[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; ^;ZpK@Luk
} -HGRrWS
int i1=l; 4 .c1
int i2=mid+1; QOK,-
for(int cur=l;cur<=r;cur++){ c $r"q :\
if(i1==mid+1) E[#VWM I
data[cur]=temp[i2++]; ]&H"EHC<$
else if(i2>r) ;%d<Uk?
data[cur]=temp[i1++]; I'BHNZO5tf
else if(temp[i1] data[cur]=temp[i1++]; TrzAgNt
else Io*H}$Gf
data[cur]=temp[i2++]; m#_Rv
} qCI7)L`
} \]4EAKJE
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} 7_PY%4T"
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改进后的归并排序: |pS]zD
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package org.rut.util.algorithm.support; rR":}LA^d
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import org.rut.util.algorithm.SortUtil; )NhC+=N
2~\SUGW-
/** a T(]
* @author treeroot r'yNc&~
* @since 2006-2-2 &k,DAx`rN;
* @version 1.0 ECi;o1hda
*/ 7w2$?k',-
public class ImprovedMergeSort implements SortUtil.Sort { *Sdx:G~gp
N@tKgx
private static final int THRESHOLD = 10; }wRm ~
@gbW:
/* IV!`~\@
* (non-Javadoc) Wcc4/:`Hu
* [uGsF0#e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T8Mqu`$r
*/ c*7|>7C$i
public void sort(int[] data) { ,vmn{gz
int[] temp=new int[data.length]; )bih>>H
mergeSort(data,temp,0,data.length-1); qD*y60~]zz
} p~3x=X4
^%zhj3#
private void mergeSort(int[] data, int[] temp, int l, int r) { 'ux!:b"
int i, j, k; &-qQF`7
int mid = (l + r) / 2; m W>Iib|
if (l == r) i,^3aZwJ'
return; 6\I^]\YO
if ((mid - l) >= THRESHOLD) $adZ|Q\
mergeSort(data, temp, l, mid); B(1-u!pz
else O6/ vFEB
insertSort(data, l, mid - l + 1); q\?p' i
if ((r - mid) > THRESHOLD) ~IW{^u
mergeSort(data, temp, mid + 1, r); p%meuWV%5
else "G%</G8M
insertSort(data, mid + 1, r - mid); w>9d^kU'
vVSDPlN;
for (i = l; i <= mid; i++) { aOd#f:{y
temp = data; <-?C\c~G@
} iii|;v]+
for (j = 1; j <= r - mid; j++) { Z5(9=8hB/
temp[r - j + 1] = data[j + mid]; tnnGM,"ol
} vTx>z\7q,
int a = temp[l]; SWx: -<
int b = temp[r]; nl 'MWP
for (i = l, j = r, k = l; k <= r; k++) { v.<mrI#?
if (a < b) { hT1JEu
data[k] = temp[i++]; 'I/_vqp@
a = temp; [5~mP`He
} else { ";=!PL
data[k] = temp[j--]; DqQp47kp
b = temp[j]; _rB,N#{2R=
} -->0e{y
} CnL=s6XD'
} PlH~um[J
-!_8>r;Q4
/** Kw`CN
* @param data }~+,x#
* @param l #at`7#K@
* @param i T 'c39
*/ B2j1GJEO
private void insertSort(int[] data, int start, int len) { -c]AS[(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9x@|%4Zm"
} ko[w#j
} u*Xp%vNe
} & V>rq'~;
} 1}a4AGAp
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堆排序： vb]kh_
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package org.rut.util.algorithm.support; xA(z/%
lh'S_p8g
import org.rut.util.algorithm.SortUtil; y8s!sO
_xv3UzD
/** exhU!p8
* @author treeroot =w+8q1!o
* @since 2006-2-2 :K^J bQ
* @version 1.0 V2}\]x'1
*/ PhC3F4
public class HeapSort implements SortUtil.Sort{ :CE4< {V
?MRY*[$
/* (non-Javadoc) p}JOiiHa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -%"PqA/1zj
*/ V_gKl;Kfe8
public void sort(int[] data) { 7C7.}U
MaxHeap h=new MaxHeap(); At:8+S<?A
h.init(data); ?'P}ZC8P
for(int i=0;i h.remove(); <r:AJ;
System.arraycopy(h.queue,1,data,0,data.length); B%;MGb o
} c$V5E t
[y@*vQw
private static class MaxHeap{ a,vS{434J
iv$YUM+
void init(int[] data){ +v;z^+
