[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; ?zW'Hi
} A2|Bbqd
int i1=l; g:o/^_
int i2=mid+1; uNN/o}Qx
for(int cur=l;cur<=r;cur++){ ~}.C*;J
if(i1==mid+1) x?Abk
data[cur]=temp[i2++]; }r:"X<`
else if(i2>r) |_;kQ(,
data[cur]=temp[i1++]; + [w 0;W_
else if(temp[i1] data[cur]=temp[i1++]; e~]P _53
else sL$sj|"S
data[cur]=temp[i2++]; p&(0e,`z/
} 74Jx\(d
} \ND]x]5d
\p4*Q}t
} 6] x6FeuS
T lXS}5^
改进后的归并排序: C4mkt2Eb0a
yu;EL>G_AY
package org.rut.util.algorithm.support; 3:,%>#"
!>sA.L&=
import org.rut.util.algorithm.SortUtil; X-\$<DiJGv
9q`Ewj R
/** QVT0.GzR
* @author treeroot G\sx'#Whc
* @since 2006-2-2 w <r*&
* @version 1.0 +(+lbCW/
*/ xV> .]
public class ImprovedMergeSort implements SortUtil.Sort { ht-'O"d:
REh"/d
private static final int THRESHOLD = 10; 5U2%X pO
K*@?BE
/* 1)z'-dQ-5$
* (non-Javadoc) f(Xin3#'
* +~5Lo'^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o?a2wY^_
*/ L4po1
public void sort(int[] data) { 0~nX7
int[] temp=new int[data.length]; Ua}R3^_)a
mergeSort(data,temp,0,data.length-1); {!I`EN]
} OxJHhF
jJ2rfdfj
private void mergeSort(int[] data, int[] temp, int l, int r) { [G_ ;78
int i, j, k; !X}+JeU'
int mid = (l + r) / 2; < se~wR
if (l == r) ]3v)3Wp
return; qz`-?,pF
if ((mid - l) >= THRESHOLD) LQF;T7VKS)
mergeSort(data, temp, l, mid); 02]HwsvZ
else <aPZE6z
insertSort(data, l, mid - l + 1); aj?ZVa6
if ((r - mid) > THRESHOLD) ]9QXQH
mergeSort(data, temp, mid + 1, r); ;6V~yB
else C6>_wl]
insertSort(data, mid + 1, r - mid); G? SPz
_{o 3y"DZ
for (i = l; i <= mid; i++) { !!.@F;]W
temp = data; jZ~girA
} o6u^hG6~'
for (j = 1; j <= r - mid; j++) { g3ukx$Q{>
temp[r - j + 1] = data[j + mid]; C^$E#|E9N
} )v(rEY
int a = temp[l]; "-:H$
int b = temp[r]; rO}1E<g (
for (i = l, j = r, k = l; k <= r; k++) { %p\~
if (a < b) { Aw7N'0K9UN
data[k] = temp[i++]; $?ss5: S
a = temp; ?8753{wk
} else { %g?M?D8Ud3
data[k] = temp[j--]; v}!lx)#
b = temp[j]; 61_PSScSY
} Ja1`S+
} `@y~JNf!
} TFHYB9vV
J{4=:feIC?
/** ZKI8x1>Iq
* @param data Q%6zr9
* @param l D&fOZVuqZ
* @param i >FeCa hFn
*/ /%g@ ;
private void insertSort(int[] data, int start, int len) { ~vYFQKrb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "C}<umJ'
} 92j[b_P
} (%6fZ
} O}C*weU
} y_:{p5u
tO&n$$
堆排序： "y8W5R5kL4
TTO8tT3[6}
package org.rut.util.algorithm.support; WReHep
%Ja0:e
import org.rut.util.algorithm.SortUtil; &tUX(
2?qT,pN
/** I*3>>VN
* @author treeroot [#!Y7Ede
* @since 2006-2-2 /sYr?b!/<6
* @version 1.0 8}BM`@MG
*/ 1#L%Q(G
public class HeapSort implements SortUtil.Sort{ P:Q&lnC
?* +>T@MH
/* (non-Javadoc) I`+,I`~u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "uplk8iCJ
*/ #y&5pP:@
public void sort(int[] data) { y /vc\e
MaxHeap h=new MaxHeap(); ,OrrGwp&
h.init(data); A#`$#CO
for(int i=0;i h.remove(); Lt~&K$t7~
System.arraycopy(h.queue,1,data,0,data.length); Eg&5tAyM
} (0@b4}Z
I>8_gp\1
private static class MaxHeap{ OeGLMDw
F^.]g@g.|
void init(int[] data){ U `lp56
this.queue=new int[data.length+1]; BW)@.!C
for(int i=0;i queue[++size]=data; X+{brvM<
fixUp(size); C6gp}%
} zv"NbN
} C`ZU.|R
