[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; CvSIV7zYo
} ?Ea;J0V
int i1=l; jl.p'$Fbn
int i2=mid+1; f 3V Dv9(
for(int cur=l;cur<=r;cur++){ gN8hJG'0
if(i1==mid+1) $,=6[T!z+e
data[cur]=temp[i2++]; SvM6iZ]
else if(i2>r) S_MyoXV
data[cur]=temp[i1++]; z}QwP~Z
else if(temp[i1] data[cur]=temp[i1++]; H(c72]@Vg
else lf{e[!ML'
data[cur]=temp[i2++]; ~)LH='|h\}
} E907fX[R~
} Ix@&$!'k
9_s6l
} ='ZRfb&
)~4II.`%^
改进后的归并排序: Mv544>:
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package org.rut.util.algorithm.support; EKEjv|_)
$EZN1\
import org.rut.util.algorithm.SortUtil; _ nA p6i
$n^MD_1!
/** @bM2{Rh:
* @author treeroot =!O*/6rz
* @since 2006-2-2 sIG7S"k>p
* @version 1.0 Y?CCD4"qn
*/ 6=4wp?
public class ImprovedMergeSort implements SortUtil.Sort { El_wdbbT
nkxzk$
private static final int THRESHOLD = 10; Hgeg@RP Q
ORGD
/* >z;[2n'
* (non-Javadoc) AqKz$
* fx=Awba
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,g-EW jN
*/ rk+#GO{
public void sort(int[] data) { WV3|?,y]qm
int[] temp=new int[data.length]; KoE8Mp
mergeSort(data,temp,0,data.length-1); T{V/+RM
} 8`4<R6]LKB
{,*"3O:\:
private void mergeSort(int[] data, int[] temp, int l, int r) { 2"|2a@
int i, j, k; p.ANVA@:
int mid = (l + r) / 2; !CXt*/~
if (l == r) ]2#
return; bfB\h*XO
if ((mid - l) >= THRESHOLD) '1,,)U#6E
mergeSort(data, temp, l, mid); EXP%Mk/
else U4m9e|/H;z
insertSort(data, l, mid - l + 1); s]mo$ _na
if ((r - mid) > THRESHOLD) LmlXMia
mergeSort(data, temp, mid + 1, r); E$W{8?:{
else Y2xL>F
insertSort(data, mid + 1, r - mid); }I3gU
G+B~Ix-
for (i = l; i <= mid; i++) { M02uO`Y9
temp = data; CTWn2tpW
} t+5E#!y
for (j = 1; j <= r - mid; j++) { mj|)nOd
temp[r - j + 1] = data[j + mid]; mNmLyU=d
} {x'GJtpb
int a = temp[l]; V.os
int b = temp[r]; O: @}lK+H
for (i = l, j = r, k = l; k <= r; k++) { 6KD `oUx
if (a < b) { <%xS{!'}
data[k] = temp[i++]; kb[P\cRa
a = temp; iA8U Yd3Q
} else { 0sI1GhVR
data[k] = temp[j--]; y=In?QN{6*
b = temp[j]; QO"oEgB`+Z
} h;=6VgXZ
} : ^ 8
} (`SRJ$~f
USFDy
/** &1+X\c+tb
* @param data '9c2Q/
* @param l jiF?fX@
* @param i U4 13?Pe
*/ 'J,T{s1J
private void insertSort(int[] data, int start, int len) { !61Pl/uQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !LkWzn3
} PW3GL3+
} \*,=S52
} }g$(+1g
} G^q3Z#P
gM [w1^lj
堆排序： m*$|GW9
]f]<4HD=i
package org.rut.util.algorithm.support; 8/0Y vh
*3T|M@Y
import org.rut.util.algorithm.SortUtil; h"H2z1$
k}KC/d9.z
/** YeF1C/'hy
* @author treeroot 7' S@3
* @since 2006-2-2 =)hVn
* @version 1.0 p7:{^
*/ AfG/JWSo}
public class HeapSort implements SortUtil.Sort{ F:6SPY y
=]-j;#'&
/* (non-Javadoc) 6a;v&5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nFe%vu8a
*/ Rb(SBa
public void sort(int[] data) { >J|]moSVA
MaxHeap h=new MaxHeap(); a_h]?5 :c
h.init(data); C>[Uvc
for(int i=0;i h.remove(); $T :un.TM
System.arraycopy(h.queue,1,data,0,data.length); g;ZxvR)ZJk
} ICAH G7,
Me6+~"am/
private static class MaxHeap{ lN9=TxH1(;
XQ4G)
void init(int[] data){ "B_K XL
this.queue=new int[data.length+1]; w '3#&k+
for(int i=0;i queue[++size]=data; ~4?9a(>3
fixUp(size); xQw7 :18wQ
} G;f/Tch
} F@R1:M9*
gocrjjAHk
private int size=0; tK k#LWB
?BhMjsy.
private int[] queue; 4(-bx.V
1 { , F
public int get() { J[^}u_z
return queue[1]; "_2Ng<2
} :ujCr.
