[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; **].d;~[l
} j,HUk,e^&
int i1=l; O.ce"5Y^
int i2=mid+1; mBp3_E.t
for(int cur=l;cur<=r;cur++){ 7q%<JZPY
if(i1==mid+1) &}YJ"o[I
data[cur]=temp[i2++]; $]{20"
else if(i2>r) dtXAEL\q
data[cur]=temp[i1++]; \]@XY_21
else if(temp[i1] data[cur]=temp[i1++]; 'dkKBLsx
else V>8)1)dF
data[cur]=temp[i2++]; 3G4N0{i
} ZQ&A'(tt4
} LjE@[@d
`PV+.V}
} P|:*OM p
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改进后的归并排序: ucVWvXCr
hkK+BmMj\
package org.rut.util.algorithm.support; ]bPj%sb*@
k|O?qE1hP
import org.rut.util.algorithm.SortUtil; R')D~JJ<8a
r87)?-B
/** NXJyRAJ*%
* @author treeroot {*X8!P7C
* @since 2006-2-2 @[:JQ'R=
* @version 1.0 `|Ll
*/ zF%'~S0{
public class ImprovedMergeSort implements SortUtil.Sort { +PCsp'D d
pPC_ub
private static final int THRESHOLD = 10; +c8cyx:^f
[(hB%x_"
/* M-K.[}}-d
* (non-Javadoc) `u./2]n
* SGZ]_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r35'U#VMk?
*/ UL46%MFQ\
public void sort(int[] data) { qWQ7:*DL
int[] temp=new int[data.length]; yNVmTb9mF
mergeSort(data,temp,0,data.length-1); _cWz9 ;
} TAkM-iyH]
!<ae~#]3P
private void mergeSort(int[] data, int[] temp, int l, int r) { M~6x&|2
int i, j, k; kpe7\nd=>
int mid = (l + r) / 2; .g|D
if (l == r) !uC`7a
return; z%F68f73
if ((mid - l) >= THRESHOLD) RWN2P6
mergeSort(data, temp, l, mid); .^?^QH3
else <hYrcOt
insertSort(data, l, mid - l + 1); <])w@QOA#
if ((r - mid) > THRESHOLD) _li\b-
mergeSort(data, temp, mid + 1, r); ;[)t*yAh
else xnyp'O8yk
insertSort(data, mid + 1, r - mid); @IB+@RmL
p6VHa$[
for (i = l; i <= mid; i++) { \Oku<5
temp = data; $U uSrX&
} hhS]wM?B
for (j = 1; j <= r - mid; j++) { >=|;2*9v
temp[r - j + 1] = data[j + mid]; @Ju!|G9z/p
} v7"Hvp3w
int a = temp[l]; pB3dx#l
int b = temp[r]; ~)RKpRga\p
for (i = l, j = r, k = l; k <= r; k++) { Ly0U')D:
if (a < b) { x8]9Xe:_>O
data[k] = temp[i++]; *-!&5~o/U
a = temp; C ?^si
} else { HxC_nh
data[k] = temp[j--]; ^:b%QO
b = temp[j]; VTDp9s
} )/'y'd<r
} E&?z-,-o@
} QU&b5!;&
++s=$D
/** hBSci|*f
* @param data (IbT5
* @param l JsOu *9R
* @param i G(alM=q
*/ Z/z(P8#U\
private void insertSort(int[] data, int start, int len) { ,{@,dw`lUz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); </K"\EU
} |JpLMUG
} ^JDiI7
} 6 u3$ .Q
} DqLZc01>
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堆排序： T~nmEap
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package org.rut.util.algorithm.support; \78w1Rkl
UMg*Yv%
import org.rut.util.algorithm.SortUtil; zc<C %t[~y
[Z3B~c
/** >L#HE
* @author treeroot T)IH4UO
* @since 2006-2-2 *wml 4lh
* @version 1.0 R<}Yf[TQ
*/ @v1f)(N
public class HeapSort implements SortUtil.Sort{ r?e)2l~C8j
4v+4qyMyE
/* (non-Javadoc) `+~@VZ3m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OzFA>FK0f;
*/ t^h{D
public void sort(int[] data) { yNk9KK)
MaxHeap h=new MaxHeap(); PvzB, 2":
h.init(data); *o8DfZ
for(int i=0;i h.remove(); AiXxn'&i
System.arraycopy(h.queue,1,data,0,data.length); DrD68$,QN
} zOR
Pv.z~~lY
private static class MaxHeap{ l<7)uO^8
+jcg[|-'/
void init(int[] data){ d%$'Y|
this.queue=new int[data.length+1]; YuWsE4$
for(int i=0;i queue[++size]=data; [XA f=x
fixUp(size); +tz^ &(
} sjLI^#a
} /J8'mCuC.
