[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; _d#1muZ?p|
} WgxGx`Y)
int i1=l; '?Mt*%J@=$
int i2=mid+1; poZ04Uxo>
for(int cur=l;cur<=r;cur++){ zW^_w&fd^j
if(i1==mid+1) ^gb3DNV~y
data[cur]=temp[i2++]; G_GV
else if(i2>r) 'c[[H3s!;
data[cur]=temp[i1++]; <l/QS3M
else if(temp[i1] data[cur]=temp[i1++]; tC0:w,C)
else p^|IN'lx,
data[cur]=temp[i2++]; ]Ek6EuaK
} <j}n/G]
} _i_^s0J
g.wp }fz
} |JZ3aS
v~f_~v5J!
改进后的归并排序: #k%$A}9
s}8(__|
package org.rut.util.algorithm.support; /5qeNjI+2
!~+"TI}_%w
import org.rut.util.algorithm.SortUtil; 'R&Y pR
X]^FHYjhS
/** OAoTsqj6
* @author treeroot f)`_su U
* @since 2006-2-2 \LYB% K}
* @version 1.0 4e6x1`Y{xB
*/ C-i9F%..
public class ImprovedMergeSort implements SortUtil.Sort { i3bH^WwE&k
X$aN:!1
private static final int THRESHOLD = 10; F't4Q
x=1Iuc;&3
/* [$PW {d8|
* (non-Javadoc) N03)G2
* Y?ADM(j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +#%#QL
*/ BE`{? -G
public void sort(int[] data) { 97/"5i9
int[] temp=new int[data.length]; =:)p\{B
mergeSort(data,temp,0,data.length-1); }HO3D.HE^
} ,8~qnLy9
*C/bf)w
private void mergeSort(int[] data, int[] temp, int l, int r) { ;WydXQ}Q^
int i, j, k; eIZ7uSl
int mid = (l + r) / 2; yQAW\0`
if (l == r) Y nD_:ZK
return; :c4iXK0_^?
if ((mid - l) >= THRESHOLD) %N jRD|
mergeSort(data, temp, l, mid); (OA-Mgyc
else ]>j>bHG
insertSort(data, l, mid - l + 1); OVwcjhQ
if ((r - mid) > THRESHOLD) /y8=r"'G
mergeSort(data, temp, mid + 1, r); MIV<"A
else L="ipM:Z
insertSort(data, mid + 1, r - mid); ?8ZOiY(
#b u]@/
for (i = l; i <= mid; i++) { <OX_6d*@
temp = data; ( (.b&
} OvL@@SX |
for (j = 1; j <= r - mid; j++) { 9T`$gAI
temp[r - j + 1] = data[j + mid]; pD^7ZE6
} WJ%4IaT
int a = temp[l]; ,]A|z ~q
int b = temp[r]; 5Q)hl.<{o7
for (i = l, j = r, k = l; k <= r; k++) { @1+gY4g
if (a < b) { _/FpmnaY
data[k] = temp[i++]; z|KQiLza
a = temp; OoW,mmthj>
} else { ??\1eo2gB
data[k] = temp[j--]; 41-u*$
b = temp[j]; g0Rny
} ua!i3]18
} !p:kEIZ)y
} Ge'[AhA
`S`,H
/** $N !l-lu=
* @param data @u@N&{b5"
* @param l \`ya08DP(
* @param i p(B^](?
*/ ,, 8hU7P
private void insertSort(int[] data, int start, int len) { 3shRrCL0mf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }da}vR"iL
} Eo\pNz#)
} /Bt+Ov3k
} )Y@E5Tuk>
} wwvS05=[T
,@\$PyJ
堆排序： bD2):U*Fzo
&ikPa,A
package org.rut.util.algorithm.support; hg2a,EU\Z
ILN Yh3
import org.rut.util.algorithm.SortUtil; sJI" m'r=Z
aXv[~
/** ec8iZ8h8
* @author treeroot M%yeI{m
* @since 2006-2-2 ?*{Vn5aX{
* @version 1.0 x=S8UKUx
*/ 0A,u!"4[
public class HeapSort implements SortUtil.Sort{ VnjhEEM!
k},@2#W]
/* (non-Javadoc) n]3Lqe;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g-C)y 06
*/ f9%M:cl
public void sort(int[] data) { !t;B.[U *
MaxHeap h=new MaxHeap(); #<$pl]>}t
h.init(data); \!51I./Q/
for(int i=0;i h.remove(); iBqxz:PHN(
System.arraycopy(h.queue,1,data,0,data.length); c"wk_#
} rtjUHhF
s%bm1$}
private static class MaxHeap{ k<Y}BvAYB
_?}[7K!~d
void init(int[] data){ 6E^h#Ozl 9
this.queue=new int[data.length+1]; BN_I#8r
for(int i=0;i queue[++size]=data; nB|m!fi<
fixUp(size); KbXENz&C
} 4MFdhJoN
} pu"m(9
M?gc&2Y
private int size=0; G7qB
pdw;SIoC
private int[] queue; |//D|-2
vkjHh.
