[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; fRrHWE+
} ItOVx!"@9
int i1=l; 6Mk@,\1
int i2=mid+1; V!},a@>p
for(int cur=l;cur<=r;cur++){ M9f*7{c
if(i1==mid+1) Qr0JJoHT
data[cur]=temp[i2++]; *~&W?i
else if(i2>r) sL&u%7>Re
data[cur]=temp[i1++]; qU2>V
else if(temp[i1] data[cur]=temp[i1++]; $(zJ
else )-jvp8%BK
data[cur]=temp[i2++]; 4,<~t>M1
} &# @1n
} ^x/0*t5};z
L</"m[
} z>y,}#D?C
&S|laqH
改进后的归并排序: y/i"o-}}~|
SxH}/I|W
package org.rut.util.algorithm.support; F=P|vYL&&
!%@n067
import org.rut.util.algorithm.SortUtil; UNY>Q7
7B&nV92S
/** j6v +S
* @author treeroot PL8akA#
* @since 2006-2-2 ~^5uOeTZ~
* @version 1.0 HPpnw]_
*/ /VJ@`]jhDf
public class ImprovedMergeSort implements SortUtil.Sort { R9#Z=f,
M6X f}>
private static final int THRESHOLD = 10; `>#X,Lw$g
/5J! s="
/* 6Jj)[ R\5=
* (non-Javadoc) ,bH
* 5Cz:$-+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wq>j;\3b3
*/ ^d2g"L
public void sort(int[] data) { 0cS.|\ZTA
int[] temp=new int[data.length]; 9td(MZ%i~N
mergeSort(data,temp,0,data.length-1); ~O^_J)
} < )?&Jf>_
0`qq"j[6a
private void mergeSort(int[] data, int[] temp, int l, int r) { $@#nn5^IX
int i, j, k; (ZI&'"H
int mid = (l + r) / 2; A!^,QRkRN
if (l == r) 1zp,Suv
return; j`tUx# h
if ((mid - l) >= THRESHOLD) 9g*~X;`2
mergeSort(data, temp, l, mid); x208^=F\\
else Hv IN'
insertSort(data, l, mid - l + 1); }5S2v+zE
if ((r - mid) > THRESHOLD) #pVk%5N
mergeSort(data, temp, mid + 1, r); $YSOkyC?
else >i ~zG6H
insertSort(data, mid + 1, r - mid); ,~kMkBkl~
Jq; }q63:
for (i = l; i <= mid; i++) { BF@VgozW
temp = data; x)GoxH~#
} 1R:h$*-z
for (j = 1; j <= r - mid; j++) { HmiwpI
temp[r - j + 1] = data[j + mid]; >l7 o/*4
} yT,UM^'
int a = temp[l]; x*)Wl!
int b = temp[r]; +X- k)9
for (i = l, j = r, k = l; k <= r; k++) { sy#Gb#=#
if (a < b) { {6AJ>}3
data[k] = temp[i++]; "vJADQ4F
a = temp; vLC&C-f
} else { Uexb>|
data[k] = temp[j--]; 9wwvh'T&NK
b = temp[j]; u9&p/qMx2
} $i2gOz
} [n^___7
} w5|"cD#8A
2n7[Op
/** |On6?5((e
* @param data :,u+[0-S
* @param l 1|]-F;b
* @param i -WYJ1B0v
*/ ^:q(ksssY
private void insertSort(int[] data, int start, int len) { iVl"H@m/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qI"mW@G~H
} 2V0R|YUt
} :I7MP
} L\B+j+~
} :G`_IB\
%NBD^gF
堆排序： b9vKux
`BvcIn4do
package org.rut.util.algorithm.support; -OHG1"/
*83+!DV|
import org.rut.util.algorithm.SortUtil; ?+!KucTF
5_O.p3$tV
/** *kIJv?%_}
* @author treeroot wx1uduT)
* @since 2006-2-2 ~<eiWDf
* @version 1.0 9}\T?6?8pX
*/ m1<B6*iG"
public class HeapSort implements SortUtil.Sort{ PFc02 w
}Yt0VtLt
/* (non-Javadoc) a[u8x mH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B;@yOm=
*/ 8O7JuR
public void sort(int[] data) { uaGg8
MaxHeap h=new MaxHeap(); s)L7o)56/
h.init(data); IFE C_F>
for(int i=0;i h.remove(); sv[)?1S
System.arraycopy(h.queue,1,data,0,data.length); B|%;(bM2C
} x?%vqg^r
wS5hXTb"
private static class MaxHeap{ '5Y8 rv<
qV}zV\Nz
void init(int[] data){ aB Yhk|Ei
this.queue=new int[data.length+1]; !pN,,H6Y
for(int i=0;i queue[++size]=data; "au"\}
fixUp(size); 4j | vzyc
} @#V{@@3$
} ve.4""\a
"[8](3\v
private int size=0; ;?y?s'>t&
$'&5gFr9
private int[] queue; S:5Nh^K
USbiI%
public int get() { )rXP2Z
return queue[1]; e88JT_zrO
} (zhmZm
z><JbSE?
