[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; V_RTI.3p
} Z!@~>i
int i1=l; T:Hr&ws4
int i2=mid+1; OK6]e3UO
for(int cur=l;cur<=r;cur++){ %Nhx;{
if(i1==mid+1) feNdMR7eM
data[cur]=temp[i2++]; ##;Er47@^
else if(i2>r) NufLzg{
data[cur]=temp[i1++]; "@d[h,TM
else if(temp[i1] data[cur]=temp[i1++]; ]2'na?q9
else #iWSDy
data[cur]=temp[i2++]; =fve/_Q~
} ZF|+W?0&%
} C] 9p5Hs
tqeZ#w7
} < hO /jB
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改进后的归并排序: 5ish\"
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package org.rut.util.algorithm.support; 1_ C]*p
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import org.rut.util.algorithm.SortUtil; dBe`p5Z
r'uGWW"w
/** c`WHNky%j
* @author treeroot 8&~~j7p,
* @since 2006-2-2 X 9%'|(tL
* @version 1.0 $m+sNEAa
*/ P=&o%K,:f
public class ImprovedMergeSort implements SortUtil.Sort { On@<J&%
\&3"<6xA
private static final int THRESHOLD = 10; &q~:~
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/* C2xL1`
* (non-Javadoc) @qjfZH@
* ]%Nlv(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b0A1hb[|
*/ Qb; d:@9
public void sort(int[] data) { *^wB!{.#
int[] temp=new int[data.length]; f{i8w!O"~
mergeSort(data,temp,0,data.length-1); rs*Fy@
} u4neXYSy
<ggtjw S
private void mergeSort(int[] data, int[] temp, int l, int r) { 4)4+M
int i, j, k; ^/=#UQ*k
int mid = (l + r) / 2; nG,U>)
if (l == r) [NIlbjYH
return; iQ6epg1wB
if ((mid - l) >= THRESHOLD) ;k86"W
mergeSort(data, temp, l, mid); #nO|A\N
else CWG6;NT6m
insertSort(data, l, mid - l + 1); X_G| hx
if ((r - mid) > THRESHOLD) X!},8}~J~
mergeSort(data, temp, mid + 1, r); uV hCxUMQ
else eo!zW
insertSort(data, mid + 1, r - mid); :@xm-.D
j0GMTri3
for (i = l; i <= mid; i++) { {(#%N5%
temp = data; /?6|&
} a=$t&7;,
for (j = 1; j <= r - mid; j++) { /.eeOk
temp[r - j + 1] = data[j + mid]; J.+BD\pa
} 5P hX"7
int a = temp[l]; BH@)QVs-
int b = temp[r]; @[?!s%*2
for (i = l, j = r, k = l; k <= r; k++) { o}'bv
if (a < b) { [;oCYb$9
data[k] = temp[i++]; yag}fQ(XH
a = temp; q*AQq=
} else { #Hh^3N
data[k] = temp[j--]; W*:,m8wk
b = temp[j]; {8EW)4Hf
} -g/hAxb5
} m&oi8 P-6
} $7Mtt.d6
+~U=C9[gj
/** QIn/,Yd
* @param data /<3<. ~
* @param l XfzVcap
* @param i qy!Ou3^
*/ -(JUd4#
private void insertSort(int[] data, int start, int len) { [rOaM$3|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kF V7l
} Zx?b<"k
} Qc{RaMwD
} |__=d+M'
} )I@L+
V5GkP1L
堆排序： /WnE:3G
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package org.rut.util.algorithm.support; i(wgB\9i4
gCVryB@z2
import org.rut.util.algorithm.SortUtil; YY4-bNj[p
6a>H|"PNE
/** N\1/JW+
* @author treeroot "]-],K
* @since 2006-2-2 gKb0)4 AK
* @version 1.0 #G,XDW2"w
*/ [ij,RE7,T
public class HeapSort implements SortUtil.Sort{ @#b0T:+v'
_NdLcpBT?
/* (non-Javadoc) _b4fS'[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +ydm,aKk
*/ NyI;v=
public void sort(int[] data) { '3kcD7
MaxHeap h=new MaxHeap(); \w)?SVp
h.init(data); WY)^1Gb$ux
for(int i=0;i h.remove(); H=zN[MU
System.arraycopy(h.queue,1,data,0,data.length); ,R-Y~+!
