[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; QH4wUU3X
} a\kb^D=T
int i1=l; HQ!Xj.y
int i2=mid+1; ?&WYjTU]H
for(int cur=l;cur<=r;cur++){ C2]Kc{4
if(i1==mid+1) B;Nl~Y|\
data[cur]=temp[i2++]; ^Yr0@pE
else if(i2>r) TAL/a*7\
data[cur]=temp[i1++]; 50jOA#l[
else if(temp[i1] data[cur]=temp[i1++]; ArLvz5WV
else sKLX[l
data[cur]=temp[i2++]; #gQF'
} rh2LGuo4m
} 39e;
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} .F&9.#>
5OM?3M
改进后的归并排序: MFJE6ei
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package org.rut.util.algorithm.support; !=Y;h[J.p
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import org.rut.util.algorithm.SortUtil; m!XI{F@x
oC*ees g_
/** L^kp8o^$
* @author treeroot +5<k-0v
* @since 2006-2-2 NW$H"}+o
* @version 1.0 CozKyt/r7
*/ P#kGX(G9!
public class ImprovedMergeSort implements SortUtil.Sort { D|I Ec?
vY6W|<s
private static final int THRESHOLD = 10; wbbqt0un
hRaf#
/* l2v_?j-)x
* (non-Javadoc) {TSY|D2
* pvWau1ArNq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hyk'c't_O
*/ 5G}6;UY
public void sort(int[] data) { !.-tW7
int[] temp=new int[data.length]; ]>##`X
mergeSort(data,temp,0,data.length-1); &'|B =7
} h4&;?T S
c"YXxAJ
private void mergeSort(int[] data, int[] temp, int l, int r) { I"L;L?\S
int i, j, k; $X`y%*<<v
int mid = (l + r) / 2; CF y}r(q
if (l == r) #~:P}<h
return; KcGsMPJ
if ((mid - l) >= THRESHOLD) wn+FTqj
mergeSort(data, temp, l, mid); BJjx|VA+
else ClW'W#*(Y
insertSort(data, l, mid - l + 1); 2)iD4G`
if ((r - mid) > THRESHOLD) uE_c4Hp
mergeSort(data, temp, mid + 1, r); xc 1A$EY
else +,'T=Ic{
insertSort(data, mid + 1, r - mid); zbw7U'jk
! U0z"
for (i = l; i <= mid; i++) { qcB){p+UQ
temp = data; ,a|@d}U
} hp!d/X=J_
for (j = 1; j <= r - mid; j++) { iCG`3(xL
temp[r - j + 1] = data[j + mid]; =?@Q-(bp
} khd5 Cf[
int a = temp[l]; 'aJgLws*w
int b = temp[r]; ";3*?/uM
for (i = l, j = r, k = l; k <= r; k++) { `hh9"Ws%
if (a < b) { XaI;2fMGI
data[k] = temp[i++]; tgFJZA
a = temp; /4S;QEv
} else { 4 (?MUc
data[k] = temp[j--]; E,G<_40
b = temp[j]; ;#?M)o:q
} ucYkxi`x
} IxSV?k
} >X}{BDMb.
u/^|XOy
/** g1m-+a
* @param data @_'OyRd8
* @param l Go\VfLLw
* @param i d{+(Lpj^
*/ vL_zvXA
private void insertSort(int[] data, int start, int len) { M.%shrJ/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^t.W|teD
} F%.xuLW
} |g)FA_#|<
} N$aZ== $5
} uF(k[[qaiN
/9ZcM]X B
堆排序： B:oF;~d/,
I@7/jUO
package org.rut.util.algorithm.support; r((Tavn
_j#SpL'P
import org.rut.util.algorithm.SortUtil; wvc>0?t'
'8Wv.X0`
/** _."E%|5
* @author treeroot ,TC~~EWq
* @since 2006-2-2 y>o>WN<q
* @version 1.0 $%qg"
*/ E{^^^"z P
public class HeapSort implements SortUtil.Sort{ :xeLt;
*_hLD5K!
/* (non-Javadoc) WO</Q6+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2wpjU&8W!
