[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; nG5:H.)
} EJrQ9"x&n
int i1=l; ?6^KY+ 5`C
int i2=mid+1; DOo34l6#
for(int cur=l;cur<=r;cur++){ pzBd(d^*
if(i1==mid+1) 8>^O]5Wo`X
data[cur]=temp[i2++]; !U+XIr
else if(i2>r) nIP*yb}5
data[cur]=temp[i1++]; +Y^/0=6h
else if(temp[i1] data[cur]=temp[i1++]; a U*cwR
else Q_R&+@ju
data[cur]=temp[i2++]; *j= whdw%J
} hz+x)M`Y
} @xtfm.}
"^iw {]~U
} [^-DFq5@
5SY(:!
改进后的归并排序: a)8M'f_z
5AT[1@H(_
package org.rut.util.algorithm.support; {7X80KI
HTCn=MZm ?
import org.rut.util.algorithm.SortUtil; Yf(QU`w_
a2un[$Jq`
/** X8b= z9
* @author treeroot 2V#(1Hc!
* @since 2006-2-2 {^ ^)bf|1'
* @version 1.0 13P8Zmco
*/ 4jl-?
public class ImprovedMergeSort implements SortUtil.Sort { Nu'T0LPNq(
RI_3X5.KQ
private static final int THRESHOLD = 10; )W/mt[;
v [ 4J0
/* W]rK*Dc
* (non-Javadoc) 1yN/+Rq
* FHS6Mk26
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =)3tVH&
*/ um[nz
public void sort(int[] data) { *.J)7~(P
int[] temp=new int[data.length]; tPHDnh^n]
mergeSort(data,temp,0,data.length-1); PI#xRKt
} -Ug
x%JtI'sg
private void mergeSort(int[] data, int[] temp, int l, int r) { y#Ao6Od6
int i, j, k; gI qYIt
int mid = (l + r) / 2; 8`*Wl;9u
if (l == r) X99:/3MXB'
return; VMUK|pC4K
if ((mid - l) >= THRESHOLD) Ii/#cdgF
mergeSort(data, temp, l, mid); 54w..8'
else kmm1b (
insertSort(data, l, mid - l + 1); G:QaWqUb
if ((r - mid) > THRESHOLD) M3350
mergeSort(data, temp, mid + 1, r); mpBSd+;Z
else ;aip1Df
insertSort(data, mid + 1, r - mid); u+GtH;<;
CCOd4
for (i = l; i <= mid; i++) { r(IQ)\GR
temp = data; wPYz&&W
} G_{x)@
for (j = 1; j <= r - mid; j++) { )Ab!R:4
temp[r - j + 1] = data[j + mid]; YT6<1-E#
} LoQm&3/
int a = temp[l]; y1!c:&
int b = temp[r]; .AOf-a
for (i = l, j = r, k = l; k <= r; k++) { pDO&I]S`q0
if (a < b) { vlAYKtl3]
data[k] = temp[i++]; p`)(
a = temp; PK@hf[YHe
} else { n0:Y*Op
data[k] = temp[j--]; _6"!y ]Q
b = temp[j]; %Uj7g>
} rYbb&z!u
} o/bmS57
} y{ReQn3>y
\-Mzs 0R
/** ^b=9{.5
* @param data )2KQZMtgm]
* @param l sHx>UvN6
* @param i !fXwX3B
*/ !j,LS$tPu
private void insertSort(int[] data, int start, int len) { lL.3$Rp;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &o>ctf.x
} mrR~[533j
} s+;J`_M
} y#Je%tAe 2
} XRi/O)98o
DA'A-C2
堆排序： v0EF?$Wo
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package org.rut.util.algorithm.support; u2=gG.
rO8Q||@>A
import org.rut.util.algorithm.SortUtil; WVaIC$Y
xlQl1lOX
/** ^6*LuXPv
* @author treeroot Ul@Jg
* @since 2006-2-2 &w@~@]
* @version 1.0 Y{yN*9a79
*/ ]^9B%t s9
public class HeapSort implements SortUtil.Sort{ C1 qyjlR
0@;kD]Z
/* (non-Javadoc) 5r1{l%?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TE+d?
