[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; A4Sb(X|j
} ~3'}^V\
int i1=l; .^hk^r
int i2=mid+1; &[#iM0;)W0
for(int cur=l;cur<=r;cur++){ lD+f{GR
if(i1==mid+1) ]'q"Kw/10
data[cur]=temp[i2++]; V =9
else if(i2>r) jt5:rWB
data[cur]=temp[i1++]; iup "P
else if(temp[i1] data[cur]=temp[i1++]; CQ;.}=j ,
else |g)/6jG<-
data[cur]=temp[i2++]; (:h#H[F
} mto=_|gn
} {VK
rP%B#%;S"
} sR;^7(f!m
3OZu v};k
改进后的归并排序: /k_?S?
/l6r4aO2=
package org.rut.util.algorithm.support; r P1FM1"M
zLt7jxx
import org.rut.util.algorithm.SortUtil; B QxU~s
.=`r?#0
/** ))NiX^)8^
* @author treeroot SJ0IEPk
* @since 2006-2-2 e09('SON(
* @version 1.0 _DD.#YB</
*/ G?$0OU
public class ImprovedMergeSort implements SortUtil.Sort { p3`odmbN
wbImE;-Z
private static final int THRESHOLD = 10; 8n2MZ9p]
u#bd*(
/* HzdyfZ!jR
* (non-Javadoc) qvHRP@
* G_cWp D/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jT:z#B%
*/ + 7~u_J
public void sort(int[] data) { n-)Xs;`2
int[] temp=new int[data.length]; 31*0b|Z
mergeSort(data,temp,0,data.length-1); .$]%gjIBCl
} V7}3H2]^
~E^lKe
private void mergeSort(int[] data, int[] temp, int l, int r) { Gm1[PAj
int i, j, k; y/9aI/O'
int mid = (l + r) / 2; C]01(UoSZ
if (l == r) D-KQRe2@
return; aK+jpi4?
if ((mid - l) >= THRESHOLD) IUZ@n0/T
mergeSort(data, temp, l, mid); K (!+l
else ?7k%4~H t
insertSort(data, l, mid - l + 1); kD?lMA__
if ((r - mid) > THRESHOLD) a}p}G\b|
mergeSort(data, temp, mid + 1, r); >Y>>lE! k
else =[ZuE0c
insertSort(data, mid + 1, r - mid); iVdY\+N!<
"54t7
for (i = l; i <= mid; i++) { &l-1.muQ
temp = data; 6 {j}Z*)m
} :*<UCn""
for (j = 1; j <= r - mid; j++) { N*$L#L$*
temp[r - j + 1] = data[j + mid]; V/,@hv`+
} "tX=^4
int a = temp[l]; BXj]]S2
int b = temp[r]; .?^a|]
for (i = l, j = r, k = l; k <= r; k++) { 9]]isE8r
if (a < b) { CtO;_;eD'
data[k] = temp[i++]; 0; PV gO;9
a = temp; hH3~O`~
} else { [OU[i(,{
data[k] = temp[j--]; Z8xKg
b = temp[j]; -:]-g:;/
} =ICakh!TO
} ;D>*Pzj
} ;&$Nn'~a
d!z}! :
/** kuI%0)iZn
* @param data y7Sey;
* @param l nMT"Rp
* @param i WUfPLY_c(
*/ WJA0 `<~
private void insertSort(int[] data, int start, int len) { 1[U`,(C1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y(92Th$
} \LbBK ~l-I
} i"Z
} x(r~<a[
} ):5M +
Rv=rO|&]
堆排序： 7,BULs\g
0<4Nf]i
package org.rut.util.algorithm.support; kWW$*d$
XhEJF !
