[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; hwIMn33
} }LijnHH.
int i1=l; Kbb78S30
int i2=mid+1; jvV9eA:zl
for(int cur=l;cur<=r;cur++){ 9gEssTkts
if(i1==mid+1) =pznu+,
data[cur]=temp[i2++]; Z+StB15
else if(i2>r) p!<$vE
data[cur]=temp[i1++]; .LuB\o$
else if(temp[i1] data[cur]=temp[i1++]; bgK<pi)d
else n]u<!.X
data[cur]=temp[i2++]; %T[^D&9$,
} ^+1#[E
} L:k9#6
A,)VM9M_l
} if]Noe
<6G11-K
改进后的归并排序: =Mb1o[
DS%\SrC
package org.rut.util.algorithm.support; 4#'("#R
|/|
import org.rut.util.algorithm.SortUtil; R3!@?mcr
03iv3/{H
/** |P.6<
* @author treeroot B=@ jWz"
* @since 2006-2-2 9P<[7u
* @version 1.0 )Y8",Ig
*/ V&|!RxWK
public class ImprovedMergeSort implements SortUtil.Sort { n 8pt\i0
~-83Q5/[
private static final int THRESHOLD = 10; N<L`c/
tWdhDt8$&
/* wO>L#"X^v
* (non-Javadoc) \@;\t7~
* wfjc/u9W6R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7 ua6l[c
*/ /n4pXT
public void sort(int[] data) { u<n`x6gL
int[] temp=new int[data.length]; Y= 7%+WyD
mergeSort(data,temp,0,data.length-1); lI/0:|l
} =5sF"L;b
}N*>QR5K
private void mergeSort(int[] data, int[] temp, int l, int r) { vwr74A.g0
int i, j, k; Xm4CKuU@
int mid = (l + r) / 2; o_Si mJFK
if (l == r) 2Nj9U#A
return; #2:a[ ~Lf
if ((mid - l) >= THRESHOLD) a?R[J==
mergeSort(data, temp, l, mid); j4R 4H;
else {FI\~q
insertSort(data, l, mid - l + 1); 9Z6C8Jv
if ((r - mid) > THRESHOLD) .!}hhiF,Z
mergeSort(data, temp, mid + 1, r); ~^vC,]hU
else D0;tcm.$
insertSort(data, mid + 1, r - mid); >x[`;O4
ap}5ElMR
for (i = l; i <= mid; i++) { PVao
temp = data; @+_&Y]
} t?^9HP1b_
for (j = 1; j <= r - mid; j++) { 2>\\@1
temp[r - j + 1] = data[j + mid]; y@wF_WX2
} 0v^:
int a = temp[l]; 9zgNjjCl]
int b = temp[r]; XV'fW~j\
for (i = l, j = r, k = l; k <= r; k++) { =w<v3wWN4
if (a < b) { 5% nt0dc
data[k] = temp[i++]; d \>2
a = temp; >m_v5K
} else { yoqa@V
data[k] = temp[j--]; ;5<-)
b = temp[j]; `dJDucD
} S2~@nhO`U(
} |xr32gs
} 'Zk<l#"}
i=v]:TOu
/** U '[?9/T
* @param data ~_!ts{[E
* @param l v9}[$HWx
* @param i ykq'g|
*/ hbuZaxo<
private void insertSort(int[] data, int start, int len) { s0{ NsK>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `HUf v@5
} J-J3=JG
} LD+f'^>>Z
} Kla:e[{
} /BH.>R4`A
8.I9}_
堆排序： /aUFc'5
7unA"9=[4V
package org.rut.util.algorithm.support; Sb^ b)q"
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import org.rut.util.algorithm.SortUtil; p q-!WQ
$ u2Cd4
/** vmKTF!;
* @author treeroot Um ;kd&#x
* @since 2006-2-2 E_[ONm=,
* @version 1.0 - 8syjKTg
*/ 0&`}EXe<f
public class HeapSort implements SortUtil.Sort{ @ t@|q
#J+\DhDEPO
/* (non-Javadoc) *5wv%-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pi%tsKk%
*/ k.Zll,s
public void sort(int[] data) { 'P/taEi=R
MaxHeap h=new MaxHeap(); II#
h.init(data); 9kd.j@C
for(int i=0;i h.remove(); }W "(cYN_
System.arraycopy(h.queue,1,data,0,data.length); 3#9M2O\T
} 7l}~4dm2J
v,\93mNp[
private static class MaxHeap{ $i&\\QNn
zjoo{IH}
void init(int[] data){ JfKg_&hM
this.queue=new int[data.length+1]; zZYHc?Z
for(int i=0;i queue[++size]=data; Ak|b0l>^
fixUp(size); 7Jc<.Z"/Gd
} )tPl<lb
} pU[K%@sC
")\ *2d
