[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; /]'&cD 1
} od5nRb
int i1=l; m;\nMdn
int i2=mid+1; \#LDX,=
for(int cur=l;cur<=r;cur++){ rab$[?]
if(i1==mid+1) FU/:'/ L
data[cur]=temp[i2++]; 5>+@.hPX
else if(i2>r) TfT^.p*
data[cur]=temp[i1++]; r~YBj>}
else if(temp[i1] data[cur]=temp[i1++]; }$ySZa9
else CHZ/@gc
data[cur]=temp[i2++]; WeaT42*Q{
} H#D:'B j29
} iE HWD.u
R9 Ab.t
} }/&Zo=Q$
:$k1I-^R
改进后的归并排序: FeMgn`q
cu foP&
package org.rut.util.algorithm.support; y<j7iN
wK7w[Xt
import org.rut.util.algorithm.SortUtil; j5" L
dsx<ZwZN>
/** .?5 ~zK
* @author treeroot 036m\7+Qj
* @since 2006-2-2 utuWFAGn A
* @version 1.0 (lS[a
*/ ZD'mwj+K
public class ImprovedMergeSort implements SortUtil.Sort { `h'l"3l
/g!ZU2&l
private static final int THRESHOLD = 10; K>e-IxA);0
>6jal?4u-
/* V^R,j1*
* (non-Javadoc) " "m-5PGYo
* $Wj{B@k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _AX,}9
*/ T9&{s-3*
public void sort(int[] data) { }T(=tfv@
int[] temp=new int[data.length]; 7yT/t1)
mergeSort(data,temp,0,data.length-1); *EvW: <
} )mf|3/o
\%Y`>x.
private void mergeSort(int[] data, int[] temp, int l, int r) { NQ;X|$!zH
int i, j, k; 97\K]Tr
int mid = (l + r) / 2; p7-\a1P3
if (l == r) FXDB> }8
return; hZ452W
if ((mid - l) >= THRESHOLD) K$,<<hl
mergeSort(data, temp, l, mid); mz%l4w?'
else }q]*aADe
insertSort(data, l, mid - l + 1); }A@:JR+|
if ((r - mid) > THRESHOLD) IB|6\uKn
mergeSort(data, temp, mid + 1, r); DJ<+" .v!
else .O'~s/h
insertSort(data, mid + 1, r - mid); aT IzfqCM
Nv.
for (i = l; i <= mid; i++) { (wq8[1Wzup
temp = data; #<"od'{U
} n nAtXVy
for (j = 1; j <= r - mid; j++) { 035jU'
temp[r - j + 1] = data[j + mid]; keRLai7h
} Y)F(-H)
int a = temp[l]; \ui'~n_t]
int b = temp[r]; yc?L OW0
for (i = l, j = r, k = l; k <= r; k++) { #J3o~,t<
if (a < b) { \P+^BG!
data[k] = temp[i++]; p*42 @1,
a = temp; ,(Zxd4?y
} else { ; 8DtnnE
data[k] = temp[j--]; BRM `/s
b = temp[j]; {g1"{
} VFZ?<m
} ,M?8s2?
} u8KQV7E
Dt[+HCCY:
/** -.? @f tY
* @param data b<4nljbx
* @param l !`H{jwH
* @param i /"st sF
*/ jQm~F`z
private void insertSort(int[] data, int start, int len) { >Rt:8uurAG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }=R0AKz!Cv
} :{)uD ;
} 5PZ7-WJ/
} Q&{C%j~N
} t !6sU]{
R|8L'H+1x
堆排序： 467"pqT
UakVmVN/P
package org.rut.util.algorithm.support; C=r`\W
X41Qkf{
import org.rut.util.algorithm.SortUtil; <a$!S
N}%AUm/L
/** *j]Bo,AC
* @author treeroot AQ(n?1LU
* @since 2006-2-2 2IW!EUR
* @version 1.0 WvT H+
*/ y `FZ 0FI
public class HeapSort implements SortUtil.Sort{ kI!@J6
j0+D99{R
/* (non-Javadoc) KzV|::S^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q?mpvpLG
*/ eq%cRd]u
public void sort(int[] data) { xS%&l)dT
MaxHeap h=new MaxHeap(); IoJI|lP
h.init(data); O>hh
for(int i=0;i h.remove(); 0lniu=xmQ-
System.arraycopy(h.queue,1,data,0,data.length); 8g)$%Fy+N
} C}<e3BXc
D=z="p\
private static class MaxHeap{ ]!sCWR
6?%$e$s
void init(int[] data){ ]!^wB 3j
this.queue=new int[data.length+1]; "@^<~bw
for(int i=0;i queue[++size]=data; -QJ8\/1>
fixUp(size); j*|0#q;e6
} Mx6 yk,
} ca3zY|Oo
BaI-ve
private int size=0; oKGF'y?A>
k3t]lGp
private int[] queue; Ih.)iTs~%
bcwb'D\a
public int get() { c-&Q_lB
return queue[1]; +{=U!}3|
} $eT[`r
./3/3&6
public void remove() { (?'vT%
SortUtil.swap(queue,1,size--); *2-b&PQR{
fixDown(1); {ixKc
} 6(7{|iY
file://fixdown Q~ Ad{yC
private void fixDown(int k) { hG~.Sc:G
int j; -a>CF^tH
while ((j = k << 1) <= size) { LNR1YC1c
if (j < size %26amp;%26amp; queue[j] j++; (D?4*9=
if (queue[k]>queue[j]) file://不用交换 }z/%b<o_
break; hNYO+LrI)
SortUtil.swap(queue,j,k); zQ,M795@EA
k = j; ewn\'RLZ"@
} Wf8@B#^{
} q%q+2P>
private void fixUp(int k) { .p=J_%K}0x
while (k > 1) { LqI&1$#
int j = k >> 1; N-2_kjb!