import org.rut.util.algorithm.SortUtil; vlSSw+r9
]ur_G`B
/** QHmF,P
* @author treeroot )&pcRFl
* @since 2006-2-2 ^(c.AYI
* @version 1.0 aFf(m-
*/ Nfo`Q0\[P
public class HeapSort implements SortUtil.Sort{ 8Ts_;uId
g*-%.fNA
/* (non-Javadoc) N:% }KAc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Spm7kw
*/ 2zN"*Wkn
public void sort(int[] data) { ekV|a1)
MaxHeap h=new MaxHeap(); >\s8S}p
h.init(data); U9/6F8D1Y1
for(int i=0;i h.remove(); q:a-tdv2
System.arraycopy(h.queue,1,data,0,data.length); d(!g9H
} P7D__hoE
{I^@BW-
private static class MaxHeap{ ,B8u?{O
n=1_-)
void init(int[] data){ 8{)j"rghah
this.queue=new int[data.length+1]; l1#F1q`^t
for(int i=0;i queue[++size]=data; }T1.~E
fixUp(size); X :wfmb
} ~[ZRE @
} 3<A$lG
`SM37({c
private int size=0; *w,C5 f
=4_Er{AT
private int[] queue; HB:VpNFn
0CR~ vQf#r
public int get() { ,SB5"
return queue[1]; =,w(D~ps
} EZb_8<DH
efUa[XO
public void remove() { {,Z-GJ
SortUtil.swap(queue,1,size--); @{LD_>R
fixDown(1); $z \H*
} )8@|+'q
file://fixdown O+ghw1/
private void fixDown(int k) { <4%cKW0
int j; ;,7/>Vt
while ((j = k << 1) <= size) { }P*x/z~
if (j < size %26amp;%26amp; queue[j] j++; kC8M2|L
if (queue[k]>queue[j]) file://不用交换 tcD DX'S
break; 6i7+.#s
SortUtil.swap(queue,j,k); JZ>E<U9&
k = j; ,C;%AS/
} W<tw],M-#
} ;w(tXcXZ
private void fixUp(int k) { /+JHnedK
while (k > 1) { a,`f`;\7N%
int j = k >> 1; W:S?_JM
if (queue[j]>queue[k]) zkb[u"
break; 'MK"*W8QRM
SortUtil.swap(queue,j,k); ?&_u$Nn
k = j; sp8P[W1a
} eFXQ~~gOj
} S!6 ? b5
9?38/2kX4
} :c}"a(|
u6MHdCJ0y
} O]VHX![Y$
.u3Z*+
SortUtil： peD7X:K\s
H_vGa!_
package org.rut.util.algorithm; /Dj-@7.C/
-J]j=
import org.rut.util.algorithm.support.BubbleSort; <1eD*sC?g
import org.rut.util.algorithm.support.HeapSort; _2~+%{/m,
import org.rut.util.algorithm.support.ImprovedMergeSort; 5lrjM^E|
import org.rut.util.algorithm.support.ImprovedQuickSort; H{U(Rt]K
import org.rut.util.algorithm.support.InsertSort; 5[0W+W
import org.rut.util.algorithm.support.MergeSort; ,?oC+9w
import org.rut.util.algorithm.support.QuickSort; ./i5VBP5
import org.rut.util.algorithm.support.SelectionSort; h\lyt(.s
import org.rut.util.algorithm.support.ShellSort; :D:Y-cG*n<
@Pb%dS
/** `;HZO8
* @author treeroot PfjD!=yS=h
* @since 2006-2-2 H84Zg/ ^
* @version 1.0 %pj T?G7
*/ 8z)J rO}
public class SortUtil { K)N'~jCG
public final static int INSERT = 1; S=_*<[W%4
public final static int BUBBLE = 2; -jWXE
public final static int SELECTION = 3; kHz?vVE/l
public final static int SHELL = 4; BG^)?_69
public final static int QUICK = 5; =k\Qx),Ir
public final static int IMPROVED_QUICK = 6; y"Ios:v@-
public final static int MERGE = 7; 5a%i%+;N
public final static int IMPROVED_MERGE = 8; {&uN q^Ch
public final static int HEAP = 9; apwA
+N2R'Phv
public static void sort(int[] data) { g+%Pg@[
sort(data, IMPROVED_QUICK); ,Fzuo:{uy
} L2> )HG
private static String[] name={ ]=G dAW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r,Tq";N'
}; MHQM'
ZfVw33z
private static Sort[] impl=new Sort[]{ OfPv'rW{x
new InsertSort(), ;U[W $w[
new BubbleSort(), o-+H-
new SelectionSort(), AB=Wj*fr
new ShellSort(), RgSB?
new QuickSort(), <Gj]XAoe%
new ImprovedQuickSort(), avy@)iO7
new MergeSort(), WCyjp
new ImprovedMergeSort(), KMP[Ledr
new HeapSort() lXip%6c7
}; hka`STK{
0w!:YB,}
public static String toString(int algorithm){ *0/%R{+S
return name[algorithm-1]; YJB/*SV^
} /[+qw%>
(sp{.bU
public static void sort(int[] data, int algorithm) { ;7U"wI_~c
impl[algorithm-1].sort(data); ![ @i+hl
} Y/]J0D
xp%LXxj
public static interface Sort { m2v'zJd}g
public void sort(int[] data); L*zfZ&
} 8d[!"lL
y\XWg`X y
public static void swap(int[] data, int i, int j) { 48LzI@H&
int temp = data; u85?f
data = data[j]; f"Kl?IN8
data[j] = temp; mk[<=k~
} ZO&F15$P
} jygKw+C