[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; ;Y0M]pC
} W4UK?#S+
int i1=l; {@6:kkd
int i2=mid+1; p6!5}dD(
for(int cur=l;cur<=r;cur++){ t&Q(8Hz
if(i1==mid+1) <cU%yA710
data[cur]=temp[i2++]; Tl2(%qB
else if(i2>r) =#=}|Q}
data[cur]=temp[i1++]; 5?Pf#kq
else if(temp[i1] data[cur]=temp[i1++]; @)U;hk)j;
else F?[1m2
data[cur]=temp[i2++]; )FNn
} 83 <CDjD
} HQ]mDo
c0Pj})-
} 05g %5vHF
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改进后的归并排序: @dx8{oQ
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package org.rut.util.algorithm.support; 7Mk>`4D'c
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import org.rut.util.algorithm.SortUtil; *jvP4Nz)k
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/** <ZheWl
* @author treeroot @<`V q
* @since 2006-2-2 z%#-2&i
* @version 1.0 L^*f$Balz
*/ 1\~I "$}
public class ImprovedMergeSort implements SortUtil.Sort { Va?i#<a
ZZ Hjv
private static final int THRESHOLD = 10; 7F2 RH 8)
` Nf
/* I=:"Fqj'N
* (non-Javadoc) |L`U2.hb
* <bb!BS&w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >I/@GX/
*/ ;!G#Y Oe
public void sort(int[] data) { 6aOyI;Ux
int[] temp=new int[data.length]; /QWXEL/M=
mergeSort(data,temp,0,data.length-1); Y[]I!Bc
} ^RO<r}Bu
heL`"Y2'y>
private void mergeSort(int[] data, int[] temp, int l, int r) { PpKjjA<
int i, j, k; 0G6aF"
int mid = (l + r) / 2; qajZ~oB{
if (l == r) Wy}^5]R0E
return; 3E^qh03(
if ((mid - l) >= THRESHOLD) n}_}#(a
mergeSort(data, temp, l, mid); 2Z%n "z68
else w^Yo)"6
insertSort(data, l, mid - l + 1); xT]t3'y|-
if ((r - mid) > THRESHOLD) yo/;@}g}
mergeSort(data, temp, mid + 1, r); g'b|[ q
else K4jHha
insertSort(data, mid + 1, r - mid); &a=78Z
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for (i = l; i <= mid; i++) { e5 L_<V^Jo
temp = data; &l3(+4Sh
} ?_d6;
for (j = 1; j <= r - mid; j++) { w;yzgj:n&f
temp[r - j + 1] = data[j + mid]; R~T}
} _dRB=bl"O
int a = temp[l]; VnVBA-#r|
int b = temp[r]; ^3BPOK[*gB
for (i = l, j = r, k = l; k <= r; k++) { Jx~H4y=z
if (a < b) { .|^Gde
data[k] = temp[i++]; ,dR.Sacv
a = temp; z=) m6\
} else { V:'F_/&X?
data[k] = temp[j--]; q)L4*O
b = temp[j]; LXh}U>a9
} A&)2m
} cM3B5Lp
} Q"C*j'n
`YC7+`q
/** tE_n>~Zs
* @param data ;cvMNU$fN
* @param l | bRU=dg
* @param i Ht4O5yl"
*/ $8rnf
private void insertSort(int[] data, int start, int len) { X=KW >
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^)?Wm,{"w
} Te L&6F$
} 1P(=0\P>&
} @B(oq1i@
} 8T9s:/%
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堆排序： v:/\;2
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package org.rut.util.algorithm.support; Fz';H
6ICW>#fI`
import org.rut.util.algorithm.SortUtil; !#_2 ![
~qj(&[U{c\
/** ,c|MB
* @author treeroot 't}\U&L.{
* @since 2006-2-2 .FHk1~\%z^
* @version 1.0 G@#lf@M]
*/ ofV0L
public class HeapSort implements SortUtil.Sort{ F`m}RL]g
Mq)]2>"v
/* (non-Javadoc) %L*EB;nK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Ym_ {
*/ Q;8z&4s@
public void sort(int[] data) { MGsQF#6]
MaxHeap h=new MaxHeap(); 05R"/r*
h.init(data); myR{}G
for(int i=0;i h.remove(); H" `'d
System.arraycopy(h.queue,1,data,0,data.length); fMg9h9U
} dh7`eAMY
zUL,~u
private static class MaxHeap{ QF/_?Tm4
zP%s]>hH
void init(int[] data){ gAWi&
this.queue=new int[data.length+1]; XJ\R'?j
