[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; ["5Z=4
} k]J!E-yI8
int i1=l; QfLDyJv`e
int i2=mid+1; &4g]#A>@
for(int cur=l;cur<=r;cur++){ R-lB.9e#M
if(i1==mid+1) H.sYy-_]F
data[cur]=temp[i2++]; :o!bz>T
else if(i2>r) C~C}b
data[cur]=temp[i1++]; ]QB<N|ps
else if(temp[i1] data[cur]=temp[i1++]; (eTe`
else VBHDI{HzRv
data[cur]=temp[i2++]; v%mAU3M
} ze%kP#c6!
} x3X^\Ig
RTHe#`t
} %Se@8d8
AOh\%|}
改进后的归并排序: v0~'`*|&
:n1^Xw0q
package org.rut.util.algorithm.support; ?Hb5<,1u3
p&Os5zw;|
import org.rut.util.algorithm.SortUtil; jzRfD3_s
fgmu*\x<
/** Fpz)@0K;
* @author treeroot Equj[yw%@
* @since 2006-2-2 /h)_Q;35S;
* @version 1.0 }Mh@%2$
*/ jacp':T
public class ImprovedMergeSort implements SortUtil.Sort { _;o)MTw|'
ccLTA
private static final int THRESHOLD = 10; O$'BJKj-4
dNQR<v\IL
/* (k{rn3,
* (non-Javadoc) D..dGh.MY
* sTn}:A6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v() wngn
*/ z_)`='&n
public void sort(int[] data) { AFd3_>h
int[] temp=new int[data.length]; Ch3{q/-g
mergeSort(data,temp,0,data.length-1); jgcI|?yL
} \v7->Sy8
.@#GNZe
private void mergeSort(int[] data, int[] temp, int l, int r) { %Tc P[<
int i, j, k; Td7f
int mid = (l + r) / 2; [M:ag_rm+f
if (l == r) Z0Tpz2m
return; ~EYsUC#B_
if ((mid - l) >= THRESHOLD) >";I3S-t
mergeSort(data, temp, l, mid); o09)esy
else \O*8%
insertSort(data, l, mid - l + 1); 3Kv~lo^
if ((r - mid) > THRESHOLD) hKZ<PwBi
mergeSort(data, temp, mid + 1, r); Bh'_@PHP
else !=C74$TH
insertSort(data, mid + 1, r - mid); 3#=%2\
wt8?@lJ"/
for (i = l; i <= mid; i++) { q9cN2|:
temp = data; \Vc-W|e
} @ m' zm:
for (j = 1; j <= r - mid; j++) { xJ2DkZ
temp[r - j + 1] = data[j + mid]; z0@{5e$#Y
} oWJ0>)
int a = temp[l]; ,Z2fVz~9
int b = temp[r]; k&|#(1CFY
for (i = l, j = r, k = l; k <= r; k++) { GFq,Ca~
if (a < b) { oxs0)B
data[k] = temp[i++]; _$&C$q$1y
a = temp; T^"-;
} else { 6c[&[L%
data[k] = temp[j--]; ~,*=j~#h
b = temp[j]; gpIq4Q<
} .u+ZrA#
} hkifd4#
} `R9}.?7
q+KGQ*
/** TSgfIE|
* @param data <BUKTRq
* @param l ;9WS#>o
* @param i Yqpe2II7
*/ n54}WGo>9
private void insertSort(int[] data, int start, int len) { e`N/3q7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GmjTxNU@
} ws^ 7J/8
} NCid`a$
} il=:T\'U9
} E46+B2_~zk
JO|%Vpco
堆排序： xI'sprNa_1
DlD;rL=
package org.rut.util.algorithm.support; m2i'$^a#
iSiez'
import org.rut.util.algorithm.SortUtil; _4Ciai2Ql
c.<bz
/** l r16*2.
* @author treeroot G_5uO58
* @since 2006-2-2 ^lI>&I&1
* @version 1.0 }K rQPg
*/ ,Q7W))j
public class HeapSort implements SortUtil.Sort{ 5a0&LNm
X(YR).a~
/* (non-Javadoc) cft'%IEs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >Y3ZK{b
*/ &8w MGahp
public void sort(int[] data) { j'2:z#
MaxHeap h=new MaxHeap(); vVA)x~^
h.init(data); :n%KHen3\
for(int i=0;i h.remove(); a 8(mU%
System.arraycopy(h.queue,1,data,0,data.length); +NM`y=@@
} 3Z taj^v
u0s25JY.%
private static class MaxHeap{ KtR*/<7IC
<i!:{'%
void init(int[] data){ MBjo9P(
this.queue=new int[data.length+1]; T@{}!
