[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; |4UU`J9M
} <@BzF0
int i1=l; "[`.I*WNo
int i2=mid+1; K!X>k
for(int cur=l;cur<=r;cur++){ s m42
if(i1==mid+1) #q;hX;Va
data[cur]=temp[i2++]; e ~X<+3<
else if(i2>r) 5^Gv!XW
data[cur]=temp[i1++]; OH.Re6Rr
else if(temp[i1] data[cur]=temp[i1++]; .U8Se+;
else zeqP:goy
data[cur]=temp[i2++]; IrJPP2Q
} pUvbIbg+
} :<-,[(@bR
CYr2~0<g
} G1;.\i
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改进后的归并排序: +]n.uA-`[a
s\c*ibxM,
package org.rut.util.algorithm.support; < q6z$c)K
b>N)H
import org.rut.util.algorithm.SortUtil; o8!gV/oy
QN%w\JXS
/** ?/mkFDN
* @author treeroot *. H1m{V
* @since 2006-2-2 xS~OAcxg
* @version 1.0 O1/U3/2/d
*/ DVu_KT[Hd
public class ImprovedMergeSort implements SortUtil.Sort { +O<0q"E
!B=Oc!e=K
private static final int THRESHOLD = 10; VS$ZR'OP0
O|#N$a&_N
/* t@GPB]3[
* (non-Javadoc) 9m2_zfO[w
* 8\-Q(9q(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n@LR?
*/ K^V*JH\G
public void sort(int[] data) { {HV$hU+_)Q
int[] temp=new int[data.length]; *>Z|!{bI
mergeSort(data,temp,0,data.length-1); :n3)vK
} 8S&Kf>D
-Yaw>$nJ
private void mergeSort(int[] data, int[] temp, int l, int r) { x+V;UD=mH
int i, j, k; a:C'N4K
int mid = (l + r) / 2; _":yUa0D
if (l == r) 'qTMY*
return; )PC(1Zn
if ((mid - l) >= THRESHOLD) u-W6 hZ$
mergeSort(data, temp, l, mid); :Zy7h7P,lT
else -+1it
insertSort(data, l, mid - l + 1); ^*7~ Wxk5
if ((r - mid) > THRESHOLD) Nw'3gJ:
mergeSort(data, temp, mid + 1, r); j@0/\:1(U
else \`w!v,aM$
insertSort(data, mid + 1, r - mid); X-oHQu5
Q AJX7
for (i = l; i <= mid; i++) { B;M{v5s~]
temp = data; 39;Z+s";
} =*q|568
for (j = 1; j <= r - mid; j++) { lVywc:X
temp[r - j + 1] = data[j + mid]; 4\HB rd#P
} I0 y+,~\
int a = temp[l]; =<-tD<
int b = temp[r]; 55vpnRM
for (i = l, j = r, k = l; k <= r; k++) { '1)BZ!
if (a < b) { @`:n+r5u
data[k] = temp[i++]; >3H/~ Y
a = temp; myTz
} else { Lc>9[!+#
data[k] = temp[j--]; VjU;[
b = temp[j]; 5YJn<XEc
} J@ x%TA
} _C9*M6IU
} KlgPDV9mg
$or?7 w>
/** QN[-XQ>Xt
* @param data )hH9VGZq(
* @param l GyV3]Qqj
* @param i !F0MLvdX7^
*/ wj>mk
private void insertSort(int[] data, int start, int len) { tt=?*n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H'myd=*h~8
} GS|sx
} T`g.K6$b
} r3o_mO?X
} L&1VPli
(~/VP3.S
堆排序： NiU}A$U
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package org.rut.util.algorithm.support; !1f8~"Z
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import org.rut.util.algorithm.SortUtil; X{rw+!
q!#e2Dx
/** vjG: 1|*e
* @author treeroot Hz$l)g}U
* @since 2006-2-2 \14"Bgj1
* @version 1.0 4[za|t
*/ ;dl>
public class HeapSort implements SortUtil.Sort{ r}OK3J
3Oy-\09
/* (non-Javadoc) 8tWOVLquJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yp=Hxf
*/ LTu cs}
public void sort(int[] data) { 03*` T
MaxHeap h=new MaxHeap(); >_QC_UX>4i
h.init(data); qu[ ~#
for(int i=0;i h.remove(); Gx?p,Fj
System.arraycopy(h.queue,1,data,0,data.length); q/xMM`{
} D%v4B`4ua'
!dB {E
private static class MaxHeap{ :8}QKp
*Dld?Q
void init(int[] data){ f[3DKA
this.queue=new int[data.length+1]; ;aBK4<-vl
for(int i=0;i queue[++size]=data; -SaH_Nuj
fixUp(size); =whZ?,u1
} 0uzm@'^
} 4C^;lK
P"0S94o:5J
private int size=0; V,bfD3S3
'~i}2e.
