[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; G:'-|h
} R\yw9!ESd
int i1=l; ms3Ec`i9
int i2=mid+1; &&[j/d}J
for(int cur=l;cur<=r;cur++){ q{c6DCc]\
if(i1==mid+1) %@*diJ
data[cur]=temp[i2++]; hdN3r{
else if(i2>r) yA(H=L-=!1
data[cur]=temp[i1++]; f&^K>Jt1@#
else if(temp[i1] data[cur]=temp[i1++]; &nj@t>5Bs$
else $|z8WCJ
data[cur]=temp[i2++]; =bf-+gZD
} qX:54$t
} g<KBsz!{
Czb@:l%sc
} E](Ood
w0moC9#$?
改进后的归并排序: 1h]Dc(Oc#=
"xS",6Sy
package org.rut.util.algorithm.support; \I#2Mq?
LtH;#Q
import org.rut.util.algorithm.SortUtil; XXmtpM8
;wDcYs
/** ^`=Z=C$fj
* @author treeroot yXrFH@3
* @since 2006-2-2 H@__%KBw
* @version 1.0 ^']xkS
*/ rtf>\j+
public class ImprovedMergeSort implements SortUtil.Sort { :?jOts>uP
suPQlU>2sj
private static final int THRESHOLD = 10; Qo)>i0
^5u}
/* sh}=#eb
* (non-Javadoc) kYxn5+~
* -YHlVz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D4n~2]
*/ ]Rnr>_>x;
public void sort(int[] data) { |;{wy
int[] temp=new int[data.length]; .'+Tnu(5q
mergeSort(data,temp,0,data.length-1); &OGY?[n
} v.\1-Q?
hV'JTU]H
private void mergeSort(int[] data, int[] temp, int l, int r) { wC<!,tB(8
int i, j, k; v2JC{XqrI
int mid = (l + r) / 2; "=9L7.E)
if (l == r) -UPdgZ_Vxz
return; OyZgg(iN
if ((mid - l) >= THRESHOLD) R S;r
mergeSort(data, temp, l, mid); .\{GU9|nO
else hXbb+j
insertSort(data, l, mid - l + 1); gjvKrg
if ((r - mid) > THRESHOLD) vlm&)DIt
mergeSort(data, temp, mid + 1, r); "-A@>*g
else RjSVa.x
insertSort(data, mid + 1, r - mid); #<4h Y7/
*Yl9%x]3c
for (i = l; i <= mid; i++) { XLg6?Nu
temp = data; _hAp@? M
} OPBnU@=R
for (j = 1; j <= r - mid; j++) { q%Obrk
temp[r - j + 1] = data[j + mid]; M<~z=B#
} ,t5Ku)eNm
int a = temp[l]; J03yFT,dF
int b = temp[r]; yXR$MT+~
for (i = l, j = r, k = l; k <= r; k++) { ^C_Y[i ~|
if (a < b) { cm6cW(x6
data[k] = temp[i++]; y!mjZR,&
a = temp; Y%|f<C)lx2
} else { #r#UO
data[k] = temp[j--]; (6>8Dt 9[
b = temp[j]; sR+=<u1
} :=T+sT~
} &JtK<g
} -+#\WB{AI
<8+.v6DCd
/** C:0Ra^i ?L
* @param data p_)V@7
* @param l +VI2i~
* @param i vv"_u=H
*/ #l+U(zH:JG
private void insertSort(int[] data, int start, int len) { ,g6w2y7 ]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /b@8#px
} k^S=i_ U
} bh3}[O,L A
} u! x9O8y
} +i4S^B/8i
}O<=!^Y;A
堆排序： %mt|Dl
3!,XR\`[
package org.rut.util.algorithm.support; }R;.~F
3/@7$nV
import org.rut.util.algorithm.SortUtil; bQrH8)
]j~V01p/e
/** 5|9,S
* @author treeroot *y='0)[BD
* @since 2006-2-2 b{b2L.
