[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; Y_@"v#,
} A$~xG(
int i1=l; =u8D!AxT
int i2=mid+1; fT3*>^Uv
for(int cur=l;cur<=r;cur++){ v'Vt .m&9&
if(i1==mid+1) #\;>8
data[cur]=temp[i2++]; 9>Uq$B
else if(i2>r) (s"iC:D6U
data[cur]=temp[i1++]; C6d]tLE
else if(temp[i1] data[cur]=temp[i1++]; 'yd@GQM&
else 90T%T2K
data[cur]=temp[i2++]; yIIETE
} oM<!I0"gC+
} A*;?U2
_E6}XNS
} o}=.
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改进后的归并排序: sc8DY!|OYN
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package org.rut.util.algorithm.support; ns#~}2"d
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import org.rut.util.algorithm.SortUtil; 23-t$y]
h/Hl?O8[
/** D;zWksq
* @author treeroot 5!AV!A_Jp
* @since 2006-2-2 d;~ 3P
* @version 1.0 rer|k<k;]G
*/ voV:H[RD9
public class ImprovedMergeSort implements SortUtil.Sort { -+}5ma
T;!ukGoFP
private static final int THRESHOLD = 10; \E@s_fQ]
>{m2E8U0
/* iS1Gb$?
* (non-Javadoc) *q*HGW5
* nG"n-$A?<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !&`}]qQZ
*/ f<89$/w
public void sort(int[] data) { ^Cg^`n?@b
int[] temp=new int[data.length]; e3eVvl5]
mergeSort(data,temp,0,data.length-1); mF'-Is
} =3|pHc hJ4
~o@\ n
private void mergeSort(int[] data, int[] temp, int l, int r) { :)p)=c8%
int i, j, k; JoCA{Fa}
int mid = (l + r) / 2; a*Ss -y
if (l == r) PW%1xHLfk
return; dk_,YU'z
if ((mid - l) >= THRESHOLD) \Mb(6~nC
mergeSort(data, temp, l, mid); a}KK{Vqo`
else r219M)D?
insertSort(data, l, mid - l + 1); 8/3u/
if ((r - mid) > THRESHOLD) dL_QX,X-]
mergeSort(data, temp, mid + 1, r); H&X:!xa5
else AJyq>0p
insertSort(data, mid + 1, r - mid); aDL)|>"Q
[$l"-*s4
for (i = l; i <= mid; i++) { TZ_rsj/t
temp = data; x(PKFn
} 3ai (x1%
for (j = 1; j <= r - mid; j++) { QCOLC2I
temp[r - j + 1] = data[j + mid]; o]Wz6L
} )O3jQ_q=
int a = temp[l]; s`hav
int b = temp[r]; 3J%V%}mD
for (i = l, j = r, k = l; k <= r; k++) { XFW5AP
if (a < b) { qy_%~c87
data[k] = temp[i++]; [pii
a = temp; AnNPTi
} else { __!m*!sd
data[k] = temp[j--]; 6Rcua<;2P
b = temp[j]; vsKl#R B
} (I4y[jnD
} v f`9*xF
} P##Z[$IJ3
#?9Q{0e
/** 7*i}km
* @param data S%kS#U${|
* @param l McjS)4j&.
* @param i ,"Tjpdf
*/ y%4 Gp
private void insertSort(int[] data, int start, int len) { P5xI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q IM
} 91up^
} 0[/vQ+O]2
} bM"fk&
} s~^*+kq
rvic%bsk
堆排序： Ikj=`,a2B
_gKu8$o=-
package org.rut.util.algorithm.support; ]:&n-&@L
Ep mJWbU
import org.rut.util.algorithm.SortUtil; jYWw.g<
JA`H@qE
/** p1D()-
* @author treeroot LeSHRoD
* @since 2006-2-2 hK(tPl$
* @version 1.0 UfR~%p>K
*/ %[`a
public class HeapSort implements SortUtil.Sort{ 3_W{T@T
]>D)#
/* (non-Javadoc) <F7V=Er
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WfG(JJ
*/ 'wZ_4XjD
public void sort(int[] data) { mc ZGg;3
MaxHeap h=new MaxHeap(); %cX"#+e
h.init(data); d+6]u_J
for(int i=0;i h.remove(); ;i\C]*
System.arraycopy(h.queue,1,data,0,data.length); F$Q04Qw
} 3OP.12^
p0M=t-
private static class MaxHeap{ o.Oq__>$H
Nb;H`<JP
void init(int[] data){ tz4 ]hF
this.queue=new int[data.length+1]; , T\-;7
for(int i=0;i queue[++size]=data; &>(gt<C$
fixUp(size); 5 y
} :p>hW!~
} x=]S.XI
S`iR9{+&
private int size=0; KE.Dt
#Qh>z%Mn^3
private int[] queue; -7%X]
^Kqf~yS%
public int get() { .!RavEg+
return queue[1]; q[d)e6
} 5mgHlsDzu
[i7YVwG4
public void remove() { uWjU OJEe
SortUtil.swap(queue,1,size--); s;Y<BD
fixDown(1); ^.goO]
} Izo!rC
file://fixdown eLfvMPVo
private void fixDown(int k) { JA^v
int j; 7I}P*%(f
while ((j = k << 1) <= size) { #BY`h~&T
if (j < size %26amp;%26amp; queue[j] j++; #@qN8J}R
if (queue[k]>queue[j]) file://不用交换 OeElMRU"
break; !aNh!