this.queue=new int[data.length+1]; ;WSW&2
for(int i=0;i queue[++size]=data; &t9V
fixUp(size); b&F9<XLqq
} \i_E}Ii0
} .fl r
O,B\|pd2
private int size=0; 95mf
j-ej7
private int[] queue; acl<dY6
DD$>3`
public int get() { W\kli';jyC
return queue[1]; G@H!D[wd
} "9s_[e
V_SH90@)+
public void remove() { z/{X{+Z
SortUtil.swap(queue,1,size--); \nZB@u;S
fixDown(1); 12n:)yQy
} &Pr\n&9A
file://fixdown Zigv;}#
private void fixDown(int k) { [HQ)4xG
int j; *z0d~j*W;
while ((j = k << 1) <= size) { Lg7A[\c ~
if (j < size %26amp;%26amp; queue[j] j++; EhHxB fAQ
if (queue[k]>queue[j]) file://不用交换 en< $.aY
break; {Uw 0zC
SortUtil.swap(queue,j,k); =D/zC'l
k = j; O6;"cUv
} tON>wmN
} sFFQ]ST2p
private void fixUp(int k) { |EE1S{!24m
while (k > 1) { 6^Wep- $
int j = k >> 1; 2cYBm^o|x
if (queue[j]>queue[k]) i 6G40!G=)
break; _!',%+
SortUtil.swap(queue,j,k); YqX$a~
k = j; 4 ThFC
} ~w>h#{RB
} 1Nt &+o
K29/7A/
} C27:tyV
{]^Ixm-,f
} }S/i3$F0~
1]7gYNzV"
SortUtil： ]P?<2,
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package org.rut.util.algorithm; 9wWBE<}>u
$"kPzo~B_
import org.rut.util.algorithm.support.BubbleSort; lME>U_E
import org.rut.util.algorithm.support.HeapSort; T0w_d_aS
import org.rut.util.algorithm.support.ImprovedMergeSort; lxL5Rit@Px
import org.rut.util.algorithm.support.ImprovedQuickSort; KG'i#(u[
import org.rut.util.algorithm.support.InsertSort; ]Btkoad
import org.rut.util.algorithm.support.MergeSort; *HKw;I
import org.rut.util.algorithm.support.QuickSort; >aVgI<
import org.rut.util.algorithm.support.SelectionSort; ]b4IO4T
import org.rut.util.algorithm.support.ShellSort; $,4h\>1WP
(wDE!H7
/** `$T$483/
* @author treeroot I'uwJy_I\
* @since 2006-2-2 Z4] n<~o
* @version 1.0 }g}Eh>U
*/ !a@)6or
public class SortUtil { [C "\]LiX
public final static int INSERT = 1; 3$\k=q3`#
public final static int BUBBLE = 2; W'[V$*
public final static int SELECTION = 3; 'h*jL@%TT
public final static int SHELL = 4; p>B2bv+L
public final static int QUICK = 5; 8 t5kou]h
public final static int IMPROVED_QUICK = 6; 11=$]K>
public final static int MERGE = 7; 'X?xn@?
public final static int IMPROVED_MERGE = 8; jo`ZuN{
public final static int HEAP = 9; _VrY7Mz:r
PXb$]HV
public static void sort(int[] data) { iEvQ4S6tD
sort(data, IMPROVED_QUICK); U[C4!k:0
} Mkz_.;3
private static String[] name={ Lzq/^&sc(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" II\&)_S.4
}; =c[tHf
Y9+_MxC"
private static Sort[] impl=new Sort[]{ S0,\{j
new InsertSort(), HxG8'G
new BubbleSort(), @5%&wC
new SelectionSort(), "7B}hZ^)W
new ShellSort(), ?5C'9 V
new QuickSort(), ]\78(_o.zz
new ImprovedQuickSort(), rJ!cma
new MergeSort(), Z3`EXs
new ImprovedMergeSort(), UnhVppnex
new HeapSort() 3A#Tn7
}; GShxPH{_j
-#|D>
public static String toString(int algorithm){ qA)OkR'm
return name[algorithm-1]; cr1x CPJj
} ?%,NOX
*G19fJ[5
public static void sort(int[] data, int algorithm) { =S&`~+
impl[algorithm-1].sort(data); C?<pD+]b_
} Q.mJ7T~T
fO*jCl
public static interface Sort { q-F K=r 5
public void sort(int[] data); 4qQ,1&!]S
} G7%bY
gYKz,$
public static void swap(int[] data, int i, int j) { 2B,O/3y
int temp = data; ScPVjqG2{
data = data[j]; v,KKn\X
data[j] = temp; AJPvwu}D
} ;P@]7vkff
} b9.M'P\