[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; 01q5BQ7u
} +K2jYgy
int i1=l; =p|,~q&i
int i2=mid+1; ?cf9q@eAH
for(int cur=l;cur<=r;cur++){ RVtb0FL
if(i1==mid+1) O7bTu<h=
data[cur]=temp[i2++]; e>1z1Q;_uv
else if(i2>r) "1_eZ`
data[cur]=temp[i1++]; XJTY91~R
else if(temp[i1] data[cur]=temp[i1++]; )2C`;\/:
else /,A:HM>B
data[cur]=temp[i2++]; QcG4~DEX4
} ^.y}2
} <m"Zk k
mu0ER 3o
} IBr?6_\%"4
/qA\|'~
改进后的归并排序: ]Ow A>fb
7:t+
package org.rut.util.algorithm.support; Hj"`z6@7
_c?&G`
import org.rut.util.algorithm.SortUtil; J<BBM.^]
jV`xRjh
/** HYf&0LT<11
* @author treeroot 0t?:
* @since 2006-2-2 ax&,
* @version 1.0 $5T3JOFz
*/ _!kL7qJ"
public class ImprovedMergeSort implements SortUtil.Sort { !_)*L+7f_
n#,|C`2r
private static final int THRESHOLD = 10; hl?G_%a
U7(84k\j
/* rI)op1K
* (non-Javadoc) Hrm^@3
* w N9I )hB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BXyg ?
*/ _U;z@
public void sort(int[] data) { hb'S!N5m
int[] temp=new int[data.length]; &m_4#
mergeSort(data,temp,0,data.length-1); \&|)?'8rS
} \wqi_[A
,[&@?
private void mergeSort(int[] data, int[] temp, int l, int r) { 0q(}nv
int i, j, k; EOWLGleD1
int mid = (l + r) / 2; pme5frM|
if (l == r) 'v iF8?_
return; deO/`
if ((mid - l) >= THRESHOLD) l -us j%\
mergeSort(data, temp, l, mid); -bT1Qh X
else -v#0.3zm
insertSort(data, l, mid - l + 1); hDI_qZ
if ((r - mid) > THRESHOLD) 0@[]l{N
mergeSort(data, temp, mid + 1, r); oA`'~~!
else ys|a ^VnN
insertSort(data, mid + 1, r - mid); <z+5+h|^
1*<m,.$
for (i = l; i <= mid; i++) { jh\L)a*
temp = data; W3K?K-
} $-'p6^5
for (j = 1; j <= r - mid; j++) { Mq;m+{B
temp[r - j + 1] = data[j + mid]; H@o3u>}
} Ha{#
int a = temp[l]; ^%tmHDNL.
int b = temp[r]; G$&SlJZEk
for (i = l, j = r, k = l; k <= r; k++) { +x$GwX
if (a < b) { ~p^&`FA
data[k] = temp[i++]; }S|~^
a = temp; 8TIc;'bRM
} else { VuZd
data[k] = temp[j--]; (;-< @~2
b = temp[j]; 2.6%?E]
} Xi`K`Cu+
} [h20y
} -E_lwK
`MtI>x c
/** ;(AVZxCM
* @param data wd&Tf R4!
* @param l ew8f7S[
* @param i udYk 6
*/ +Zgh[a
private void insertSort(int[] data, int start, int len) { R:8\z0"L*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S?n,O+q
} jt5en;AA[
} dHjJLs_
} WBdC}S }3t
} k!-(Qfz
uBp"YX9rx
堆排序： ea!_/Y
,q$'hYTaJ
package org.rut.util.algorithm.support; &' E(
|E)-9JSRy
import org.rut.util.algorithm.SortUtil; _Eo$V&
R]hilb'a
/** G`3/${ti
* @author treeroot AB92R/
* @since 2006-2-2 HAJK%zLc
* @version 1.0 CYD&#+o
*/ 8wJfGY
public class HeapSort implements SortUtil.Sort{ ;G!JKg
oqeA15k$
/* (non-Javadoc) %!Z9: +;B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {x$WBy9
*/ uR#aO''
public void sort(int[] data) { @}sxA9a
MaxHeap h=new MaxHeap(); eiE36+'>b
h.init(data); zi M~V'
for(int i=0;i h.remove(); 0~2~^A#]\
System.arraycopy(h.queue,1,data,0,data.length); 08*bYJu
} t;g=@o9YA
<49Gsm&0
private static class MaxHeap{ M}Sn$h_
{uVvo=3
void init(int[] data){ LDilrG)
this.queue=new int[data.length+1]; h8#14?
for(int i=0;i queue[++size]=data; ft$@':F
fixUp(size); 'a8{YT4
} Fo K!JX*
} X.^S@3[
i> }P V
private int size=0; i}d^a28
a'3|EWS ?
private int[] queue; K1i@.`na/$
B.)!zv\{
public int get() { 53>y<
return queue[1]; tS|gQUF17
} DbDi n
\C<|yD
public void remove() { T\Zf`.mt
SortUtil.swap(queue,1,size--); |^: A,%>
fixDown(1); S3Q^K.e?