} Wc#:f8dr
H]qq ~bO[
private static class MaxHeap{ iTNqWU-o
>4![&&
void init(int[] data){ hD 46@
this.queue=new int[data.length+1]; n2;9geq+
for(int i=0;i queue[++size]=data; j=.g:&r)
fixUp(size); 5&4F,v[zp
} TIRHT`"i
} ^[M~K5Y
8g5V,3_6
private int size=0; 9|K*G~J
`5"/dC
private int[] queue; T=? bdIl
JY4_v>Aob
public int get() { ] EyeBF)$
return queue[1]; uU+s!C9r
} owMuT^x?
@]3*B%t
public void remove() { BpXEK.Xw
SortUtil.swap(queue,1,size--); Nz]aaoO4
fixDown(1); c57bf
} `03<0L
file://fixdown tq E>Zx=X
private void fixDown(int k) { )b9I@)C
int j; Rc7.M"wzjX
while ((j = k << 1) <= size) { f sX;Nj]
if (j < size %26amp;%26amp; queue[j] j++; ]]V^:"ne
if (queue[k]>queue[j]) file://不用交换 $wXih#7
break; \2eFpy(
SortUtil.swap(queue,j,k); 7jZrU|:yu(
k = j; cJ4S!
} uf0^E3H
} Fr/QW7B5
private void fixUp(int k) { s@M
while (k > 1) { .%hQJ{vf-^
int j = k >> 1; @5*xw1B
if (queue[j]>queue[k]) Hrv),Ce
break; 3z$\&& BR
SortUtil.swap(queue,j,k); }moz9a
k = j; <\xQ7|e
} (jneEo=vr
} ?',}?{"c
r2)pAiTM*
} B#H2RTc
pgfu+K7?w
} =tP$re";o
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SortUtil： 9w$7VW;
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package org.rut.util.algorithm; K/A ? ]y
VG#$fRrZ
import org.rut.util.algorithm.support.BubbleSort; |<2JQ[]
import org.rut.util.algorithm.support.HeapSort; HO G=c!b
import org.rut.util.algorithm.support.ImprovedMergeSort; A9.;>8!u
import org.rut.util.algorithm.support.ImprovedQuickSort; |7Yvq%E
import org.rut.util.algorithm.support.InsertSort; i!ds{`d
import org.rut.util.algorithm.support.MergeSort; 7@\GU].2
import org.rut.util.algorithm.support.QuickSort; y#GCtkhi
import org.rut.util.algorithm.support.SelectionSort; dR%q1Y&`
import org.rut.util.algorithm.support.ShellSort; s=}~Q&8
K-ju,4A
/** Ny[s+2?
* @author treeroot >pJ6{Ip
* @since 2006-2-2 012:BZR
* @version 1.0 !4!S{#<q
*/ iu+zw[f
public class SortUtil { ~|J*E38
public final static int INSERT = 1; .w=:+msL{(
public final static int BUBBLE = 2; P|yGx)'^P
public final static int SELECTION = 3; Ed8U;U b
public final static int SHELL = 4; FK?mS>G6
public final static int QUICK = 5; ~m3V]v(q7
public final static int IMPROVED_QUICK = 6; ``/y=k/au
public final static int MERGE = 7; o7hH9iY
public final static int IMPROVED_MERGE = 8; 6Eij>{v
public final static int HEAP = 9; ,OFq'}q
20S9/9ll
public static void sort(int[] data) { #.RG1-L
sort(data, IMPROVED_QUICK); Kn3YI9
} R'jUS7]Y
private static String[] name={ Qj{$dqmDN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (0Zrfu^
}; U`HXsq p}
]wJ}-#Kx
private static Sort[] impl=new Sort[]{ &T5fH!?4
new InsertSort(), v[p/c.p?i
new BubbleSort(), _m)gO/02A
new SelectionSort(), iDyMWlV
new ShellSort(), I 0x`H)DA
new QuickSort(), f]{1ZU%4
new ImprovedQuickSort(), `ja`#%^\u
new MergeSort(), Qq@_Z=mt
new ImprovedMergeSort(), Ew)n~!s
new HeapSort() 5e~ j
}; Ncs4<"{$
.rD#1)O
public static String toString(int algorithm){ 8ItCfbqa6
return name[algorithm-1]; .YnP%X=
} $cp16
FB?q/_
public static void sort(int[] data, int algorithm) { [esX{6,i
impl[algorithm-1].sort(data); (25^r
} gdkLPZ<<
~_/<PIm
public static interface Sort { {+9^PC_hm;
public void sort(int[] data); ~jgN_jz
} 9Y!0>&o
Wme1Uid
public static void swap(int[] data, int i, int j) { w[J (E
int temp = data; M+;!]tbc3
data = data[j]; 4jq`No_
data[j] = temp; 0k.#
} tDuUAI54
} TA-(_jm