\lVX~r4
private int size=0; VWoxi$3v
p]*BeiT#n%
private int[] queue; i%7b)t[y
UE4zmIq
public int get() { MtAD&+3$
return queue[1]; wL]7d3t
} vb{+yEa
oWVlHAPj
public void remove() { ]k[y#oB
SortUtil.swap(queue,1,size--); 2nOoG/6 E
fixDown(1); 3IqYpK(s
} Yt"&8N]
file://fixdown _DChNX
private void fixDown(int k) { 4C&L%A
int j; .S&S#}$/]
while ((j = k << 1) <= size) { 8$!/Zg
if (j < size %26amp;%26amp; queue[j] j++; QE7 r{
if (queue[k]>queue[j]) file://不用交换 ,4ftQJ
break; ;b:Ct<
SortUtil.swap(queue,j,k); 8H_3.MK
k = j; XfFZ;ul
} ]p~QdUR(
} CUOxx,V
private void fixUp(int k) { .$>?2|gRv
while (k > 1) { { U a19~'>
int j = k >> 1; 9V&%_.Z
if (queue[j]>queue[k]) $l:?(&u
break; P)~PrTa%
SortUtil.swap(queue,j,k); .}.5|z} A
k = j; 4 Yq|Z
} wU.K+4-k
} Zg%SE'kK
kStWsc$;+T
} k*\=IacX0
w/s{{X<bF
} j r6)K;:.
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SortUtil： [#H$@g|CT
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package org.rut.util.algorithm; @Nb&f<+gi
+<Ot@luE
import org.rut.util.algorithm.support.BubbleSort; 9I/o;Js
import org.rut.util.algorithm.support.HeapSort; }' `2C$
import org.rut.util.algorithm.support.ImprovedMergeSort; H@er"boi
import org.rut.util.algorithm.support.ImprovedQuickSort; ^I9x@t
import org.rut.util.algorithm.support.InsertSort; -nG3(n&wB
import org.rut.util.algorithm.support.MergeSort; 1tG,V%iCp
import org.rut.util.algorithm.support.QuickSort; u2'xM0nQ
import org.rut.util.algorithm.support.SelectionSort; pLL ^R
import org.rut.util.algorithm.support.ShellSort; ,%X~/V
r?d601(fa
/** ~DcX}VCm
* @author treeroot 0Ph,E
* @since 2006-2-2 LjjE(Yrv{
* @version 1.0 )` S,vF~
*/ z7F~;IB*u
public class SortUtil { .Vq-<c%
public final static int INSERT = 1; o9~Z! &p
public final static int BUBBLE = 2; +r9:n(VP
public final static int SELECTION = 3; rixNz@p'%
public final static int SHELL = 4; }NDw3{zn
public final static int QUICK = 5; v]gJ 7x
public final static int IMPROVED_QUICK = 6; M~;Ww-./
public final static int MERGE = 7; yef@V2Z+
public final static int IMPROVED_MERGE = 8; d$g-u8
public final static int HEAP = 9; ro7\}O:I
oT$w14b
public static void sort(int[] data) { ZVEq{x1Zc
sort(data, IMPROVED_QUICK); cEO g
} k2N[B(&4J
private static String[] name={ & :x_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -gH1`*YL
}; *nU7v3D
n_sCZ6uXEQ
private static Sort[] impl=new Sort[]{ /og2+!
new InsertSort(), 2@Jw?+}vr
new BubbleSort(), em<(wJ-Y
new SelectionSort(), SfQ,uD6
new ShellSort(), f$9V_j-K+
new QuickSort(), 8$-(%
new ImprovedQuickSort(), Rer\='
new MergeSort(), ZffK];D
new ImprovedMergeSort(), c&IIqT@Gb0
new HeapSort() j*<H18^G
}; cD Z]r@AQ
i1ur>4Ns
public static String toString(int algorithm){ 2Q,e1'=
return name[algorithm-1]; a_w#,^/P
} 2#ND(
([iMOE[D3
public static void sort(int[] data, int algorithm) { I0sd%'Ht?
impl[algorithm-1].sort(data); 0RN]_z$;H
} xRq|W4ay
4]u53`
public static interface Sort { Vq2d+ ,fb
public void sort(int[] data); DzYi> E:*
} q>X#Aaib
[>Z~&cm
public static void swap(int[] data, int i, int j) { _dVzvk`_R
int temp = data; _5EM<Ux
data = data[j]; ie{9zO<d
data[j] = temp; IQf:aX
} sL75C|f9
} oOUL<ihe?