for(int i=0;i queue[++size]=data; y)Y0SY1\j
fixUp(size); q'% cVM
} 8<2 [ F
} $G,#nh2 oD
Ub"6OT1tl
private int size=0; UP+4xG
4^OPzg6Z%p
private int[] queue; bvR0?xnq
{&I3qk2(
public int get() { 6 _Cc+}W
return queue[1]; dXBXV>rbB
} t>Ot)d
4:50dj
public void remove() { n/zTS3<
SortUtil.swap(queue,1,size--); UHaY|I${U
fixDown(1); mO?yrM *
} saPg2N,
file://fixdown f^vz
private void fixDown(int k) { Bh%Yu*.f
int j; ah8xiABa
while ((j = k << 1) <= size) { d i;Fj
if (j < size %26amp;%26amp; queue[j] j++; Ok*aP+Wq
if (queue[k]>queue[j]) file://不用交换 u3VSS4RG%
break; d[t+iBP;)
SortUtil.swap(queue,j,k); xGBp+j1H
k = j; vgyv~Px]AW
} +eIX{J\s
} $Fr>'H+i
private void fixUp(int k) { sX,."@[
while (k > 1) { DV6B_A{kI
int j = k >> 1; S0zk<S
if (queue[j]>queue[k]) v ?OIK=Xm
break; p10i_<J]=
SortUtil.swap(queue,j,k); ]Av)N6$&-Z
k = j; C8oAl3d+h
} =Felo8+
} iN]#XIQ%
b-Uy&+:X*d
} |s}7<A
`%5~>vPS
} X1N*}@:/
c_RAtM<n
SortUtil： @/yQ4Gr
BQ /0z^A
package org.rut.util.algorithm; Y \oz9tf8
PDQ\ND
import org.rut.util.algorithm.support.BubbleSort; 920 o]Dh=t
import org.rut.util.algorithm.support.HeapSort; {i!@C(M3
import org.rut.util.algorithm.support.ImprovedMergeSort; %aHQIoxg
import org.rut.util.algorithm.support.ImprovedQuickSort; xUw)mUn@N
import org.rut.util.algorithm.support.InsertSort; -Y:^<C^^&8
import org.rut.util.algorithm.support.MergeSort; VW%eB
import org.rut.util.algorithm.support.QuickSort; &1(PS)s
import org.rut.util.algorithm.support.SelectionSort; E$?:^ausu
import org.rut.util.algorithm.support.ShellSort; N Dg*8i
\ld{Z;e
/** C3#mmiL-
* @author treeroot qe@ctHpn
* @since 2006-2-2 7G 3*@cl
* @version 1.0 y wf@G; fK
*/ rO;Vr},3\%
public class SortUtil { +j">Ju6Q;.
public final static int INSERT = 1; ~4t7Q
public final static int BUBBLE = 2; JIYZ
public final static int SELECTION = 3; ?A\[EI^
public final static int SHELL = 4; O.+02C_*
public final static int QUICK = 5; \y\@=j
public final static int IMPROVED_QUICK = 6; 6.>l
public final static int MERGE = 7; F%s'R 0l
public final static int IMPROVED_MERGE = 8; q<2b,w==
public final static int HEAP = 9; YH .+(tNv
YYzl"<)c
public static void sort(int[] data) { dK^WZQ
sort(data, IMPROVED_QUICK); z}sBx9;
} 8`4Z%;1
private static String[] name={ 8<w8"B.i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A@HCd&h
}; ]"DsZI-glW
7z@Jw
private static Sort[] impl=new Sort[]{ E#I^D/0
new InsertSort(), <lxE^M
new BubbleSort(), c7[+gc5}
new SelectionSort(), JS:AHJSz
new ShellSort(), ^XbN&'^,HL
new QuickSort(), l^"HcP6
new ImprovedQuickSort(), 99]&Xj
new MergeSort(), CKau\N7T
new ImprovedMergeSort(), k5X& |L/
new HeapSort() rERHfr`OU
}; ySXQn#}-,
!U?Z<zh
public static String toString(int algorithm){ OY?x'h
return name[algorithm-1]; ]!=,8dY
} D$W09ng-
tc2e)WZP
public static void sort(int[] data, int algorithm) { N*CcJp{Q
impl[algorithm-1].sort(data); N7WQ{/PSG
} nYF;.k
)vcyoq
public static interface Sort { tI-u@ g
public void sort(int[] data); re-;s
} ^vQ,t*Uj=
}1)tALA
public static void swap(int[] data, int i, int j) { *>%tx k:)
int temp = data; O,+ZD^
data = data[j]; ?~_[/
data[j] = temp; }wkZ\q[
} @$bEY#*C
} [ {|868