jBEW("4R
private int size=0; o]I8Ghk>/z
Z6b]EcP)#
private int[] queue; D\;5{,:d
}x#e.}hf&
public int get() { JS03BItt
return queue[1]; ?}KD<R
} J>M9t%f@
\>9^(N
public void remove() { l_;6xkv4
SortUtil.swap(queue,1,size--); 3{qB<*!p"G
fixDown(1); "C3J[) qC
} u-jV@Tz
file://fixdown -F(luRBS(W
private void fixDown(int k) { WNeBthq6
int j; *oLDy1<
while ((j = k << 1) <= size) { Y9-F\t=~
if (j < size %26amp;%26amp; queue[j] j++; e1b?TF@lz
if (queue[k]>queue[j]) file://不用交换 yFd.tQs
break; }T PyHq"
SortUtil.swap(queue,j,k); %Cj_z
k = j; `'3&tAy
} =i}lh}(
} 8,F|*YA
private void fixUp(int k) { "3++S
while (k > 1) { GwA\>qXw
int j = k >> 1; \HrtPm`e
if (queue[j]>queue[k]) cBbumf9C
break; -cJ,rrN_9
SortUtil.swap(queue,j,k); |Ch,C
k = j; Ttl m&d+C
} |bQF.n_
} t>a D;|Y
HNc/p4z
} TC2%n\GH*
y5KeUMcu
} RnC+]J+?4
E 6MeM'sx
SortUtil： J8@.qC'!
>\~Er@
package org.rut.util.algorithm; "*`!.9pt
,o0Kevz
import org.rut.util.algorithm.support.BubbleSort; kVCWyZh4
import org.rut.util.algorithm.support.HeapSort; FjizPg/|!
import org.rut.util.algorithm.support.ImprovedMergeSort; >S0kiGDV{
import org.rut.util.algorithm.support.ImprovedQuickSort; /oJ &\pI
import org.rut.util.algorithm.support.InsertSort; FSz<R*2
import org.rut.util.algorithm.support.MergeSort; m8 _yorz
import org.rut.util.algorithm.support.QuickSort; M/lC&F(
import org.rut.util.algorithm.support.SelectionSort; KSS]%66Y
import org.rut.util.algorithm.support.ShellSort; R-<8j`[0
|Vlx:
/** G{,DoCM5WL
* @author treeroot RX_f[
* @since 2006-2-2 ~xDu2-5
* @version 1.0 - q(a~Ge
*/ Yv)c\hm(7j
public class SortUtil { m6^#pqSL
public final static int INSERT = 1; \ntUxPox.
public final static int BUBBLE = 2; [n&ES\o#(
public final static int SELECTION = 3; Zl'/Mxg
public final static int SHELL = 4; h-O;5.m-P
public final static int QUICK = 5; @vib54G
public final static int IMPROVED_QUICK = 6; ?7lW@U0
public final static int MERGE = 7; SHB'g){P
public final static int IMPROVED_MERGE = 8; av5a2r0W1
public final static int HEAP = 9; BHU$QX
/ece}7M
public static void sort(int[] data) { x)N QRd
sort(data, IMPROVED_QUICK); VR1[-OE
} ?F!c"+C
private static String[] name={ &w`DF,k|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q {~$7J
}; ZNDi;6e
m]}U!XT
private static Sort[] impl=new Sort[]{ u>vvW|OB[
new InsertSort(), j+3rS
new BubbleSort(), Z]tQmV8e
new SelectionSort(), Fv)E:PnKC
new ShellSort(), mN.[bz
new QuickSort(), ypGt6t(;
new ImprovedQuickSort(), CCt\[hl
new MergeSort(), <]DUJuF-M
new ImprovedMergeSort(), >!lpI5'Z&
new HeapSort() ]91QZ~4a
}; UU[z\^w| E
&Ruq8n<
public static String toString(int algorithm){ mvTp,^1
return name[algorithm-1]; Jd v;+HN[
} '3sySsD&O
$%'3w~h`
public static void sort(int[] data, int algorithm) { vGPsjxk&
impl[algorithm-1].sort(data); Rrl
} ZQ*Us*9I
;PMh>ZE`
public static interface Sort { D*PEIsV
public void sort(int[] data); m__pQu:
} H[OgnnM
IoK/2Gp
public static void swap(int[] data, int i, int j) { <-N2<sl
int temp = data; P,3w b
data = data[j]; Uey'c1
data[j] = temp; HOCj* O4
} L@zhbWY
} E]m?R 4