* @version 1.0 O!\P]W4r$
*/ 25::z9i
public class HeapSort implements SortUtil.Sort{ tl (2=\
KArR.o }
/* (non-Javadoc) _K_!(]t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QDF1$,s4i
*/ .]k+hc`
public void sort(int[] data) { i"r&CS)sT
MaxHeap h=new MaxHeap(); cX> a>U
h.init(data); |Eu_K`
for(int i=0;i h.remove(); 0V1)ou84'
System.arraycopy(h.queue,1,data,0,data.length); xw&[ 9}Y
} [YpSmEn}Y
?76Wg::
private static class MaxHeap{ *[wy- fu
cWA9n}Z
void init(int[] data){ ]Vln5U
this.queue=new int[data.length+1]; \&NpVH,-
for(int i=0;i queue[++size]=data; .a8N 5{`
fixUp(size); J3Qv|w[3Y
} F@& R"-
} p&>*bF,
\A6MVMF8
private int size=0; q?nXhUD
o )G'._
private int[] queue; kn^RS1m
+%OINMo.A
public int get() { O={4 >>F
return queue[1]; k?;A#L~
} JN .\{ Y
+?w 7Nm`
public void remove() { j\B]>PP5
SortUtil.swap(queue,1,size--); osoreo;V^
fixDown(1); d(3F:dbk
} &na#ES$X,
file://fixdown [2pp)wq
private void fixDown(int k) { GvF8S MO[x
int j; wZJpSkcEx
while ((j = k << 1) <= size) { 9z$]hl
if (j < size %26amp;%26amp; queue[j] j++; : ^F+mQN
if (queue[k]>queue[j]) file://不用交换 GpMKOjVm|
break; o]t6u .L
SortUtil.swap(queue,j,k); HgvgO\`]
k = j; 0&mo1 k_U
} @zL)R b%P$
} ! @{rkp
private void fixUp(int k) { r Lg(J|^
while (k > 1) { vIF=kKl9,
int j = k >> 1; Sf);j0G,D
if (queue[j]>queue[k]) )@09Y_9r
break; X^r5su?
SortUtil.swap(queue,j,k); \V /s
k = j; SpPG
} an_qE}P
} Jkzt=6WZ0
X6kB R
} ]( V+ qj
[R+zzl&Zw
} r(y1^S9!8
!C *%,Ak
SortUtil： 8/,m8UOY
RrSSAoz1
package org.rut.util.algorithm; dIQ7u
XKp.]c wP
import org.rut.util.algorithm.support.BubbleSort; 5cO}Jp%PA
import org.rut.util.algorithm.support.HeapSort; @kvgq 0ab
import org.rut.util.algorithm.support.ImprovedMergeSort; $#2ik~]>
import org.rut.util.algorithm.support.ImprovedQuickSort; .;yy= Rj
import org.rut.util.algorithm.support.InsertSort; QWH1xId
import org.rut.util.algorithm.support.MergeSort; O<Qa1Ow7f
import org.rut.util.algorithm.support.QuickSort; 7?-eR-
import org.rut.util.algorithm.support.SelectionSort; )z&0 g2Am
import org.rut.util.algorithm.support.ShellSort; (JH LWAH
5LbU'5
/** !sQ$a#Ea
* @author treeroot )SQ*"X4"
* @since 2006-2-2 ?BT\)@h
* @version 1.0 L+LxS|S+M
*/ Vc.A<(
public class SortUtil { Sj]k5(&
public final static int INSERT = 1; pJrc\`D
public final static int BUBBLE = 2; z~Ph=1O>p
public final static int SELECTION = 3; [t*m$0[:
public final static int SHELL = 4; L]hXAShmb
public final static int QUICK = 5; @[u!
public final static int IMPROVED_QUICK = 6; <h^'x7PkW5
public final static int MERGE = 7; VgtWT`F.I
public final static int IMPROVED_MERGE = 8; 1@q~(1-o
public final static int HEAP = 9; vCyvy^s-I
R$'4 d
public static void sort(int[] data) { m^rgzx19?
sort(data, IMPROVED_QUICK); Y:[WwX|
} Ja>UcE29
private static String[] name={ cN0|! nm*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1|bu0d\]
}; eZ5UR014
"~Twx]Z
private static Sort[] impl=new Sort[]{ jY EB`&
new InsertSort(), DnvJx!#R
new BubbleSort(), DE|r~TQ
new SelectionSort(), aDFu!PLB{)
new ShellSort(), 3t22KY[`
new QuickSort(), |7n&I`#
new ImprovedQuickSort(), 2 *IF
new MergeSort(), AN7WMX
new ImprovedMergeSort(), OLJb8kO
new HeapSort() $C0NvJf
}; sUN>uroi !
_+g5;S5
public static String toString(int algorithm){ "'h?O*V]u{
return name[algorithm-1]; $gT+Ue|7
} jXvGL
p.^mOkpt
public static void sort(int[] data, int algorithm) { Z m9 e|J
impl[algorithm-1].sort(data); :LBG6J
} lS]<~
$3S6{"
public static interface Sort { j89|hG)2
public void sort(int[] data); ?#!Hm`\.
} kKVd4B[#*
%[\: 8
public static void swap(int[] data, int i, int j) { [H;HrwM s)
int temp = data; JIvVbI
data = data[j]; 3dfG_a61y
data[j] = temp; -Bbg'=QZa
} t5mI)u
} vK6YU9W~J