[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; {xw*H<"f<
} S;$@?vF
int i1=l; 9.|+KIRb
int i2=mid+1; d"nz/$
for(int cur=l;cur<=r;cur++){ 47_4`rzy;
if(i1==mid+1) ?~rF3M.=|
data[cur]=temp[i2++]; 9l+`O0.@
else if(i2>r) QD LXfl/
data[cur]=temp[i1++]; d\`A ^
else if(temp[i1] data[cur]=temp[i1++]; 0lNVQxG
else &nk6_{6 c
data[cur]=temp[i2++]; B$k<F8!%
} 8<$6ufvOv
} &\][:kG;
\5^#5_<
} 9&}`.Py
5y! 4ny_
改进后的归并排序: d"+zDc;
/)SwQgK#
package org.rut.util.algorithm.support; b=a&!r5M
r)<]W@Pr
import org.rut.util.algorithm.SortUtil; DCb\=E
tRYMK+
/** >9W ;u`
* @author treeroot =:aH2T*
* @since 2006-2-2 eL9RrSXz
* @version 1.0 Q3#-q>;7
*/ lTPo2-j/eK
public class ImprovedMergeSort implements SortUtil.Sort { PY: l
"U34D1I)#
private static final int THRESHOLD = 10; i^(_Gk
;C%40;Q
/* wKhuUZj{
* (non-Javadoc) 4KE"r F
* SU"-%}~O#,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SN|EWe^
*/ (yE?)s
public void sort(int[] data) { XOO!jnQu
int[] temp=new int[data.length]; vm)&WEL!
mergeSort(data,temp,0,data.length-1); ?eT^gWX
} ]#N2:ych
9|T%q2O
private void mergeSort(int[] data, int[] temp, int l, int r) { nMD^x
int i, j, k; :W,6zv(..u
int mid = (l + r) / 2; q{ov62t`
if (l == r) {*H&NI
return; @L^2VVWk^
if ((mid - l) >= THRESHOLD) ^Sx0t
mergeSort(data, temp, l, mid); CU 2;m\Hc
else %'j)~
insertSort(data, l, mid - l + 1); 6\)61o_1|
if ((r - mid) > THRESHOLD) zF%CFqQ
mergeSort(data, temp, mid + 1, r); c&2ZjM
else /Dj6Bj }
insertSort(data, mid + 1, r - mid); /hf}f=7kH
@(PYeXdV6&
for (i = l; i <= mid; i++) { I,vy__sZ
temp = data; 7/NXb
} oK@!yYv
for (j = 1; j <= r - mid; j++) { AJSe +1
temp[r - j + 1] = data[j + mid]; Lm\N`
} .ps'{rl8
int a = temp[l]; au2ieZZ[
int b = temp[r]; ;A~S){
for (i = l, j = r, k = l; k <= r; k++) { T%K(opISc(
if (a < b) { XJsHy_6
data[k] = temp[i++]; i$)bZr\
a = temp; =,KRZqz
} else { L5""
data[k] = temp[j--]; Kxz<f>`b/
b = temp[j]; }% JLwN
} +T=Z!2L
} Z}.N4 /
} ,"
|$#u~<r_ w
/** Ol:&cX3G
* @param data KDgJ~T
* @param l F{ J>=TC
* @param i Wm4@+}
*/ -Ep cX!i
private void insertSort(int[] data, int start, int len) { aM?Xi6 U5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g5R2a7
} O5{!CT$
} p*F&G=ZE
} vmL%%7
} "T@9]>6.f
Jt"0|+g|
堆排序： !>-cMI6E
M~w =ZJ@
package org.rut.util.algorithm.support; %TxFdF{A
2hAu~#X
import org.rut.util.algorithm.SortUtil; `h_,I R<
>>=lh
/** }N(-e$88
* @author treeroot UA/Q3)
* @since 2006-2-2 V0z.w:-
* @version 1.0 G>&=rmK"
*/ Y8`4K*58%
public class HeapSort implements SortUtil.Sort{ k_#ra7zP
|{+D65R
/* (non-Javadoc) jDIO,XuF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $'dJ+@
*/ :\L{S
public void sort(int[] data) { Oga0CR_
MaxHeap h=new MaxHeap(); \v{tK;
h.init(data); KOGbC`TN<
for(int i=0;i h.remove(); /J`8Gk59
System.arraycopy(h.queue,1,data,0,data.length); 5#s?rA%u
} [sp=nG7i&
Rv ?Go2
private static class MaxHeap{ 2Ch!LS:+
g !w7Yv
void init(int[] data){ X|t?{.p
this.queue=new int[data.length+1]; h<\o[n7j
for(int i=0;i queue[++size]=data; 7g_:Gv~v
fixUp(size); ?JDZDPVJ)
} {o< 4 ^
} aM5zYj`pW
+[8s9{1{C