} `1;m:,9
file://fixdown !kAjne8]d
private void fixDown(int k) { E8$k}I
int j; j0^%1
while ((j = k << 1) <= size) { &z'NQ!uV
if (j < size %26amp;%26amp; queue[j] j++; LHit9O[_/s
if (queue[k]>queue[j]) file://不用交换 &d1|B`gL|
break; glk-: #
SortUtil.swap(queue,j,k); ]Dj,8tf`H
k = j; AunX[X9
} #m %ZW3
} of?hP1kl[
private void fixUp(int k) { K9\p=H^T7
while (k > 1) { }.+{M.[}
int j = k >> 1; $Sz@u"ig%
if (queue[j]>queue[k]) t}$WP&XRG<
break; ollJ#i9
SortUtil.swap(queue,j,k); O{YT6&.S0
k = j; -|Z[GN:
} #j!RbW
} OFcLh
nd~cpHQR^
} zn!H&!8&
w +pK=R
} &d5n_:^
K=S-p3\g
SortUtil： 7sgK+ ip
e+'PRVc
package org.rut.util.algorithm; $q}zW%
=t@8Y`9w
import org.rut.util.algorithm.support.BubbleSort; )Q:.1Hgl
import org.rut.util.algorithm.support.HeapSort; e u{
import org.rut.util.algorithm.support.ImprovedMergeSort; L$T23*9XY
import org.rut.util.algorithm.support.ImprovedQuickSort; Q}/2\Q=)j
import org.rut.util.algorithm.support.InsertSort; 1a_R8j
import org.rut.util.algorithm.support.MergeSort; c:[z({`
import org.rut.util.algorithm.support.QuickSort; I[P43>F3
import org.rut.util.algorithm.support.SelectionSort; Ii*tux!S
import org.rut.util.algorithm.support.ShellSort; 1W@ C]n4
k 5~#_D>
/** h`{agWB
* @author treeroot 0j@nOj(3
* @since 2006-2-2 #ZzFAt
* @version 1.0 W>^WNo3YQ$
*/ '+%<\.$
public class SortUtil { kMJf!%L(
public final static int INSERT = 1; q$#5>5&
public final static int BUBBLE = 2; E[IjeJB5
public final static int SELECTION = 3; h\]D:S
public final static int SHELL = 4; 3u&>r-V6Fn
public final static int QUICK = 5; *?l-:bc]
public final static int IMPROVED_QUICK = 6; $C&y-Hnar
public final static int MERGE = 7; l*l?aI
public final static int IMPROVED_MERGE = 8; >VnBWa<j3
public final static int HEAP = 9; B<V8:vOam
KM'*+.I
public static void sort(int[] data) { yUUg8xbpxF
sort(data, IMPROVED_QUICK); |IN{8
} IF>dsAAI<
private static String[] name={ *F4"mr|\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yX`5x^wVw
}; "xr=:[n[
(SH<]@s
private static Sort[] impl=new Sort[]{ "#ctT-g`6
new InsertSort(), `]u!4pP"
new BubbleSort(), /"q wC
new SelectionSort(), AbqeZn
new ShellSort(), pgp@Zw)r)k
new QuickSort(), L4Nn:9b
new ImprovedQuickSort(), bi:TX<K+
new MergeSort(), JI)@h 4b
new ImprovedMergeSort(), `jI$>{oa
new HeapSort() 'MWu2L!F
}; Es7+bFvsE8
f!H~BMA+a
public static String toString(int algorithm){ w!GPPW(
return name[algorithm-1]; )qbjX{GZ7
} zw2qv'
L lNd97Z
public static void sort(int[] data, int algorithm) { Tgf\f%,h
impl[algorithm-1].sort(data); `l%)0)T
} m|/q o
g`n5-D@3
public static interface Sort { < 2mbR
public void sort(int[] data); K[j~htC{I"
} ktEdbALK
vq?aFX9F
public static void swap(int[] data, int i, int j) { P5$L(x%~
int temp = data; b235Zm
data = data[j]; REK(^1 h
data[j] = temp; 5LYzX+a)
} Hv3<gyD
} WP}NHz4H