[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; `+DH@ce
} w`BY>Xft0
int i1=l; K[wny0 (
int i2=mid+1; +cH,2^&
for(int cur=l;cur<=r;cur++){ di.yh3N$
if(i1==mid+1) -R%T Dx
data[cur]=temp[i2++]; (~>uFH
else if(i2>r) =MR.*m{
data[cur]=temp[i1++]; MoAie|MKe
else if(temp[i1] data[cur]=temp[i1++]; .8o?`
else bn7"!6
data[cur]=temp[i2++]; sX8d8d`}
} uqz HS>GM
} rA+UftC:p6
gB7kb$J
} uu7 ?,WT
m(>MP/
改进后的归并排序: 7bV(eV
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package org.rut.util.algorithm.support; EdL2t``
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import org.rut.util.algorithm.SortUtil; TxJoN]Z.
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/** tIK`/)w,
* @author treeroot [^Z)f<l
* @since 2006-2-2 R*[X. H
* @version 1.0 {c :7:
*/ N5PW]
public class ImprovedMergeSort implements SortUtil.Sort { [}Q_T.4)E
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private static final int THRESHOLD = 10; # &,W x
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/* Fqt,VED
* (non-Javadoc) jJY{np
* w"`Zf7a{/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z8Iqgz7|y
*/ t1JU_P
public void sort(int[] data) { sX@}4[)<&
int[] temp=new int[data.length]; (k^%j
mergeSort(data,temp,0,data.length-1); uTShz3
} Z";&1cK
\gsJ1@
private void mergeSort(int[] data, int[] temp, int l, int r) { mjQZ"h0
int i, j, k; 3S5`I9I
int mid = (l + r) / 2; ! k[JP+;
if (l == r) dhX$b!DA
return; Sj ly]
if ((mid - l) >= THRESHOLD) /!#A'#Z
mergeSort(data, temp, l, mid); <ni_78
else 0OXl`V`w
insertSort(data, l, mid - l + 1); >D jJ*vM
if ((r - mid) > THRESHOLD) E2xK GK
mergeSort(data, temp, mid + 1, r); PglSQ2P
else )[S#:PP
insertSort(data, mid + 1, r - mid); r>e1IG
$7QGi|W*k
for (i = l; i <= mid; i++) { l k sNy
temp = data; lfAiW;giJ
} TU6(Q,Yi|
for (j = 1; j <= r - mid; j++) { mtg=v@~
temp[r - j + 1] = data[j + mid]; xfF;u9$;
} tj?%{L
int a = temp[l]; ^w!1QH0:/
int b = temp[r]; _/czH<
for (i = l, j = r, k = l; k <= r; k++) { Y{Ff I+
if (a < b) { 9u6VN]divB
data[k] = temp[i++]; <{+U- ^rzR
a = temp; w%?Zb[!&
} else { 5tI#UBha
data[k] = temp[j--]; zv7)JH7EV&
b = temp[j]; \0W0o5c$
} v<Ywfb
} Jc7}z:UB
} ?8do4gT+1
/1v:eoF;
/** P BVF'~f@j
* @param data vM@8&,;
* @param l vX7U|zy
* @param i ?n]adS{
*/ k:&vW21E
private void insertSort(int[] data, int start, int len) { 4@+']vN4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v.&c1hKHb
} YV8PybThc
} #bJp)&LO
} .=)[S5.BVq
} i[?VF\Y(
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堆排序： gyQPQ;"H$2
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package org.rut.util.algorithm.support; =r)LG,w212
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import org.rut.util.algorithm.SortUtil; 48Jt5Jz_
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/** :?}mu1
* @author treeroot ,(RpBTV
* @since 2006-2-2 y"Pd>61h
* @version 1.0 K5rra%a-7
*/ P5H_iH
public class HeapSort implements SortUtil.Sort{ ]h#QA;
T, +=ka$
/* (non-Javadoc) &1f3e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v}J0j
*/ UGlHe7
public void sort(int[] data) { 76o3Sge:
MaxHeap h=new MaxHeap(); !7f,gvk
h.init(data); UlWm). b;v
for(int i=0;i h.remove(); o[1#)&
System.arraycopy(h.queue,1,data,0,data.length); +!GJ
} gKY6S?
g${JdxR:
private static class MaxHeap{ bSz@@s.
