[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; 2?W7I/F
} 5rb-U7 /
int i1=l; 9'nH2,_
int i2=mid+1; )0k']g5
for(int cur=l;cur<=r;cur++){ n2{SV
if(i1==mid+1) 7G<t"'
data[cur]=temp[i2++]; &fwS{n;U
else if(i2>r) glE^t6)
data[cur]=temp[i1++]; -Fxmsi
else if(temp[i1] data[cur]=temp[i1++]; =bLY /
else `S3>3
data[cur]=temp[i2++]; z[C3
} 1D F/6y
} >xqM5#m`E$
(gwj)?:
} "0CjP+1k
rkB'Hf
改进后的归并排序: oFDz;6
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package org.rut.util.algorithm.support; hIYTe
}^-<k0A4?
import org.rut.util.algorithm.SortUtil; 8 TiG3
P:C2G(V1AR
/** -oyO+1V
* @author treeroot j}:~5|.
* @since 2006-2-2 :K':P5i
* @version 1.0 =8Ehrlq
*/ }tG3tz0%fX
public class ImprovedMergeSort implements SortUtil.Sort { 2&Jdf
}7s>B24J
private static final int THRESHOLD = 10; HfB@vw^
HN6}R|IH
/* 5GQLd
* (non-Javadoc) >9H@|[C
* +9XQ[57
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :7g=b%;
*/ T6#CK
public void sort(int[] data) { WC,+Cn e
int[] temp=new int[data.length]; ?wb+L
mergeSort(data,temp,0,data.length-1); X^@I].
} 17|np2~
9Q;c,]
private void mergeSort(int[] data, int[] temp, int l, int r) { .]x2K-Sf
int i, j, k; d$W
int mid = (l + r) / 2; -%CoWcGP
if (l == r) (:pq77
return; 5fJ[}~
if ((mid - l) >= THRESHOLD) 4)6xU4eBaL
mergeSort(data, temp, l, mid); _[K"gu
else DgHaOAdU
insertSort(data, l, mid - l + 1); 3;[DJ5
if ((r - mid) > THRESHOLD) (`BSVxJH
mergeSort(data, temp, mid + 1, r); Q`%R[#
else lrWQOYf2
insertSort(data, mid + 1, r - mid); FV39QG4b4
B,WTHU[AV
for (i = l; i <= mid; i++) { BvD5SBa}"
temp = data; tV;`fV
} CZ<~3bEF
for (j = 1; j <= r - mid; j++) { &HW1mNF9
temp[r - j + 1] = data[j + mid]; X2|Y
} N8r*dadDd
int a = temp[l]; \x{;U#B[3>
int b = temp[r]; l_rn++
for (i = l, j = r, k = l; k <= r; k++) { Z8#Gwyinx
if (a < b) { +rXF{@ l
data[k] = temp[i++]; E Y<8B3y
a = temp; sP@X g;]
} else { b5G}3)'w
data[k] = temp[j--]; 6K`c/)
b = temp[j]; )D&M2CUw"f
} 8~lIe:F-
} ~PWSo%W8
} xNK1h-t
i_Re*
/** /u%h8!"R
* @param data &MZ$j46
* @param l nlYR-.
* @param i +!IQj0&'Y3
*/ $~0Q@):
private void insertSort(int[] data, int start, int len) { WE6a'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B/JO~;{
} -t2T(ha
} xo}b= v
} D]a:@x`+Bz
} wxg^Bq)D*R
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堆排序： rl#vE's6.e
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package org.rut.util.algorithm.support; ^N}Wnk7ks'
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import org.rut.util.algorithm.SortUtil; =L|tp%!
aNn"X y\ k
/** KlV:L 4a~
* @author treeroot C?ib_K*
* @since 2006-2-2 9E2j!
