[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; T=,A pa
} YmPNaL
int i1=l; M]7>Ar'zsG
int i2=mid+1; %U?1Gf e
for(int cur=l;cur<=r;cur++){ 3R& FzLs
if(i1==mid+1) 05ovz
data[cur]=temp[i2++]; /8Ru O
else if(i2>r) g>pvcf(
data[cur]=temp[i1++]; @Yj+u2!
else if(temp[i1] data[cur]=temp[i1++]; E+z"m|G
else <44A*ux
data[cur]=temp[i2++]; kHbH{])
} 9/#?]LJ
} Xy]Pmt
z(eAhK}6?
} T)o>U&KNP
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改进后的归并排序: ~A@HW!*Z@
lPZYd8
package org.rut.util.algorithm.support; m <'&`B;
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import org.rut.util.algorithm.SortUtil; qAW?\*n5N
Pr'Ij
/** EECuJ+T
* @author treeroot p;Nq(=] \
* @since 2006-2-2 `e4gneQY
* @version 1.0 9A,ok[J
*/ F[)5A5+:Y
public class ImprovedMergeSort implements SortUtil.Sort { 2Y~nU(
EE5mVC&
private static final int THRESHOLD = 10; :r4o:@N'
-]Y@_T.C
/* v2jpao<K
* (non-Javadoc) 2(AuhZ>
* XiO~^=J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *2>kic aH
*/ W9!K~g_
public void sort(int[] data) { } /*U~!t
int[] temp=new int[data.length]; VRB!u420
mergeSort(data,temp,0,data.length-1); K_ Odu^
} g[Q+DT
.]YTS
private void mergeSort(int[] data, int[] temp, int l, int r) { 7q(A&
int i, j, k; I=2b)"t0
int mid = (l + r) / 2; $pJw p{kN
if (l == r) #HTq\J!
return; YY4q99^K
if ((mid - l) >= THRESHOLD) -dS@l'$
mergeSort(data, temp, l, mid); }D[j6+E
else nArG I}@
insertSort(data, l, mid - l + 1); s("\]K
if ((r - mid) > THRESHOLD) ipC <p?PpR
mergeSort(data, temp, mid + 1, r); vYg>^!Q
else n7/>+V+
insertSort(data, mid + 1, r - mid); Hu$y8_Udw
<DZ$"t
for (i = l; i <= mid; i++) { kRqe&N e
temp = data; Ay0.D FL
} M(?0c}z
for (j = 1; j <= r - mid; j++) { 4'5|YGQj
temp[r - j + 1] = data[j + mid]; [H@71+_Q
} |B {*so]
int a = temp[l]; *RM 3_
int b = temp[r]; L6./5`bs
for (i = l, j = r, k = l; k <= r; k++) { xF6byTi
if (a < b) { =2@V}
data[k] = temp[i++]; tU0jFBB
a = temp; .Ta(v3om%
} else { )&j@={0
data[k] = temp[j--]; #%g>^i={ky
b = temp[j]; G%ZP`
} UM<!bNz`
} 8j)*T9
} _<KUa\
=&F~GCZ>
/** -B& Nou
* @param data K\FLA_J
* @param l 3sD|R{
* @param i ]0XlI;ah
*/ VWc)AfKe
private void insertSort(int[] data, int start, int len) { Bo$dIn2_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rK\9#[?x
} :(iBLO<x
} C55Av%-=
} xp}M5|
} 20# V?hX3
l5#SOo\
堆排序： =!\Y;rk
p\R&vof*
package org.rut.util.algorithm.support; !Df>Q5~g
.C` YO2,
import org.rut.util.algorithm.SortUtil; zpjE_|
]$=#:uf
/** x4K A8
* @author treeroot @N]]Cf>x
* @since 2006-2-2 Lg~ll$ U
* @version 1.0 G6dUm_iB
*/ ]h,iyWSs
public class HeapSort implements SortUtil.Sort{ ~+C)0Yn
< 0YoZSNGj
/* (non-Javadoc) m(D+!I9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pzZ+!d
*/ pp{2[>
public void sort(int[] data) { 7"F29\
MaxHeap h=new MaxHeap(); p|?FA@ 3
h.init(data); mV^~
for(int i=0;i h.remove(); N=\weuED
System.arraycopy(h.queue,1,data,0,data.length); c]n"1YNm
} 74 &q2g{
FA+"t^q
private static class MaxHeap{ 5+Ao.3Xn
}[R-)M
void init(int[] data){ |Sm/s;&c6
this.queue=new int[data.length+1]; o{hX?,4i
for(int i=0;i queue[++size]=data; - AU{Y`j