public int get() { (kYwD
return queue[1]; J<9;Ix8R
} ov 'g'1}
)yTBtYw3
public void remove() { GG=R!+p2
SortUtil.swap(queue,1,size--); X/8TRiTFv
fixDown(1); 2Wx~+@1y
} Qi;62M
file://fixdown Ya*<me>`
private void fixDown(int k) { -d*zgP
int j; lZ*V.-D^]
while ((j = k << 1) <= size) { 0en Bq>vr
if (j < size %26amp;%26amp; queue[j] j++; _xmS$z)TO
if (queue[k]>queue[j]) file://不用交换 i-YSt5iq
break; :Z R5<Y>
SortUtil.swap(queue,j,k); U =i=E}'
k = j; H %bXx-
} (i.7\$4
} /5wIbmz@I
private void fixUp(int k) { %.rVIc"
while (k > 1) { .4cVX|T
int j = k >> 1; |?gO@?KDZ
if (queue[j]>queue[k]) N<N uBtkA
break; NI^jQS M]
SortUtil.swap(queue,j,k); my}l?S[2d@
k = j; t_"]n*zk1
} L; o$vI~U,
} 1$S`>M%a
2v\<MrL
} lD-HQd
sK/Z'h{|
} Qn!KL0w
khb/"VYd
SortUtil： \c\z 6;j
$/FL)m8.3
package org.rut.util.algorithm; S\S31pYT
6k6}SlN[
import org.rut.util.algorithm.support.BubbleSort; 0% zy 6{
import org.rut.util.algorithm.support.HeapSort; 9=}&evGm89
import org.rut.util.algorithm.support.ImprovedMergeSort; T1U8ZEK<iu
import org.rut.util.algorithm.support.ImprovedQuickSort; U3^3nL-M9
import org.rut.util.algorithm.support.InsertSort; C@P*:L_
import org.rut.util.algorithm.support.MergeSort; _@D"XL#L
import org.rut.util.algorithm.support.QuickSort; [Te"|K':
import org.rut.util.algorithm.support.SelectionSort; \Gm\sy
import org.rut.util.algorithm.support.ShellSort; laQ{nSVBm
C~X"ZW:d[
/** nJ|M
* @author treeroot d "%6S*dL
* @since 2006-2-2 ]j+J^g
* @version 1.0 ,382O$C
*/ 9YvK<i&I
public class SortUtil { ^JY,K
public final static int INSERT = 1; pmuT7*<19
public final static int BUBBLE = 2; DmiZ"A
public final static int SELECTION = 3; =`OnFdI
public final static int SHELL = 4; S7h?tR*u
public final static int QUICK = 5; L(q~%
public final static int IMPROVED_QUICK = 6; vRLWs`1j
public final static int MERGE = 7; 6E$ET5p&l
public final static int IMPROVED_MERGE = 8; &sooXKlv|
public final static int HEAP = 9; 0QY9vuhL<
Ga\kvMtr
public static void sort(int[] data) { v+W4wD
sort(data, IMPROVED_QUICK); sMcN[r
} U nS|""
private static String[] name={ tja7y"(]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bO+e?&vQ%
}; LY2QKjgP
[6CWgQ%Ue
private static Sort[] impl=new Sort[]{ CcZM0
new InsertSort(), @c=bH>Oz
new BubbleSort(), Yb?(Q%
new SelectionSort(), $9ys! <g
new ShellSort(), H^JFPvEc
new QuickSort(), KeWIC,kq
new ImprovedQuickSort(), ]Y3s5#n
new MergeSort(), jZ0/@zOf
new ImprovedMergeSort(), x\!vr.
new HeapSort() =a6e*f
}; A\v]ZN4
7Mb-v}
public static String toString(int algorithm){ aPin6L$;)
return name[algorithm-1]; u-=VrHff^*
} J+=?taZ
K1t>5zm
public static void sort(int[] data, int algorithm) { V U~r~
impl[algorithm-1].sort(data); QG 1vP.K
} g2 tM!IRQ
ztC>*SX
public static interface Sort { )D"2Q:
public void sort(int[] data); )PvB^n
} _.xicov
,f$ftn\~j/
public static void swap(int[] data, int i, int j) { r[P+F
int temp = data; }LryRcrD-n
data = data[j]; 2U) 0k*
data[j] = temp; U98e=57N
} 9-EdT4=r,
} V1\Rj0#G