[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; C40o_1g
} 8Y/1+-
int i1=l; %m-U:H.Vp
int i2=mid+1; 8;x0U`}Ez(
for(int cur=l;cur<=r;cur++){ HmbQL2
if(i1==mid+1) $#E!/vVwD7
data[cur]=temp[i2++]; N{uVh;_
else if(i2>r) ipS:)4QFxJ
data[cur]=temp[i1++]; -[[(Zx
else if(temp[i1] data[cur]=temp[i1++]; zxeT{AFPr?
else wJh/tb=$o
data[cur]=temp[i2++]; ?HeUU
} <,y> W!
} es<
TrBW0Bn>p
} U|x#'jGo'
H^M>(kT#&
改进后的归并排序: Cl!9/l?z
mB"1QtD
package org.rut.util.algorithm.support; 1o?uf,H7O
;*WG9Y(W
import org.rut.util.algorithm.SortUtil; -! ^D8^s
rl]K:8*
/** e/}4Pt
* @author treeroot 5t-,5
* @since 2006-2-2 S:1g(f*85
* @version 1.0 ,(NN)Oj
*/ h=B= J
public class ImprovedMergeSort implements SortUtil.Sort { \}_,g
-B?cF9
private static final int THRESHOLD = 10; aP#/%
\J;_%-Z
/* I:("f+ H
* (non-Javadoc) DKF '*
* 5<YL^m{/L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tTWEhHQ`
*/ ;*0?C'h=
public void sort(int[] data) { !@ {sM6U
int[] temp=new int[data.length]; -F MonM
mergeSort(data,temp,0,data.length-1); fg4mP_
} U*?`tdXJ$
%*#+(A"V
private void mergeSort(int[] data, int[] temp, int l, int r) { `@#rAW D
int i, j, k; b7B|$T,
int mid = (l + r) / 2; YLuf2ja}X
if (l == r) ',/2J0_
return; 2OQ\ z;s
if ((mid - l) >= THRESHOLD) |#'n VN.;
mergeSort(data, temp, l, mid); kT:I.,N
else nu(7YYCM$
insertSort(data, l, mid - l + 1); o=Y'ns^a(
if ((r - mid) > THRESHOLD) JfmYr47Pv
mergeSort(data, temp, mid + 1, r); W2'!Pc,W
else Fm*npK
insertSort(data, mid + 1, r - mid); QNH3\<IS
z"Mk(d@-E
for (i = l; i <= mid; i++) { [v\m)5
temp = data; <~uzKs0
} Q!_d6-*u
for (j = 1; j <= r - mid; j++) { (>NZYPw^3
temp[r - j + 1] = data[j + mid]; 4]6-)RHFB
} +}PN+:yV
int a = temp[l]; Je}0KW3G9L
int b = temp[r]; +wxsAGy_j
for (i = l, j = r, k = l; k <= r; k++) { c94=>p6
if (a < b) { p}<60O"r$
data[k] = temp[i++]; o4wSt6gBcJ
a = temp; jcb&h@T8kv
} else { |gIE$rt-~W
data[k] = temp[j--]; O8SE)R~
b = temp[j]; _ j`tR:
} SZ}=~yoD(
} k81%$E
} 5DVYHN9c|
b` va\'&3
/** ~]q>}/&YLo
* @param data e['<.Yf+
* @param l "c|Rpzs[
* @param i 5~j#Z (}u
*/ A\#z<h[>
private void insertSort(int[] data, int start, int len) { gY8$Rk %
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~clX2U8u`
} s^K2,D]P
} AI`k }sA~
} &{UqGD#1&
} r$8'1s37`
P=_fYA3
堆排序： /KNDo^P
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package org.rut.util.algorithm.support; ,Aai-AGG@
dvU{U@:sz
import org.rut.util.algorithm.SortUtil; {_/o' 6
/;Hr{f jl{
/** _TGs .t
* @author treeroot k5Fj"U
* @since 2006-2-2 igW* {)h3
* @version 1.0 -%@ah:iJ
*/ 5doi4b>]!
