[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; IfXLnD^||
} fp![Pbms.
int i1=l; dju&Ku
int i2=mid+1; >;3c;nf
for(int cur=l;cur<=r;cur++){ 4QZy-a*tA
if(i1==mid+1) ycAQPz}=I
data[cur]=temp[i2++]; VDmd+bvJV
else if(i2>r) \!V6` @0KC
data[cur]=temp[i1++]; xBG1up<z
else if(temp[i1] data[cur]=temp[i1++]; "\=_- `
else >aWJ+
data[cur]=temp[i2++]; uATBt
} *-Yw0Y[E
} +%Gm2e;_u
gwYd4
} e#OU {2X
[1UqMkXtf
改进后的归并排序: 6kuSkd$.
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package org.rut.util.algorithm.support; !aEp88u
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import org.rut.util.algorithm.SortUtil; zn~m;0Xi
v1lj/A
/** uU\iji\
* @author treeroot &^7)yS+C
* @since 2006-2-2 q%vUEQLBp
* @version 1.0 N+V-V-PVk
*/ H5I#/j
public class ImprovedMergeSort implements SortUtil.Sort { t3XMQ']
zLn#p]
private static final int THRESHOLD = 10; |5/[0V-vy
n{yjH*\Z
/* mHMej@
* (non-Javadoc) vPsX!m[#
* KE3v3g<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U+i[r&{gb
*/ rh l5r"%
public void sort(int[] data) { %%>?<4t
int[] temp=new int[data.length]; Mvh_>-i
mergeSort(data,temp,0,data.length-1); #"M Pe4
} *j* WE\
~GeYB6F
private void mergeSort(int[] data, int[] temp, int l, int r) { ,'673PR
int i, j, k; FS}z_G|4]
int mid = (l + r) / 2; )-{Qa\6(%
if (l == r) %dU}GYL_
return; /YbL{G )j}
if ((mid - l) >= THRESHOLD) eBV{B70k
mergeSort(data, temp, l, mid); 7| T:TbY>
else ^Bb_NcU
insertSort(data, l, mid - l + 1); @6!JW(,]\
if ((r - mid) > THRESHOLD) =KZ4:d5
mergeSort(data, temp, mid + 1, r); Vel;t<1
else /fq6-;co+
insertSort(data, mid + 1, r - mid); PS22$_}
("oA{:@d
for (i = l; i <= mid; i++) { 0R]CI
temp = data; bsry([N>w
} kt#W~n
for (j = 1; j <= r - mid; j++) { h,+=h;!
temp[r - j + 1] = data[j + mid]; z>:7}=H0
} <X |h*
int a = temp[l]; t_rDXhM
int b = temp[r]; c" 7pf T
for (i = l, j = r, k = l; k <= r; k++) { gsp7N
if (a < b) { gNd J=r4
data[k] = temp[i++]; M::iU_
a = temp; "/fs%F
} else { bZXNo
data[k] = temp[j--]; Mg$9'a"[\
b = temp[j]; d/>,U7eS[+
} RX1{?*r]Z
} H=#Jg;_w
} g8"7wf`0k
MGzF+ln^U
/** F/SsiUBS
* @param data RKkI/Z0
* @param l o z{j2%
* @param i He!!oKK>
*/ lKUm_; m
private void insertSort(int[] data, int start, int len) { )^Pvm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /AW>5r]
} -<!17jy
} dt+ 4$
} A'1AU:d
} %i>e
tC:,!4 P$
堆排序： [?@wCY4=
Q'%o;z*
package org.rut.util.algorithm.support; 5Y=\~,%\oH
t=rAcyNM
import org.rut.util.algorithm.SortUtil; U/!&KsnT
~<- ci
/** !muYn-4M
* @author treeroot >Ryss@o
* @since 2006-2-2 v-fi9$#^
* @version 1.0 o`mIi
*/ hO.G'q$V
public class HeapSort implements SortUtil.Sort{ qd~98FS
8]":[s6x
/* (non-Javadoc) <>i+R#u{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n qLAby_
*/ -5v.1y=!L
public void sort(int[] data) { gQ=POJ=G
MaxHeap h=new MaxHeap(); S<!_ uq
h.init(data); Au} ;z6k
for(int i=0;i h.remove(); ^;$a_$|
System.arraycopy(h.queue,1,data,0,data.length); ]Y&)98
} |;9 A{#zM
_G[I2]
private static class MaxHeap{ *;e@t4
;c- ]bhBB
void init(int[] data){ 2{B(j&{
this.queue=new int[data.length+1]; ]p&<nK,
for(int i=0;i queue[++size]=data; Jrd4a~XP