*/ 7gIK+1`
public void sort(int[] data) { >y<yFO{
MaxHeap h=new MaxHeap(); TUeW-'/1
h.init(data); Of|e]GR
for(int i=0;i h.remove(); OE,uw2uaT
System.arraycopy(h.queue,1,data,0,data.length); yl63VX8w}
} yxfV|ox
qucw%hJr
private static class MaxHeap{ UPtWj8h
C4V#qhj
void init(int[] data){ u+7B-l=u*
this.queue=new int[data.length+1]; 6*@\Qsp615
for(int i=0;i queue[++size]=data; rSTc4m1R
fixUp(size); -OLXRc=
} 9:tvkl
} `_L=~F8
j!c[$;
private int size=0; F12tOSfu*
\<ohe w
private int[] queue; k&\YfE3*
79J@`
public int get() { oYWcX9R
return queue[1]; /$OX'L&b
} !oXA^7Th6]
s }P-4Sg
public void remove() { t >89( k
SortUtil.swap(queue,1,size--); :P$I;YY=A
fixDown(1); ypxqW8Xe
} %I]?xe6
file://fixdown QC:/xP
private void fixDown(int k) { ns.[PJ"8
int j; 4uip!@$K
while ((j = k << 1) <= size) { #k%3Ag
if (j < size %26amp;%26amp; queue[j] j++; Ed/@&52z0
if (queue[k]>queue[j]) file://不用交换 }K=TB}yY
break; M4a-+T"
SortUtil.swap(queue,j,k); 7#Qa/[? D
k = j; ^ K8JE,
} (]BZ8GOx
} ^iJMUV|
private void fixUp(int k) { mfu>j,7l
while (k > 1) { +NRn>1]
int j = k >> 1; g{8R+
if (queue[j]>queue[k]) 0y4z`rzTn
break; \K 01F
SortUtil.swap(queue,j,k); Fz+0h"
k = j; P=&Je?
} ?V_Qa0k
} NF=FbvNe
1Oo^
} d#T8|#O"
&?3?8Q\
} :>lica_
qR<
SortUtil： `$`:PT\Zv4
h Ia{s)
package org.rut.util.algorithm; zY8"\ZB
[d!C6FT
import org.rut.util.algorithm.support.BubbleSort; X|L8s$>
import org.rut.util.algorithm.support.HeapSort; {Ny\9r
import org.rut.util.algorithm.support.ImprovedMergeSort; G?QFF6)}!
import org.rut.util.algorithm.support.ImprovedQuickSort; HSx~Fs^J
import org.rut.util.algorithm.support.InsertSort; @1P1n8mH]
import org.rut.util.algorithm.support.MergeSort; Pi6C1uY6
import org.rut.util.algorithm.support.QuickSort; 1$idF
import org.rut.util.algorithm.support.SelectionSort; h~elF1dG
import org.rut.util.algorithm.support.ShellSort; w;Qo9=-
MAR kTxzi
/** R_*b<~[/
* @author treeroot h`%K\C
* @since 2006-2-2 sXTt)J
* @version 1.0 {549&]/o
*/ QN-n9f8
public class SortUtil { nvD"_.KrJ
public final static int INSERT = 1; @Risabn
public final static int BUBBLE = 2; c i7;v9
public final static int SELECTION = 3; %R;cXs4r
public final static int SHELL = 4; *D<S \6=
public final static int QUICK = 5; h. i&[RnX
public final static int IMPROVED_QUICK = 6; U^Z[6u
public final static int MERGE = 7; 1s\10 hK1c
public final static int IMPROVED_MERGE = 8; J+\F)k>r
public final static int HEAP = 9; v\-"NHl
_DC/`_'
public static void sort(int[] data) { ~B(]0:
sort(data, IMPROVED_QUICK); ENC_#-1x
} B<1*p,z
private static String[] name={ dGIu0\J\$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n{BC m %
}; + y.IDn^
e+y< a~N
private static Sort[] impl=new Sort[]{ Q77qrx3
new InsertSort(), ![Ip)X OG
new BubbleSort(), r %0
new SelectionSort(), *`}_e)(k
new ShellSort(), ts;_T..L
new QuickSort(), />ob*sk/Y
new ImprovedQuickSort(), 8.pz?{**T
new MergeSort(), V"$t>pAG
new ImprovedMergeSort(), TP{a*ke^5,
new HeapSort() puqLXDjA/
}; CHeG{l)<r
$+Pv fQ
public static String toString(int algorithm){ "fpj"lf-
return name[algorithm-1]; iLmU|jdE
} ys#M* {?
]3={o3[:
public static void sort(int[] data, int algorithm) { (la<X<w
impl[algorithm-1].sort(data); $#RD3#=?u
} {6%uNT>|
0[v:^H
public static interface Sort { /#:RYM'Tu
public void sort(int[] data); ~5!ukGK_
} ?>%u[g
IN%>46e`
public static void swap(int[] data, int i, int j) { :/~vaCZ
int temp = data; e-e{-pB6
data = data[j]; 0'py7
data[j] = temp; Q|ik\
} c<DYk f
} JG( <