[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; qD(fYOX{C
} rysP)e
int i1=l; )e|$K= D
int i2=mid+1; [GR|$/(z=
for(int cur=l;cur<=r;cur++){ FtFv<UV
if(i1==mid+1) C`NBHRa>
data[cur]=temp[i2++]; s`Yu"s 8}4
else if(i2>r) iJ`%yg,
data[cur]=temp[i1++]; v7o?GQ75
else if(temp[i1] data[cur]=temp[i1++]; I 9{40_
else A;fB6
data[cur]=temp[i2++]; ;!l*7}5X=
} #gX%X~w$F
} vz;7} Zj]
A*\o c
} tA! M
IS,zy+w
改进后的归并排序: DnNt@e2|
j}rgOz.
package org.rut.util.algorithm.support; OX)#F'Sl}
<pTQpU
import org.rut.util.algorithm.SortUtil; er["NSo
~^lH ^J
/** 4i_spF-3
* @author treeroot MiSja#"+A
* @since 2006-2-2 6[+\CS7Lt
* @version 1.0 <CZI7]PM7
*/ 5T$}Oy1
public class ImprovedMergeSort implements SortUtil.Sort { saGRP}7?
-TzI>Fz
private static final int THRESHOLD = 10; N{1.gS
)myf)"l5
/* l-<3{!
* (non-Javadoc) !dfS|BA]
* !Qv5"_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yxaT7Oqh%
*/ C6K|:IK{
public void sort(int[] data) { b4Ricm
int[] temp=new int[data.length]; 6WA|'|}=
mergeSort(data,temp,0,data.length-1); F^.om2V|9
} ki;!WhF~
4*0:bhhhf_
private void mergeSort(int[] data, int[] temp, int l, int r) { "XGD:>Q.
int i, j, k; vnz[w=U
int mid = (l + r) / 2; TpJg-F
if (l == r) |rr$U
return; snXB`UC
if ((mid - l) >= THRESHOLD) 5z1\#" B[
mergeSort(data, temp, l, mid); ~A8qeaP
else q%OcLZ<,
insertSort(data, l, mid - l + 1); - *:p.(c
if ((r - mid) > THRESHOLD) 5~@?>)TBv
mergeSort(data, temp, mid + 1, r); %/UV_@x&
else [3t0M5x w
insertSort(data, mid + 1, r - mid); Dh hG$
'8s>rH5[V
for (i = l; i <= mid; i++) { +mJ :PAy4
temp = data; XMt u"K
} bH'S.RWp=
for (j = 1; j <= r - mid; j++) { ?r{TOjn
temp[r - j + 1] = data[j + mid]; XOu+&wOu
} CTl(_g
int a = temp[l]; 7V~ "x&Eu
int b = temp[r]; n11LxGwk
for (i = l, j = r, k = l; k <= r; k++) { 8h*t55
if (a < b) { E)C.eW /
data[k] = temp[i++]; Of-C
a = temp; 8<YX7e
} else { #$LH2?)
data[k] = temp[j--]; A5sf
b = temp[j]; 9wAA. -"
} "Z;~Y=hC13
} J6*f Uh
} q}#iV$dAj
|:./hdcad
/** Xl#Dw bx
* @param data Wu4ot0SZ
* @param l Ba/RO36&c
* @param i 6XdWm
*/ bRWIDPh
private void insertSort(int[] data, int start, int len) { 8V6=i'GK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X6Un;UL
} uCw>}3
} RG&I\DTyt
} }-d)ms!
} `&7mHa61
#":: '?,
堆排序： -7k[Vg?