fixUp(size); U(LLIyZv
} }m'n1tm;
} PQp =bX,
:_tt9J
private int size=0; Tw7]
b;%t*?t
private int[] queue; lh[?`+A
Z #T
public int get() { ,ga6
return queue[1]; )_1 GPS
} 2WTOu x*
s_a jA
public void remove() { P8Wv&5A
SortUtil.swap(queue,1,size--); Bhv$
fixDown(1); XT4Gz|k
} ]jYFrOMy4S
file://fixdown SZEi+CRs0
private void fixDown(int k) { tJybR"NQ
int j; tbWfm5$
while ((j = k << 1) <= size) { !-.GfI:q
if (j < size %26amp;%26amp; queue[j] j++; OQ- Hn-H
if (queue[k]>queue[j]) file://不用交换 Nke!!A}\|
break; V$sY3,J7A%
SortUtil.swap(queue,j,k); 2:_6nWl
k = j; =#v? }JG
} mBE&>}G<
} P#,;)HF
private void fixUp(int k) { *yaS^k\
while (k > 1) { R|v'+bv
int j = k >> 1; H]pI$t3~
if (queue[j]>queue[k]) FJ-H ;
break; XbqMWQN*
SortUtil.swap(queue,j,k); ]8}51y8
k = j; yu)^s!UY;
} AYgXqmH~+
} fCwE1r*^
DU0/if9.
} fGO\f;P
^lAM /
} 4(|yl^w
A4'5cR9T!
SortUtil： 3+15 yEeA
! 5NuFLOf
package org.rut.util.algorithm; 8AX_y3$
:nQlS
import org.rut.util.algorithm.support.BubbleSort; 0/b _T
import org.rut.util.algorithm.support.HeapSort; h%krA<G9
import org.rut.util.algorithm.support.ImprovedMergeSort; o6d x\
import org.rut.util.algorithm.support.ImprovedQuickSort; t*=[RS*
import org.rut.util.algorithm.support.InsertSort; r!+{In+Z
import org.rut.util.algorithm.support.MergeSort; W*t] d
import org.rut.util.algorithm.support.QuickSort; Xv|=RNz
import org.rut.util.algorithm.support.SelectionSort; @phVfP"M
import org.rut.util.algorithm.support.ShellSort; i=cST8!8N
KWZhCS?[(
/** Zym6btc
* @author treeroot REU,"
* @since 2006-2-2 sVK?sBs]
* @version 1.0 IQRuqp KL
*/ v6s,lC5qR
public class SortUtil { B*,)@h
public final static int INSERT = 1; lI 4tW=
public final static int BUBBLE = 2; $[A\i<#
public final static int SELECTION = 3; tqZ+2c<W3
public final static int SHELL = 4; NS~;{d\
public final static int QUICK = 5; &cSVOsi
public final static int IMPROVED_QUICK = 6; )63 $,y-;$
public final static int MERGE = 7; =c'4rJ$+
public final static int IMPROVED_MERGE = 8; L%T(H<G
public final static int HEAP = 9; {d'-1z"q
pA6KiY&
public static void sort(int[] data) { EUi 70h+
sort(data, IMPROVED_QUICK); yQE'!m
} E4L?4>V@\
private static String[] name={ njF$1? )sq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lr:Qc#2
}; ?: yz/9(
du66a+@t
private static Sort[] impl=new Sort[]{ x}yl Rg`[
new InsertSort(), IHni1
new BubbleSort(), Gv_~@MN
new SelectionSort(), wQSye*ec
new ShellSort(), } #rTUX
new QuickSort(), Q$c6l[(g
new ImprovedQuickSort(), T&?g)
new MergeSort(), -GAF>
new ImprovedMergeSort(), c]PTU2BB8
new HeapSort() lPZ(c%P
}; n^Ca?|} ,
5 wrRtzf
public static String toString(int algorithm){ x#J9GP.
return name[algorithm-1]; gSz<K.CT
} x9"Cm;H%
HOR8Jwf:
public static void sort(int[] data, int algorithm) { 9{*{Ba
impl[algorithm-1].sort(data); P.'.KZJ:WD
} ;!MQ@Fi^
%.Ma_4o Z
public static interface Sort { rD].=.?1
public void sort(int[] data); q 84*5-
} FH+X<
5To@d|{
public static void swap(int[] data, int i, int j) { Y~WdN<g
int temp = data; v Y0bK-
data = data[j]; ~5f&<,p!
data[j] = temp; \8`7E1d
} QB*,+u4
} i6WH^IQM