[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; lnk`D(>W
} boJ
int i1=l; l12_&o"C~
int i2=mid+1; 9$u'2TV
for(int cur=l;cur<=r;cur++){ g5 J[ut
if(i1==mid+1) z"@yE*6
data[cur]=temp[i2++]; 9svnB@
else if(i2>r) y.l`NTT]<
data[cur]=temp[i1++]; 5g{F-
else if(temp[i1] data[cur]=temp[i1++]; K2u$1OKv
else t'@qb~sf
data[cur]=temp[i2++]; !u0qF!/W
} VQQtxHTC3
} $]Vvu{
dBKceL v
} ;%j1'VI
^\z.E?v%
改进后的归并排序: <{"]&bl
El}."}l&
package org.rut.util.algorithm.support; ,(6U3W*bu
l<]@5"wN
import org.rut.util.algorithm.SortUtil; 9,4Lb]
JIl<4 %A
/** *hP9d;-Ar
* @author treeroot %$)[qa3
* @since 2006-2-2 c<`Z[EY(t
* @version 1.0 -Tw96 dv
*/ #Tjv(O[&
public class ImprovedMergeSort implements SortUtil.Sort { -xc*R%k
B|~tW21
private static final int THRESHOLD = 10; ;!JI$_-\
S-^RZ"
/* i9qn_/<c
* (non-Javadoc) =-r[ s%t&
* &3SQVOW ~T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8e`'Ox_5a
*/ {PXN$p:'
public void sort(int[] data) { GtCbzNY
int[] temp=new int[data.length]; l 4zl|6%
mergeSort(data,temp,0,data.length-1); \m3;<A/3n
} L@"1d.k_
Yy$GfjJtL]
private void mergeSort(int[] data, int[] temp, int l, int r) { Vd-\_VP20
int i, j, k; dQ5_=(9
int mid = (l + r) / 2; }E\ b_.
if (l == r) p@H3NX
return; vakAl;
if ((mid - l) >= THRESHOLD) $\0%"S
mergeSort(data, temp, l, mid); dc.oK4G}
else :Kl~hzVSOa
insertSort(data, l, mid - l + 1); JP2zom
if ((r - mid) > THRESHOLD) |6%B2I&c
mergeSort(data, temp, mid + 1, r); 'Y ZYRFWXM
else FY^[?lj
insertSort(data, mid + 1, r - mid); WW'8&:x
h@5mVTb}i
for (i = l; i <= mid; i++) { TsPx"+>7`
temp = data; bOt6q/f
} 1<y|,
for (j = 1; j <= r - mid; j++) { eVobs2s
temp[r - j + 1] = data[j + mid]; C6=P(%y
} _Ra$"j
int a = temp[l]; Vt {uG
int b = temp[r]; 'w?*4H
for (i = l, j = r, k = l; k <= r; k++) { _%M5 T
if (a < b) { 7fVlA"x
data[k] = temp[i++]; hP=^JH
a = temp; _&Hq`KJm
} else { E^:8Jehq
data[k] = temp[j--]; 7r`A6 \ !
b = temp[j]; D;pfogK @
} na;U]IK
} v&hQ;v
} YceX)
h}X^
/** ? 1OZEzA!
* @param data {9tKq--@E9
* @param l 2;Ij~~
* @param i 2VrO8q(
*/ 7q>Y)*V
private void insertSort(int[] data, int start, int len) { Xndgs}zz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mVg$z
} Hh_Yd)
} d-=RS]j;j
} wj-=#gyAoo
} }9&Z#1/
y"Fp4$qb
堆排序： V &K:~[M
#1INOR9
package org.rut.util.algorithm.support; 5B&#Sh`r
dM%#DN8l
import org.rut.util.algorithm.SortUtil; 3D)gy9T&l
7oj ^(R,
/** G:W4<w
* @author treeroot u&q RK>wLa
* @since 2006-2-2 .?L&k|wX-
* @version 1.0 HN/ %(y
*/ v"y0D
public class HeapSort implements SortUtil.Sort{ e)pQh&uD
C+,JLK
/* (non-Javadoc) E?{{z4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }:5_vH0
*/ hJrcy!P<a
public void sort(int[] data) { cQ= "3M)~r
MaxHeap h=new MaxHeap(); s*"Yi~
h.init(data); 4fK(<2i
for(int i=0;i h.remove(); > 3<P^-9L
System.arraycopy(h.queue,1,data,0,data.length); ,/d R
} CdxEY
4eZ
private static class MaxHeap{ &d"c6il[
X2X.&^
void init(int[] data){ 5H (CP
this.queue=new int[data.length+1]; dKs^Dq
for(int i=0;i queue[++size]=data; C$9+p@G6
fixUp(size); 9ANC,+0p
} aq'dC=y
} hxIG0d!o
8db J'
private int size=0; @8IYJ{=
$$UMc-Pq
private int[] queue; Who7{|M\'
\E9Hk{V:6
public int get() { +Dg%ec
return queue[1]; XCQS_'D
} 0*G5Vd
!1i(6?~#4
public void remove() { 9}~WwmC|x
SortUtil.swap(queue,1,size--); @x9DV{j)V
fixDown(1); N|Cx";,|FZ
} eBZa9X$
file://fixdown cY%[UK$l
private void fixDown(int k) { c\X0*GX
int j; Jr0D:
while ((j = k << 1) <= size) { *?;<buJb?