private int size=0; mb~w .~%
vC[)/w
private int[] queue; #sdW3m_%
FiJJe
public int get() { _,_>B8
return queue[1]; o0&jel1a
} "2(lgxhj
ym:^Y-^iV
public void remove() { ?dlQE,hB$
SortUtil.swap(queue,1,size--); y562g`"U
fixDown(1); Bx0^?>
} qyGVyi3
file://fixdown Kf2*|ZHj
private void fixDown(int k) { dQ@e+u5
int j; ~ z*
while ((j = k << 1) <= size) { >3s9vdUp4h
if (j < size %26amp;%26amp; queue[j] j++; *5]fjh{
if (queue[k]>queue[j]) file://不用交换 1u75
break; ZN-J!e"`
SortUtil.swap(queue,j,k); +"6_rbeuO
k = j; V;mKJ.d${
} ;({&C34a
} D{I^_~-\5
private void fixUp(int k) { lidzs<W-fW
while (k > 1) { K2>(C$Z
int j = k >> 1; 1BwCJ7?8
if (queue[j]>queue[k]) z"bgtlfb8
break; iq-n(Rfw~
SortUtil.swap(queue,j,k); 2-j+-B|i
k = j; , fFB.q"
} hc2[,Hju{O
} %YG ~ql
GJai!$v
} )(TaVHJR
,n TC7V
} 'm}K$h(U
db`xlvrCY
SortUtil： BRYhL|d~.
5_ -YF~
package org.rut.util.algorithm; {\jh?P|
-q|K\>tgU
import org.rut.util.algorithm.support.BubbleSort; Fx2 KRxk
import org.rut.util.algorithm.support.HeapSort; BusD}9QqB
import org.rut.util.algorithm.support.ImprovedMergeSort; =HmV0
import org.rut.util.algorithm.support.ImprovedQuickSort; :,%~rR
import org.rut.util.algorithm.support.InsertSort; 7kx)/Rw\B
import org.rut.util.algorithm.support.MergeSort; csz/[*
import org.rut.util.algorithm.support.QuickSort; HGfV2FtTz
import org.rut.util.algorithm.support.SelectionSort; 0RAmwfXm
import org.rut.util.algorithm.support.ShellSort; ]]`hnzJX
]?S\So+
/** &H$ 3`"p5u
* @author treeroot c-3AzB#[
* @since 2006-2-2 )a.Y$![
* @version 1.0 m619bzFlB
*/ y[Zl,v7
public class SortUtil { S-WD?BFC
public final static int INSERT = 1; 7SLJLn3d
public final static int BUBBLE = 2; Ac'[(
public final static int SELECTION = 3; I8@NQ=UV0
public final static int SHELL = 4; &1YqPk
public final static int QUICK = 5; *Uie{^p?
public final static int IMPROVED_QUICK = 6; <:0649ZB
public final static int MERGE = 7; U:m[* }+<
public final static int IMPROVED_MERGE = 8; r-v;A
public final static int HEAP = 9; wV-1B\m
0? (
public static void sort(int[] data) { WM5s
sort(data, IMPROVED_QUICK); Wk"4mq
} V|KYkEl r1
private static String[] name={ '; ,DgR;'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JO\Tf."a\
}; n3t1'_/TU}
[H)NkR;I
private static Sort[] impl=new Sort[]{ v]\io#
new InsertSort(), eyf\j,xP&
new BubbleSort(), 0ohpJh61Q
new SelectionSort(), jnsV'@v8Nj
new ShellSort(), S.rlF1`
new QuickSort(), MKLntX
new ImprovedQuickSort(), $,4;_4t
new MergeSort(), E</UmM+ R
new ImprovedMergeSort(), exrsYo!%
new HeapSort() \.y|=Ql_u
}; IJ2]2FI
{%5k1,/(
public static String toString(int algorithm){ jm0J)Z_"nr
return name[algorithm-1]; F%@( $f
} RX8$&z
.ii9-+_
public static void sort(int[] data, int algorithm) { l_GvdD
impl[algorithm-1].sort(data); dOh'9kk3
} ]C_g:|q
#7I,.DUy[
public static interface Sort { 7yo/sb9h
public void sort(int[] data); X5UcemO
} l:mC'aR
PhW<)B]
public static void swap(int[] data, int i, int j) { L9nv05B
int temp = data; ["|AD,$%
data = data[j]; Nq6~6Rr
data[j] = temp; A]"$O&l
} l{F^"_U
} WV}<6r$e