DeH0k[o
package org.rut.util.algorithm.support; 8h@q
},rav]
import org.rut.util.algorithm.SortUtil; 3FFaEl
(@+h5@J[`I
/** Ffnk1/Zy
* @author treeroot CK2B
* @since 2006-2-2 y>$1UwQ
* @version 1.0 B1E$v(P3M
*/ '0Lov]L
public class HeapSort implements SortUtil.Sort{ BYS lKTh
P^"R4T
/* (non-Javadoc) M~als3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H#+\nT2m
*/ jk )Vb
public void sort(int[] data) { 3S5^`Ag#
MaxHeap h=new MaxHeap(); GMz8B-vk
h.init(data); eI^gV'UK
for(int i=0;i h.remove(); cA<<&C
System.arraycopy(h.queue,1,data,0,data.length); H#35@HF*o
} 3 -tO;GKb
:V-k'hm &
private static class MaxHeap{ 69Nw/$
.l\r9I(
void init(int[] data){ hd5$yU5JQ
this.queue=new int[data.length+1]; IhE9snJ[
for(int i=0;i queue[++size]=data; (VyA6a8
fixUp(size); T'.[F
} rIVvO
} )Ob]T{GY
X'f)7RbT
private int size=0; \b$<J.3
5X0QxnnV
private int[] queue; W"Z#Fs{n8
1SUzzlRx
public int get() { ll%G!VR
return queue[1]; :N2E}hxk
} P[FV2R~
jJia.#.Ze
public void remove() { qz`rL#W]
SortUtil.swap(queue,1,size--); ZYa\"zp-
fixDown(1); G=|70pxU
} :k~dj C
file://fixdown :=9<
private void fixDown(int k) { tw<P)V\h
int j; /g@^H/DO
while ((j = k << 1) <= size) { Wwhgo.Wx
if (j < size %26amp;%26amp; queue[j] j++; G6V/SaD
if (queue[k]>queue[j]) file://不用交换 V.8%|-d
break; vM(Xip7
SortUtil.swap(queue,j,k); 3rNc1\a;
k = j; Yl~$V(
} "]#'QuR
} ul@3 Bt
private void fixUp(int k) { I^G^J M!
while (k > 1) { UW6VHA>
int j = k >> 1; 26.)Ur<F
if (queue[j]>queue[k]) &tj0M.-
break; 'w.}2(
SortUtil.swap(queue,j,k); ,hWcytzEw
k = j; =IZ[_ /@
} RBE7485
} 4&{!M _
&s8<6P7
} #byJqy&e
?v4E<iXs
} K(VW%hV1
d2~l4IL)~
SortUtil： _R^y\1Qu
ARF\fF|<2
package org.rut.util.algorithm; 1k[GuG%/K
\}#@9=
import org.rut.util.algorithm.support.BubbleSort; Z5B/|{
import org.rut.util.algorithm.support.HeapSort; MDHb'<o?y
import org.rut.util.algorithm.support.ImprovedMergeSort; Y5Z!og
import org.rut.util.algorithm.support.ImprovedQuickSort; !n<o)DsZR
import org.rut.util.algorithm.support.InsertSort; YJ,*(A18
import org.rut.util.algorithm.support.MergeSort; "|t!7hC
import org.rut.util.algorithm.support.QuickSort; w"8V0z
import org.rut.util.algorithm.support.SelectionSort; 9x?'}
import org.rut.util.algorithm.support.ShellSort; aGK@)&h$
gn)R^
/** ((<`zx
* @author treeroot !E0!-UpY
* @since 2006-2-2 X>zlb$
* @version 1.0 =6\LIbO
*/ ]Blf9h7
public class SortUtil { f~ZEdq8
public final static int INSERT = 1; &= eYr{
public final static int BUBBLE = 2; LZ<[ll#C
public final static int SELECTION = 3; ?djQZ*
public final static int SHELL = 4; e |V]
public final static int QUICK = 5; 4 1t)(+r
public final static int IMPROVED_QUICK = 6; BStk&b
public final static int MERGE = 7; EzpFOqJG
public final static int IMPROVED_MERGE = 8; aG{$Ic
public final static int HEAP = 9; <)U4Xz?
hXB|g[zT
public static void sort(int[] data) { tFM$#JN
sort(data, IMPROVED_QUICK); <9eu1^g
} lV6dm=k
private static String[] name={ {mTytT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8P2 J2IU
}; :O-1rD
:P+\p=
private static Sort[] impl=new Sort[]{ FvdeQsc!
new InsertSort(), l]6%lud8_
new BubbleSort(), %,UPJn
new SelectionSort(), cWLqU
new ShellSort(), ~*.-
new QuickSort(), ,S&z<S_
new ImprovedQuickSort(), M;.ZM<Ga
new MergeSort(), ~Z)/RT/
new ImprovedMergeSort(), 1G^#q,%X_v
new HeapSort() GJA`l8`SQ
}; cg{AMeW
Log|%P\
public static String toString(int algorithm){ S\#17.=
return name[algorithm-1]; iG<Som
} l"+Jc1\X
SA"8!soY3
public static void sort(int[] data, int algorithm) { J'T=q/
impl[algorithm-1].sort(data); ;zH HIdQ>-
} _NZ@4+aW
`{Tk@A_yd
public static interface Sort { oBQm05x"
public void sort(int[] data); ZH 6\><My
} l.+yn91%>
3V<&|
public static void swap(int[] data, int i, int j) { >I"V],d!6
int temp = data; q_[G1&MC
data = data[j]; 5&!c7$K0
data[j] = temp; {XCf-{a]~
} 9KuD(EJS
} quxdG>8