[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Qg8eq_m(
} 3`C3+
int i1=l; ~jrU#<'G9
int i2=mid+1; y|2g"J
for(int cur=l;cur<=r;cur++){ f|HgLFx
if(i1==mid+1) 8mQd*GGu1
data[cur]=temp[i2++]; 6b1 Uj<
else if(i2>r) L52z
data[cur]=temp[i1++]; fh5^Gd~
else if(temp[i1] data[cur]=temp[i1++]; v*T@<]f3j
else ;tIIEc
data[cur]=temp[i2++]; 0$dY;,Q.
} ='l6&3X
} GQc%OQc\
#7E&16Fk
} H6+st`{
y5opdIaT
改进后的归并排序: LnACce ?b
f<xt3
package org.rut.util.algorithm.support; @o-evH;G
~NJLS-
import org.rut.util.algorithm.SortUtil; hJtghG6v
kQ:>j.^e
/** E<.{ v\
* @author treeroot Yv|bUZ@
* @since 2006-2-2 _d"Y6 0
* @version 1.0 9#A{C!75(y
*/ )7BNzj"~
public class ImprovedMergeSort implements SortUtil.Sort { i\c^h;wX
]`+"o[
private static final int THRESHOLD = 10; ?2 O-EiWjZ
U S~JLJI
/* A UO0
* (non-Javadoc) 9cHNwgD>v
* d`rDEa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vt 5XC~jK
*/ m:o$|7r
public void sort(int[] data) { dIe 6:s
int[] temp=new int[data.length]; cVt$#A)
mergeSort(data,temp,0,data.length-1); -Z#]_C{Y-)
} .cnw?EI
8CHf.SXh
private void mergeSort(int[] data, int[] temp, int l, int r) { X$Qi[=L
int i, j, k; "\P~Re"EH
int mid = (l + r) / 2; Ffqn|}gb
if (l == r) vskM;
return; ?F:C!_
if ((mid - l) >= THRESHOLD) 6(RqR
mergeSort(data, temp, l, mid); n$VPh/
else enO=-#
insertSort(data, l, mid - l + 1); Vf* B1Zb
if ((r - mid) > THRESHOLD) d(cYtM,P
mergeSort(data, temp, mid + 1, r); )fcpE,g'
else [;\< 2=H
insertSort(data, mid + 1, r - mid); r4qV}-E
^*T{-U'
for (i = l; i <= mid; i++) { B=qRZA!DQ?
temp = data; AFnlt
} w+ )GM
for (j = 1; j <= r - mid; j++) { [}B{e=`!
temp[r - j + 1] = data[j + mid]; {`SGB;ho
} zj0pP{y
int a = temp[l]; ?>Ci`XlLr
int b = temp[r]; w2_I/s6B
for (i = l, j = r, k = l; k <= r; k++) { >5Rw~
if (a < b) { 3R96;d;
data[k] = temp[i++]; dXSb%ho
a = temp; 2T?1X{g
} else { Vam8NnZ|r
data[k] = temp[j--]; ErUk>V
b = temp[j]; .*..pf|/
} ?J1&,'&
} Le+8s LE`Y
} +]2~@=<@
G?X,Y\Lp
/** [}Yci:P_ +
* @param data j;c^pLUP
* @param l Q14;G<l-
* @param i I.0Usa"z
*/ q>h+Ke
private void insertSort(int[] data, int start, int len) { 1+[|pXT}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3B]+]e~
} Bc`A]U
} WN?`Od:y
} fpC@3itI
} [IX!3I[J]
{ca^yHgGy
堆排序： o".O#^3H%
~]s"PV:|
package org.rut.util.algorithm.support; s~'C'B?
|UiykQ
import org.rut.util.algorithm.SortUtil; :BiR6>1:
ymJw{&^am
/** Aba%Gh
* @author treeroot =Qq^=3@h
* @since 2006-2-2 N`:bvr
* @version 1.0 `'t;BXedz/
*/ bao5^t}
public class HeapSort implements SortUtil.Sort{ JHOBg{Wg
2:0Y'\nn
/* (non-Javadoc) G(,~{N||
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lAt1Mq}?P
*/ Ny<G2!W
public void sort(int[] data) { jtJ8r5j 1
MaxHeap h=new MaxHeap(); `Y$5g~3.
