[JAVA]用Java实现的各种排序

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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; *}hx9:9\B
} srbU}u3VZ
int i1=l; E mUA38
int i2=mid+1; =68CR[H
for(int cur=l;cur<=r;cur++){ z,"fr%*,N
if(i1==mid+1) f;[\'_.*
data[cur]=temp[i2++]; "5+x6/9b
else if(i2>r) Z?7XuELKV
data[cur]=temp[i1++]; yJj$iri
else if(temp[i1] data[cur]=temp[i1++]; Vlk]
else gg-4ce/
data[cur]=temp[i2++]; ># {,(8\
} &ZmHR^Flz
} 91 ]"D;NN
V@QWJZ"
} xTy[X"sJ
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改进后的归并排序: @w H+,]xE
VhWF(*
package org.rut.util.algorithm.support; 5V|D%t2N
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import org.rut.util.algorithm.SortUtil; m3cO{ 1I
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/** v7i5R !
* @author treeroot B-@ ]+W
* @since 2006-2-2 /qYo*S_cG
* @version 1.0 ubpVrvu@
*/ w;RG*rv
public class ImprovedMergeSort implements SortUtil.Sort { \sUk71L`j
u;[*Z
private static final int THRESHOLD = 10; 5L'bF2SI
mr`Lxy9e
/* x2^Yvgc-
* (non-Javadoc) Guc~] B
* |m^qA](M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 80p?qe
*/ 8b^v@|)N
public void sort(int[] data) { xS4B"/
int[] temp=new int[data.length]; A 11w{`EM
mergeSort(data,temp,0,data.length-1); 9q##)
} !zd]6YL$
'pJ46"D@m
private void mergeSort(int[] data, int[] temp, int l, int r) { J^Dkx"1GD
int i, j, k; `qNhB\
int mid = (l + r) / 2; VUo7Evc:.P
if (l == r) _o 2pyV&
return; $6(,/}==0
if ((mid - l) >= THRESHOLD) v-V#?+#
mergeSort(data, temp, l, mid); tP?pN]Q$,
else t3~ZGOn
insertSort(data, l, mid - l + 1); <`B4+:;w6
if ((r - mid) > THRESHOLD) |Ew~3-u!
mergeSort(data, temp, mid + 1, r); ^* xhbM;
else I$#B#w?!$r
insertSort(data, mid + 1, r - mid); 0X`sQNx
}\9elVt'2
for (i = l; i <= mid; i++) { Zd~l_V f
temp = data; 3Ishe"
} +}XFkH~
for (j = 1; j <= r - mid; j++) { Ddf7wszW
temp[r - j + 1] = data[j + mid]; [a\U8 w
} .=j]PckJO
int a = temp[l]; y%y F34
int b = temp[r]; 7rc6
for (i = l, j = r, k = l; k <= r; k++) { 4QK~qAi
if (a < b) { 986y\9Zu
data[k] = temp[i++]; "Y9PS_u(~
a = temp; }`O_
} else { cGevFlnh
data[k] = temp[j--]; our$Ka31
b = temp[j]; ~f.fg@v`+v
} B1EI'<S
} DrG9Kky{
} Rmq8lU
X&B2&e;
/** $_j\b4]%
* @param data qdlz#-B
* @param l .,)C^hs@
* @param i Dlc=[kf9
*/ z!z+E%H^
private void insertSort(int[] data, int start, int len) { l>KkK|!T^i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0@FZQ$-
} ewo1^&#>
} 1;; is
} FC'v= *
} dG6 G
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堆排序： >i`V-"x
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package org.rut.util.algorithm.support; J 8/]&Ow
$ BEIG@qG
import org.rut.util.algorithm.SortUtil; e{ce \
EFb1Y{u^\!
/** ,a:!"Z^f
* @author treeroot \S[7-:Lu^
* @since 2006-2-2 E>/kNl
* @version 1.0 .L,xqd[zC
*/ 0i76(2
public class HeapSort implements SortUtil.Sort{ 7J 0=HbH
ZyJdz+L{@V
/* (non-Javadoc) -Y*"!8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iIOA54!o
*/ UStNUNCq
public void sort(int[] data) { fM[Qn*.