* @version 1.0 acP+3u?r
*/ aprm0:Q^
public class HeapSort implements SortUtil.Sort{ Zn=T#o
3A:q7#m
/* (non-Javadoc) n<sd!xmqFx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,;?S\V
*/ I:bD~Fb3
public void sort(int[] data) { vu!d)Fy
MaxHeap h=new MaxHeap(); n79QJl/
h.init(data); ;8WZx
for(int i=0;i h.remove(); T{qTj6I
System.arraycopy(h.queue,1,data,0,data.length); fj7|D'c
} -9 !.m
}G o$ \Bk
private static class MaxHeap{ vb 1@yQ
Z=B_Ty
void init(int[] data){ FGO[ |]7IN
this.queue=new int[data.length+1]; l0&EZN0V2
for(int i=0;i queue[++size]=data; J:uW`R
fixUp(size); `RU[8@ 2%
} S##1GOO
} \^(0B8|w
9a\nszwa
private int size=0; JO=[YoTr
|(moWY=
private int[] queue; IK,|5]*Ar
Zwcy4>8
public int get() { >Vy>O&r
return queue[1]; 21s4MagC
} UYk>'\%H0
w-Nhs6
public void remove() { 5D M"0
SortUtil.swap(queue,1,size--); -9RDr\&`(
fixDown(1); MMB@.W
} mk7&<M
file://fixdown O#wpbrJ
private void fixDown(int k) { |qZko[W}=
int j; b'MSkEiQG
while ((j = k << 1) <= size) { Wg{k$T_>
if (j < size %26amp;%26amp; queue[j] j++; Go,N>HN
if (queue[k]>queue[j]) file://不用交换 WN(ymcdYB
break; h)~=Dm
SortUtil.swap(queue,j,k); SN4Q))dAU
k = j; `%+ mO88o
} ]E =Iu
} *Av"JAX
private void fixUp(int k) { &g2 Eptx#
while (k > 1) { G}5#l
int j = k >> 1; M"%Q&o/I
if (queue[j]>queue[k]) zR!o{8
break; gtUUsQ%y.
SortUtil.swap(queue,j,k); i)#:qAtP*
k = j; m}>F<;hQ
} ^F?&|clM/
} WI]o cF
^[%%r3"$C
} V8eB$in
S'oGt&Z<
} OD']:
$$:ZX
SortUtil： $/6;9d^
2[0JO.K 4
package org.rut.util.algorithm; *[=bR>
"V{yi!D{<
import org.rut.util.algorithm.support.BubbleSort; G:x*BH+
import org.rut.util.algorithm.support.HeapSort; jx acg^c
import org.rut.util.algorithm.support.ImprovedMergeSort; v]__%_
import org.rut.util.algorithm.support.ImprovedQuickSort; ?+T^O?r|O
import org.rut.util.algorithm.support.InsertSort; >]o}}KF?
import org.rut.util.algorithm.support.MergeSort; .0R v(Y
import org.rut.util.algorithm.support.QuickSort; "[}O"LTQ
import org.rut.util.algorithm.support.SelectionSort; V\(:@0"
import org.rut.util.algorithm.support.ShellSort; V]*b4nX7
Sq:0w
/** $}")1|U,X
* @author treeroot As+t##gN
* @since 2006-2-2 -v6M<
* @version 1.0 $gBd <N9|c
*/ jxJv.
public class SortUtil { }|%eCVB
public final static int INSERT = 1; ?g!V!VS2
public final static int BUBBLE = 2; 099sN"kf
public final static int SELECTION = 3; ~=R SKyzt
public final static int SHELL = 4; > iE!m
public final static int QUICK = 5; EUsI%p
public final static int IMPROVED_QUICK = 6; <b/~.$a'
public final static int MERGE = 7; FI"`DMb}
public final static int IMPROVED_MERGE = 8; G,;,D9jO7
public final static int HEAP = 9; EyY.KxCB
wP,JjPUt
public static void sort(int[] data) { fDx9iHGv
sort(data, IMPROVED_QUICK); 5k|9gICyd*
} i-yy/y-N
private static String[] name={ @ P|LLG'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OFje+S
}; pm{|?R
eAPXWWAZJ1
private static Sort[] impl=new Sort[]{ gWY"w!f
new InsertSort(), L@JOGCYy
new BubbleSort(), W2uOR{ '?
new SelectionSort(), p&VU0[LIC0
new ShellSort(), qY 4#V k
new QuickSort(), $=?@*p
new ImprovedQuickSort(), [pVamE
new MergeSort(), /c):}PJ^#7
new ImprovedMergeSort(), bI|2@HV2
new HeapSort() vM_:&j_?``
}; 0a"igq9t
!n^OM?.4
public static String toString(int algorithm){ o:V|:*1Q
return name[algorithm-1]; r,_?F7
} =)|-?\[w
Q]p(u\*
public static void sort(int[] data, int algorithm) { wgd/(8d
impl[algorithm-1].sort(data); uYrfm:4S
} MQin"\
klUQkz |<a
public static interface Sort { eW|^tH
public void sort(int[] data); %4HRW;IU
} 'U'yC2BI n
'=P7""mN5
public static void swap(int[] data, int i, int j) { %,ngRYxT#
int temp = data; Le%ZV%,
data = data[j]; [ Bl c^C{f
data[j] = temp; }B~If}7
} svXR<7)#
} /PsnD_s]5