[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; M0fN[!*z
} qS/}aDk&
int i1=l; j*?8w(!
int i2=mid+1; 5:IDl1f5
for(int cur=l;cur<=r;cur++){ I0~'z f
if(i1==mid+1) t[`LG)
data[cur]=temp[i2++]; Gg'!(]v
else if(i2>r) O>]i?
data[cur]=temp[i1++]; F(ydqgH~a
else if(temp[i1] data[cur]=temp[i1++]; HqW /
else -a)1L'R
data[cur]=temp[i2++]; A r]*?:4y[
} KSchgon0V
} qKfUm:7Q_
eavn.I8J
} :6nD"5(
qhGz2<}_j
改进后的归并排序: _HHvL=
HXKM<E{j
package org.rut.util.algorithm.support; SPb+H19;
0* F` h
import org.rut.util.algorithm.SortUtil; ^^"zjl*^
~-A"j\gi"
/** )hrsA&1w
* @author treeroot M/p9 I gp
* @since 2006-2-2 ?0/$RpFEM#
* @version 1.0 x!_5/
*/ /&Oo)OB;
public class ImprovedMergeSort implements SortUtil.Sort { l|WFS
i|1*bZ6'
private static final int THRESHOLD = 10; >SDQ@63E?
(Ut8pa+yX
/* ;Yee0O!d4
* (non-Javadoc) !y b06Z\f
* B8Fb$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )&1v[]%S
*/ ^H.B6h?
public void sort(int[] data) { /(JG\Ut
int[] temp=new int[data.length]; l{dsm1#W~
mergeSort(data,temp,0,data.length-1); ^\ x'4!W
} fY&TI}Y
#!F>cez
private void mergeSort(int[] data, int[] temp, int l, int r) { "++\6H<
int i, j, k; 1@L18%h
int mid = (l + r) / 2; n/5T{NfG
if (l == r) O.B9w+G=
return; 2/4zg
if ((mid - l) >= THRESHOLD) t<` As6}
mergeSort(data, temp, l, mid); 1;(h0j
else JW[6 ^Rw
insertSort(data, l, mid - l + 1); D-BT`@~l
if ((r - mid) > THRESHOLD) RdPk1?}K
mergeSort(data, temp, mid + 1, r); i4|R0>b
else nm1dd{U6^
insertSort(data, mid + 1, r - mid); [L+*pW+$\.
k4V3.i!E
for (i = l; i <= mid; i++) { ?-)!dl%N
temp = data; k 3m_L-
} [=(8yUV'G
for (j = 1; j <= r - mid; j++) { l9f_NJHo
temp[r - j + 1] = data[j + mid]; OWewV@VXR
} lk 1\|Q I
int a = temp[l]; 53:~a
int b = temp[r]; <8b1OdA
for (i = l, j = r, k = l; k <= r; k++) { (U&
if (a < b) { Np+PUu>
data[k] = temp[i++]; 5bt>MoKxv
a = temp; i6KfH\{N
} else { > mO*.'Gm
data[k] = temp[j--]; pRun5 )7
b = temp[j]; yIKpyyC9H
} >O\+9T@
} CKn2ZL
} _dm0*T ?
&qS%~h%2
/** u$R5Q{H_
* @param data BjfVNF;hk:
* @param l I/njyV)H
* @param i u"qVT9C$=
*/ ]Kq<U%x$
private void insertSort(int[] data, int start, int len) { 9iG&9tB@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C})Dvh
} c`xNTr01
} G"?7 Z&+
} *eoH"UFYQ#
} d/9YtG%q
0]SWyC :
堆排序： ikc1,o
~QbHp|g
package org.rut.util.algorithm.support; P_5aHeiJ
oY^I|FEOz
import org.rut.util.algorithm.SortUtil; Yc]V+NxxQ
K2Abu?
/** /7D5I\
* @author treeroot .JLJ(WM
* @since 2006-2-2 teS>t!d
* @version 1.0 L-w3A:jk
*/ <u\Hy0g
public class HeapSort implements SortUtil.Sort{ b5|*p(7[
#1haq[Uv7
/* (non-Javadoc) HZAT_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C<J*C0vQO
*/ +H3~Infr4f
public void sort(int[] data) { `;}`>!8j
MaxHeap h=new MaxHeap(); B`-uZ9k
h.init(data); Sn*s@RE\s
for(int i=0;i h.remove(); q?7''xk7
System.arraycopy(h.queue,1,data,0,data.length); xZ {6!=4!