for(int i=0;i queue[++size]=data; DOJydYds
fixUp(size); =yZq]g6Q
} Zh;wQCDj
} }W8A1-UF
B6 (\1
private int size=0; #4O4,F>e
ah:["< z<
private int[] queue; b(GV4%
dT*Yv`h
public int get() { H5x7)1Ir|
return queue[1]; Kh\ 7%>K#
} UgGa]b[9A
'wk,t^)
public void remove() { ?'6@m86d
SortUtil.swap(queue,1,size--); I?}jf?!oM
fixDown(1); ;,[0bmL
} v#qdq!64
file://fixdown KJ'ID
private void fixDown(int k) { qx5`lm~L
int j; i`2SebDj'w
while ((j = k << 1) <= size) { c%/b*nQ(=
if (j < size %26amp;%26amp; queue[j] j++; >|A,rE^Ojt
if (queue[k]>queue[j]) file://不用交换 S[3"?$3S
break; ,~naKd.ZY
SortUtil.swap(queue,j,k); g=$U&Hgs
k = j; 8xO
} \,G9'c 'u
} 1;$XX#7o
private void fixUp(int k) { aYaEy(m
while (k > 1) { -i:WA^yKgw
int j = k >> 1; dYrgL3'
if (queue[j]>queue[k]) ud`-w
break; ]##aAh-P4&
SortUtil.swap(queue,j,k); hU""YP~y
k = j; 9KU&M"Yq&i
} /ovVS6Ai
} d-_V*rYU
X?'cl]1?
} +_7a/3kh
f"FFgQMkv
} z9ADF(J?0'
>n09K8 A
SortUtil： Jx.fDVJ
am]M2+,2Ip
package org.rut.util.algorithm; 3@I0j/1#k1
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import org.rut.util.algorithm.support.BubbleSort; -j3Lgm
import org.rut.util.algorithm.support.HeapSort; CK7([>2
import org.rut.util.algorithm.support.ImprovedMergeSort; gQ{ #C'
import org.rut.util.algorithm.support.ImprovedQuickSort; rpRyB9
import org.rut.util.algorithm.support.InsertSort; v;<gCzqQh
import org.rut.util.algorithm.support.MergeSort; ;bB#Pg
import org.rut.util.algorithm.support.QuickSort; }CBQdH&g;
import org.rut.util.algorithm.support.SelectionSort; ?z9!=A%<V~
import org.rut.util.algorithm.support.ShellSort; Pz2 b
wu.l-VmGp)
/** tr<fii3<
* @author treeroot `HRL .uX
* @since 2006-2-2 e%JIqKS
* @version 1.0 eT".psRiC
*/ K|Sq_/#+U
public class SortUtil { *,$5EN
public final static int INSERT = 1; cb9-~*1
public final static int BUBBLE = 2; ?.VKVTX^
public final static int SELECTION = 3; 4[$:KGh3
public final static int SHELL = 4; _U^[h!
public final static int QUICK = 5; ~9+01UU^
public final static int IMPROVED_QUICK = 6; 4$KDf;m@
public final static int MERGE = 7; tS2&S 6u
public final static int IMPROVED_MERGE = 8; (kLaXayn
public final static int HEAP = 9; @-)?uYw:r
^y/Es2A#t
public static void sort(int[] data) { * hs&^G
sort(data, IMPROVED_QUICK); DU%E883
} $IE}fgA@5
private static String[] name={ Z0L($
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AabQ)23R2
}; =PRQ3/?5
P5<9;PPbZ
private static Sort[] impl=new Sort[]{ A O:F*%Q u
new InsertSort(), c#N4XsG,
new BubbleSort(), lr>NG,N
new SelectionSort(), [ey# ,&T
new ShellSort(), `MI;.t
new QuickSort(), uB I/3aQ
new ImprovedQuickSort(), g{]6*`/Z
new MergeSort(), r1r$y2v~
new ImprovedMergeSort(), eyMn! a
new HeapSort() a*cWj}u
}; ^+P.f[
$ZI]
public static String toString(int algorithm){ o`S``?`^)^
return name[algorithm-1]; xQFY/Z
} {^dq7!
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public static void sort(int[] data, int algorithm) { xfb .Z(
impl[algorithm-1].sort(data); i&:SWH=
} x []ad"R
@ 8H$
public static interface Sort { |c/=9Bb
public void sort(int[] data); z{W Cw
} U*C^g}iA
d0 )725Ia
public static void swap(int[] data, int i, int j) { zIrOMh
int temp = data; nc;eNB
data = data[j]; C1D:Xi-
data[j] = temp; y47N(;vy
} jB?SX
} w.x&3aG