[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; \qvaE+
} u}bf-;R
int i1=l; ow=UtA-^O
int i2=mid+1; q}BzyC=:n
for(int cur=l;cur<=r;cur++){ gnp~OVDqfL
if(i1==mid+1) ^[-el=oKn0
data[cur]=temp[i2++]; ;8S/6FI
else if(i2>r) >N\0"F7.
data[cur]=temp[i1++]; &M/0g]4p
else if(temp[i1] data[cur]=temp[i1++]; kU-t7'?4
else w6dFb6~R
data[cur]=temp[i2++]; 9vNkZ-1
} + 1IQYa|
} FOwDp0
(R~]|?:wt
} e6B{QP#jq
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改进后的归并排序: kPBV6+d~
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package org.rut.util.algorithm.support; Xd E`d.
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import org.rut.util.algorithm.SortUtil; Hd7,ZHj3^
I2$T"K:eo
/** $GQ`clj<
* @author treeroot lDC$F N
* @since 2006-2-2 <WXzh5D2
* @version 1.0 +(D$9{y
*/ "1q>At
public class ImprovedMergeSort implements SortUtil.Sort { :f5s4N
zOEY6lAwI
private static final int THRESHOLD = 10; "TV(H+1,z
!J*,)kRN
/* {HC@u{K-
* (non-Javadoc) E Uar/
* wfL-oi'5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8E&XbqP+
*/ rdnno
public void sort(int[] data) { U`Jy!x2m
int[] temp=new int[data.length]; .O*bILU
mergeSort(data,temp,0,data.length-1); Ko&hj XHx
} !}\4utHY
E+"dqSI/v
private void mergeSort(int[] data, int[] temp, int l, int r) { @''GPL@
int i, j, k; ]Fvm 7V
int mid = (l + r) / 2; H_!4>G@
if (l == r) <D&)OxEn\
return; Nfe>3uQK
if ((mid - l) >= THRESHOLD) $I#q
mergeSort(data, temp, l, mid); 8;y&Pb~)
else rV({4cIe9R
insertSort(data, l, mid - l + 1); f\;65k_jq
if ((r - mid) > THRESHOLD) f"7M^1)h2%
mergeSort(data, temp, mid + 1, r); Z34Wbun4
else KV|}#<dD
insertSort(data, mid + 1, r - mid); )2UZ% ?V#
2Nxm@B` {
for (i = l; i <= mid; i++) { IvpcSam'
temp = data; ;Zj]~|
} +9O5KI?P
for (j = 1; j <= r - mid; j++) { { 74mf'IW
temp[r - j + 1] = data[j + mid]; sG~<M"znV
} 'sp-%YlM -
int a = temp[l]; G a;.a
int b = temp[r]; vvB(r!
for (i = l, j = r, k = l; k <= r; k++) { -16K7yk
if (a < b) { 2eeQ@]Wj[Z
data[k] = temp[i++]; j` E +qk
a = temp; sC00un%
} else { S~qZr
data[k] = temp[j--]; x5dWBGH
b = temp[j]; P3 c\S[F
} <]C$xp<2
} Nf3.\eR
} Bb&^{7
#QvMVy
/** (vR 9H(#
* @param data a</D_66
* @param l ?Y:x[pOe
* @param i ;)Kh;;e
*/ &`Y!;@K9W#
private void insertSort(int[] data, int start, int len) { =5D nR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PqNFyQkl
} <)g8yA
} <J(sR
} h0?2j)X_
} jNwjK0?
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堆排序： c[}(OH
V&soN:HS
package org.rut.util.algorithm.support; .%'(9E
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import org.rut.util.algorithm.SortUtil; GN#<yv$av
"I;C;}!