private int[] queue; wZVY h
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public int get() { HlqvXt\
return queue[1]; <va3Ly)c&
} I0 a,mO;m
v8"plx=3
public void remove() { \P]w^
SortUtil.swap(queue,1,size--); >ir'v5
fixDown(1); M:|Z3p K
} H8~<;6W
file://fixdown X l#P@60
private void fixDown(int k) { TEl:;4
int j; >TUs~
while ((j = k << 1) <= size) { c6sGjZdR
if (j < size %26amp;%26amp; queue[j] j++; `_sc_Y|C!
if (queue[k]>queue[j]) file://不用交换 pN/)$6=
break; M}NmA
SortUtil.swap(queue,j,k); &~U!X~PpB
k = j; T^u][I3*
} W R@=[G#TJ
} h5WS<P
private void fixUp(int k) { {]plT~{e
while (k > 1) { b:/;
int j = k >> 1; N+x0"~T}I
if (queue[j]>queue[k]) AOQimjW9a
break; /W'GX n
SortUtil.swap(queue,j,k); \o9-[V#Gm
k = j; hK"hMyH^
} Ei2Y)_
} 9;s:Bo
v5l)T}Nb
} ^'i(@{{o\
`;b@a<Wl
} {4Y@DQ-
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SortUtil： Tx?,]c,(u
2#l<L>#
package org.rut.util.algorithm; ep .AW'+
<b>@'\w9
import org.rut.util.algorithm.support.BubbleSort; . $uvQpyh
import org.rut.util.algorithm.support.HeapSort; 6lO]V=+
import org.rut.util.algorithm.support.ImprovedMergeSort; <jF]SN
import org.rut.util.algorithm.support.ImprovedQuickSort; cc7*O
import org.rut.util.algorithm.support.InsertSort; ^D\1F$AjC
import org.rut.util.algorithm.support.MergeSort; xc[@lr
import org.rut.util.algorithm.support.QuickSort; YLVV9(
import org.rut.util.algorithm.support.SelectionSort; 9tsI1]1[m
import org.rut.util.algorithm.support.ShellSort; fv_}7t7
zQ9"i
/** $j:$ `
* @author treeroot $u_0"sUV
* @since 2006-2-2 !Uz{dFJf;
* @version 1.0 3}=r.\]U
*/ :S}!i?n
public class SortUtil { 0F-X.Dq
public final static int INSERT = 1; 1C\OL!@L
public final static int BUBBLE = 2; D_ xPa
public final static int SELECTION = 3; !TY9\8JzV
public final static int SHELL = 4; \UM9cAX`
public final static int QUICK = 5; t m?[0@<s
public final static int IMPROVED_QUICK = 6; n"8vlNeW
public final static int MERGE = 7; IY6DZP
public final static int IMPROVED_MERGE = 8; 24PEt%2
public final static int HEAP = 9; ,80qwN,
\"B?'Ep;
public static void sort(int[] data) { 7l> |G,[c
sort(data, IMPROVED_QUICK); D].!u{##
} T:q_1W?h]
private static String[] name={ ~4h<nc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6s\niro2
}; S[!K
\$YKw0K
private static Sort[] impl=new Sort[]{ 6M9t<DQV
new InsertSort(), k\$))<3
new BubbleSort(), ,dn9tY3
new SelectionSort(), Vy0s%k
new ShellSort(), O,R5csMh
new QuickSort(), GZ0? C2\
new ImprovedQuickSort(), 5ckL=q"+/
new MergeSort(), p3ox%4
new ImprovedMergeSort(), ~>&7~N8
new HeapSort() =r"8J5[f
}; @5N^^B
[2?|BUtD[
public static String toString(int algorithm){ XlUM~(7+v
return name[algorithm-1]; [ qt hn[3
} O=UXe]D
ehk5U,d
public static void sort(int[] data, int algorithm) { vN:gu\^-
impl[algorithm-1].sort(data); hc OT+L>
} L;zwqdI
k8H@0p
public static interface Sort { {Vw+~8
public void sort(int[] data); CsHHJgx
} r_nB-\
Qb<i,`SN
public static void swap(int[] data, int i, int j) { Qd;P?W6
int temp = data; a5=8zO#%g
data = data[j]; W_l/Jpv!W
data[j] = temp; wBZ=IMDu\
} Fb=(FQ2Y?
} k#Qav1_