if (j < size %26amp;%26amp; queue[j] j++; OYcf+p"<\
if (queue[k]>queue[j]) file://不用交换 JfJUOaL
break; L@ ,-V
SortUtil.swap(queue,j,k); fZoV\a6Kj
k = j; Dj=OUo[[d
} 2h<{~;
} .rfufx9Sw
private void fixUp(int k) { ',?9\xEB
while (k > 1) { Q o}&2m
int j = k >> 1; e-$U .cx
if (queue[j]>queue[k]) %+PWcCmn
break; J. ]~J|K
SortUtil.swap(queue,j,k); :K%{?y
k = j; ]1A"l!yf
} 'b#`)w@/=
} 6`sOhVD
K<@gU\-!
} #St=%!
;aZ$qgN*Y
} ,@+7(W
MQL1/>j;
SortUtil： ,2Y PD4
fz%I'+!
package org.rut.util.algorithm; E)eRi"a46
'4gi*8Y
import org.rut.util.algorithm.support.BubbleSort; YkRv~bc1]
import org.rut.util.algorithm.support.HeapSort; }E=:k&IDPB
import org.rut.util.algorithm.support.ImprovedMergeSort; >Ab>"!/'K
import org.rut.util.algorithm.support.ImprovedQuickSort; DqgYc[UGA
import org.rut.util.algorithm.support.InsertSort; yo)a_rY
import org.rut.util.algorithm.support.MergeSort; Of)EBa<5^
import org.rut.util.algorithm.support.QuickSort; v 4@=>L
import org.rut.util.algorithm.support.SelectionSort; 1<hj3
import org.rut.util.algorithm.support.ShellSort; s?;rP,{:p
b9M.p*!
/** 2o0.ttBAqZ
* @author treeroot 0\G`AO;D
* @since 2006-2-2 kcy?;b;z
* @version 1.0 &^ECQ
*/ X[L6Av
public class SortUtil { ]~my<3j}or
public final static int INSERT = 1; gu+c7qe
public final static int BUBBLE = 2; =NyN.^bwT
public final static int SELECTION = 3; uzf@49m]m
public final static int SHELL = 4; g8 (zvG;Y
public final static int QUICK = 5; -4P2 2
public final static int IMPROVED_QUICK = 6; L2s)B
public final static int MERGE = 7; 1}#(4tw)
public final static int IMPROVED_MERGE = 8; cswX?MN
public final static int HEAP = 9; FhJ8}at+e
l26DPtWi
public static void sort(int[] data) { jM%qv
sort(data, IMPROVED_QUICK); Cm:&n|
} lO482l_t
private static String[] name={ ,vBi)H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SK2nxZOH
}; TNs0^h)
[@Hv,
private static Sort[] impl=new Sort[]{ auOYi<<>W
new InsertSort(), VKtrSY}6T
new BubbleSort(), 8'=8!V
new SelectionSort(), >n,RBl
new ShellSort(), 5#~ARk*?a
new QuickSort(), SB#YV
new ImprovedQuickSort(), 0- GA,I_
new MergeSort(), PV?XpT
new ImprovedMergeSort(), :tP:X+?O
new HeapSort() %N\pfZ2\
}; !"u) `I2
Nrl&"IK|J
public static String toString(int algorithm){ <v<TsEI
return name[algorithm-1]; nQ\ +Za==
} lQs|B '
bP;cDQ(g
public static void sort(int[] data, int algorithm) { 8i!~w 7z
impl[algorithm-1].sort(data); uq;,h46ki
} zh5{t0E}C
76[O3%
public static interface Sort { 9XGzQ45R
public void sort(int[] data); F{*S}&q*)o
} 'L#qR)t
du2q6"
public static void swap(int[] data, int i, int j) { iqecm]Z0
int temp = data; (5@9j
data = data[j]; 8+Lig
data[j] = temp; 5TlPs_o
} .Z=D|&!
} WeGT}