[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; *>,#'C2
} 17ol %3 M
int i1=l; p02E:?
int i2=mid+1; gNaB^IY
for(int cur=l;cur<=r;cur++){ nl/~7({
if(i1==mid+1) #HyE-|_C
data[cur]=temp[i2++]; mGC!7^_D`
else if(i2>r) grZ?F~P8
data[cur]=temp[i1++]; 1=Y pNXX
else if(temp[i1] data[cur]=temp[i1++]; ZQN%!2
else /DxeG'O
data[cur]=temp[i2++]; ,b'QL6>`
} (&@,ZI;
} =2&Sw(6j
Y q(CD!
} %<yH6h*u
yr[HuwU
改进后的归并排序: sA:k8aj
M|9=B<6`7
package org.rut.util.algorithm.support; k3VRa|Y")
vE$n0bL2
import org.rut.util.algorithm.SortUtil; .]y"04@]
8=DZ;]XD.
/** Y<)9TU:D!
* @author treeroot "3e1 7dsY
* @since 2006-2-2 `S:LuU8e
* @version 1.0 <-s5 ;xwtS
*/ ~7O.}RP0
public class ImprovedMergeSort implements SortUtil.Sort { 2|:x_rcj
/;V:<mekf
private static final int THRESHOLD = 10; r NT>{
V:>ZSW4,^
/* h%+6y
* (non-Javadoc) %=<Kb\
* .yN.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *]+5T-R% $
*/ 9 6j*F,{
public void sort(int[] data) { mj|TWDcj+
int[] temp=new int[data.length]; *jrQ-'<T
mergeSort(data,temp,0,data.length-1); %?i~`0-:n%
} AB[#
zPW_
private void mergeSort(int[] data, int[] temp, int l, int r) { 0;n}{26a
int i, j, k; =P7!6V\f
int mid = (l + r) / 2; 9Pjw<xt
if (l == r) :7DXLI|L#?
return; 2NvbQ 3c5
if ((mid - l) >= THRESHOLD) &+Yoob]P
mergeSort(data, temp, l, mid); Uk<2XGj
else 0.!!rq,
insertSort(data, l, mid - l + 1); /;9iDjG
if ((r - mid) > THRESHOLD) U%H6jVE
mergeSort(data, temp, mid + 1, r); {"n=t`E)3
else uraT$Q}
insertSort(data, mid + 1, r - mid); C)qy=lx%
AH'4k(-
for (i = l; i <= mid; i++) { NjP7?nXSx
temp = data; ZJ'Tb<fP
} MVXy)9q
for (j = 1; j <= r - mid; j++) { :WHbwu,L$
temp[r - j + 1] = data[j + mid]; G*'1[Bu
} %mr6p}E|
int a = temp[l]; |Wz`#<t
int b = temp[r]; -EIfuh
for (i = l, j = r, k = l; k <= r; k++) { /@feY?glc
if (a < b) { ' i<}/l
data[k] = temp[i++]; p$_X\,F
a = temp; CA5q(ID_
} else { ;'P<#hM[$
data[k] = temp[j--]; o*Kl`3=]
b = temp[j]; 'RzzLk|$
} }4XXNYH
} Xot2L{EIUE
} ,*j@Zb_r
gSt'<v
/** B0$.oavC
* @param data m(p0)X),_i
* @param l m 7/b.B}
* @param i _ Y8jl,J
*/ .$N8cYu0
private void insertSort(int[] data, int start, int len) { [E6ZmMB&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CN!~(1v
} dO|n[/qL0
} ,@r 0-gL
} NK$BF(HBi
} KvkU]s_
H-5h-p k
堆排序： v%!'vhf_K
x}X hL
package org.rut.util.algorithm.support; b2G1@f.U
Zil<*(kv{
import org.rut.util.algorithm.SortUtil; <)VNEy'
8Y&_X0T|
/** =}m'qy
* @author treeroot )bR`uV9<
* @since 2006-2-2 RE.t<VasP
* @version 1.0 ]D&\|,,(
*/ #s3R4@{
public class HeapSort implements SortUtil.Sort{ gN5;Uk
JHCXUT-r{
/* (non-Javadoc) VGeyZ\vU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'NSfGC%7R
*/ 734<X6^1
public void sort(int[] data) { /MV2#P@
MaxHeap h=new MaxHeap(); f/UIpswrZ'
h.init(data); R&FO-{S
for(int i=0;i h.remove(); Twq,6X-
System.arraycopy(h.queue,1,data,0,data.length); !1[ZfTX^a
} )UN_,'H/V
$3yn-'o'A
private static class MaxHeap{ NEff`mwm5)
Da&Brm
void init(int[] data){ !(#d7R
this.queue=new int[data.length+1]; RLR\*dL1
for(int i=0;i queue[++size]=data; UthM?g^
fixUp(size); )8 %lZ{