public class HeapSort implements SortUtil.Sort{ {ywwJ
wjD<"p;P
/* (non-Javadoc) +`_0tM1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oQObr
*/ O9ps?{g
public void sort(int[] data) { 40pz<-B
MaxHeap h=new MaxHeap(); J=k=cFUX
h.init(data); "RN] @p#m
for(int i=0;i h.remove(); 8-Y*b89
System.arraycopy(h.queue,1,data,0,data.length); L!lmy&1
} N2"B\
]%FAJ\
private static class MaxHeap{ ;RRw-|/Wm
zQG{j\
void init(int[] data){ zX4RqI
this.queue=new int[data.length+1]; N+@ Ff3M
for(int i=0;i queue[++size]=data; 6-fv<Pn
fixUp(size); w.a9}GC
} ?5J#
} KE@+I.x
5a$EXV
private int size=0; V`1{*PrI@L
7XK0vKmW3
private int[] queue; !Yv_V]u=
UaF~[toX
public int get() { {MSE}|A\V
return queue[1]; ]i$0s
} !@F {FR
f|FS%]fCxk
public void remove() { t4[q:[1
SortUtil.swap(queue,1,size--); ]JYE#F
fixDown(1); ,>h"~X
} o+'|j#P
file://fixdown 5P%#5Yr2
private void fixDown(int k) { +tT"
int j; rR-[CT
while ((j = k << 1) <= size) { Q(nTL WW
if (j < size %26amp;%26amp; queue[j] j++; q.`<q
if (queue[k]>queue[j]) file://不用交换 G rp{ .
break; >kK@tJn
SortUtil.swap(queue,j,k); ZBK0`7#&EH
k = j; H3<tsK=:
} 8O9^g4?
} +w^,!gA&
private void fixUp(int k) { lAP k/G
while (k > 1) { U?le|tK
int j = k >> 1; -smN}*3[
if (queue[j]>queue[k]) 0Eb4wupo
break; mn?F;=qE
SortUtil.swap(queue,j,k); 3ai[ r
k = j; `\62 iUN
} L)J1yw
} f7~dn#<@
'E3T fM
} 1vj@qw3
rs{)4.I
} Sk cK>i.[
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SortUtil： tr[}F7n9
!q\=e@j-i
package org.rut.util.algorithm; .EL3}6"A
.iRKuBM/
import org.rut.util.algorithm.support.BubbleSort; +ig%_QED[\
import org.rut.util.algorithm.support.HeapSort; Lc{arhN
import org.rut.util.algorithm.support.ImprovedMergeSort; @"MYq#2c$
import org.rut.util.algorithm.support.ImprovedQuickSort; M/=36{,w-
import org.rut.util.algorithm.support.InsertSort; ,r w4Lo
import org.rut.util.algorithm.support.MergeSort; k8+J7(_c
import org.rut.util.algorithm.support.QuickSort; hhy+bA}
import org.rut.util.algorithm.support.SelectionSort; id1cZig
import org.rut.util.algorithm.support.ShellSort; |VWT4*K
m6ge %
/** w5HIR/kP
* @author treeroot m7'<k1#"Y
* @since 2006-2-2 n9+33^ PT
* @version 1.0 ?l/6DT>e
*/ Q:(mK* _
public class SortUtil { W/!P1M n
public final static int INSERT = 1; djOjd,
public final static int BUBBLE = 2; 3y}E*QE
public final static int SELECTION = 3; d^aVP
public final static int SHELL = 4; P[ :_"4U
public final static int QUICK = 5; .P)lQk\
public final static int IMPROVED_QUICK = 6; ~DInd-<5
public final static int MERGE = 7; o:AfEoH"~
public final static int IMPROVED_MERGE = 8; %;k Hnl
public final static int HEAP = 9; eUA]OF@
>o?v[:u*
public static void sort(int[] data) { 4f[%Bb
sort(data, IMPROVED_QUICK); 1l$Ei,9
} >9&31wA_
private static String[] name={ u[b |QR=5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (4+P7Z,Nc
}; E{|B&6$[}
H`CID*Ji
private static Sort[] impl=new Sort[]{ V%oZT>T3
new InsertSort(), 0hemXvv1
new BubbleSort(), 5[ zN M
new SelectionSort(), M,]|L ch
new ShellSort(), k."p&
new QuickSort(), \~ D(ww
new ImprovedQuickSort(), d&j
new MergeSort(), ukSv70Ev
new ImprovedMergeSort(), Jp=fLo 9
new HeapSort() xQu|D>kv87
}; p@Y=6Bw
'E_~|C
public static String toString(int algorithm){ ':vZ&
return name[algorithm-1]; QhZg{v[d
} vV}w>Ap[
k8w\d+!v
public static void sort(int[] data, int algorithm) { 8z#Qp(he
impl[algorithm-1].sort(data); ODxZO3
} WTfjn|a
m\`>N_4*9
public static interface Sort { e2O6q05 ?Q
public void sort(int[] data); WA`A/`taT
} :-1|dE)U
R/hIXO
public static void swap(int[] data, int i, int j) { ~lw9sm*2v2
int temp = data; *S.U8;*Xj
data = data[j]; JXB)'d0
data[j] = temp; w>%@Ug["
} wh8';LZ>R
} S[Du >