} eV*QUjS~
rtS cQ
private static class MaxHeap{ .5Y{Yme
z]N#.utQ
void init(int[] data){ U*a#{C7"
this.queue=new int[data.length+1]; ?IAu,s*u
for(int i=0;i queue[++size]=data; |V\{U j
fixUp(size); Jai]z
} e=(Y,e3
} {'4#{zmp
"]=OR>
private int size=0; uNn1qV
:o^ioX.J
private int[] queue; X&zGgP/
+zMhA p
public int get() { :<P4=P P
return queue[1]; GPHb-
} + -Rf@
6HCg<_j]
public void remove() { Fl.?*KBz
SortUtil.swap(queue,1,size--); V| Fo@
fixDown(1); c)#7T<>*'
} GG>53}7{
file://fixdown ^)9/Wz _x
private void fixDown(int k) { "~ID.G|<
int j; G06;x
while ((j = k << 1) <= size) { F\N0<o
if (j < size %26amp;%26amp; queue[j] j++; 7#C$}1XJ1
if (queue[k]>queue[j]) file://不用交换 \L(jNN0_R
break; }SWfP5D@
SortUtil.swap(queue,j,k); 9!jF$
k = j; I+ |uyc
} d\#yWY
} F8?,}5j
private void fixUp(int k) { f0g/`j@Up
while (k > 1) { n@+?tYk*e
int j = k >> 1; .eIs$
if (queue[j]>queue[k]) g5|&6+t.
break; HVA:|Z19
SortUtil.swap(queue,j,k); qe&|6M!
k = j; '|]}f}Go
} M%_*vD
} !f(A9V
}T.>p#z
} $Zyuhji^
}'Ap@4
} B`QF;,3S
U=JK
SortUtil： 9c]$d
H&ek"nP_
package org.rut.util.algorithm; C2R"96M7q
>e!J(4.-
import org.rut.util.algorithm.support.BubbleSort; dE8f?L'
import org.rut.util.algorithm.support.HeapSort; Kv* 1=HES
import org.rut.util.algorithm.support.ImprovedMergeSort; #6c,_!
import org.rut.util.algorithm.support.ImprovedQuickSort; SHYekX
import org.rut.util.algorithm.support.InsertSort; g"n>v c7
import org.rut.util.algorithm.support.MergeSort; TFb7P/g
import org.rut.util.algorithm.support.QuickSort; ]7<$1ta
import org.rut.util.algorithm.support.SelectionSort; B)7:*Kj
import org.rut.util.algorithm.support.ShellSort; 8WDL.IO
s;P _LaIp)
/** }BS EK<W
* @author treeroot vfqXHc unj
* @since 2006-2-2 ^?fsJ
* @version 1.0 oU1N>,
*/ VJ-t#q"
public class SortUtil { Po=:-Of:
public final static int INSERT = 1; ,9G'1%z,
public final static int BUBBLE = 2; xytWE:=
public final static int SELECTION = 3; H9jlp.F
public final static int SHELL = 4; {G=>WAXo
public final static int QUICK = 5; 'KmM%tN
public final static int IMPROVED_QUICK = 6; 8-+# !]
public final static int MERGE = 7; ]uhG&: }
public final static int IMPROVED_MERGE = 8; $xW9))
public final static int HEAP = 9; GjEV]hqR
C4E}.``Hm
public static void sort(int[] data) { \68bXY.
sort(data, IMPROVED_QUICK); ):G+*3yb
} W:<2" &7
private static String[] name={ ;gEEdx'&T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ow?~+) 4
}; R{brf6,
O(evlci
private static Sort[] impl=new Sort[]{ -U>)B
new InsertSort(), rYPuo
new BubbleSort(), c)Q-yPMl)
new SelectionSort(), &56\@t^
new ShellSort(), =S54p(>
new QuickSort(), B[sI7D>Y
new ImprovedQuickSort(), evEdFY
new MergeSort(), S~ckIN]
new ImprovedMergeSort(), N*m;A6?
new HeapSort() Jyd[Sc)
}; {>9<H]cSP
w,6gnO
public static String toString(int algorithm){ S8;c0}-
return name[algorithm-1]; uUaDesz~=
} ax _v+v %
dn~k_J=p
public static void sort(int[] data, int algorithm) { W"/,<xHuh
impl[algorithm-1].sort(data); #lFsgb
} 1^hG}#6_
s;<]gaonB_
public static interface Sort { ?jO<<@*2S
public void sort(int[] data); c;b<z|}z
} f~?5;f:E
Yc[vH=gV}
public static void swap(int[] data, int i, int j) { p&(z'd
int temp = data; mtFC H
data = data[j]; +tkm,>s
data[j] = temp; #?M[Q:
} p/ZgzHyF
} sn[<Lq