[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; c.e2M/
} ~ (jKz}'~U
int i1=l; n~V ]Z
int i2=mid+1; b"{'T]"*j
for(int cur=l;cur<=r;cur++){ ;N?]eM}yf
if(i1==mid+1) +csi[c)3E
data[cur]=temp[i2++]; ilqy/fL#
else if(i2>r) 1waTTT?"Ho
data[cur]=temp[i1++]; q1KZ5G)6GJ
else if(temp[i1] data[cur]=temp[i1++]; s|y "WDyx5
else :Nz2z[W$
data[cur]=temp[i2++]; q}?4f*WC
} ]%u@TK7
} /PSd9N*=y
^0\
} AiO$<CS
pz.JWCU1
改进后的归并排序: :BV6y|J9O^
dx@-/^.
package org.rut.util.algorithm.support; .0`m\~L
|}di&y@-JI
import org.rut.util.algorithm.SortUtil; @X;!92i
4J/}]Dr5
/** Tq[kl'_
* @author treeroot IHv[v*4:
* @since 2006-2-2 '|8} z4/g
* @version 1.0 %2{%Obp'
*/ +Z!)^j
public class ImprovedMergeSort implements SortUtil.Sort { LQRQA[^
M:[ %[+6
private static final int THRESHOLD = 10; Ay0U=#XP
4i(JZN?
/* NUWDc]@J*
* (non-Javadoc) st:`y=F_
* %1xb,g KO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vg>dI&O
*/ n%.7h3
public void sort(int[] data) { 8y.wSu
int[] temp=new int[data.length]; 8"8t-E#?
mergeSort(data,temp,0,data.length-1); \kMefU
} f$Fhf?'
SBfT20z[
private void mergeSort(int[] data, int[] temp, int l, int r) { 'mFqEn
int i, j, k; nG'&ZjA
int mid = (l + r) / 2; Y4`}y-'d
if (l == r) lvBx\e;7P
return; "8x8UgG
if ((mid - l) >= THRESHOLD) 2db3I:;E
mergeSort(data, temp, l, mid); JP!~,mdS
else q$Zh@
insertSort(data, l, mid - l + 1); }J:U=HJ
if ((r - mid) > THRESHOLD) 7e|s wJ>4
mergeSort(data, temp, mid + 1, r); .*Ct bGw
else -$cmG4
insertSort(data, mid + 1, r - mid); W14 J],{L
7byK{{/z
for (i = l; i <= mid; i++) { Bn#?zI
temp = data; 8pIP
} ?mFv0_!O
for (j = 1; j <= r - mid; j++) { =hC,@R>;
temp[r - j + 1] = data[j + mid]; IEsEdw]aZE
} H8Bs<2
int a = temp[l]; N`5,\TR2f
int b = temp[r]; ]6(N@RC
for (i = l, j = r, k = l; k <= r; k++) { k;AD`7(=
if (a < b) { ;g5m0l5
data[k] = temp[i++]; {JZZZY!n2
a = temp; QwJVS(Gs4
} else { cl[BF'.H
data[k] = temp[j--]; &:9cAIe]H
b = temp[j]; B}Z63|/N
} V@e?#iz
} =9O^p@Q#W
} I7|Pi[e
LtWP0@JA
/** ([\
* @param data ZRh~`yy
* @param l =9'RM>
* @param i M -cTRd-i
*/ Neq+16*u
private void insertSort(int[] data, int start, int len) { y~AVei&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c}Ft^Il
} a oD`=I*<
} A!s`[2 Z
} \r;#g{ _
} xu/cq9
u)X=Qm)
堆排序： 'y;EhOwj,
BZ94NOOdw
package org.rut.util.algorithm.support; 4IB9,?p
8;b(0^
import org.rut.util.algorithm.SortUtil; [YRz*5
nrL9 E'F'
/** Y_;#UU689
* @author treeroot <r.)hT"0
* @since 2006-2-2 6]V4muz#c
* @version 1.0 @TLS<~
*/ a]JYDq`,3
public class HeapSort implements SortUtil.Sort{ W]"zctE
J`peX0Stl
/* (non-Javadoc) A>vBQN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f/ ?_
*/ /7aBDc-v
public void sort(int[] data) { b*;Si7-
MaxHeap h=new MaxHeap(); nHnK)9\N
h.init(data); Pu7_ v
for(int i=0;i h.remove(); yCd-9zb=
System.arraycopy(h.queue,1,data,0,data.length); 1t:Q_j0Ym
} **w!CaqvY
H7z,j}l
private static class MaxHeap{ 9v;Vv0k_
_7Rr=_1}
void init(int[] data){ <6EeD5{*
this.queue=new int[data.length+1]; F|d\k Q
for(int i=0;i queue[++size]=data; eV2W{vuI
fixUp(size); nGpXI\K
} ^ssK
} _D+}q_
<Y*+|T+&d
private int size=0; _BM" ]t*
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private int[] queue; w,.+IV$Kk
J ][T"K
public int get() { S'|,oUWDb
return queue[1]; !S^AgZ~
} 3*]eigi)
p31NIf`
public void remove() { j5K]CTz#
SortUtil.swap(queue,1,size--); S/}2;\Xm
fixDown(1); Lrta/SU*
} Vu)4dD!
