[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; H~JPsS;
} .q#2 op
int i1=l; T<kyxbjR
int i2=mid+1; bSsX)wHm
for(int cur=l;cur<=r;cur++){ !4 `any
if(i1==mid+1) I_N(e|s\U
data[cur]=temp[i2++]; ~E&drl\
else if(i2>r) s,>1n0a
data[cur]=temp[i1++]; '^"6EF.R
else if(temp[i1] data[cur]=temp[i1++]; ,9Y{x
else Ex^|[iV
data[cur]=temp[i2++]; G m40u/
} f@Mm{3&.
} !^BXai/
i3g;B?54
} (NrH)+)J!a
os*QWSs
改进后的归并排序: gK7j~.bb"
C*Avu
package org.rut.util.algorithm.support; ~jMdM~}
wZN<Og+;
import org.rut.util.algorithm.SortUtil; lSU&Yqx
~t\Hb8o
/** rf1Us2vp
* @author treeroot L/9f"%kZ
* @since 2006-2-2 yEL^Y'x?
* @version 1.0 R06q~>
*/ Qag@#!&n
public class ImprovedMergeSort implements SortUtil.Sort { OO5k_J
@*jd.a`
private static final int THRESHOLD = 10; `~Nd4EA)2
=;Gy"F1 dp
/* A;Rr#q<
* (non-Javadoc) oW3{&vfz
* E`%Ewt$Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^50#R<Ny
*/ }TD$!
public void sort(int[] data) { *X_CtjgF
int[] temp=new int[data.length]; :9!?${4R
mergeSort(data,temp,0,data.length-1); ]p>6r*/nw
} Hp;Dp!PLa
`vWFTv
private void mergeSort(int[] data, int[] temp, int l, int r) { i_T8Bfd:
int i, j, k; "2:]9j
int mid = (l + r) / 2; =BO} hk
if (l == r) p|VoIQY
return; >i=^Mh-bm
if ((mid - l) >= THRESHOLD) oyV@BHJO@
mergeSort(data, temp, l, mid); xgP/BK2"
else Z7?C^m
insertSort(data, l, mid - l + 1); 7Wub@Mp
if ((r - mid) > THRESHOLD) 6( TG/J
mergeSort(data, temp, mid + 1, r); <*u[<
else &scHyt
insertSort(data, mid + 1, r - mid); QZ(se
(5S(CYls
for (i = l; i <= mid; i++) { p\5DW'
temp = data; O@St^o*A}
} A`2l;MW
for (j = 1; j <= r - mid; j++) { ~9#[\/;"
temp[r - j + 1] = data[j + mid]; 9Cbf[\J!bq
} aLapb5VV
int a = temp[l]; JJlwzH
int b = temp[r]; ;7CE{/Bq.p
for (i = l, j = r, k = l; k <= r; k++) { D/C,Q|Ya6
if (a < b) { Z'iXuI49
data[k] = temp[i++]; Bgs3sM9
a = temp; }I_/>58
} else { `ZL~k
data[k] = temp[j--]; ;\yY*
b = temp[j]; > E;`;b
} R:HF~}
} A\J|eSG'$
} KsI[
((L=1]w
/** "1P8[
* @param data #:"F-3A0
* @param l 7+';&2M)n~
* @param i EJ&[I%jU
*/ X=]FVHV;
private void insertSort(int[] data, int start, int len) { )+T\LU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'P(S*sr
} Dlhb'*@
} f%ude@E3
} 2VaQxctk
} 0X =Yly*m@
& xOEp
堆排序： GQ~wx1jj1
q]+'{Ci@
package org.rut.util.algorithm.support; Ru8k2d$B
nE+OBdl
import org.rut.util.algorithm.SortUtil; .T0w2Dv/
Stqlp<xy
/** "i/ l'
* @author treeroot Oi#F
* @since 2006-2-2 2:0'fNXop
* @version 1.0 =jZ}@L/+
*/ z45 7/zO
public class HeapSort implements SortUtil.Sort{ :db:|=#T
k@r%>Ul@
/* (non-Javadoc) h3y0bV[g=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FWpcWmS`s
*/ ~_^#/BnAl
public void sort(int[] data) { F8{"Rk}
MaxHeap h=new MaxHeap(); L h"K"Uv
h.init(data); #T_m|LN7
for(int i=0;i h.remove(); hd*bPj;
System.arraycopy(h.queue,1,data,0,data.length); YSi[s*.G
} z/zUb``
n<47#-
private static class MaxHeap{ .|x\6 jf
y7J2:/@[x
void init(int[] data){ Hbz>D5$
this.queue=new int[data.length+1]; ^gx`@^su
for(int i=0;i queue[++size]=data; /7Z5_q_
fixUp(size); .*+?]
