[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; 2&KM&NX~
} 2E_d$nsJ
int i1=l; ~`!{5:v
int i2=mid+1; F&)(G\
for(int cur=l;cur<=r;cur++){ ~7O.}RP0
if(i1==mid+1) g"|/^G_6S
data[cur]=temp[i2++]; N}X7g0>hV
else if(i2>r) %WO4uOi:@
data[cur]=temp[i1++]; #4wia%}u
else if(temp[i1] data[cur]=temp[i1++]; ]]!&>tOlI
else 5o2vj8::
data[cur]=temp[i2++]; y%@C-:
} ;pVnBi
} p)YI8nW
?7cT$/4
} |0s)aV|K
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改进后的归并排序: [l:}#5\]4
n"|1A..^
package org.rut.util.algorithm.support; vfpK|=[7o
tJ9-8ZT*
import org.rut.util.algorithm.SortUtil; x>eV$UJ
bTJ l
/** =DLVWz/<
* @author treeroot cFV3
* @since 2006-2-2 ' "I-! +
* @version 1.0 7CV}QV}G
*/ S0jYk(
public class ImprovedMergeSort implements SortUtil.Sort { 0;n}{26a
p{W'[A{J .
private static final int THRESHOLD = 10; g$9EI\a
%Z!3[.%F
/* Rw]lW;EN<
* (non-Javadoc) A#x_>fV
* 6< @F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MwO`DrV
*/ ~X<Ie9m1x
public void sort(int[] data) { Cs?[
int[] temp=new int[data.length]; ~pG,|\9
mergeSort(data,temp,0,data.length-1); o@@, }
} #J|DW C!#d
!rPU5y*
private void mergeSort(int[] data, int[] temp, int l, int r) { {"n=t`E)3
int i, j, k; `R@b`3*%v
int mid = (l + r) / 2; aZB$%#'vR
if (l == r) o@W:PmKW
return; T.GB*
if ((mid - l) >= THRESHOLD) AH'4k(-
mergeSort(data, temp, l, mid); fUa[3)I
else 4elA<<
insertSort(data, l, mid - l + 1); Jx3fS2
if ((r - mid) > THRESHOLD) ! w2BD^V-
mergeSort(data, temp, mid + 1, r); MVXy)9q
else v|@1W Uc,g
insertSort(data, mid + 1, r - mid); }&Kl)2:O
)9s 6(Iu
for (i = l; i <= mid; i++) { .u\xA7X
temp = data; PCZ%<>v
} i27KuPjC
for (j = 1; j <= r - mid; j++) { P^J#;{R
temp[r - j + 1] = data[j + mid]; D+('1E?
} c!Wj^
int a = temp[l]; rLx'.:
int b = temp[r]; KGNBzy~9
for (i = l, j = r, k = l; k <= r; k++) { T%[!m5
if (a < b) { Z<W`5sop^
data[k] = temp[i++]; o*Kl`3=]
a = temp; .XPPd?R
} else { WR5W0!'Tf
data[k] = temp[j--]; }/g1s71
b = temp[j]; y vo4 .u
} ~?<VT k
} WeE1 \
} 141XnAb)I
M.0N`NmS
/** SPo}!&p$~
* @param data P2=u-{?~
* @param l ew 4pAav
* @param i <0!)}O
*/ cC7&]2X +f
private void insertSort(int[] data, int start, int len) { w i=&W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IW5N^J
} d6+{^v$#
} 5~\GAjf
} %W,V~kb
} {bMOT*X=A
:,1kSM%r
堆排序： ^zVW 3Y q
#xfPobQ>il
package org.rut.util.algorithm.support; &l _NCo2
dA=T+u
import org.rut.util.algorithm.SortUtil; t:yJ~En]=
tq&CJvJ4
/** A_}6J,*u
* @author treeroot 0S$6j-"
* @since 2006-2-2 {<L|Z=&k`
* @version 1.0 '/ *;g#W=
*/ -,^Z5N#\|
public class HeapSort implements SortUtil.Sort{ $@@@</VbP
-cL wjI
/* (non-Javadoc) L2{b~`UvP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <g'0q*qE
*/ x{I, gu|+
public void sort(int[] data) { ZZJ<JdD
MaxHeap h=new MaxHeap(); .kZ<Q]Vk
h.init(data); -PLh|
for(int i=0;i h.remove(); I6RF;m:Jw
System.arraycopy(h.queue,1,data,0,data.length); tde&w=ec
} F%`O$uXA
TDZ p1zpXb
private static class MaxHeap{ KAR **Mp+
#s3R4@{
void init(int[] data){ JYO("f
this.queue=new int[data.length+1]; :BpXi|n;
for(int i=0;i queue[++size]=data; }E&48$0h
fixUp(size); FN"Ye*d
} #Z1 <lAy
} *rv7#!].
