[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; 8ip7^
} 5MTgK=c
int i1=l; )+y G+
int i2=mid+1; D>L2o88
for(int cur=l;cur<=r;cur++){ A?!I/|E^;
if(i1==mid+1) 7Ey#u4Q
data[cur]=temp[i2++]; !eR3@%4
else if(i2>r) S0/usC[r
data[cur]=temp[i1++]; \YJy#2K
else if(temp[i1] data[cur]=temp[i1++]; P,pnga3Wu
else H!IshZfktn
data[cur]=temp[i2++]; 2C^B_FUg|]
} LE^G&<!
} [s1pM1x
0'Z\O
} SkNre$>t{
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改进后的归并排序: 1^J`1
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package org.rut.util.algorithm.support; ^)yTBn,
G* b2,9&F
import org.rut.util.algorithm.SortUtil; yBed kj
we7c`1E
/** .aOnGp
* @author treeroot {i~8 :
* @since 2006-2-2 )vB2!H/
* @version 1.0 y %8op:'
*/ H5>hx{
public class ImprovedMergeSort implements SortUtil.Sort { / jTT5
:6kjEI
private static final int THRESHOLD = 10; h~Q)Uy5N(D
>-<8N-@"n
/* R>@uY(>dJ
* (non-Javadoc) WP**a Bp
* Q/>L_S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2GmpCy`L"
*/ mY!iu(R1
public void sort(int[] data) { ?dZt[vAMn
int[] temp=new int[data.length]; 9 t n!t
mergeSort(data,temp,0,data.length-1); ;,'igdold
} X~.f7Ao[
~3h-jK?
private void mergeSort(int[] data, int[] temp, int l, int r) { {NM+Oj,~'
int i, j, k; KGHq rc
int mid = (l + r) / 2; `em9T oJV
if (l == r) SF]@|
return; 1M3%fW
if ((mid - l) >= THRESHOLD) U_yE&6 T
mergeSort(data, temp, l, mid); 7EhN u@5-
else N)8HR9[!
insertSort(data, l, mid - l + 1); 8G%yB}pa
if ((r - mid) > THRESHOLD) )x,8D ~p'
mergeSort(data, temp, mid + 1, r); O{z}8&oR:
else n";02?@F
insertSort(data, mid + 1, r - mid); ,"}Rg1\4t
*~$~yM/~3U
for (i = l; i <= mid; i++) { { >{B`e`$
temp = data; ) iQ
} 5x2Ay=s
for (j = 1; j <= r - mid; j++) { ~q +[<xR\
temp[r - j + 1] = data[j + mid]; *v%rMU7,
} L *[K>iW
int a = temp[l]; wRNroQ
int b = temp[r]; =dP{Gh
for (i = l, j = r, k = l; k <= r; k++) { c>bq%}
if (a < b) { TB6m0qX(
data[k] = temp[i++]; >"3>s%
a = temp; #Sg\q8(O
} else { L?&'xzt B
data[k] = temp[j--]; ni&*E~a
b = temp[j]; 6X g]/FD
} }*U[>Z-eO
} 2Nc>6
} -5G)?J/*
96Wp!]*
/** =;~I_)Pg1
* @param data 1{"llD
* @param l ?z-}>$I;
* @param i ^>4o$}
*/ OvL\u{(<F
private void insertSort(int[] data, int start, int len) { %rKK[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o@>? *=
} tS# `.F~y
} 5 +9Ze9
} :bU(S<%M
} Ac k}QzXO
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堆排序： u?+bW-D'd
Wa/g`}
package org.rut.util.algorithm.support; 3M*Bwt;F_
}w-wSkl1
import org.rut.util.algorithm.SortUtil; 4_M>OD/"
$9 p!Y}
/** &(rWwOo6
* @author treeroot ri~<~oB2:
* @since 2006-2-2 1r[@(c0
* @version 1.0 m8]?hJY3l
*/ 92W&x'
public class HeapSort implements SortUtil.Sort{ z T%U!jqI
g{s'GyV8t
/* (non-Javadoc) FXKF\1`(H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "HMP$)d
*/ G*[P<<je_
public void sort(int[] data) { $e%2t^ i.g
MaxHeap h=new MaxHeap(); |V[9}E: h
h.init(data); [K~]&
for(int i=0;i h.remove(); 3-s}6<0v1
System.arraycopy(h.queue,1,data,0,data.length); 9W*+SlH@!
} 6Q|k7*,B
$*[{J+t_
private static class MaxHeap{ dBCbL.!
