[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; hcCp,b
} !BIOY!M
int i1=l; "B7`'jz
int i2=mid+1; -Sv"gLB
for(int cur=l;cur<=r;cur++){ @p=AWi}\
if(i1==mid+1) ShOX<Fb&
data[cur]=temp[i2++]; T(?HMyg3
else if(i2>r) nR;D#"p%
data[cur]=temp[i1++]; Ddju~510
else if(temp[i1] data[cur]=temp[i1++]; 25y6a|`
else TCKu,}s
data[cur]=temp[i2++]; @Yw,nQE)b
} VR{+f7:}
} #uCB)n&.
vV?rpe|%
} arK_oh0B
{No L
改进后的归并排序: a`Qot
XM1`x
package org.rut.util.algorithm.support; qO1tj'U<
\00DqL(Oj`
import org.rut.util.algorithm.SortUtil; Z"-L[2E/{!
~V=<3X
/** q%>'4_
* @author treeroot aolN<u3G
* @since 2006-2-2 KW^<,qt5w
* @version 1.0 !9iGg*0dx
*/ /$N~O1"0)
public class ImprovedMergeSort implements SortUtil.Sort { ^eYqll/U
VZn=rw
private static final int THRESHOLD = 10; 7%?jL9Vw
QnouBrhO
/* yF._*9Q3hK
* (non-Javadoc) Ck =;1sGh
* B$Z3+$hfF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P,DC7\
*/ ?L) !pP]
public void sort(int[] data) { RkEN ,xWE
int[] temp=new int[data.length]; gR^>3n'
mergeSort(data,temp,0,data.length-1); ~ (On|h
} -Ng'<7
Z#l%r0(o
private void mergeSort(int[] data, int[] temp, int l, int r) { q"qo.TPh|$
int i, j, k; zLw{ {|
int mid = (l + r) / 2; lq:}0<k
if (l == r) zhI#f0c
return; 6M.;@t,Y
if ((mid - l) >= THRESHOLD) YV4#%I!<
mergeSort(data, temp, l, mid); =SOe}!
else SAV%4
insertSort(data, l, mid - l + 1); qo6y %[
if ((r - mid) > THRESHOLD) zQ6p+R7D
mergeSort(data, temp, mid + 1, r); 0H_!Kg
else v60^4K>
insertSort(data, mid + 1, r - mid); 9i5,2~
rX7QbAB
for (i = l; i <= mid; i++) { s?Uh|BfB
temp = data; r`S< A;
} xda; K~w
for (j = 1; j <= r - mid; j++) { M]v=-
temp[r - j + 1] = data[j + mid]; U).*q?.z
} $*a'84-5G-
int a = temp[l]; <N,)G |&
int b = temp[r]; DHC+C4
for (i = l, j = r, k = l; k <= r; k++) { f;SC{2f
if (a < b) { H1"q
data[k] = temp[i++]; `p kMN
a = temp; _M[,!{C
} else { {%v-(
data[k] = temp[j--]; n(nBRCG)o
b = temp[j]; Y<"7x#AB!
} cV{%^0?D
} 5v)(8|.M
} %%ae^*[!n
:1q4"tv|
/** q-ES6R
* @param data W,@ If}
* @param l &5{xXWJK
* @param i -tsDMji~V
*/ ;!< Znw
private void insertSort(int[] data, int start, int len) { e,_-Je
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6pOx'u>h+
} nnb8Gcr
} >gKh
} 5m:i6,4
} RyB~Lm`ZK%
g @I6$Z
堆排序： dUznxZB
V}o n|A
package org.rut.util.algorithm.support; 39F Of
^taBG3P
import org.rut.util.algorithm.SortUtil; |IoB?^_h
juF{}J2
/** |]Z:&[D]i
* @author treeroot e pCLM_yA
* @since 2006-2-2 YKbCdLQ
* @version 1.0 j/T>2|dA&
*/ (}r|yE
public class HeapSort implements SortUtil.Sort{ mV73 \P6K
4Tc&IwR
/* (non-Javadoc) Zc |/{$>:W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CBQhIvq.d
*/ SQ,?N XZ
public void sort(int[] data) { <!$:8ls
MaxHeap h=new MaxHeap(); (KZHX5T=
h.init(data); Sw`RBN[ yo
for(int i=0;i h.remove(); F;lI+^}}
System.arraycopy(h.queue,1,data,0,data.length); depYqYK7G
} <WXzh5D2
+(D$9{y
private static class MaxHeap{ "1q>At
:f5s4N
void init(int[] data){ &0TVi
this.queue=new int[data.length+1]; :M{Y,~cP
for(int i=0;i queue[++size]=data; qzw'zV
fixUp(size); iGDLZE+?
