:|p[Xbo
} E:PPb9Kd
} f4+wP/n&
m^TN6/])
private int size=0; ObS#aRq
&uBfsa$
private int[] queue; B8.}9
a+a6P5kJ
public int get() { Iij$ce`nx
return queue[1]; O2="'w'kR
} ~kDJ-V
D+~*nc~ g
public void remove() { e5 zi"~
SortUtil.swap(queue,1,size--); )vVf- zU
fixDown(1); WQD:~*C:
} 'Yc^9;C(
file://fixdown hH%fWB2(
private void fixDown(int k) { p1HbD`ST
int j; F8Mf,jnPs
while ((j = k << 1) <= size) { m!P<# |V
if (j < size %26amp;%26amp; queue[j] j++; ^}wF^ _
if (queue[k]>queue[j]) file://不用交换 fH:S_7i
break; T-/3 A%v
SortUtil.swap(queue,j,k); k9:|CEP
k = j; Rr[Wka9[
} owVks-/
} .n)R@&9
private void fixUp(int k) { Z'}%Mkm`i}
while (k > 1) { +o"CMI
int j = k >> 1; D.x8=|;
if (queue[j]>queue[k]) e+4Eiv
break; ~%f$}{
SortUtil.swap(queue,j,k); DQ[7p(
k = j; O/d]2<V
} _Rkvg-
} 'd&4MA0X
t imY0fx#
} ;Bzx}7A
6iF&!Fd>J
} uwZ,l-6T
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SortUtil： *,*O.#<6
t*A[v
package org.rut.util.algorithm; lQvgq
`YE=B{q
import org.rut.util.algorithm.support.BubbleSort; d%epM5
import org.rut.util.algorithm.support.HeapSort; -/0\_zq7
import org.rut.util.algorithm.support.ImprovedMergeSort; r)K5<[\r
import org.rut.util.algorithm.support.ImprovedQuickSort; 8"-=+w.CZ
import org.rut.util.algorithm.support.InsertSort; ~w|h;*Bj
import org.rut.util.algorithm.support.MergeSort; yG7H>LF?8
import org.rut.util.algorithm.support.QuickSort; :l1-s]
import org.rut.util.algorithm.support.SelectionSort; B$x@I\(M
import org.rut.util.algorithm.support.ShellSort; BT_XqO
llWY7u"
/** v>Kh5H5e~
* @author treeroot 748:* (O
* @since 2006-2-2 HpfZgkC+
* @version 1.0 '`2MxRP
*/ xa<KF
public class SortUtil { O"\_%=X9
public final static int INSERT = 1; }Bsh!3D<.
public final static int BUBBLE = 2; #)twk`!^
public final static int SELECTION = 3; ABkDOG2br
public final static int SHELL = 4; x|dP-E41\
public final static int QUICK = 5; qBh@^GxY),
public final static int IMPROVED_QUICK = 6; oSkQ/5hg.
public final static int MERGE = 7; bR~(Ry`
public final static int IMPROVED_MERGE = 8; _;Xlw{FN^
public final static int HEAP = 9; tgi%#8ZDpz
vR2);ywX
public static void sort(int[] data) { Dc$q0|N=z
sort(data, IMPROVED_QUICK); Pc< "qy
} L%Rw]=v}v
private static String[] name={ eB1NM<V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D M+MBK
}; 3!fR'L/i
cRD;a?0/6s
private static Sort[] impl=new Sort[]{ 5dN>Xjpu
new InsertSort(), dg|x(p#
new BubbleSort(), ecoI-@CAI
new SelectionSort(), 8sc2r
new ShellSort(), H@$K/
new QuickSort(), Q#Zazvk
new ImprovedQuickSort(), 8#Z)qQWi_t
new MergeSort(), KB :JVK^<
new ImprovedMergeSort(), F~ \ONO5
new HeapSort() hif;atO
}; YlGUd~$`"+
yUpN`;
public static String toString(int algorithm){ YI"!&a'yj
return name[algorithm-1]; I *sT*;U
} 8Q<Nl=g>'
R%\3[
public static void sort(int[] data, int algorithm) { -Fn/=
impl[algorithm-1].sort(data); '/9j"mIA9$
} `Ds=a`^b
mI4GBp
public static interface Sort { hZL!%sL7
public void sort(int[] data); vo\'ycPv
} 9< 07# 8c.
e@0|fB%2
public static void swap(int[] data, int i, int j) { <3@nv%
int temp = data; !-470J
data = data[j]; ol/@)k^s>
data[j] = temp; 7=}tJ
} +pYwc0~
} 0=6mb]VUi=