)+I.|5g
void init(int[] data){ ZBD;a;wx
this.queue=new int[data.length+1]; R_P}~l
for(int i=0;i queue[++size]=data; &Jc_Fc(M
fixUp(size); -XoPia2
} pI`?(5iK6|
} ~.Ik#At
G* %t'jX9
private int size=0; |Q~cX!;
6bc337b
private int[] queue; 1a0kfM$
UsVMoX^
public int get() { #eP LOR&q
return queue[1]; 2B~wHv
} lkIn%=Z
z5\;OLJS,
public void remove() { `XTh1Z\
SortUtil.swap(queue,1,size--); Upl6:xYrG
fixDown(1); |rRO@18dA
} OY-w?'p?W
file://fixdown 6+rlXmd
private void fixDown(int k) { F^aR+m
int j; 4] > ]-b
while ((j = k << 1) <= size) { |C \}P
if (j < size %26amp;%26amp; queue[j] j++; 4fV3Ear=j
if (queue[k]>queue[j]) file://不用交换 $ 0|a;
break; U09.Y
SortUtil.swap(queue,j,k); q=HHNjj8
k = j; +H/jK@
} 7"X>?@
} n]W_e
private void fixUp(int k) { K?x,T8<aW
while (k > 1) { SM0M%
int j = k >> 1; 5`/@N{e
if (queue[j]>queue[k]) .@ C{3$,VG
break; UUo;`rkT
SortUtil.swap(queue,j,k); ',7??Q7j&v
k = j; ?VU(Pq*`
} oj,lz?
} FX<b:#
}!#gu3
} W" "*ASi
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} u),Qa=Wp
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SortUtil： YKZrEP4^
7)rWw<mY
package org.rut.util.algorithm; l7(!`NPbC
!33#. @[
import org.rut.util.algorithm.support.BubbleSort; gCd`pi 8
import org.rut.util.algorithm.support.HeapSort; bSwWszd~
import org.rut.util.algorithm.support.ImprovedMergeSort; ({0)@+V8
import org.rut.util.algorithm.support.ImprovedQuickSort; v<\A%
import org.rut.util.algorithm.support.InsertSort; " }gVAAvc7
import org.rut.util.algorithm.support.MergeSort; q}uHFp/J
import org.rut.util.algorithm.support.QuickSort; W_O)~u8
import org.rut.util.algorithm.support.SelectionSort; a\uie$"cr]
import org.rut.util.algorithm.support.ShellSort; /T^ JS
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/** Hk_y/97OO
* @author treeroot v}G]X Z8
* @since 2006-2-2 z7.|fE)<6
* @version 1.0 _?7#MWe&
*/ C9n}6Er=,
public class SortUtil { :A46~UA!$
public final static int INSERT = 1; :^ i9]
public final static int BUBBLE = 2; pqM~l&
public final static int SELECTION = 3; jkAAqRR
public final static int SHELL = 4; d<w~jP\
public final static int QUICK = 5; (fD ;g9
public final static int IMPROVED_QUICK = 6; 'J*<iA*W
public final static int MERGE = 7; BIaDY<j90
public final static int IMPROVED_MERGE = 8; h.rD}N\L
public final static int HEAP = 9; I0AJY )R
fqz28aHh
public static void sort(int[] data) { Oh.ZPG=
sort(data, IMPROVED_QUICK); *x~xWg9^
} 1RLY $M
private static String[] name={ WlB'YL-`g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;P&y,:<m:
}; $ZPX]2D4B#
;wiao(t>4N
private static Sort[] impl=new Sort[]{ `?*%$>W#"
new InsertSort(), I|oT0y&
new BubbleSort(), V=I"-k}RL
new SelectionSort(), <q)4la
new ShellSort(), E9j+o y
new QuickSort(), T&Xl'=/
new ImprovedQuickSort(), >>l`,+y
new MergeSort(), uD_v!
new ImprovedMergeSort(), %x;x_
new HeapSort() =M6[URZ
}; r#PMy$7L
_eSdnHWx
public static String toString(int algorithm){ LVIAF0kX
return name[algorithm-1]; U8#xgz@
} &ej8mq"\
3>ex5
public static void sort(int[] data, int algorithm) { Z.L?1V8Q1
impl[algorithm-1].sort(data); foF19_2 ,
} 4!62/df
Gz I~TWc+G
public static interface Sort { vq*Q.0M+
public void sort(int[] data); djQv[Vc{
} ]e:/"
E! /[gZ
public static void swap(int[] data, int i, int j) { QR?yG+VU
int temp = data; )CPM7>
data = data[j]; idc`p?XP
data[j] = temp; _Jz8{` "
} aeyNdMk-
} D'<VYl"/