[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; 2V$9ei6
} 79tJV
int i1=l; yiT{+;g^
int i2=mid+1; `Cj,HI_/*
for(int cur=l;cur<=r;cur++){ ryEvmWYu
if(i1==mid+1) t<lyg0f
data[cur]=temp[i2++]; hEOJb @:R
else if(i2>r) $FCw$+w
data[cur]=temp[i1++]; ^Kw(&v
else if(temp[i1] data[cur]=temp[i1++]; oQvFrSz
else A?Sm-#n{
data[cur]=temp[i2++]; RndOm.TE
} qJMp1DC
} FOp_[rR
d| \#?W&
} cdsQ3o
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改进后的归并排序: \X opU"
7SHo%bA
package org.rut.util.algorithm.support; Gg+YfY_
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import org.rut.util.algorithm.SortUtil; [+DNM 2A
7ukDS]
/** tJ>d4A;8x
* @author treeroot 7xDN.o*>
* @since 2006-2-2 ~~dfpW_"
* @version 1.0 IMR$x(g= F
*/ {G.{ad
public class ImprovedMergeSort implements SortUtil.Sort { 6QptKXu7
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private static final int THRESHOLD = 10; bV7QVu8
rxkBg0Z`a
/* [NR1d-Wg
* (non-Javadoc) }2xb&6g~o
* o}R|tOe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ja=N@&Z#
*/ *lq7t2
public void sort(int[] data) { },3R%?89%
int[] temp=new int[data.length]; -9Xw]I#QR
mergeSort(data,temp,0,data.length-1); Bcm=G""
} %#Q #N,fw
bgXc_>T6_y
private void mergeSort(int[] data, int[] temp, int l, int r) { ]eL~L_[G\
int i, j, k; }'_:XKLj
int mid = (l + r) / 2; -(ER4#
if (l == r) GD/nR4$
return; c=<v.J@K
if ((mid - l) >= THRESHOLD) s @3zx
mergeSort(data, temp, l, mid); Nuo<` 6mV@
else Es,0'\m&
insertSort(data, l, mid - l + 1); %,E7vYjT%
if ((r - mid) > THRESHOLD) fa.f(c
mergeSort(data, temp, mid + 1, r); L%4tw5*N
else C$0ITw
insertSort(data, mid + 1, r - mid); .?7So3
t9n'!
for (i = l; i <= mid; i++) { <sF!]R&4
temp = data; lZ+/\s,]|
} _4S7wOq5
for (j = 1; j <= r - mid; j++) { Jz2q\42q
temp[r - j + 1] = data[j + mid]; n%Rjt!9
} <m9JXO:5
int a = temp[l]; M%77u=m
int b = temp[r]; M,Po54u
for (i = l, j = r, k = l; k <= r; k++) { xKisL=l6Y
if (a < b) { <#!8?o&i
data[k] = temp[i++]; ,P1G?,y
a = temp; kfIbgya
} else { &A#90xzF
data[k] = temp[j--]; Is~yVB02
b = temp[j]; f(W,m >.;
} ?##y`.+O
} J]_)gb'1BR
} K oL%}u&
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/** vV2o[\o^
* @param data %hrsE5k^,
* @param l RH1U_gp4 ]
* @param i KN|'|2/|
*/ 9yp^zL
private void insertSort(int[] data, int start, int len) { EzwF`3RjK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !vi4* @:
} M|aQ)ivh3
} Oym]&SrbS
} >4Fdxa
} !WDn7j'A
7E@$}&E
堆排序： l %]<-
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package org.rut.util.algorithm.support; J78Qj[v
}:tAKO=+
import org.rut.util.algorithm.SortUtil; 1Z=;Uy\
Gu<W:n[
/** i,^>uf
* @author treeroot LjX&',
* @since 2006-2-2 N>h]mX6
* @version 1.0 1j8/4:
*/ VN1#8{
public class HeapSort implements SortUtil.Sort{ LH1BZ(5g
+X{cN5Y K
/* (non-Javadoc) UX+?0K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,(zcl$A[
*/ 6i55Ja
public void sort(int[] data) { 4h[2C6 \+`
MaxHeap h=new MaxHeap(); 9Vh_XBgP
h.init(data); ~ly`u
for(int i=0;i h.remove(); $=X!nQ& Z|
System.arraycopy(h.queue,1,data,0,data.length); @faF`8LwA
} MX%|hIOpr
}"!6Xm
private static class MaxHeap{ i@sCMCu6
Z{j!s6Y@{
void init(int[] data){ 1j_aH#Fz:
this.queue=new int[data.length+1]; }C9VTJs|
for(int i=0;i queue[++size]=data; &n,xGIG
fixUp(size); ' h0\4eu
} xow6@M,
} dpl"}+
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private int size=0; 2*b#+b
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private int[] queue; UzP@{?