/** o01kYBD
* @author treeroot >$gG/WD?KR
* @since 2006-2-2 c4e_6=Iv
* @version 1.0 -K(fh#<6KO
*/ K|C^l;M6
public class HeapSort implements SortUtil.Sort{ >Sa*`q3J
yix'rA-T
/* (non-Javadoc) rOW-0B+N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |W$DVRA
*/ l5Y/Ok0,
public void sort(int[] data) { nfb]VN~(
MaxHeap h=new MaxHeap(); It_M@
h.init(data); L?_7bXoD
for(int i=0;i h.remove(); : FAH\
System.arraycopy(h.queue,1,data,0,data.length); Bhqft;Nuh
} UH@as
#6+FY+/
private static class MaxHeap{ rA0,`}8\
M-NV_W&M
void init(int[] data){ <1w/hy&mWN
this.queue=new int[data.length+1]; )PkNWj6%y
for(int i=0;i queue[++size]=data; Xf=XBoN|
fixUp(size); H-rWDN#
} |6J ?8y
} 4@ILw
F Kc;W
private int size=0; E}CiQUx
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private int[] queue; )T907I|
l=`L7| ^/d
public int get() { >idBS
return queue[1]; ezhDcI_T
} [MX;,%;;
^/wfXm
public void remove() { s)voII&
SortUtil.swap(queue,1,size--); *y`%]Hy<
fixDown(1); j^`X~gE
} F}J-gZl
file://fixdown /9Q3iV$I]
private void fixDown(int k) { nM=e]qH
int j; Y**|N8e
while ((j = k << 1) <= size) { QH4wUU3X
if (j < size %26amp;%26amp; queue[j] j++; a\kb^D=T
if (queue[k]>queue[j]) file://不用交换 HQ!Xj.y
break; puSLqouTM
SortUtil.swap(queue,j,k); fQWIw
k = j; < (RC|?
} x+? 9C
} 1rw0sAuGy
private void fixUp(int k) { W]<$0
while (k > 1) { K.tlo^#^B[
int j = k >> 1; "Z,q?Fc
if (queue[j]>queue[k]) kI*(V[i
break; *VSel4;\t
SortUtil.swap(queue,j,k); 3zuF{Q2P<
k = j; @e~]t}fH
} OwzJO
} di9!lS$
Hx^!:kxk
} \8uo{#cL8
KHKS$D
} q^8EOAvnZ
k1z$e*u&r
SortUtil： XA0(f*
0X..e$'
package org.rut.util.algorithm; oC*ees g_
L^kp8o^$
import org.rut.util.algorithm.support.BubbleSort; @$Qof1j'%
import org.rut.util.algorithm.support.HeapSort; WV;=@v
import org.rut.util.algorithm.support.ImprovedMergeSort; (A k\Lm
import org.rut.util.algorithm.support.ImprovedQuickSort; ,zcQS-e2
import org.rut.util.algorithm.support.InsertSort; lw8"'0
import org.rut.util.algorithm.support.MergeSort; m:tiY [c>W
import org.rut.util.algorithm.support.QuickSort; b yg0.+e0
import org.rut.util.algorithm.support.SelectionSort; kg5ev8
import org.rut.util.algorithm.support.ShellSort; Eu@5L9A
J}spiVM
/** <Pqv;WI|R
* @author treeroot >Dm8m[76
* @since 2006-2-2 ]>##`X
* @version 1.0 &'|B =7
*/ h4&;?T S
public class SortUtil { :2V^K&2L
public final static int INSERT = 1; -P=g3Q i
public final static int BUBBLE = 2; p?(L'q"WK
public final static int SELECTION = 3; {B$2"q/~
public final static int SHELL = 4; :@ uIxa$[
public final static int QUICK = 5; Ftb%{[0}u3
public final static int IMPROVED_QUICK = 6; O/AE}]
public final static int MERGE = 7; Df07y<>7Q
public final static int IMPROVED_MERGE = 8; 1N`vCt]w
public final static int HEAP = 9; @`u?bnx]e
*a}(6Cx
public static void sort(int[] data) { =Je>`{J
sort(data, IMPROVED_QUICK); `T*U]/zQ
} hi{%pi&!T
private static String[] name={ l1_X(Z._V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T~4mQuYi
}; yT /EHmJ
L6:h.1 U$
private static Sort[] impl=new Sort[]{ qX:B4,|ck
new InsertSort(), ,1n >U?5
new BubbleSort(), !jX4`/n2
new SelectionSort(), `qpc*enf0
new ShellSort(), MKGS`X]<J
new QuickSort(), 2F_ R/{D
new ImprovedQuickSort(), ?v]-^X=&
new MergeSort(), rp! LP#*
new ImprovedMergeSort(), O0~vf[i];
new HeapSort() 8Vl!|\x5
}; O>r-]0DI[
c|p,/L09L
public static String toString(int algorithm){ Aw^yH+ae
return name[algorithm-1]; u/^|XOy
} )-P!Ae_.v
#5CI)4x0!
public static void sort(int[] data, int algorithm) { dZ2%S''\
impl[algorithm-1].sort(data); 7 &)]) {Q
} %Tcf6cK"
-<f/\U
public static interface Sort { 0Vv9BL{
public void sort(int[] data); *DeTqO65
} HB& &
<)m%*9{
public static void swap(int[] data, int i, int j) { :{g7lTM
int temp = data; g#^|oYuH6
data = data[j]; /F[+13C
data[j] = temp; tn<6:@T
} vS;'}N
} VC&c)X