[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; }Bk>'
} @#u'z~a)
int i1=l; {7F?30: ]
int i2=mid+1; 6'Sq|@VOi
for(int cur=l;cur<=r;cur++){ :o37 V!
if(i1==mid+1) +cXdF
data[cur]=temp[i2++]; y [jck:
else if(i2>r) Aq]*$s2\G
data[cur]=temp[i1++]; @Z+(J:Grm5
else if(temp[i1] data[cur]=temp[i1++]; vV$6fvS
else $!LL
data[cur]=temp[i2++]; +uqP:z
} F/ si =%
} pw, <0UhV
:Vnus @#r
} w]ihGh
)@\Eibt2oH
改进后的归并排序: ABG>W>H-S
rCH? R
package org.rut.util.algorithm.support; 1EmZ/@k/Y
*K#Ci1Q
import org.rut.util.algorithm.SortUtil; o[Gp*o\
_~}n(?>
/** }f;cA
* @author treeroot 26[.te9
* @since 2006-2-2 h.t2;O,b
* @version 1.0 #cCR\$-~
*/ <jz\U7TBf
public class ImprovedMergeSort implements SortUtil.Sort { Yn>y1~
b0:5i<"w6
private static final int THRESHOLD = 10; {Gi:W/jJ
znq/ %7
/* -]Mbe2;
* (non-Javadoc) KQulz
* [g Y.h/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k62KZ5| D
*/ @ak3ZNor
public void sort(int[] data) { 8|2I/#F}]
int[] temp=new int[data.length]; }uo.N
mergeSort(data,temp,0,data.length-1); `21$e
} G5Z_[Q~z
j0(+Kq:J
private void mergeSort(int[] data, int[] temp, int l, int r) { X"fSM #
int i, j, k; K/A1g.$
int mid = (l + r) / 2; fa#5pys
if (l == r) U#gv ~)\k
return; d>bS)
if ((mid - l) >= THRESHOLD) wM0P#+bA\
mergeSort(data, temp, l, mid); L9bIdiB7
else dk@j!-q^
insertSort(data, l, mid - l + 1); .!2Ac
if ((r - mid) > THRESHOLD) JQO%-=t
mergeSort(data, temp, mid + 1, r); ) mG
else Xxmvg.Nl
insertSort(data, mid + 1, r - mid); OE8H |?%
nNP{>\x;"
for (i = l; i <= mid; i++) { k<.VR"I p
temp = data; @'lO~i
} no UXRQ
for (j = 1; j <= r - mid; j++) { 8 aC]" C
temp[r - j + 1] = data[j + mid]; R2B0?fu
} ptCAtEO72
int a = temp[l]; ;Y@"!\t}
int b = temp[r]; zKf.jpF^
for (i = l, j = r, k = l; k <= r; k++) { D Kng.P
if (a < b) { )an,-EIX%
data[k] = temp[i++]; V+dFL9
a = temp; =7P(T`j
} else { ^hIKDc!.m
data[k] = temp[j--]; 4SGF8y@WU
b = temp[j]; t=6Wk4
} lKA2~o
} $@}\T
} ZnXq+^Z4
jPyhn8Vw
/** KX$Q`lM
* @param data 'X]my
* @param l 2I qvd
* @param i wJb"X=i*
*/ {z0PB] U
private void insertSort(int[] data, int start, int len) { M hJ;)(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EVE<LF?
} }29Cm$p
} *s}j:fJ
} r<XlIi
} I]B[H6
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堆排序： cd?arIV5
Z`97=:W
package org.rut.util.algorithm.support; |@lVFEl]
:eR[lR^4*
import org.rut.util.algorithm.SortUtil; +E-f
WC ZDS>
/** uL[%R2
* @author treeroot :1(UC}v
* @since 2006-2-2 7iM;X2=7}
* @version 1.0 %m0x]
*/ 69tT'U3vb$
public class HeapSort implements SortUtil.Sort{ l0g`;BI_
Da WzQe=
/* (non-Javadoc) /c9%|<O%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1WbawiG}
*/ BH$+{rZ8t
public void sort(int[] data) { jy2@t*
MaxHeap h=new MaxHeap(); B$kp\yL
h.init(data); f8X/kz
for(int i=0;i h.remove(); YkqauyV^
System.arraycopy(h.queue,1,data,0,data.length); @Tl!A1y?
} D|BP]j}6
Qx%]u8s
private static class MaxHeap{ W;9Jah.