:"h Pg]'
public int get() { m(Pz7U.Q
return queue[1]; 3g4vpKg6c
} 89?3,k
`XFX`1
public void remove() { =+kvL2nx-
SortUtil.swap(queue,1,size--); Uj y6vgU;
fixDown(1); F=P+;%.
} Mr@<ZTw
file://fixdown hJs&rpN
private void fixDown(int k) { UeIqAG8
int j; C{U[w^X
while ((j = k << 1) <= size) { !M#?kKj
if (j < size %26amp;%26amp; queue[j] j++; m&;zLBA;
if (queue[k]>queue[j]) file://不用交换 Ix%"4/z>
break; U:C-\ M
SortUtil.swap(queue,j,k); fbW,0
k = j; woC FN1W
} mRix0XBI~
} l[ZQ7$kL
private void fixUp(int k) { q|de*~@-P
while (k > 1) { x(T!I&i={
int j = k >> 1; 'npT+p$V
if (queue[j]>queue[k]) I3F6-gH
break; 6jQ&dN{=qB
SortUtil.swap(queue,j,k); ;+#za?w
k = j; M,=@|U/B
} 4OB~h]Vc
} I{Y {
kM}ic(K
} c+YYM :S
Xv<;[vq}F
} w7.?zb!N
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SortUtil： X8NO;w@z#
1GyAQHx,
package org.rut.util.algorithm; K%.YNVHHC
xOX*=Wv
import org.rut.util.algorithm.support.BubbleSort; (PE8H~d
import org.rut.util.algorithm.support.HeapSort; d[qEP6B
import org.rut.util.algorithm.support.ImprovedMergeSort; %s&E-*X
import org.rut.util.algorithm.support.ImprovedQuickSort; vi()1LS/!
import org.rut.util.algorithm.support.InsertSort; e{#a{`?Uez
import org.rut.util.algorithm.support.MergeSort; %^)JaEUC
import org.rut.util.algorithm.support.QuickSort; nOL 25Y:
import org.rut.util.algorithm.support.SelectionSort; fTi{oY,zTg
import org.rut.util.algorithm.support.ShellSort; OGD8QD
Y~\`0?ST
/** K[3D{=
* @author treeroot V"D<)VVA
* @since 2006-2-2 LgD{!
* @version 1.0 E?;T:7.%
*/ _sCJ3ZJ
public class SortUtil { Wtzj;GJj
public final static int INSERT = 1; $=S'#^Z
public final static int BUBBLE = 2; cVv4gQD\
public final static int SELECTION = 3; cxF?&0[mY
public final static int SHELL = 4; UVQa af
public final static int QUICK = 5; xSMp[j
public final static int IMPROVED_QUICK = 6; SBYMDKZ
public final static int MERGE = 7; WEY97_@
public final static int IMPROVED_MERGE = 8; p7ns(g@9
public final static int HEAP = 9; W@uH!n>k
3Wtv+L7Br
public static void sort(int[] data) { `!>dbR&1
sort(data, IMPROVED_QUICK); Jr*S2z<*
} U{:(j5m
private static String[] name={ Z2pN<S{5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \w@_(4")Qb
}; Rs(CrB/M
H--*[3".
private static Sort[] impl=new Sort[]{ q4#f *]
new InsertSort(), O+UV\
new BubbleSort(), Eg-Mm4o
new SelectionSort(), 6pdl,5[x-
new ShellSort(), Lb3K};SIV
new QuickSort(), 2 vJ[vsrFv
new ImprovedQuickSort(), 0qV*d
new MergeSort(), fG[3%e
new ImprovedMergeSort(), DJ2]NA$Q*
new HeapSort() *Yk8Mj^_h
}; >7v.`m6?H
g cK"
public static String toString(int algorithm){ N@du.d:
return name[algorithm-1]; 1p"EE~v
} i2%m}S;D9
,B/p1^;.
public static void sort(int[] data, int algorithm) { '2qxcco
impl[algorithm-1].sort(data); -aeo7C
} l1|,Lr
Gk]qE]hi
public static interface Sort { E(4lu%
public void sort(int[] data); ^*UfCoj9Z
} ?GD?J(S
]OCJ~Zw
public static void swap(int[] data, int i, int j) { -L4G WJ~.-
int temp = data; %F]9^C+
data = data[j]; n4_:#L?
data[j] = temp; 'rq#q)1MT
} E{]|jPdr
} "VVR#H}{