V%{WH}
void init(int[] data){ ek.@ 0c
this.queue=new int[data.length+1]; rq^%)tR
for(int i=0;i queue[++size]=data; =k*XGbU
fixUp(size); mr2Mu
} <$@I*xk[
} ,N_/J4Us
wMw}3qX$j
private int size=0; J0 dY%pH#
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private int[] queue; )+"5($~
aM xd"cTzx
public int get() { ?K;l 5$?%
return queue[1]; jU kxA7 }}
} Yg?BcY\
tUuARo7#
public void remove() { ${E^OE
SortUtil.swap(queue,1,size--); A|,qjiEJCc
fixDown(1); +~BP~
} Q lA?dXQ
file://fixdown 5HsF#
private void fixDown(int k) { J>k 6`gw
int j; aNs8T`
while ((j = k << 1) <= size) { j74hWz+p4
if (j < size %26amp;%26amp; queue[j] j++; /\_n5XI1
if (queue[k]>queue[j]) file://不用交换 +I-BqA9
break; kh{3s:RQfC
SortUtil.swap(queue,j,k); C=|8C70[%N
k = j; {=\Fc`74
} B;F~6i
} [KFCc_:
private void fixUp(int k) { q2r$j\L%
while (k > 1) { o ^ \+Ua
int j = k >> 1; .P`QCH;Ih
if (queue[j]>queue[k]) $}r.fji,c
break; Zxd*%v;
SortUtil.swap(queue,j,k); ,v 2^Ui
k = j; %.D!J",\/K
} /D1Lh_,2
} [=BMvP5
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} 5isejR{r
#5T+P8
} S >uzW #
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SortUtil： OFCOMM
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package org.rut.util.algorithm; e.i5j^5u
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import org.rut.util.algorithm.support.BubbleSort; z48,{H6h
import org.rut.util.algorithm.support.HeapSort; 3a_S-&?X
import org.rut.util.algorithm.support.ImprovedMergeSort; L^)&"6oSa
import org.rut.util.algorithm.support.ImprovedQuickSort; AFl]w'=
import org.rut.util.algorithm.support.InsertSort; ~xu<xy@E
import org.rut.util.algorithm.support.MergeSort; 5A/G?
import org.rut.util.algorithm.support.QuickSort; (hVhzw"~
import org.rut.util.algorithm.support.SelectionSort; lx~!FLn
import org.rut.util.algorithm.support.ShellSort; -.1x!~.jX
ow ~(k5k:
/** #OH-LWZh
* @author treeroot u%#bu^4"
* @since 2006-2-2 x+"~-KO8q$
* @version 1.0 ]E88zWDY`
*/ ,~gY'Ql
public class SortUtil { W=o90TwbN
public final static int INSERT = 1; 4W~pAruwr
public final static int BUBBLE = 2; ld4QhZia
public final static int SELECTION = 3; nvxftbfE^D
public final static int SHELL = 4; 29pIO]8;
public final static int QUICK = 5; $)mE"4FE
public final static int IMPROVED_QUICK = 6; RT8xU;
public final static int MERGE = 7; "Sc_E}q|e
public final static int IMPROVED_MERGE = 8; mKPyM<Q
public final static int HEAP = 9; Tv3Bej
zhU)bb[A
public static void sort(int[] data) { "MKgU[t
sort(data, IMPROVED_QUICK); \Zqgr/.w/
} 0eQyzn*98
private static String[] name={ _NA0$bGN9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?z171X0
}; &n6mXFF#>P
r~z-l,
private static Sort[] impl=new Sort[]{ ^~0\d;l_
new InsertSort(), Lcf =)GL
new BubbleSort(), ,+KZn}>
new SelectionSort(), pcv(P
new ShellSort(), Z'>Xn^
new QuickSort(), T c4N\Cy
new ImprovedQuickSort(), { o=4(RC
new MergeSort(), =E8lpN'
new ImprovedMergeSort(), QSW62]=vV
new HeapSort() .KGW#Qk8
}; d3+pS\&IX?
0"kNn5
public static String toString(int algorithm){ ddmTMfH
return name[algorithm-1]; V{O,O,*
} B9/x?Jv1
!uii|"
public static void sort(int[] data, int algorithm) { Xlpu_H|
impl[algorithm-1].sort(data); G@oY2sM"
} fKf5i@CvB@
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public static interface Sort { aIpDf|~
public void sort(int[] data); t(-noy)
} {v}f/cu
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public static void swap(int[] data, int i, int j) { lV:R8^d
int temp = data; Vz!W(+
data = data[j]; P&V,x`<Z
data[j] = temp; H2l/9+
} E'?yI'~=
} "GEJ9_a[