[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; 3u^TJt)
} (wfg84
int i1=l; p\WUk@4
int i2=mid+1; 7S`H?},sR
for(int cur=l;cur<=r;cur++){ B<R-|-#
if(i1==mid+1) hmH$_YP}
data[cur]=temp[i2++]; qWFg~s#+
else if(i2>r) cTnbI4S;
data[cur]=temp[i1++]; Y'5ck(
else if(temp[i1] data[cur]=temp[i1++]; LZVO9e]
else GCKl[<9*
data[cur]=temp[i2++]; US|vYd}u+
} _#O?g=1
} FCWphpz
JW\"S
} |-fx 0y
fh^_=R(/
改进后的归并排序: O2G+ '
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package org.rut.util.algorithm.support; ,7(/Il9
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import org.rut.util.algorithm.SortUtil; $-RhCnE
9zyN8v2
/** *K(xES!b
* @author treeroot 1I`D$Xq~:
* @since 2006-2-2 07|NPS
* @version 1.0 B<LavX>F
*/ %&XX*& q
public class ImprovedMergeSort implements SortUtil.Sort { kTz
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private static final int THRESHOLD = 10; rd))H
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/* eFQi K6`i
* (non-Javadoc) 4Le5Ms/
* Z|c9%.,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lvq]SzOw
*/ FQFENq''B
public void sort(int[] data) { ej;taKzj
int[] temp=new int[data.length]; pJz8e&wyLM
mergeSort(data,temp,0,data.length-1); {yHfE,
} L\ %_<2
~@8d[Tb
private void mergeSort(int[] data, int[] temp, int l, int r) { C=IH#E=
int i, j, k; ?C:fP`j:
int mid = (l + r) / 2; kA4ei
if (l == r) ~@D%qbN
return; 6bcrPf}
if ((mid - l) >= THRESHOLD) <.b$ gX
mergeSort(data, temp, l, mid); |S{P`)z%f
else lF(!(>YZ
insertSort(data, l, mid - l + 1); /wE_eK.
if ((r - mid) > THRESHOLD) }|Tg_+
mergeSort(data, temp, mid + 1, r); LrMFzd}_O
else Wu( 8G
insertSort(data, mid + 1, r - mid); `tG_O
s vb4uvY
for (i = l; i <= mid; i++) { s8[9YfuW
temp = data; 4C%>/*%8>
} ^-u HdafP
for (j = 1; j <= r - mid; j++) { w<Cmzkf
temp[r - j + 1] = data[j + mid]; rcx;3Vne
} S I7B6c
int a = temp[l]; P|4E1O
int b = temp[r]; DA$Q-
for (i = l, j = r, k = l; k <= r; k++) { KeI:/2
if (a < b) { Db=>7@h3C
data[k] = temp[i++]; S=,1} XZ
a = temp; J'yN' 0
} else { 'w[d^L
data[k] = temp[j--]; "t:.mA<v
b = temp[j]; fVUBCu
} k6'#
} 1fW4=pF-K
} Rr4CcM
/]zib@i
/** 4~A#^5J
* @param data 6 ]PM!6
* @param l m5w9l"U]H
* @param i 9K46>_TyH
*/ I~LQ1_
private void insertSort(int[] data, int start, int len) { F/*fQAa"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }Tr83B|
} x7Rq|NQ
} t;dQ~e20
} s}#[*WOc
} IS2Ij
s~Wu0%])Q
堆排序： ; axaZV
K#UA M.
package org.rut.util.algorithm.support; -`dxx)x
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import org.rut.util.algorithm.SortUtil; fslk7RlSKg
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/** mK40 f
* @author treeroot ^lai!uZVa
* @since 2006-2-2 s.;KVy,=Bu
* @version 1.0 G^rh*cb K
*/ qH%L"J
public class HeapSort implements SortUtil.Sort{ 5u)^FIBj
{0vbC/?]
/* (non-Javadoc) EO/cW<uV'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (U'7Fc
*/ z]l-?>Zbg
public void sort(int[] data) { V87ee,
MaxHeap h=new MaxHeap(); i %hn
h.init(data); t+!gzZ
for(int i=0;i h.remove(); <]Pix)
System.arraycopy(h.queue,1,data,0,data.length); O\?5#.
