[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; FGhrf
} 0M2+?aKif
int i1=l; Xtnmh)'K~#
int i2=mid+1; 'z!#E!i
for(int cur=l;cur<=r;cur++){ f|1FqL+T]
if(i1==mid+1) bJ!f,a'/
data[cur]=temp[i2++]; {:OVBX
else if(i2>r) r74w[6(
data[cur]=temp[i1++]; s(Bi&C\
else if(temp[i1] data[cur]=temp[i1++]; >M85xjXP
else 7gmMqz"z(>
data[cur]=temp[i2++]; *`'%tp"'+
} eG>Fn6G<g
} IVODR
Cs=i9.-A
} Qh%vh;|^
jN>UW}?
改进后的归并排序: Y,}43a0A
e;r-}U
package org.rut.util.algorithm.support; D|3QLG
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import org.rut.util.algorithm.SortUtil; @soW f
3edK$B51;
/** Vzm7xl [
* @author treeroot %t.IxMY
* @since 2006-2-2 6.=1k
* @version 1.0 vGp@YABM
*/ ~x|Sv4M
public class ImprovedMergeSort implements SortUtil.Sort { c2:kZxT
_tJURk%
private static final int THRESHOLD = 10; }kefrT
~2ei+#d!^
/* |q)Q<%VS'
* (non-Javadoc) A~SSu.L@
* Mn;CG'FA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c4W"CD;D
*/ 90D.G_45
public void sort(int[] data) { X]%4QIeS
int[] temp=new int[data.length]; }gaKO 5
mergeSort(data,temp,0,data.length-1); 8GQs9
} U<byR!qLie
~3]8f0^%m
private void mergeSort(int[] data, int[] temp, int l, int r) { OZ9j3Q;a$
int i, j, k; )dDmq
int mid = (l + r) / 2; (:]iHg3
if (l == r) WTN!2b
return; ,W;8!n0
if ((mid - l) >= THRESHOLD) WLFzLW=PD
mergeSort(data, temp, l, mid); H}rP{`m
else NO1]JpR
insertSort(data, l, mid - l + 1); vbJMgdHFR
if ((r - mid) > THRESHOLD) c3-bn #
mergeSort(data, temp, mid + 1, r); Gl1$W=pR:
else $7g(-W
insertSort(data, mid + 1, r - mid); J3^Ir [
]2 N';(R
for (i = l; i <= mid; i++) { G&Sg.<hn
temp = data; =5F49
} c~;.m<yrf
for (j = 1; j <= r - mid; j++) { P~>nlm82]
temp[r - j + 1] = data[j + mid]; EJY:C9W
} l]cQ7g5
int a = temp[l]; y+h=x4t
int b = temp[r]; ga%77t|jm3
for (i = l, j = r, k = l; k <= r; k++) { Q"uu&JC
if (a < b) { aW5~z^I
data[k] = temp[i++]; izA3INT
a = temp; {+}Lc$O#C
} else { UQr+\ u
data[k] = temp[j--]; I!~Omr@P
b = temp[j]; roQIP%h!
} a)b@en;v
} /2I("x]
} Gu=bPQOj
,oe4*b}O=.
/** %VZ\4+8S
* @param data 9!h+LGs(,
* @param l )I_I?e
* @param i af{K4:I
*/ c8MNo'h
private void insertSort(int[] data, int start, int len) { G&-h,"yo^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Stpho4+/y
} Ho|n\7$
} uqH;1T;s
} 54&2SU$kx
} 6!N&,I
hG]20n2
堆排序： E}+A)7mA
:=@[FXD4
package org.rut.util.algorithm.support; FT6cOMu
2{\Y<%.
import org.rut.util.algorithm.SortUtil; }_x oT9HUr
8%B @[YDe
/** zwS'AN'A
* @author treeroot __[q`
* @since 2006-2-2 J4; ".Y=
* @version 1.0 dl4.jLY
*/ ap!<8N
public class HeapSort implements SortUtil.Sort{ !)]3@$#
;MD{p1w
/* (non-Javadoc) 3 -FNd~%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `)fGw7J {
*/ usip>y
public void sort(int[] data) { Ws(>} qjy
MaxHeap h=new MaxHeap(); R_}(p2
h.init(data); @ ri.r1
for(int i=0;i h.remove(); xM,3F jF
System.arraycopy(h.queue,1,data,0,data.length); s zg1.&
} rO~D{)Nu
t30V_`eQ
private static class MaxHeap{ A(B2XBS!?