if (queue[j]>queue[k]) Bf y
break; =&k[qqxg
SortUtil.swap(queue,j,k); 0Cf'\2
k = j; /mp!%j~
} h {Jio>
} &$2d=q8mh
jPz1W4pk
} >#&25,Q
OY81|N j
} 6 F39'
#+_=(J
SortUtil： iuXXFuh
T zS?WYF
package org.rut.util.algorithm; ,d lq2
0/|Ax-dK
import org.rut.util.algorithm.support.BubbleSort; sl@>GbnS
import org.rut.util.algorithm.support.HeapSort; 4HZXv\$
import org.rut.util.algorithm.support.ImprovedMergeSort; XABP}|aWK
import org.rut.util.algorithm.support.ImprovedQuickSort; VuTTWBx
import org.rut.util.algorithm.support.InsertSort; HbPn<x^7
import org.rut.util.algorithm.support.MergeSort; Iy;"ht6
import org.rut.util.algorithm.support.QuickSort; PU%f`)
import org.rut.util.algorithm.support.SelectionSort; *PFQ
import org.rut.util.algorithm.support.ShellSort; z#`Qfvu6Hi
tUOY`]0
/** Nc[N 11?O
* @author treeroot Zw{?^6;cS
* @since 2006-2-2 GNuIcy
* @version 1.0 j-"34
*/ TUwX4X6m
public class SortUtil { N8kNi4$mp=
public final static int INSERT = 1; =a+ } 6
public final static int BUBBLE = 2; 2/A*\
public final static int SELECTION = 3; 9* 3;v;F
public final static int SHELL = 4; =~W=}
public final static int QUICK = 5; ci2Z_JA+
public final static int IMPROVED_QUICK = 6; tcl9:2/^]
public final static int MERGE = 7; SvkCx>6/G
public final static int IMPROVED_MERGE = 8; Z 1wtOL
public final static int HEAP = 9; 3Ur_?PM+C
'`<Fys&:
public static void sort(int[] data) { -'D~nd${
sort(data, IMPROVED_QUICK); ! N!pvK;
} r: >RH,
private static String[] name={ mqsAYzG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^[bFGKE
}; -O1$jBQS
]n"RPktx
private static Sort[] impl=new Sort[]{ [742s]j
new InsertSort(), Nr*X1lJ6
new BubbleSort(), w?8\9\ ;?
new SelectionSort(), A1Uy|Dl
new ShellSort(), B1U!*yzG6
new QuickSort(), GNrRc3dr$
new ImprovedQuickSort(), l. cp[
new MergeSort(), NMhpKno
new ImprovedMergeSort(), rx9y^E5T`;
new HeapSort() ?>V>6cDQ
}; YjL'GmL<
[Pjitw/?
public static String toString(int algorithm){ v#s*I/kw
return name[algorithm-1]; z6B#F<h
} -nHkO&&R
gzKMGL?%?
public static void sort(int[] data, int algorithm) { S!gzmkGcj
impl[algorithm-1].sort(data); [iO8R-N8d
} eGpKoq7a
#+U1QOsz
public static interface Sort { 1$C?+H
public void sort(int[] data); zv/dj04>
} ?fC9)s
d8 Jf3Mo
public static void swap(int[] data, int i, int j) { Wuk8&P3
int temp = data; 0m> 8
data = data[j]; *pnaj\
data[j] = temp; Uzrf,I[
} 6L\]Ee
} zd!%7 UP