} vQYfoam;
_`@Xy!Ye
private static class MaxHeap{ +z(,A
m0A@jWgd
void init(int[] data){ B#GZmv1
this.queue=new int[data.length+1]; !qXq y}?w
for(int i=0;i queue[++size]=data; GQ-e$D@SfB
fixUp(size); 0|s$vqc
} ?X_0Iy}1
} )_b@~fC
'5xuT _
private int size=0; Ec*--]j*c
$qlqWy-s
private int[] queue; p=-B~:
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public int get() { F0BOhlK
return queue[1]; Tc3ih~LvG
} z<[.MH`ln
U.pr} hq
public void remove() { @0UwI%.
SortUtil.swap(queue,1,size--); 8?j&{G
fixDown(1); ;sL6#Go?V
} QVSsi j
file://fixdown -wtTq ph'
private void fixDown(int k) { p*AP 'cR
int j; 7o965h
while ((j = k << 1) <= size) { @8M'<tr<z
if (j < size %26amp;%26amp; queue[j] j++; |P. =
if (queue[k]>queue[j]) file://不用交换 n$hqNsM
break; HV*:<2P%D
SortUtil.swap(queue,j,k); vN0L(B
k = j; a(x.{}uG,
} }uvKE|umj
} &Qtp"#{
private void fixUp(int k) { f=_Bx2ub
while (k > 1) { b#Fk>j
int j = k >> 1; M=\d_O#;Z
if (queue[j]>queue[k]) (iCZz{l@~
break; Nn,vdu{^2
SortUtil.swap(queue,j,k); K{=r.W
k = j; [I++>4
} 7dufY }}
} S& ,Ju%
=p,4=wo{
} =0s`4Y"+
*%Nns',
} '{j\0
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SortUtil： ]s*[Lib
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package org.rut.util.algorithm; uFrJ:l+
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import org.rut.util.algorithm.support.BubbleSort; U9@t?j_#X{
import org.rut.util.algorithm.support.HeapSort; Lem\UD$D`
import org.rut.util.algorithm.support.ImprovedMergeSort; (:&&;]sI
import org.rut.util.algorithm.support.ImprovedQuickSort; X|-v0 f
import org.rut.util.algorithm.support.InsertSort; (5Z8zNH`3
import org.rut.util.algorithm.support.MergeSort; >tmnj/=&
import org.rut.util.algorithm.support.QuickSort; S<y>Y
import org.rut.util.algorithm.support.SelectionSort; I5TQ>WJbf
import org.rut.util.algorithm.support.ShellSort; u:AfHZ
.fLiXx
/** vy{rwZ$
* @author treeroot x%IXwP0
* @since 2006-2-2 1*!c X
* @version 1.0 dr,B\.|jC
*/ D% v:PYf
public class SortUtil { FhY{;-W(T
public final static int INSERT = 1; ]Efh(Gb]
public final static int BUBBLE = 2; +?"HTDBE||
public final static int SELECTION = 3; #|{BGVp
public final static int SHELL = 4; i_[ HcgT-
public final static int QUICK = 5; Q8;x9o@p
public final static int IMPROVED_QUICK = 6; F1?CqN M
public final static int MERGE = 7; Ks49$w<
public final static int IMPROVED_MERGE = 8; j{Yt70Wv
public final static int HEAP = 9; YZ"+c&V"
8CP9DS
public static void sort(int[] data) { 80FCe(U
sort(data, IMPROVED_QUICK); ]b0zkoD9<
} nu469
private static String[] name={ t5ny"k!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IKMsY5i
}; 36kc4=
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private static Sort[] impl=new Sort[]{ 6o[0sM_];
new InsertSort(), xE G+%Uk{
new BubbleSort(), |MOn0*
new SelectionSort(), Xmf
new ShellSort(), dl*_ m3T
new QuickSort(), u|_LR5S!j
new ImprovedQuickSort(), kz7vbY
new MergeSort(), 2cs?("8e%
new ImprovedMergeSort(), aJK-O"0/
new HeapSort() S 0R8'Y
}; [Vrc:%Jk
;-3h~k
public static String toString(int algorithm){ i63`B+L{
return name[algorithm-1]; 9_J!s
} N<L$gw+)$D
c*S#UD+
public static void sort(int[] data, int algorithm) { 5}-)vsa`
impl[algorithm-1].sort(data); `YFkY^T
} "J]f0m=
4 o3)*
public static interface Sort { 6T^N!3p_
public void sort(int[] data); oJlN.Q#u&
} a-T*'F
O tXw/
public static void swap(int[] data, int i, int j) { [ E$$nNs
int temp = data; zVp[YOS&c
data = data[j]; ) >>u|#@z
data[j] = temp; 92P,:2`a
} 3n.+_jQ>s
} th.M.jas