*/ W?,$!]0
public void sort(int[] data) { W|c.l{A5Q
MaxHeap h=new MaxHeap(); gp
h.init(data); #!#z5DJu
for(int i=0;i h.remove(); "e62/Ejg%
System.arraycopy(h.queue,1,data,0,data.length); ~uaP$*B[
} L/r{xS
b](o]O{v
private static class MaxHeap{ D!FaEN
Df=q-iq<{/
void init(int[] data){ TQ9'76INb
this.queue=new int[data.length+1]; 1p\Ak
for(int i=0;i queue[++size]=data; qc8Ta"
fixUp(size); 7[o {9Yp&
} "n?<2 wso
} 6 DP[g8
>9(i)e
private int size=0; 2_pz3<,\
%`\]Y']R
private int[] queue; A3UQJ
l8wF0|
public int get() { S ~|.&0"\
return queue[1]; QlzQ]:dWC
} YdOUv|tZC
P#tvm,
public void remove() { tHI*,
SortUtil.swap(queue,1,size--); "DckwtG:%
fixDown(1); =HE m)
} %?tq;~|]Q
file://fixdown Z;<ep@gy~
private void fixDown(int k) { k/`i6%F#m
int j; <MZi<Z`
while ((j = k << 1) <= size) { 'U)8rR
if (j < size %26amp;%26amp; queue[j] j++; :m`/Q_y"
if (queue[k]>queue[j]) file://不用交换 gue(C(~.k_
break; 1L[S*X
SortUtil.swap(queue,j,k); MW@DXbKVl
k = j; XVUf,N,
} $L{7%]7QC
} ^ }#f()
private void fixUp(int k) { j[DIz@^
while (k > 1) { a-PGW2G
int j = k >> 1; h([0,:\
if (queue[j]>queue[k]) ]h@{6N'oNS
break; &BgU:R,
SortUtil.swap(queue,j,k); ,P@QxnQ
k = j; ?0J0Ij,
} Zoow*`b|$U
} Ak=UtDN[
5-'vB
} L>nO:`>h
#v8Cy|I
} 79tJV
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SortUtil： |R~;&x:
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package org.rut.util.algorithm; 6FjVmje
q<XcOc5
import org.rut.util.algorithm.support.BubbleSort; 7Po/_%
import org.rut.util.algorithm.support.HeapSort; s/S+ ec3
import org.rut.util.algorithm.support.ImprovedMergeSort; L?f qcW{
import org.rut.util.algorithm.support.ImprovedQuickSort; 1URsHV!xcM
import org.rut.util.algorithm.support.InsertSort; M[,^KJ!
import org.rut.util.algorithm.support.MergeSort; 6Bdyf(t
import org.rut.util.algorithm.support.QuickSort; b\L)m (
import org.rut.util.algorithm.support.SelectionSort; %HEmi;
import org.rut.util.algorithm.support.ShellSort; `@$YlFOW
Ihef$,
/** LXxl?D
* @author treeroot lIl9ypikg
* @since 2006-2-2 7.|S>+Q
* @version 1.0 `Kp}s<
*/ s5.k|!K
public class SortUtil { Wf1-"Q
public final static int INSERT = 1; -s~p}CQ.
public final static int BUBBLE = 2; '%Dg{ zL
public final static int SELECTION = 3; ZOHRUm
public final static int SHELL = 4; yS"0/Rm}
public final static int QUICK = 5; '%O\E{h
public final static int IMPROVED_QUICK = 6; & =sayP
public final static int MERGE = 7; !:J<pWN"
public final static int IMPROVED_MERGE = 8; qS82/e)7
public final static int HEAP = 9; s=jO;K$
ddMM74
public static void sort(int[] data) { p;ZDpR
sort(data, IMPROVED_QUICK); f[M"EMy
} Ap,q `S
private static String[] name={ K!b>TICa:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]}_,U!`8
}; "0Y&~q[=
"GBUQ}
private static Sort[] impl=new Sort[]{ +2(PcJR~
new InsertSort(), YD+QX@
new BubbleSort(), d.1Q~&`
new SelectionSort(), g[<uwknf
new ShellSort(), s.ey!ew
new QuickSort(), <M>#qd@c
new ImprovedQuickSort(), RA~_]Hk
new MergeSort(), @f'AWeJ2
new ImprovedMergeSort(), ;@O(z*14@
new HeapSort() %w%zv2d
}; ,,2_/u\"/i
L`bo#,eg6
public static String toString(int algorithm){ ~l4Q~'
return name[algorithm-1]; Cj=J;^vf
} b6$4Ul-.
@%7/2k
public static void sort(int[] data, int algorithm) { X)FQ%(H<
impl[algorithm-1].sort(data); g&8.A(
} W.sD2f
,|>nF;.Y
public static interface Sort { otZ JY)
public void sort(int[] data); vKV{ $|
} (BhL/A 4
Ut=0~x.=<
public static void swap(int[] data, int i, int j) { M,Po54u
int temp = data; xKisL=l6Y
data = data[j]; <#!8?o&i
data[j] = temp; ,P1G?,y
} kfIbgya
} &A#90xzF