MoMxKmI
private int size=0; *(CV OY~
$[{YE[a
private int[] queue; 7Kn}KO!Y8
4'GosQ85
public int get() { W'L
return queue[1]; I/Q~rVt
} xa$4P [
B)=)@h[f
public void remove() { + 3c (CTz
SortUtil.swap(queue,1,size--); `C>De4nT@
fixDown(1); ]y~"M
} H.#zbKj
file://fixdown +!eh\.u|]
private void fixDown(int k) { ;kR+jC(
int j; pz,iQUs_o
while ((j = k << 1) <= size) { ?C*}NM
if (j < size %26amp;%26amp; queue[j] j++; wjfc9z
if (queue[k]>queue[j]) file://不用交换 VX]Ud\(
break; -E>LB\[t)
SortUtil.swap(queue,j,k); _<6B.{$\7m
k = j; `=19iAp.
} zr^"zcfz&
} <P0&!yN
private void fixUp(int k) { ?eOw8Rom
while (k > 1) { Fb<fQIa
int j = k >> 1; 6h{>U*N"&d
if (queue[j]>queue[k]) [,Fu2j]
break; Ob@HzXH
SortUtil.swap(queue,j,k); buA/G-<e
k = j; IyoitIbLl
} u -A_l<K
} wrAcVR
bD<hzOa
} H-jxH,mJmW
K?eY<L
} JGQ)/(
,)Z1&J?
SortUtil： *Z2#U?_
+XpQ9Cd
package org.rut.util.algorithm; \vF*n Z5/
aqKrf(Rv
import org.rut.util.algorithm.support.BubbleSort; rHJtNN8$k
import org.rut.util.algorithm.support.HeapSort; (Z?g^kjq)
import org.rut.util.algorithm.support.ImprovedMergeSort; Dgm"1+
import org.rut.util.algorithm.support.ImprovedQuickSort; (gjCm0#_%
import org.rut.util.algorithm.support.InsertSort; b0uWUI(=
import org.rut.util.algorithm.support.MergeSort; uy8mhB+]
import org.rut.util.algorithm.support.QuickSort; !m6=Us
import org.rut.util.algorithm.support.SelectionSort; s(cC;
import org.rut.util.algorithm.support.ShellSort; W ![*0pL
?$~5ti#\
/** Q&8epO|J
* @author treeroot ; ~#uH7k
* @since 2006-2-2 k`NXYf:
* @version 1.0 :[?65q{
*/ |C}= 1
public class SortUtil { 8RjFp2)W
public final static int INSERT = 1; b/obHB+:
public final static int BUBBLE = 2; Tno 0Q +
public final static int SELECTION = 3; B~47mw&b
public final static int SHELL = 4; A+ LX37B
public final static int QUICK = 5; MTAq}8
public final static int IMPROVED_QUICK = 6; DTz)qHd#X
public final static int MERGE = 7; i^}ib RQbN
public final static int IMPROVED_MERGE = 8; "Zu>cbE
public final static int HEAP = 9; Hgbrlh
9@wmngvM*Y
public static void sort(int[] data) { {;+9A}e
sort(data, IMPROVED_QUICK); /dwj:g0y
} H&uh$y@
private static String[] name={ f J+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (x140_TH~
}; SY$%)(c8kL
%OJq(}
private static Sort[] impl=new Sort[]{ MQq!<?/
new InsertSort(), 2 sK\.yS
new BubbleSort(), <8BNqbX
new SelectionSort(), lt& c/xi_
new ShellSort(), `2,F!kCt
new QuickSort(), ,L-G-V+
new ImprovedQuickSort(), \T {<{<n
new MergeSort(), ca,U>'(y
new ImprovedMergeSort(), +l;AL5h
new HeapSort() b] ~
}; KEo?Cy?%ff
<uvA([r=Vq
public static String toString(int algorithm){ mOntc6&]
return name[algorithm-1]; Lrqe:\
} RKb (
XvIY=~
public static void sort(int[] data, int algorithm) { <`d;>r=4z
impl[algorithm-1].sort(data); ?JMy
} FQM9>l@6)>
jf=\\*64r4
public static interface Sort { E(Zm6~
public void sort(int[] data); zXML<?w
} Ir6g"kwCKq
8K2=WYN
public static void swap(int[] data, int i, int j) { ?u~?:a@K
int temp = data; @P/6NMjZ^
data = data[j]; FY"csZ
data[j] = temp; 3 uJ?;
} 6"/4@?
} 4ZtsLMwLD