[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; ngF5ywIG
} _~!*|<A_
int i1=l; l%"[857
int i2=mid+1; Z#7T!/28
for(int cur=l;cur<=r;cur++){ s/[15
if(i1==mid+1) XVwaX2=L
data[cur]=temp[i2++]; 9F+i+(\,b
else if(i2>r) ]~S,K}T
data[cur]=temp[i1++]; R^zTgyr
else if(temp[i1] data[cur]=temp[i1++]; 5Pmmt&#/Z
else VB6EM|bphl
data[cur]=temp[i2++]; *p!K9$4
} v%RcwVt|
} q~*3Bk~
tln*Baq
} 9L3#aE]C
ZUGuV@&-T
改进后的归并排序: jR~2mf!h*e
gM=oH
package org.rut.util.algorithm.support; >XzCHtEP
Ao%E]M
import org.rut.util.algorithm.SortUtil; cgKK(-$ny
x17cMfCH%
/** #PYTFB%
* @author treeroot m~s.al(G91
* @since 2006-2-2 \ZdV|23
* @version 1.0 kIS&! V
*/ ".+wz1
public class ImprovedMergeSort implements SortUtil.Sort { vUa~PN+Iy
y- S]\tu
private static final int THRESHOLD = 10; 1B~H*=t4h
3UeG>5R
/* uS :3Yo
* (non-Javadoc) `5}XmSJ?5
* =\s(v-8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x:8xGG9
*/ FG8genCH@
public void sort(int[] data) { #5HJW[9
int[] temp=new int[data.length]; @+A`n21,O
mergeSort(data,temp,0,data.length-1); ]9z{ 95
} d!) &@k
PN0l#[{EN
private void mergeSort(int[] data, int[] temp, int l, int r) { @DK,ka(
int i, j, k; \~ O6S`,
int mid = (l + r) / 2; s+?r4t3H!
if (l == r) & i|x2; v
return; p1t9s N,
if ((mid - l) >= THRESHOLD) s]Z/0:`
mergeSort(data, temp, l, mid); btb-MSkO
else >*%ySlZbs
insertSort(data, l, mid - l + 1); GIQ/gM?Pv
if ((r - mid) > THRESHOLD) (1\!6
mergeSort(data, temp, mid + 1, r); mMO:m8W
else K V^`
insertSort(data, mid + 1, r - mid); w#_xV =
?bbu^;2*f
for (i = l; i <= mid; i++) { 6 )eO%M`
temp = data; (PU0\bGA
} (_-<3)q4
for (j = 1; j <= r - mid; j++) { !pl<
temp[r - j + 1] = data[j + mid]; R7cY$K{j
} 1vQf=t%lw
int a = temp[l]; !$hrK6o
int b = temp[r]; Sj{z
for (i = l, j = r, k = l; k <= r; k++) { M5 ep\^
if (a < b) { hfP}+on%
data[k] = temp[i++]; m *8[I
a = temp; AR'q2/cw
} else { mJ0nyjX^
data[k] = temp[j--]; f5zxy!dhKS
b = temp[j]; %*]3j^b Q+
} fKIwdk%!-
} X4*{CM
} [(}f3W&
-tZ2 N
/** qJB9z0a<Ov
* @param data <QTu"i
* @param l Jis{k$4
* @param i ZN5\lon|Y
*/ i{PRjkR
private void insertSort(int[] data, int start, int len) { /78gXHv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); orf21N+[
} =K{$?%"
} LlL\7?_;
} b")&"o)G2W
} h>$,97EU
Qpiv,n
堆排序： %yJL-6U
QsI#Ae,O#;
package org.rut.util.algorithm.support; j2deb`GD
//`heFuc]>
import org.rut.util.algorithm.SortUtil; g"( vl-Uw
No<2+E!
/** 8dq{.B?
* @author treeroot neJNMdv@T
* @since 2006-2-2 L7_Mg{
* @version 1.0 =1)yI>2e%}
*/ DSYtj}>
public class HeapSort implements SortUtil.Sort{ )<9g+^
i;*c|ma1>
/* (non-Javadoc) 8,=Ti7_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a)PBC{I
*/ Fp4eGuWH#
public void sort(int[] data) { Bo.x
MaxHeap h=new MaxHeap(); (\.[pj%-O
h.init(data); UF=5k~7<b
for(int i=0;i h.remove(); !V$nU8p|
System.arraycopy(h.queue,1,data,0,data.length); ^i&/k
} R}Uvi9?