} cH-@V<
} E Uar/
0qjXQs}
private int size=0; {*ZY(6^
7J28JK
private int[] queue; aKUS5jDu
\?j E#^
public int get() { "!>DX1rsi
return queue[1]; ]u-]'P
} X.K<4N0A9J
``,k5!a66\
public void remove() { 3lLMu B+
SortUtil.swap(queue,1,size--); BYW^/B Y)
fixDown(1); @''GPL@
} (\"k&O{
file://fixdown 6ZgU"!|r
private void fixDown(int k) { <D&)OxEn\
int j; to8X=80-3
while ((j = k << 1) <= size) { &bqT/H18
if (j < size %26amp;%26amp; queue[j] j++; }7G8|54t
if (queue[k]>queue[j]) file://不用交换 FG3UZVUg9
break; dw~p?[
SortUtil.swap(queue,j,k); f"7M^1)h2%
k = j; w#JJXXQI
} M'`;{^<
} y~ G.V,0
private void fixUp(int k) { Zn,>]X
while (k > 1) { <XTU8G
int j = k >> 1; %;D+k
if (queue[j]>queue[k]) S.B<pjgt
break; $qF0ltUQ
SortUtil.swap(queue,j,k); t:JI!DR
k = j; %dErnc$
} Iu~\L0R427
} 58%'UwKn
?6c-7QV
} j7FN\ cz
G5dO 3lwq
} q(5j(G ;
O=)
SortUtil： H$ftGwS8
[ rNXQ`/
package org.rut.util.algorithm; /2{5;
.yT8NTu~0j
import org.rut.util.algorithm.support.BubbleSort; mD:IO
import org.rut.util.algorithm.support.HeapSort; FtufuL?JS
import org.rut.util.algorithm.support.ImprovedMergeSort; T{]~07N?
import org.rut.util.algorithm.support.ImprovedQuickSort; [md u!!*
import org.rut.util.algorithm.support.InsertSort; ]maYUKqv}'
import org.rut.util.algorithm.support.MergeSort; 5#3W5z
import org.rut.util.algorithm.support.QuickSort; I~,G
import org.rut.util.algorithm.support.SelectionSort; C^t(^9
import org.rut.util.algorithm.support.ShellSort; =S[yE]v^
0Iud$Lu
/** ?::NO Dg
* @author treeroot IdIrI
* @since 2006-2-2 #jpoHvth
* @version 1.0 3:"]Rn([P
*/ c/L>>t
public class SortUtil { Mh(]3\
public final static int INSERT = 1; H?}[r)|(3i
public final static int BUBBLE = 2; P+MA*:
public final static int SELECTION = 3; A392=:N+Q
public final static int SHELL = 4; nI*/Mhx
public final static int QUICK = 5; Q@e[5RA+]
public final static int IMPROVED_QUICK = 6; Mcw4!{l`
public final static int MERGE = 7; n[Zz]IO,g
public final static int IMPROVED_MERGE = 8; , "jbq~
public final static int HEAP = 9; d;Hn#2C
syx\gz
public static void sort(int[] data) { G.+l7bnZM
sort(data, IMPROVED_QUICK); B)$c|dUV
} WWwUwUi
private static String[] name={ a/~aFmu6b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #8{F9w<Rf
}; !>x|7
lX:|iB
private static Sort[] impl=new Sort[]{ OE)~yKy
new InsertSort(), ?EMK8;
new BubbleSort(), bG&"9b_c
new SelectionSort(), 2c<&eX8"
new ShellSort(), $=sXAK9
new QuickSort(), IUGz =%[
new ImprovedQuickSort(), A>VI{
new MergeSort(), ?6Cz[5\
new ImprovedMergeSort(), rdJm{<
new HeapSort() |5I'CNi\
}; xy+QbDT
"O+5R(XT
public static String toString(int algorithm){ v]2S`ffP
return name[algorithm-1]; q,<[hBri-
} O#nR>1h
_ 7oV<
public static void sort(int[] data, int algorithm) { k<w(i k1bi
impl[algorithm-1].sort(data); 89{HJ9}
} =U OLT>!
<VjJAu
public static interface Sort { 3>zN/f
public void sort(int[] data); /)N@M
} ?!w^`D0}o
6nDV1O5
public static void swap(int[] data, int i, int j) { L+B?~_*
int temp = data; OYM@szM
data = data[j]; =9L$L|W
data[j] = temp; d lH$yub
} iK;dU2h
} +&tgJ07A