} ;(Kj-,>
} {\ ]KYI0
8<PQ31
private int size=0; &*9' 0
qX:YI3:,@
private int[] queue; y!/:1BHlm
E3QyiW
public int get() { L)9uBdF
return queue[1]; Fr)6<9%xVm
} @H61^K<
aqKrf(Rv
public void remove() { !;E{D
SortUtil.swap(queue,1,size--); m\@q2l-
fixDown(1); h1Logm+m
} ChRCsu~
file://fixdown L^e%oQ>s
private void fixDown(int k) { ~$]Puv1V>
int j; u$ff %`E
while ((j = k << 1) <= size) { 8DcIM(;Z
if (j < size %26amp;%26amp; queue[j] j++; A}G>JL
if (queue[k]>queue[j]) file://不用交换 e~PAi8B5
break; O]80";Uv
SortUtil.swap(queue,j,k); }T&~DVM
k = j; XU6SYC"t%~
} 'pC51}[A{^
} Hgbrlh
private void fixUp(int k) { 1-}M5]Y
while (k > 1) { #BwOWra
int j = k >> 1; H&uh$y@
if (queue[j]>queue[k]) \ k &ZA
break; %6E:SI4
SortUtil.swap(queue,j,k); |Fe*t
k = j; N7-LgP
} <F?UdMT4y
} ]:.9:RmEV
csj4?]gI
} M"5S
1;JH0~403
} jPEOp#C
X1o=rT
SortUtil： }xpo@(e
q@XxCP]
package org.rut.util.algorithm; V=)' CCi{
%a|m[6+O
import org.rut.util.algorithm.support.BubbleSort; $PFE>=nM
import org.rut.util.algorithm.support.HeapSort; zj2l&)N
import org.rut.util.algorithm.support.ImprovedMergeSort; wVkRrFJ
import org.rut.util.algorithm.support.ImprovedQuickSort; VF:95F;@
import org.rut.util.algorithm.support.InsertSort; `Hd~H
import org.rut.util.algorithm.support.MergeSort; ?xw0kXK4
import org.rut.util.algorithm.support.QuickSort; fr<V])
import org.rut.util.algorithm.support.SelectionSort; g[(Eh?]Sc
import org.rut.util.algorithm.support.ShellSort; o ^""=Z
S^A+Km3VB
/** b)7v-1N
* @author treeroot Z4369
* @since 2006-2-2 h@fF`
* @version 1.0 t(p}0}Pp
*/ oW3|b2D
public class SortUtil { gbziEjRe
public final static int INSERT = 1; PLRMW2
public final static int BUBBLE = 2; t^"8 v3'h
public final static int SELECTION = 3; |f2bb
public final static int SHELL = 4; Z+2 j(
public final static int QUICK = 5; ?<1~KLPMhY
public final static int IMPROVED_QUICK = 6; o8fY!C)
public final static int MERGE = 7; |"YE_aYu
public final static int IMPROVED_MERGE = 8; 9*2^2GR^;
public final static int HEAP = 9; *+_+ZDU
Lmw4
public static void sort(int[] data) { sPvjJr"s
sort(data, IMPROVED_QUICK); Y{9xF8#
} , FR/X/8
private static String[] name={ </D )i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f7:}t+d
}; iJS7g
f0 kz:sZ9
private static Sort[] impl=new Sort[]{ _ O;R
new InsertSort(), Xo3@-D_c!c
new BubbleSort(), .+&M,% x
new SelectionSort(), sBLOrbo
new ShellSort(), Dq+S'x~>
new QuickSort(), vQy+^deW
new ImprovedQuickSort(), :M8y 2fh
new MergeSort(), #'BPW<Ob
new ImprovedMergeSort(), ;*cCaB0u
new HeapSort() mI5!rrRD|
}; .yB{+
.JV y}^Q\
public static String toString(int algorithm){ 'oF XNO
return name[algorithm-1]; [F 24xC+
} r9n:[A&HE
!V-(K_\t
public static void sort(int[] data, int algorithm) { eIQ@){lJ-]
impl[algorithm-1].sort(data); @a,}k<@E
} +*wr=9>
6pbtE]
public static interface Sort { l OiZ2_2
public void sort(int[] data); p3V?n[/}
} N v6=[_D
$hy0U_}6
public static void swap(int[] data, int i, int j) { "(Nt9K%P)
int temp = data; m .R**g
data = data[j]; Z1{>"o:@
data[j] = temp; 1rON8=E
} mDO! o
} 8`_tnARIX