file://fixdown E[2m&3&
private void fixDown(int k) { NE"@Bk cm
int j; TlXI|3Ip
while ((j = k << 1) <= size) { `e(c^z#
if (j < size %26amp;%26amp; queue[j] j++; C\3y {s
if (queue[k]>queue[j]) file://不用交换 /,89p&h
break; %@wJ`F2a_
SortUtil.swap(queue,j,k); )2pbpbWX>
k = j; *?Lv3}E
} CpA|4'#
} W}--p fG
private void fixUp(int k) { |2?'9<
while (k > 1) { w QgoN%
int j = k >> 1; V `b2TS
if (queue[j]>queue[k]) zAK+8{,
break; ^$%S &W
SortUtil.swap(queue,j,k); 8B7cBkl:
k = j; D!Q">6_"z
} TkE 8D n
} V_C-P[2~
vqnw#U4`
} {G|,\O1
n1qQ+(xC
} (hTCK8HK
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SortUtil： >NqYyW,%
__`*dL>*
package org.rut.util.algorithm; x9$` W
r>dwDBE
import org.rut.util.algorithm.support.BubbleSort; IYqBQnX}oM
import org.rut.util.algorithm.support.HeapSort; B||*.`3gN
import org.rut.util.algorithm.support.ImprovedMergeSort; Scp7X7{N
import org.rut.util.algorithm.support.ImprovedQuickSort; /d0K7F
import org.rut.util.algorithm.support.InsertSort; j;%-fvd;
import org.rut.util.algorithm.support.MergeSort; 4,..kSA3iw
import org.rut.util.algorithm.support.QuickSort; kUq=5Y `D
import org.rut.util.algorithm.support.SelectionSort; F|F]970
import org.rut.util.algorithm.support.ShellSort; QBtnx[
rW0kA1=E
/** x N=i]~
* @author treeroot [r3!\HI7x
* @since 2006-2-2 xgABpikC^
* @version 1.0 _6O\W%it
*/ 6^%UU o%
public class SortUtil { IKABBW
public final static int INSERT = 1; wDcj,:h`
public final static int BUBBLE = 2; W [Of|?
public final static int SELECTION = 3; 7]^M>#
public final static int SHELL = 4; VK}fsOnj0
public final static int QUICK = 5; aF)1Nm[
public final static int IMPROVED_QUICK = 6; r9X?PA0f
public final static int MERGE = 7; \x)n>{3C
public final static int IMPROVED_MERGE = 8; 4?0vso*X<:
public final static int HEAP = 9; U2{ dN>
HuB<k3#sPy
public static void sort(int[] data) { OH;b"]
sort(data, IMPROVED_QUICK); ipQLK{]t
} W"):-Wq
private static String[] name={ X'%E\/~u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T^:UBjK6t{
}; k9)jjR*XxG
%TX@I$Ba
private static Sort[] impl=new Sort[]{ 'pm2n0
new InsertSort(), &F\?
new BubbleSort(), e"/;7:J5\
new SelectionSort(), #~SP)Ukp
new ShellSort(), dA@'b5N{"
new QuickSort(), S?RN?1
new ImprovedQuickSort(), ~vs}.kb
new MergeSort(), OC1I&",Ai|
new ImprovedMergeSort(), $"0MU
new HeapSort() HHiT]S9
}; Nndddk`
~GTz:nC*
public static String toString(int algorithm){ x;-. ZVF
return name[algorithm-1]; f~Fm4>\(
} hy}8Aji&
$wmvKQc{lx
public static void sort(int[] data, int algorithm) { CF+_/s#j^
impl[algorithm-1].sort(data); u`y><w4i
} D_/^+H]1
NLS%Sq
public static interface Sort { #?q&r_@@
public void sort(int[] data); ^\\Tx*#i
} 1&^MfP}
JAAI_gSR3
public static void swap(int[] data, int i, int j) { !O-C,uSm
int temp = data; D<8HZ%o
data = data[j]; &C_'p{G
data[j] = temp; A]YVs
} 4!+pc-}-
} <,3^|$c%