~ygiKsD6b
private static class MaxHeap{ 7xB#)o53
;gy_Qf2U
void init(int[] data){ )FT~gl%
this.queue=new int[data.length+1]; ch1EF/"
for(int i=0;i queue[++size]=data; NS-u,5Jt
fixUp(size); ?*K;+@EH
} *:\-:*
} @jN!j*Y H
=r3Yt9
private int size=0; R+P,kD?
1Ls@|
private int[] queue; LTS3[=AB
c~ l$_A
public int get() { n7 4?W
return queue[1]; 3ypB~bNw
} hz<kR@k}
y1cAw
public void remove() { >*,Zc
SortUtil.swap(queue,1,size--); ruS/Yh
fixDown(1); x%k4Lm
} g~h`wv'
file://fixdown <d#9d.<
private void fixDown(int k) { kGc;j8>."
int j; G'MYTq
while ((j = k << 1) <= size) { Au#(guvm
if (j < size %26amp;%26amp; queue[j] j++; {Mp>+e@xx
if (queue[k]>queue[j]) file://不用交换 $n(?oyf
break; J;+tQ8,AP
SortUtil.swap(queue,j,k); !9356) cV
k = j; ?T7`E q
} FfI$3:9
} RQy|W}d_
private void fixUp(int k) { m0paGG
while (k > 1) { J^hj R%H
int j = k >> 1; 1{_tV^3@
if (queue[j]>queue[k]) <4^ _dJ9=
break; , =IbZ
SortUtil.swap(queue,j,k); ~d/Doi
k = j; _Z#yI/5r
} kMo;<Z
} W>wIcUP<<
%.pX!jL
} j1v fp"J1
?:s`}b
} [ k^6#TQcn
'-D-H}%;}M
SortUtil： oPk2ac
r,2x?Qi
package org.rut.util.algorithm; &1F)/$,v
-1Lh="US
import org.rut.util.algorithm.support.BubbleSort; HO41)m+&
import org.rut.util.algorithm.support.HeapSort; 3VCyq7B^
import org.rut.util.algorithm.support.ImprovedMergeSort; d5T0#ue/e
import org.rut.util.algorithm.support.ImprovedQuickSort; Fq&@dxN3
import org.rut.util.algorithm.support.InsertSort; 1MRt_*N4
import org.rut.util.algorithm.support.MergeSort; @0A0\2
import org.rut.util.algorithm.support.QuickSort; 3_J9SwtN
import org.rut.util.algorithm.support.SelectionSort; 7xVI,\qV
import org.rut.util.algorithm.support.ShellSort; 1mJBxg}(
qK:.j
/** TiCp2Rsz
* @author treeroot RA+Y./*h
* @since 2006-2-2 cwz %LKh
* @version 1.0 O2:m)@
*/ k>K23(X
public class SortUtil { Zu$f-_"
public final static int INSERT = 1; |C=^:@}ri?
public final static int BUBBLE = 2; |}QDC/
public final static int SELECTION = 3; .J%}ROm
public final static int SHELL = 4; e&8pTD3
public final static int QUICK = 5; }dAb}0XK.
public final static int IMPROVED_QUICK = 6; *VIM!/YW
public final static int MERGE = 7; QP7EPaW
public final static int IMPROVED_MERGE = 8; y`mEsj
public final static int HEAP = 9; "2'nLQ""q
+{]/ b%P
public static void sort(int[] data) { &%fy
sort(data, IMPROVED_QUICK); _Y|k \|'
} Nq9Qsia&
private static String[] name={ w{F8]N>0<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T_[W=9
}; _S,2j_R9
>P>.j+o/
private static Sort[] impl=new Sort[]{ <Sm=,Sw
new InsertSort(), fk*JoR.o
new BubbleSort(), ~b3xn T
new SelectionSort(), @K4} cP
new ShellSort(), lLmVat(
new QuickSort(), viD+~j18
new ImprovedQuickSort(), <H}"xp)j0
new MergeSort(), 9 ?MOeOV8
new ImprovedMergeSort(), yeE_1C .
new HeapSort() -gIuL
}; udp&U+L
KKGAk\X
public static String toString(int algorithm){ aZ*b"3
return name[algorithm-1]; S'Yg!KwX
} $w[@L7'(
tI*u"%#t
public static void sort(int[] data, int algorithm) { @o9EX }
impl[algorithm-1].sort(data); m?;)C~[
} EVgn^,
C0i:*1
public static interface Sort { VG&|fekF
public void sort(int[] data); |rW}s+Kcr
} 6}C4 SZ
YwoytoXK
public static void swap(int[] data, int i, int j) { M(b'4
int temp = data; v{Zh!mk* L
data = data[j]; UQ'D-eK
data[j] = temp; 2?QIK3"v
} &oTSff>p}
} 3c@Cb`w@