} 9Qja|;
} CD|)TXy
PMPB}-d
private int size=0; $|~YXH~O
f?)BAah
private int[] queue; y>}dKbCN
LJ7Qwh_",
public int get() { 3D<s#
return queue[1]; D{1k{/cF
} O_@
Qu4Bd|`(k
public void remove() { et[n;nl>V
SortUtil.swap(queue,1,size--); os/_ObPiX
fixDown(1); O3,IR1
} := OdjfhY
file://fixdown &~`Ay4hq
private void fixDown(int k) { [|{2&830
int j; _?]E)i'RI
while ((j = k << 1) <= size) { w7d(|`
if (j < size %26amp;%26amp; queue[j] j++; CMk0(sztU_
if (queue[k]>queue[j]) file://不用交换 Y"J' 'K
break; -58
SortUtil.swap(queue,j,k); Wp!#OY1?
k = j; xD[O8vQE
} nff X
} Kgev*xg
private void fixUp(int k) { 0< i]ph
while (k > 1) { ^&gu{kP
int j = k >> 1; d&mSoPf
if (queue[j]>queue[k]) " sh%8 <N
break; @lvvI<U
SortUtil.swap(queue,j,k); I9JiH,+
k = j; o/Z
} ?"oW1a\
} ;2lKo="
f0UB? |
} l)@Zuh
lP$bxUNt
} fB.xjp?
~zdHJ8tYp
SortUtil： 9='a9\((mH
a:$hK%^ \
package org.rut.util.algorithm; x4@v$phyH
d1MY>zq
import org.rut.util.algorithm.support.BubbleSort; Z/#l~.o[
import org.rut.util.algorithm.support.HeapSort; )a:j_jy
import org.rut.util.algorithm.support.ImprovedMergeSort; $#|iKi<Y@j
import org.rut.util.algorithm.support.ImprovedQuickSort; U;%I" p`Z/
import org.rut.util.algorithm.support.InsertSort; 8WT^ES~C
import org.rut.util.algorithm.support.MergeSort; or2BG&W
import org.rut.util.algorithm.support.QuickSort; X~ca8!Dq
import org.rut.util.algorithm.support.SelectionSort; 6|#+
import org.rut.util.algorithm.support.ShellSort; f+*wDH
tl.I:A5L
/** $nX4!X
* @author treeroot $F> #1:=v<
* @since 2006-2-2 _," -25a
* @version 1.0 cE}y~2cH
*/ ]xJ5}/
public class SortUtil { :)/%*<vq,
public final static int INSERT = 1; ~hYTs
public final static int BUBBLE = 2; 8^/V2;~^,>
public final static int SELECTION = 3; mc{gcZIm
public final static int SHELL = 4; >GRL5Iow
public final static int QUICK = 5; e+Qq a4
public final static int IMPROVED_QUICK = 6; '3B\I#
public final static int MERGE = 7; cY&SKV#
public final static int IMPROVED_MERGE = 8; /{|<3CEe
public final static int HEAP = 9; EvA{@g4>
\SA"DT
public static void sort(int[] data) { ,{4G@:Fm
sort(data, IMPROVED_QUICK); ] T`6Hz!
} JPeZZ13sS
private static String[] name={ \2$-.npz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h( lkC[a&
}; p8yn? ~]^
EVovx7dr
private static Sort[] impl=new Sort[]{ !uIT5D
new InsertSort(), DyZe+,g;S
new BubbleSort(), l# -4}95
new SelectionSort(), j,7NLb9M
new ShellSort(), Rg4'9I%B
new QuickSort(), .23z\M8 -
new ImprovedQuickSort(), M\%LB}4M
new MergeSort(), o: \&4z&=
new ImprovedMergeSort(), al{;]>W
new HeapSort() V1aWVLltj
}; TDvUiJm
41\r7 BS
public static String toString(int algorithm){ m6V:x/'=
return name[algorithm-1]; +kh#Jq.
} #X~{p4Lr
FbvwzZ
public static void sort(int[] data, int algorithm) { S1_X@[t
impl[algorithm-1].sort(data); xR9<I:^&
} NF/@'QRT
^F5Q(A
public static interface Sort { #Y)Gos
public void sort(int[] data); Z^Y_+)=s
} +4[L_
a(!_3i@
public static void swap(int[] data, int i, int j) { S4n~wo
int temp = data; %}t<,ex(yO
data = data[j]; -}2'P)Xp
data[j] = temp; f7y a0%N
} 0RaE!4)!;
} dE0 `tX