fixUp(size); Vt=(2d5:p
} (F[/~~
} V9j1j} r
A1QI4.K
private int size=0; 3E}NiD\V}
j8Q5d`
private int[] queue; E<CxKY9
9jR[:[
public int get() { 8$v zpu
return queue[1]; /;NE]{K
} Bd9hf`%2
%7>AcTN~
public void remove() { 3V Mh)
SortUtil.swap(queue,1,size--); CQjZAv
fixDown(1); r7"Au"
} dH2]ZE0V
file://fixdown gO:Z6}3vM
private void fixDown(int k) { 'uf2 nUo
int j; [j}7@Mr`\
while ((j = k << 1) <= size) { *rn]/w8ZW
if (j < size %26amp;%26amp; queue[j] j++; }d~wDg<#
if (queue[k]>queue[j]) file://不用交换 '"w}gx
break; c@9Z&2)
SortUtil.swap(queue,j,k); x, Vh
k = j; 4Wla&yy
} 1Y"35)CR)
} =Esbeb7P
private void fixUp(int k) { nl'J.dJe
while (k > 1) { yMbcFDlBr
int j = k >> 1; <Hh5u~
if (queue[j]>queue[k]) ;4kx>x*H
break; 2rO)qjiH
SortUtil.swap(queue,j,k); M*O(+EM
k = j; IQw %|^
} 974eY
} PPCTc|G
Q&upxE4-~
} <DXmZ1
D#d8^U
} tCbr<Ug
VPM|Rj:d
SortUtil： +#*&XX5A#?
kQwm"Z
package org.rut.util.algorithm; +2EHmuJ;
~TG39*m
import org.rut.util.algorithm.support.BubbleSort; r}R^<y@I
import org.rut.util.algorithm.support.HeapSort; E#<7\p>
import org.rut.util.algorithm.support.ImprovedMergeSort; EvqUNnjR
import org.rut.util.algorithm.support.ImprovedQuickSort; 18.Y/nZAgQ
import org.rut.util.algorithm.support.InsertSort; f^!11/Wv
import org.rut.util.algorithm.support.MergeSort; Yz2{LW[K
import org.rut.util.algorithm.support.QuickSort; BZJKiiD
import org.rut.util.algorithm.support.SelectionSort; C!7U<rI
import org.rut.util.algorithm.support.ShellSort; @1<omsl
#.)xm(Ys
/** T/wM(pr'
* @author treeroot Mu'^OX82
* @since 2006-2-2 +MNSZLP]
* @version 1.0 tg7C;rJ
*/ {5QosC+o6Q
public class SortUtil { H}h~~7E
public final static int INSERT = 1; 0 OAqA?Z
public final static int BUBBLE = 2; M)"]$TM
public final static int SELECTION = 3; !K3i-zY
public final static int SHELL = 4; DYo<5^0
public final static int QUICK = 5; wi\z>'R
public final static int IMPROVED_QUICK = 6; Y_[g_
public final static int MERGE = 7; 068WlF cWV
public final static int IMPROVED_MERGE = 8; y _'eyR@)
public final static int HEAP = 9; C~ZE95g
3VcT7y*{P
public static void sort(int[] data) { $R%+*
sort(data, IMPROVED_QUICK); U_x0KIm
} "JzfL(yt
private static String[] name={ /&D'V_Q`*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v#<\:|XAg
}; 2q"_^deI5*
=MTj4VXh"
private static Sort[] impl=new Sort[]{ <#xrrRhm}
new InsertSort(), R=\v3m
new BubbleSort(), ]`zjRRd
new SelectionSort(), b A)b`1lI
new ShellSort(), >.J'L5 x$
new QuickSort(), W[R]^2QAG
new ImprovedQuickSort(), $zC6(C(l
new MergeSort(), csK>iN
new ImprovedMergeSort(), UvPp~N7,
new HeapSort() gf0PMc3l
}; /:#j?c
PM~bM3Ei
public static String toString(int algorithm){ W *YW6
return name[algorithm-1]; j6n2dMRvSE
} #"Fg%36Zd
99F>n[5
public static void sort(int[] data, int algorithm) { 4@DVc7\x$
impl[algorithm-1].sort(data); D^,\cZbY
} M'\pkzx
CxJfrI_W
public static interface Sort { pNp^q/-yB
public void sort(int[] data); T?H\&2CLT
} ZJ^s}
0SJ{@*
public static void swap(int[] data, int i, int j) { 7'_nc!ME
int temp = data; Sdgb#?MR|
data = data[j]; %S{o5txo
data[j] = temp; :~t<L%tYF
} qPsyqn?Y|
} d4d\0[