[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; RGvfy/T
} [Zc8tE2oN
int i1=l; /@-!JF#g
int i2=mid+1; Ey7SQb
for(int cur=l;cur<=r;cur++){ w'E&w)Z]
if(i1==mid+1) S)ZcH
data[cur]=temp[i2++]; h3U| ~h
else if(i2>r) Ry9kGdqO
data[cur]=temp[i1++]; CmKbpN*
else if(temp[i1] data[cur]=temp[i1++]; |X@ZM
else LPO:Ka
data[cur]=temp[i2++]; =0!PnBGYn
} f*U3s N^y
} %>u(UmFO
o|FjNL
} Hy}oSy26
30 e>C
改进后的归并排序: AlF"1X02
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package org.rut.util.algorithm.support; =wbgZr^2
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import org.rut.util.algorithm.SortUtil; NbnahhS
LCKCg[D
/** 1$nlRQi
* @author treeroot 4+Aht]$hC
* @since 2006-2-2 }EM vEA
* @version 1.0 Q{FK_Mv<
*/ :98<dQIG
public class ImprovedMergeSort implements SortUtil.Sort { W !TnS/O_1
9n\:grW
private static final int THRESHOLD = 10; =Ts2a"n
8[@aX;I
/* t+7|/GLs2
* (non-Javadoc) IL*Ghq{/
* .=@xTJh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |hHj7X<?k
*/ !7)` g i
public void sort(int[] data) { !C ]5_
int[] temp=new int[data.length]; x -CTMKX
mergeSort(data,temp,0,data.length-1); fL-lx-~
} vKrOIBP
Ed">$S
private void mergeSort(int[] data, int[] temp, int l, int r) { FO[x c;
int i, j, k; ]k0Pe;<
int mid = (l + r) / 2; .tRp
if (l == r) vlW521
return; F_C7S
if ((mid - l) >= THRESHOLD) \mGx-g6
mergeSort(data, temp, l, mid); N>a. dYXr
else wg-qq4Q\
insertSort(data, l, mid - l + 1); lQ5d.}O&
if ((r - mid) > THRESHOLD) barY13)$U
mergeSort(data, temp, mid + 1, r); 04o>POR
else 'c]Fhe fb
insertSort(data, mid + 1, r - mid); 5B:%##Ug5
7dxe03h
for (i = l; i <= mid; i++) { 7\;4 d4u
temp = data; /2s=;tA1
} ([g[\c,H
for (j = 1; j <= r - mid; j++) { A[7\!bq5
temp[r - j + 1] = data[j + mid]; 9K4]~_%h\
} ^$>Q6.x?*)
int a = temp[l]; #3~#`&
int b = temp[r]; :}B=Bk/q
for (i = l, j = r, k = l; k <= r; k++) { u)X]]6YJ
if (a < b) { ?:$aX@r
data[k] = temp[i++]; |!Uul0O
a = temp; l.>3gjr
} else { fpPB_P{Ua
data[k] = temp[j--]; P* Z1Rs_
b = temp[j]; \86:f<)P
} \3bT0^7B
} " J4?Sb<
} Kb$6a'u7
c'!+]'Lr
/** :q>uj5%
* @param data YqQAogyh
* @param l S\poa:D`
* @param i |a|##/
*/ .Ce0yAl~
private void insertSort(int[] data, int start, int len) { j9sLR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LlF|VR&P.
} yDORL| E'
} 1m{c8Z.h/d
} [G<SAWFg7
} N5F+h94z]
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堆排序： =XhxD<kI
4#Rq}/h
package org.rut.util.algorithm.support; aYmN' POi
L?&Trq7i
import org.rut.util.algorithm.SortUtil; %;ZDw@_<
)VM'^sV?
/** 4yDWVd;
* @author treeroot +eVm+4WK
* @since 2006-2-2 "t>WM
* @version 1.0 5uAUi=XA>S
*/ /I@`B2
public class HeapSort implements SortUtil.Sort{ Fu*Qci1Z
>U#j\2!Sg
/* (non-Javadoc) z#Cgd-^7.#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {SJnPr3R
*/ rXF=/
public void sort(int[] data) { qG8-UOUDt
MaxHeap h=new MaxHeap(); @sG5Do
h.init(data); 'Im&&uSkr
for(int i=0;i h.remove(); ;yDXo\gm
System.arraycopy(h.queue,1,data,0,data.length); *<l9d
} +]S!pyZ"
G&,2>qxKR
private static class MaxHeap{ NVG`XL
?t"bF:!