SortUtil.swap(queue,j,k); *Zbuq8>
k = j; t-7og;^8k
} p[v#EyoC
} E0l_--
private void fixUp(int k) { \+nGOvM
while (k > 1) { 3`F) AWzdr
int j = k >> 1; =Z,5$6%)
if (queue[j]>queue[k]) H&4~Uo.5
break; x83a!9
SortUtil.swap(queue,j,k); 4w$_]ke
k = j; ?=Db@97
} ]@ M5_%p
} 1;lmu]I>)
KE}H&1PjU
} u[oUCTY
d]wD[]
} 1n=_y o
L":bI&V?:
SortUtil： _P7tnXww
1S:|3W
package org.rut.util.algorithm; SJ?)%[(T
#VGjCEeU
import org.rut.util.algorithm.support.BubbleSort; b]Z@^<_E
import org.rut.util.algorithm.support.HeapSort; A??@AP[7M
import org.rut.util.algorithm.support.ImprovedMergeSort; l7}g^\I
import org.rut.util.algorithm.support.ImprovedQuickSort; C~4PE>YtTv
import org.rut.util.algorithm.support.InsertSort; 8g~EL{'
import org.rut.util.algorithm.support.MergeSort; _\8qwDg"#e
import org.rut.util.algorithm.support.QuickSort; r8/l P}(F
import org.rut.util.algorithm.support.SelectionSort; NHQF^2\\
import org.rut.util.algorithm.support.ShellSort; )R2XU
x/fX`y|(}*
/** {b)~V3rsY
* @author treeroot $_;e>*+x
* @since 2006-2-2 DcD{*t?x
* @version 1.0 kv{}C)kt3
*/ ,IHb+K
public class SortUtil { G"SBYU
public final static int INSERT = 1; w#y0atsg'
public final static int BUBBLE = 2; ]j<Bo4~Il
public final static int SELECTION = 3; 0s#Kp49-
public final static int SHELL = 4; W"q@Qa`Bm
public final static int QUICK = 5; ,e722wz
public final static int IMPROVED_QUICK = 6; kOL'|GgK
public final static int MERGE = 7; OO) ~HV4\
public final static int IMPROVED_MERGE = 8; +IFw_3$
public final static int HEAP = 9; J^#:qk
23\RJpKb
public static void sort(int[] data) { 0&+k.Vg
sort(data, IMPROVED_QUICK); 9xI GV!
} 6xK[34~6
private static String[] name={ <Zb/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H}}$V7]^),
}; *e>]~Z,
7[#yu2
private static Sort[] impl=new Sort[]{ (!L5-8O
new InsertSort(), `)iY}Iu
new BubbleSort(), &[Xu!LP
new SelectionSort(), fV>CZ^=G
new ShellSort(), k?B[>aQn.0
new QuickSort(), )!bUR\
new ImprovedQuickSort(), K5>p89mZ
new MergeSort(), 2}6%qgnT-
new ImprovedMergeSort(), l|2D/K5
new HeapSort() V9yl4q-bL
}; s^Nw%KAv
- YqYcer
public static String toString(int algorithm){ b}^S.;vNj
return name[algorithm-1]; LpbsYl
} v X~RP *
WsU)Y&
public static void sort(int[] data, int algorithm) { ^2D1`,|N
impl[algorithm-1].sort(data); c_grPk2O4
} '@|_OmcY
1$/MrPT(b
public static interface Sort { &F *'B|n
public void sort(int[] data); 82{&# Vc
} N?Q+>
yF}OfK?0f
public static void swap(int[] data, int i, int j) { ))kF<A_MK
int temp = data; `>Tu|3%\
data = data[j]; tc;'oMUP
data[j] = temp; Qj{8?lew
} |~`as(@Ih
} +d}E&=p_