%G>|u/:U
void init(int[] data){ k3FpD=N
this.queue=new int[data.length+1]; x[i Et%_
for(int i=0;i queue[++size]=data; ^FZ7)T
fixUp(size); t1h2ibO
} TPeBb8v8D
} {cF>,T
OJH:k~]0!
private int size=0; 6"UL+$k
dS[="Set
private int[] queue; c?1:='MC
xw%'R-
public int get() { %hqhi@q#
return queue[1]; NA`EG,2
} xK8R![x
$={WtR
public void remove() { [va7+=[1=
SortUtil.swap(queue,1,size--); t<Z)D0.
fixDown(1); \p&a c&]
} }:5>1FfX=
file://fixdown ;*8nd-\
private void fixDown(int k) { F< #!83*%
int j; mp x/~`c
while ((j = k << 1) <= size) { Q(e3-a
if (j < size %26amp;%26amp; queue[j] j++; 0Q_@2
if (queue[k]>queue[j]) file://不用交换 <(%cb.^c=N
break; ErDt~FH
SortUtil.swap(queue,j,k); )5M9Ro7
k = j; /`Wd+
} Hx]{'?
} G$buZspL'd
private void fixUp(int k) { 389puDjy
while (k > 1) { `*1059
int j = k >> 1; @Fl&@ $
if (queue[j]>queue[k]) 4gNF;
break; Cq0S8Or0
SortUtil.swap(queue,j,k); H@8g 9;+
k = j; ;_^"}
} (n~e2tZ/
} 7 i|_PP_
;7]Q'N
} G*f5B
2 #+g4
} VK)K#!O8
[-bT_X
SortUtil： vKX $Nf
wPl!}HNf
package org.rut.util.algorithm; Qs*6wF
M!s@w%0?'
import org.rut.util.algorithm.support.BubbleSort; \q8D7/q
import org.rut.util.algorithm.support.HeapSort; :_qgpE<
import org.rut.util.algorithm.support.ImprovedMergeSort; >Tm|}\qEb
import org.rut.util.algorithm.support.ImprovedQuickSort; zJfoU*G/B
import org.rut.util.algorithm.support.InsertSort; TZ7{cekQ
import org.rut.util.algorithm.support.MergeSort; t: =
import org.rut.util.algorithm.support.QuickSort; "lp),
import org.rut.util.algorithm.support.SelectionSort; srN>pO8u~
import org.rut.util.algorithm.support.ShellSort; #6tb{ws3
ly d[GfJ
/** ;5P>R[p
* @author treeroot tN5brf
* @since 2006-2-2 Rp2~d
* @version 1.0 FJN,er~T[
*/ jnK8 [och
public class SortUtil { kd9GHN;7
public final static int INSERT = 1; Ge|& H]W
public final static int BUBBLE = 2; 1{-W?n
public final static int SELECTION = 3; _cZ`7]Z
public final static int SHELL = 4; !8|]R
public final static int QUICK = 5; up~l4]b+
public final static int IMPROVED_QUICK = 6; X`ifjZ9}d
public final static int MERGE = 7; t:X[Blw3$
public final static int IMPROVED_MERGE = 8; GLe(?\Ug=
public final static int HEAP = 9; )y7SkH|
AUnRr+o
public static void sort(int[] data) { [G/q*a:K
sort(data, IMPROVED_QUICK); H]. 4~ 8
} eXaa'bTx
private static String[] name={ GRC=G&G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \kiCczW_
}; fuQ|[tpvQG
bl>MD8bzLE
private static Sort[] impl=new Sort[]{ Qr;es,f
new InsertSort(), "Yn<]Pa_
new BubbleSort(), 62}bs/%
new SelectionSort(), &Z+a (
new ShellSort(), JlF0L%Rc
new QuickSort(), %<e\s6|P:
new ImprovedQuickSort(), HRx%m1H
new MergeSort(), BEM+FG
new ImprovedMergeSort(), 'nNw
new HeapSort() :5@cjj
}; XHO}(!l\
XbJ=lH
public static String toString(int algorithm){ eBTy!!
return name[algorithm-1]; ^c1I'9(r5
} <ZJ>jZV0*
i&^?p|eKa
public static void sort(int[] data, int algorithm) { G:.Nq,513
impl[algorithm-1].sort(data); kNW&rg
} t%Z_*mIfmE
lX`)Avqa
public static interface Sort { $&m^WrZaY
public void sort(int[] data); nm*!#hx
} $7aRf'
^sq3@*hCw
public static void swap(int[] data, int i, int j) { Kg>+5~+E?q
int temp = data; L_jwM^8
data = data[j]; _Bh-*l?K>
data[j] = temp; o(~>a
} piO+K!C0n:
} c3|;'s