as8<c4:v
void init(int[] data){ 2},}R'aR
this.queue=new int[data.length+1]; s_N!6$tS
for(int i=0;i queue[++size]=data; 0=iJT4IEJ
fixUp(size); _ U\vHa$#
} sQvEUqy9
} KqQrxi?f-
^B/{
private int size=0; rRW&29A
&wfM:a/c
private int[] queue; |V&k1{V
2#^[`sFPO
public int get() { Z3d&I]Tf
return queue[1]; f]4gDmn^
} E=E
/T@lHxX
public void remove() { d=pq+
SortUtil.swap(queue,1,size--); sC j3h
fixDown(1); -?[:Zn~$a
} -T>`PJpJuL
file://fixdown Z.<B>MD8^
private void fixDown(int k) { MX34qJ9k
int j; H>B:jJf
while ((j = k << 1) <= size) { @S}'_g
if (j < size %26amp;%26amp; queue[j] j++; S=Zjdbd
if (queue[k]>queue[j]) file://不用交换 O_033&
break; V2*b f`/V
SortUtil.swap(queue,j,k); bm^ou#]|
k = j; C>HUG
} ^t*BWJxPC
} %$08*bAtB7
private void fixUp(int k) { b4Z#]o
while (k > 1) { 2yNlQP8%
int j = k >> 1; sbVeB%k
if (queue[j]>queue[k]) +MEWAW[}^
break; SE\`JGA[
SortUtil.swap(queue,j,k); p`It=16trT
k = j; `CV a`%
} ,[x'S>N
} {974m` 5
~ rRIWfhb
} q+z,{K
Sb<=ROCg@
} ,^3D"Tky
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SortUtil： +um; eL7
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package org.rut.util.algorithm; *{ .u\BL5
J&5|'yVX
import org.rut.util.algorithm.support.BubbleSort; "_^FRz#h
import org.rut.util.algorithm.support.HeapSort; 7YsFe6D"
import org.rut.util.algorithm.support.ImprovedMergeSort; ^E9@L??
import org.rut.util.algorithm.support.ImprovedQuickSort; :Q%&:[2
import org.rut.util.algorithm.support.InsertSort; nQ mkDPjU
import org.rut.util.algorithm.support.MergeSort; *I~F7Z]|
import org.rut.util.algorithm.support.QuickSort; e='3gzz
import org.rut.util.algorithm.support.SelectionSort; a*=e 3nS
import org.rut.util.algorithm.support.ShellSort; ,}NG@JID
k;%}%"EVZ
/** q+N}AKawB
* @author treeroot &B) F_EI
* @since 2006-2-2 Ws=J)2q
* @version 1.0 Z/64E^
*/ (T@ov~@
public class SortUtil { te1lUQ
public final static int INSERT = 1; A2B&X}K|U
public final static int BUBBLE = 2; 'h:4 Fzo<
public final static int SELECTION = 3; _PuMZjGL
public final static int SHELL = 4; 2 `#|;x^<
public final static int QUICK = 5; %j=7e@
public final static int IMPROVED_QUICK = 6; _onHe"%{
public final static int MERGE = 7; ALFw[1X
public final static int IMPROVED_MERGE = 8; <#c2Hg%jh
public final static int HEAP = 9; k07O.9>
S>6APQ-
public static void sort(int[] data) { ohwQ%NDl
sort(data, IMPROVED_QUICK); w^r*qi"
} zFOX%q
private static String[] name={ ?&?y-&.5-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]^s4NXf+
}; p0-\G6
qoEOM%dAqV
private static Sort[] impl=new Sort[]{ >~6 ;9{@
new InsertSort(), <{'':/tXI
new BubbleSort(), BYu|loc
new SelectionSort(), e Q0bx&
new ShellSort(), ?L_#AdK
new QuickSort(), *FO']D
new ImprovedQuickSort(), ~Su>^T(?-
new MergeSort(), $BG9<:p
new ImprovedMergeSort(), pt<84CP
new HeapSort() g|W~0A@D
}; r8@:Ko= a
hj-M #a
public static String toString(int algorithm){ E;%{hAD{
return name[algorithm-1]; 0O[q6!&]
} #u#s'W
Nz2}Ma 2
public static void sort(int[] data, int algorithm) { F7mzBrz
impl[algorithm-1].sort(data); 1y>P<[
} '*K/K],S]
,5<-\"{]
public static interface Sort { [3j]r{0I
public void sort(int[] data); iE$0-Qe[3
} $)kIYM&
J)*y1
public static void swap(int[] data, int i, int j) { 4H{L>e
int temp = data; i<-#yL5
data = data[j]; @T1-0!TM')
data[j] = temp; MYLq2g\
} 4/HyO\?z5
} Ff|?<\x0}A