void init(int[] data){ VK/i5yT5N
this.queue=new int[data.length+1]; V?C_PMa
for(int i=0;i queue[++size]=data; q,fk@GI'2
fixUp(size); 1IeB_t
} qp`G5bw
} 3@^b's'S|}
L~} 2&w
private int size=0; _^Lg}@t
.,( ,<
private int[] queue; xx EcmS#>
]qNPOnlp
public int get() { Oo`b#!L
return queue[1]; Rss=ihlM
} ko<VB#pOMr
n$YCIW)0
public void remove() { x|IG'R1:Y
SortUtil.swap(queue,1,size--); #Cz6c%yK
fixDown(1); 8- ]7>2?_
} 5jBBk*/\
file://fixdown m[!AOln)
private void fixDown(int k) { &m>txzo
int j; ?$\y0lHw/7
while ((j = k << 1) <= size) { *3We5
if (j < size %26amp;%26amp; queue[j] j++; 8L}N,6gC4_
if (queue[k]>queue[j]) file://不用交换 #p^r)+\3=
break; vy+9Q5@W
SortUtil.swap(queue,j,k); ^iwM(d]#5
k = j; Ch9A6?=Hj8
} hhvP*a_J
} *tZ#^YG{(
private void fixUp(int k) { G$HLta
while (k > 1) { |Zo_x}0
int j = k >> 1; )iG+pP@.@
if (queue[j]>queue[k]) |uE_aFQs
break; P$|DiiH
SortUtil.swap(queue,j,k); I#tEDeF2
k = j; L5*,l`lET
} _\Cd.
} lC|{{?m
NR)[,b\v
} d#eHX|+
i#~1|2
} UVD::
S hM}w/4
SortUtil： 3*gWcPGe
q61 rNOw_
package org.rut.util.algorithm; u?f3&pA
=`X;fz
import org.rut.util.algorithm.support.BubbleSort; uGQCW\!"4
import org.rut.util.algorithm.support.HeapSort; 6]}Xi:I
import org.rut.util.algorithm.support.ImprovedMergeSort; NOa.K)^k
import org.rut.util.algorithm.support.ImprovedQuickSort; NW9k.D%
import org.rut.util.algorithm.support.InsertSort; u[jdYWQa
import org.rut.util.algorithm.support.MergeSort; >P=xzg79
import org.rut.util.algorithm.support.QuickSort; ::vw1Es
import org.rut.util.algorithm.support.SelectionSort; ^~5tntb.
import org.rut.util.algorithm.support.ShellSort; Sg<''pUh
V_(?mC
/** 6iFd[<.*j
* @author treeroot I#Tl
* @since 2006-2-2 ZH%[wQ~4
* @version 1.0 fXw%2wg
*/ &fj&UBA
public class SortUtil { _V{WXsOx(
public final static int INSERT = 1; l{Hi5x'H
public final static int BUBBLE = 2; AX1'.
public final static int SELECTION = 3; \FTvN
public final static int SHELL = 4; 'EREut,>'
public final static int QUICK = 5; (U`7[F
public final static int IMPROVED_QUICK = 6; 5H 1(C#|
public final static int MERGE = 7; SQ5*?u\
public final static int IMPROVED_MERGE = 8; W{;!JI7;z
public final static int HEAP = 9; (p14{
z<<` 1wqg
public static void sort(int[] data) { de1&
sort(data, IMPROVED_QUICK); @R2|=ox
} {=g-zsc]K
private static String[] name={ V6$v@Zq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u'K<-U8H
}; ]NAPvw#p
2z[Pw0#V
private static Sort[] impl=new Sort[]{ \k1Wh-3
new InsertSort(), dIO\ lL
new BubbleSort(), RL&3 P@r
new SelectionSort(), jSYj+k
new ShellSort(), F'j:\F6C;
new QuickSort(), Y,(eu*Za
new ImprovedQuickSort(), *h =7:*n
new MergeSort(), ',!#?aGV
new ImprovedMergeSort(), iD(K*[;lc
new HeapSort() bY>o%LL-
}; 5h> gz
iqoPD4A
public static String toString(int algorithm){ E?XA/z !
return name[algorithm-1]; <m(nZ'Zqz2
} p-7dJ
E>g'!
public static void sort(int[] data, int algorithm) { kcYR:;y
impl[algorithm-1].sort(data); W;-Qze\D
} bm+ Mr
QHM39Eu]
public static interface Sort { 2d>PN^x
public void sort(int[] data); UJm`GO
} W"Rii]GK"
=;{S>P!I(t
public static void swap(int[] data, int i, int j) { r=w%"3vb^
int temp = data; k{bba=<
data = data[j]; !c&^b@ yw
data[j] = temp; FCe503qND$
} N4Lk3]
} OKU P