public void remove() { Ri,UHI4 W
SortUtil.swap(queue,1,size--); FVSz[n
fixDown(1); N( /PJJ~
} uM\~*@
file://fixdown ,wq.C6;&
private void fixDown(int k) { A$oYw(m#
int j; X{ Nif G
while ((j = k << 1) <= size) { |e9}G,1
if (j < size %26amp;%26amp; queue[j] j++; D~1nh%x_
if (queue[k]>queue[j]) file://不用交换 UA/3lH}
break; 0]WM:6 h
SortUtil.swap(queue,j,k); [<%yUy
k = j; Bf7RW[ -v
} *</;:?
} UdY9*k
private void fixUp(int k) { xLGAP-mx]
while (k > 1) { BBp Hp
int j = k >> 1; 8n'C@#{WV
if (queue[j]>queue[k]) 6IvLr+I
break; X&McNO6"
SortUtil.swap(queue,j,k); NZD X93
k = j; J|I|3h<T
} hslJs^
} ckTnb
e%qMrR
} Ck[Z(=b$$:
8RocObY_W
} #<?j784
@P~u k
SortUtil： pY:xxnE
3rWqt
package org.rut.util.algorithm; Gd'^vqo<
^i\zMMR
import org.rut.util.algorithm.support.BubbleSort; xR%CS`0R
import org.rut.util.algorithm.support.HeapSort; Tn-H8;Hg
import org.rut.util.algorithm.support.ImprovedMergeSort; =XYfzR
import org.rut.util.algorithm.support.ImprovedQuickSort; HFf| >&c&
import org.rut.util.algorithm.support.InsertSort; fs`<x*}K
import org.rut.util.algorithm.support.MergeSort; #S1)n[
import org.rut.util.algorithm.support.QuickSort; Ru sa &#[
import org.rut.util.algorithm.support.SelectionSort; bhg"<I
import org.rut.util.algorithm.support.ShellSort; b?Vu9!
+C+3DwN
/** $x 2t0@
* @author treeroot 5v?6J#]2
* @since 2006-2-2 >Cf]uiR
* @version 1.0 D9Q%*DLd$_
*/ u2F 3>s
public class SortUtil { GHoPv-#
public final static int INSERT = 1; H{+U; 6b
public final static int BUBBLE = 2; 9aXm}
public final static int SELECTION = 3; zS?L3*u
public final static int SHELL = 4; Pl 5+Oo
public final static int QUICK = 5; wlkS+$<
public final static int IMPROVED_QUICK = 6; cOS|B1xG
public final static int MERGE = 7; 0tl
public final static int IMPROVED_MERGE = 8; %5uuB4P&|$
public final static int HEAP = 9; MenI>gd?
jIEK[vJ`
public static void sort(int[] data) { 2Ejs{KUj
sort(data, IMPROVED_QUICK); |_2O:7qe
} wCkkfTO
private static String[] name={ z[7U>q[E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S__ o#nf`%
}; ^D6JckW
esxU44
private static Sort[] impl=new Sort[]{ V&qXsyg
new InsertSort(), Gd"lB*^Ht
new BubbleSort(), Z|3l2ucl
new SelectionSort(), _~6AUwM
new ShellSort(), rYc?y
new QuickSort(), w8>p[F5`O
new ImprovedQuickSort(), *S;v406
new MergeSort(), rs!J<CRq
new ImprovedMergeSort(), uD<*g(R
new HeapSort() `oq 3G }
}; F!.@1Fi1
+DVU"d
public static String toString(int algorithm){ ,A_itRHH
return name[algorithm-1]; 'e0qdY`
} C[wnor!
~Fisno
public static void sort(int[] data, int algorithm) { II),m8G
impl[algorithm-1].sort(data); O^ f[ugs
} 3~M8.{ U#V
3A'd7FJ0G
public static interface Sort { b7HS3NYk
public void sort(int[] data); As78yfK
} QK//bV)
/I: d<A
public static void swap(int[] data, int i, int j) { /k7`TUK
int temp = data; r@wWGbQ|L
data = data[j]; v%B^\S3)
data[j] = temp; AvhmN5O=
} _RhCVoeB
} ,]Hn*\@p[c