TNQP"9[?
public void remove() { s}pIk.4ot!
SortUtil.swap(queue,1,size--); }8;[O 9
fixDown(1); V'w@rc\XN
} w&xDOyW]
file://fixdown O$IjNx
private void fixDown(int k) { m^x6>9,
int j; au,t%8AC
while ((j = k << 1) <= size) { ^<X@s1^#
if (j < size %26amp;%26amp; queue[j] j++; g#]wLm#
if (queue[k]>queue[j]) file://不用交换 @y31NH(
break; waKT{5k
SortUtil.swap(queue,j,k); $ "Bh]-
k = j; pHoEa7:
} Bo5ZZY
} 8( btZt
private void fixUp(int k) { z"*/mP2
while (k > 1) { 7z~_/mAI
int j = k >> 1; -R{V-
if (queue[j]>queue[k]) b=3H
break; i|1^+;
SortUtil.swap(queue,j,k); qYhs|tY)
k = j; oA1a/[#
} w1;hy"zPsj
} )G7=G+e;
:W@#) 1=
} Kt0(gQOr0
?'"X"@r5
} 9;xM%
TNJG#8n%Y
SortUtil： MQKfJru7
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package org.rut.util.algorithm; gl).cIpw
eSW{Cb
import org.rut.util.algorithm.support.BubbleSort; $`Ix:gi
import org.rut.util.algorithm.support.HeapSort; U?.9D
import org.rut.util.algorithm.support.ImprovedMergeSort; ^fz+41lE\
import org.rut.util.algorithm.support.ImprovedQuickSort; L],f3<
import org.rut.util.algorithm.support.InsertSort; wW>)(&!F
import org.rut.util.algorithm.support.MergeSort; w\}?(uO
import org.rut.util.algorithm.support.QuickSort; >[6{LAe~hp
import org.rut.util.algorithm.support.SelectionSort; ?bw4~
import org.rut.util.algorithm.support.ShellSort; KR"M/#
~H6r.:]
/** _4cvX
* @author treeroot wb Iq&>p
* @since 2006-2-2 kF>o.uSV
* @version 1.0 {)AMwq
*/ 4~U'TE @
public class SortUtil { jmg!Ml
public final static int INSERT = 1; pKS {6P
public final static int BUBBLE = 2; {-BRt)L[
public final static int SELECTION = 3; f3|@|' ;
public final static int SHELL = 4; FYS/##r
public final static int QUICK = 5; upvS|KUil
public final static int IMPROVED_QUICK = 6; -R>}u'EG>
public final static int MERGE = 7; X\}Y
public final static int IMPROVED_MERGE = 8; Bvt@X
public final static int HEAP = 9; ;60.l!
R/`q/0T.
public static void sort(int[] data) { }KhjlPhx
sort(data, IMPROVED_QUICK); 7H>@iI"?
} n[YEOkiG
private static String[] name={ yz2Ci0Dwy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :iR \%
}; !gnj]k&/c
o->\vlbD
private static Sort[] impl=new Sort[]{ $Ci0I+5w
new InsertSort(), !`bio cA
new BubbleSort(), ,7XtH>2s
new SelectionSort(), SR*wvQnOx
new ShellSort(), ?|e'Gbb_
new QuickSort(), (Z5##dS3
new ImprovedQuickSort(), @E.k/G!~Nb
new MergeSort(), 1 y}2+Kk
new ImprovedMergeSort(), ! Q<>3xZ
new HeapSort() lcV<MDS
}; ET];%~ ^
&uUo3qXQ5l
public static String toString(int algorithm){ >yJ9U,Y
return name[algorithm-1]; dz>;<&2Z
} *Ei|fe$sa
NA,CZ
public static void sort(int[] data, int algorithm) { c#N<"cy>
impl[algorithm-1].sort(data); _lW+>xQ
} [7m1Q<
ny-7P;->8
public static interface Sort { I]!^;))
public void sort(int[] data); ob_I]~^I?|
} fIF<g@s
r}yG0c,
public static void swap(int[] data, int i, int j) { %r)avI
int temp = data; F_uY{bg
data = data[j]; ;IK[Y{W/
data[j] = temp; Jx#k,Z4
} v+"rZ
} '&;yT[