private int size=0; l-=e62I{=|
rHo6iJj
private int[] queue; 14u^[M"U
j}RM.C\7
public int get() { 8AX3C s_G
return queue[1]; </hR!Sb]
} >;.*
h~.V[o7=
public void remove() { A xR\ned
SortUtil.swap(queue,1,size--); F$C+R&V_
fixDown(1); .6I%64m
} /]l f>\x1
file://fixdown ;l#?SYY
private void fixDown(int k) { lzI/\%
int j; 0, "ZV}
while ((j = k << 1) <= size) { PJ6$);9}6
if (j < size %26amp;%26amp; queue[j] j++; Z0z)
if (queue[k]>queue[j]) file://不用交换 $WM8tF?H
break; X{|k<^:
SortUtil.swap(queue,j,k); zlN+edgY#,
k = j; z8tt+AU
} Z_!9iA:X
} b__n~\q_
private void fixUp(int k) { ur`V{9g
while (k > 1) { o+R. u}|
int j = k >> 1; _]Z$YM
if (queue[j]>queue[k]) @nW'(x(
break; >0ssza
SortUtil.swap(queue,j,k); \J\vp0[nO}
k = j; W|)(|W
} Ubpg92
} 'fXer!L}
%{c2lyw
} AZ}%MA;q
KS8\F0q
} 78\\8*
`~sf}S :
SortUtil： HL|0d }
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package org.rut.util.algorithm; fdvi}SS8
30e(4@!4vW
import org.rut.util.algorithm.support.BubbleSort; D_]i/ F%
import org.rut.util.algorithm.support.HeapSort; &Qz"nCvJ
import org.rut.util.algorithm.support.ImprovedMergeSort; cM|af#o
import org.rut.util.algorithm.support.ImprovedQuickSort; zX006{vig
import org.rut.util.algorithm.support.InsertSort; %pQdq[J={
import org.rut.util.algorithm.support.MergeSort; \0xzBs1!
import org.rut.util.algorithm.support.QuickSort; <$Xn:B<H
import org.rut.util.algorithm.support.SelectionSort; hnlU,p&y3
import org.rut.util.algorithm.support.ShellSort; tVK?VNW
^2P;CAjj-
/** '&&~IB4ud
* @author treeroot c1=;W$T(s
* @since 2006-2-2 .f[\G*
* @version 1.0 Bx_8@+
*/ X*D5y8<
public class SortUtil { rl_1),J\qG
public final static int INSERT = 1; V~tu<"%
public final static int BUBBLE = 2; K'ed5J
public final static int SELECTION = 3; -#:Y+"'
public final static int SHELL = 4; oQKcGUZ
public final static int QUICK = 5; ,(5dQ`hA0
public final static int IMPROVED_QUICK = 6; 70I4-[/z[d
public final static int MERGE = 7; ~%::r_hQ
public final static int IMPROVED_MERGE = 8; S@l a.0HDA
public final static int HEAP = 9; 'ocwXyP,
#m[w=Pu}
public static void sort(int[] data) { "Hsq<oV8
sort(data, IMPROVED_QUICK); fM zAf3
} C=pPI
private static String[] name={ U(=f5|-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #z1ch,*3;
}; 6='_+{
J,&`iL-
private static Sort[] impl=new Sort[]{ 2Q;Y@%G
new InsertSort(), Jh/M}%@|
new BubbleSort(), 9#.NPfMF
new SelectionSort(), FK/ro91L
new ShellSort(), hBs>2u|z9
new QuickSort(), FcbA)7dD
new ImprovedQuickSort(), jwtXI\@MS
new MergeSort(), :)3$&QdHT
new ImprovedMergeSort(), _tR.RAaa"
new HeapSort() PK|`}z9
}; |] f"j':
f T+n-B
public static String toString(int algorithm){ j#.-MfB
return name[algorithm-1]; K:Xrfn{s
} C.TCDl
R'a5,zEo/
public static void sort(int[] data, int algorithm) { {D_4~heF
impl[algorithm-1].sort(data); ,BN}H-W\2
} Rcm(Y7
h0EGhJs
public static interface Sort { :Y)kKq d
public void sort(int[] data); e7j]BzGvl
} N#6A>
qytGs@p_
public static void swap(int[] data, int i, int j) { -QNMB4
int temp = data; s }R:q
data = data[j]; 7=ga_2
data[j] = temp; JNz"lTt>[g
} p?gLW/n
} <t|9`l_XW