MaxHeap h=new MaxHeap(); {uurM`f}:
h.init(data); P1<Y7+n
for(int i=0;i h.remove(); (*.t~6c?5
System.arraycopy(h.queue,1,data,0,data.length); :UjF<V
} &f}a`/{@
uQ^r1 $#
private static class MaxHeap{ -h5yg`+1N\
Q(P'4XCm
void init(int[] data){ q/ x(:yol
this.queue=new int[data.length+1]; z9@Tg=#i
for(int i=0;i queue[++size]=data; $1QQidB
fixUp(size); `MMh"# xN
} #=tWjInm
} &3 QdQn,
QJBzv|
private int size=0; F9hh- "(Z
E0;KTcZi
private int[] queue; kC=e>v
orGNza"A
public int get() { < ag|#
return queue[1]; M;BDo(1
} 9uV'#sR
'baew8Q#
public void remove() { WaU+ZgDrG
SortUtil.swap(queue,1,size--); W`baD!*
fixDown(1); &kR+7
} +*dG'U6
file://fixdown BPp`r_m8w}
private void fixDown(int k) { W/(D"[:l%
int j; 3Un{Q~6h
while ((j = k << 1) <= size) { d$>TC(E=t
if (j < size %26amp;%26amp; queue[j] j++; <kQ 5sG
if (queue[k]>queue[j]) file://不用交换 rJ LlDKP-(
break; }GIwYh/
SortUtil.swap(queue,j,k); UL81x72O
k = j; mv7><C
} OnNWci|7
} #~A(%a
private void fixUp(int k) { KeU|E<|!
while (k > 1) { QvM+]pdR6
int j = k >> 1; kz|2PP
if (queue[j]>queue[k]) 8p4J7 -
break; <a)B5B>
SortUtil.swap(queue,j,k); "}_b,5lkGK
k = j; X^!n'$^u
} {1RI!#[\
} ff.(X!
)E--E+j
} R,mOV8y"W[
Fai_v{&?
} 72hN%l
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SortUtil： oF1{/ERS
Kjw4,z%\94
package org.rut.util.algorithm; ~H[
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import org.rut.util.algorithm.support.BubbleSort; .Dn.|A
import org.rut.util.algorithm.support.HeapSort; pmm?Fq!s=
import org.rut.util.algorithm.support.ImprovedMergeSort; U} EaV<
import org.rut.util.algorithm.support.ImprovedQuickSort; ^Eu]i
import org.rut.util.algorithm.support.InsertSort; ;x 9_
import org.rut.util.algorithm.support.MergeSort; en"]u,!
import org.rut.util.algorithm.support.QuickSort; 6#Ag^A
import org.rut.util.algorithm.support.SelectionSort; (@t O1g
import org.rut.util.algorithm.support.ShellSort; "/ N ?$
R+'$V$g\X
/** w! J|KM
* @author treeroot ET]PF,`
* @since 2006-2-2 6OBe^/ZRt
* @version 1.0 ) >_xHc?
*/ Vu @2
public class SortUtil { &`#k1t'
public final static int INSERT = 1; VrV )qfG
public final static int BUBBLE = 2; -^ )0c
public final static int SELECTION = 3; K gN=b
public final static int SHELL = 4; RrFq"
public final static int QUICK = 5; Rne#z2Ok
public final static int IMPROVED_QUICK = 6; D?+\"lI
public final static int MERGE = 7; XJx$HM&0M
public final static int IMPROVED_MERGE = 8; $uw[X
public final static int HEAP = 9; DtXQLL*fl(
$;kFuJF
public static void sort(int[] data) { fkLI$Cl
sort(data, IMPROVED_QUICK); qOA+ao
} K U 2LJ_~Y
private static String[] name={ s}2TJa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kEQ1&9
}; "4Joou"U
;yfKYN[
private static Sort[] impl=new Sort[]{ ;kSRv=S
new InsertSort(), 3Go/5X/
new BubbleSort(), -s?f<f{
new SelectionSort(), =NHE_4/p
new ShellSort(), C5}c?=#bdf
new QuickSort(), w %4SNR
new ImprovedQuickSort(), 4LG[i}u.N
new MergeSort(), 26SXuFJ@
new ImprovedMergeSort(), $w,?%i97
new HeapSort() -^1}J
}; 8Zj=:;
r7Vt,{4/
public static String toString(int algorithm){ t>hoXn^-
return name[algorithm-1]; 5yOIwzr&Uu
} eAU0 8gM.
to2;. ~X
public static void sort(int[] data, int algorithm) { r]h>Bb
impl[algorithm-1].sort(data); '}4z=f`}
} `IP?w&k)
iA~LH6
public static interface Sort { D4@).%
public void sort(int[] data); r6.`9
} H7`JqS
3,ihVVr&P
public static void swap(int[] data, int i, int j) { TLcev*
int temp = data; #'DrgZ)W
data = data[j]; a0wSXd
data[j] = temp; #$5"&SM
} ;(&$Iw9X
} X8}m %