h.init(data); $6+P&"8
for(int i=0;i h.remove(); = nN*9HRD
System.arraycopy(h.queue,1,data,0,data.length); |xC TX
} X64I~*
vWga>IGM
private static class MaxHeap{ LU=)\U@Q
f*@:{2I.v
void init(int[] data){ Z1}zf(JU
this.queue=new int[data.length+1]; <W{0@?y
for(int i=0;i queue[++size]=data; "+Yn;9
fixUp(size); YR`rg;n#
} F#R\Ot,hv
} K8we*
soCHwiE
private int size=0; _ o3}Ly}
c.> (/
private int[] queue; fXQRsL8 ]
`cRB!w=KHV
public int get() { PA[Rhoit,
return queue[1]; L-TVe
} 'Z9F0l"Nr
Y3&ecEE
public void remove() { F'Vl\qPt
SortUtil.swap(queue,1,size--); sM_e_e
fixDown(1); U Bg_b?k
} *a.*Ha
file://fixdown kV<)>Gs
private void fixDown(int k) { )SLs [
int j; a VMFjkW
while ((j = k << 1) <= size) { n[-!Jp[
if (j < size %26amp;%26amp; queue[j] j++; &g {_.n,
if (queue[k]>queue[j]) file://不用交换 W.<<azi
break; _QCI<|A
SortUtil.swap(queue,j,k); (`*wiu+i
k = j; 0_.hU^fP
} tfQq3#
} |`/uS;O
private void fixUp(int k) { m^+~pC5
while (k > 1) { YtQWArX,
int j = k >> 1; N$b;8F
if (queue[j]>queue[k]) k,(_R=
break; 2"^9t1C2
SortUtil.swap(queue,j,k); g>CQO,s;w
k = j; %tLq&tyeY
} Jp0.h8i
} jXR+>=_
_J!mhUA
} (iP,YKG1?
_ RYZyw
} K@lV P!z
JR)rp3o-
SortUtil： xnOlV
[J Xrj{
package org.rut.util.algorithm; 9m!fW|4
B/}>UHM
import org.rut.util.algorithm.support.BubbleSort; 9\2&6H
import org.rut.util.algorithm.support.HeapSort; .@V>p6MV
import org.rut.util.algorithm.support.ImprovedMergeSort; B:.rp.1
import org.rut.util.algorithm.support.ImprovedQuickSort; aQFHB!
import org.rut.util.algorithm.support.InsertSort; z`SkKn0f Y
import org.rut.util.algorithm.support.MergeSort; j&5Xjl>4
import org.rut.util.algorithm.support.QuickSort; :Yqa[._AF
import org.rut.util.algorithm.support.SelectionSort; _Ohq'ZgXm
import org.rut.util.algorithm.support.ShellSort; r1]e:
2T9Z{v
/** vS#]RW&j
* @author treeroot :P~Owz
* @since 2006-2-2 7a net
* @version 1.0 ] fB{
*/ GAKJc\o
public class SortUtil { <rs]@J'p
public final static int INSERT = 1; !C?z$5g
public final static int BUBBLE = 2; (#qVtN`t
public final static int SELECTION = 3; NBX/V^
public final static int SHELL = 4; 70eN]OY
public final static int QUICK = 5; :Ib\v88WIv
public final static int IMPROVED_QUICK = 6; %|>i2
public final static int MERGE = 7; `314.a6S
public final static int IMPROVED_MERGE = 8; ,~#hHhR_
public final static int HEAP = 9; J)o%83//
,?+yu6eLb
public static void sort(int[] data) { `RRORzXoS
sort(data, IMPROVED_QUICK); P9vROzXK
} 3OlY Ml
private static String[] name={ .MlE1n'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rB]/N,R
}; u.6%n.g
FReK
private static Sort[] impl=new Sort[]{ T*m_rDDt
new InsertSort(), QTH yH
new BubbleSort(), ?%(*bRV -
new SelectionSort(), Pl4d(2 7
new ShellSort(), ;nE}%lT
new QuickSort(), ;]!
new ImprovedQuickSort(), }: e9\r)
new MergeSort(), l<+k[@Vox
new ImprovedMergeSort(), 3Daq5(fLP
new HeapSort() xmDwoLU
}; m`~ Qr~
??PpHBJ')
public static String toString(int algorithm){ it$~uP |
return name[algorithm-1]; 65v'/m!ys
} ~WSC6Bh@9
|wx1 [xZ
public static void sort(int[] data, int algorithm) { Qw:j2g2H7
impl[algorithm-1].sort(data); KMV!Hqkk
} O9Aooe4W=
\=)h6AG
public static interface Sort { r+Y1m\
public void sort(int[] data); uY,FugWbl
} x/~M=][tN
3-'|hb
public static void swap(int[] data, int i, int j) { gK /K Z8
int temp = data; `0D+x
data = data[j]; novZ<?7 5;
data[j] = temp; 6c:$[owC
} ?9:\1)]
} 0U'r ia:$