[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; q}tLOVu1
} m/%sBw\rx
int i1=l; j$A~3O<e"
int i2=mid+1; =R?NOWrDY
for(int cur=l;cur<=r;cur++){ 4 K{4=uU
if(i1==mid+1) 3(}HD*{E[@
data[cur]=temp[i2++]; &FIPEe#n
else if(i2>r) mTYEK4}
data[cur]=temp[i1++]; nXk<DlTws
else if(temp[i1] data[cur]=temp[i1++]; L&Bc-kMH
else E,u@,= j
data[cur]=temp[i2++]; L5of(gQ5]
} EM;]dLh
} u0#q)L8
2|kx:^D p
} qA#!3<
kOx2P(UAEx
改进后的归并排序: ZVVK:dDgt
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package org.rut.util.algorithm.support; G;qC&7T
oAA%pZ@
import org.rut.util.algorithm.SortUtil; dBX%/
PDzVXLpC
/** rH$0h2
* @author treeroot e ,k,L
* @since 2006-2-2 ZVR0Kzu?Ra
* @version 1.0 W$v5o9\Px
*/ uRh`qnL
public class ImprovedMergeSort implements SortUtil.Sort { 0^5SL/2
`\(Fax
private static final int THRESHOLD = 10; 2Do^N5y
sr sDnf
/* a(NN%'fDD
* (non-Javadoc) FG38)/
* %=S~[&8C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4[9~g=y>
*/ wH3FCfvm
public void sort(int[] data) { /4<eI3Z
int[] temp=new int[data.length]; |/Am\tk#13
mergeSort(data,temp,0,data.length-1); uw&GXOzew9
} Gnr]qxL
_hMMm6a|
private void mergeSort(int[] data, int[] temp, int l, int r) { \@8$tQCZ
int i, j, k; {Fta4D_1N
int mid = (l + r) / 2; d/+sR@\
if (l == r) T""X~+{Z@
return; 5 b( [1*
if ((mid - l) >= THRESHOLD) ~*ZB2
mergeSort(data, temp, l, mid); kb Fr
else $oHlfV/!
insertSort(data, l, mid - l + 1); ,pq<.?&E
if ((r - mid) > THRESHOLD) h$_Wh(
mergeSort(data, temp, mid + 1, r); &-470Z%/
else !r,ZyJU
insertSort(data, mid + 1, r - mid); dMp7 ,{FhF
g(7htWr4
for (i = l; i <= mid; i++) { XD<7d")I
temp = data; KCGs*kp>
} /iQ}DbtRb
for (j = 1; j <= r - mid; j++) { t IdH?x
temp[r - j + 1] = data[j + mid]; 0e^j:~*
} C=t:0.:PJ
int a = temp[l]; -P]J:7*0?\
int b = temp[r]; jW}n6w5
for (i = l, j = r, k = l; k <= r; k++) { 9qc1^Fs~
if (a < b) { xO`w|k
data[k] = temp[i++]; { KE[8n
a = temp; j/5>zS
} else { ,]w-!I
data[k] = temp[j--]; )**k3u t4
b = temp[j]; !Ui3}
} _Z~wpO}/
} Z=_p
} 3/H^YM @
7v}4 Pl,$4
/** J/pW*G-U|
* @param data U SXz
* @param l R4"["T+L`
* @param i (d |
*/ $h0]
private void insertSort(int[] data, int start, int len) { if9I7@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `o8b\p\zn
} xAMj16ZF
} Oj:O-PtN2
} `zAV#
} l!ltgj
f#pT6
堆排序： w;vp X>
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package org.rut.util.algorithm.support; [R)?93
z%Ywjfn'
import org.rut.util.algorithm.SortUtil; mDC{c ?
w1F7gd
/** {c<MB xk
* @author treeroot NIrK+uC.d
* @since 2006-2-2 2lDgvug
* @version 1.0 2mP| hp?
*/ b#FN3AsR
public class HeapSort implements SortUtil.Sort{ v1?P$f*g
m=k(6
/* (non-Javadoc) N+rLbK*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^2[0cne
*/ U5jY/e_
public void sort(int[] data) { 41>Bm*if
MaxHeap h=new MaxHeap(); :Qh5ZO&G0
h.init(data); udX4SBq-pC
for(int i=0;i h.remove(); wa6DJ
System.arraycopy(h.queue,1,data,0,data.length); ',n;ag`c
} #.?DsK_:@
s/0-DHd
private static class MaxHeap{ 9aD6mp
`W e M
void init(int[] data){ 9Xmb_@7b}
this.queue=new int[data.length+1]; lb2mWsg"
for(int i=0;i queue[++size]=data; i >Hh_q;'
fixUp(size); O?p.kf{b
} Mc oHV]x
} =L{lt9qQz
_SjS^z~
private int size=0; #dE#w#=r
J\b,rOIf
private int[] queue; \/$T 3f`x
ptQr8[FA
public int get() { 1 h|cr_
return queue[1]; E)o/C(g
} HuBG?4Qd
+ 1\1Z@\M
public void remove() { 4JKB6~Y
SortUtil.swap(queue,1,size--); Vj_(55WQ
fixDown(1); :T"!6;
} k{Vc5F
file://fixdown N*$<Kjw
private void fixDown(int k) { x~!B.4gT2
int j; 2/sD#vC
while ((j = k << 1) <= size) { w&f8AY)#]4
if (j < size %26amp;%26amp; queue[j] j++; kEf}yTy
if (queue[k]>queue[j]) file://不用交换 }OJ*o
break; `sQ\j Nu
SortUtil.swap(queue,j,k); @4^5C-
k = j; L^yQb4$&M
} quN7'5ZC[
} .21%~"dxJ
private void fixUp(int k) { >Bq;Z}EV
while (k > 1) { 90|p]I%
int j = k >> 1; JQYIvo1,Q
if (queue[j]>queue[k]) K~z*P0g*
break; iaQ[}'6!$
SortUtil.swap(queue,j,k); Z^`&Z3s
k = j; p/ pVMR
} M(HU^?B{'
} yBE1mA:x7:
f)H6 nl7r
} V^QKn+/
( t#w@<
} ^+oi|y
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SortUtil： C6,GgDH`
p18-yt; 1
package org.rut.util.algorithm; h>sz@\{
OYzt>hdH
import org.rut.util.algorithm.support.BubbleSort; #B8`qFpQC
import org.rut.util.algorithm.support.HeapSort; QG?7L_I
import org.rut.util.algorithm.support.ImprovedMergeSort; sqi~j(&\1
import org.rut.util.algorithm.support.ImprovedQuickSort; vD D !.i
import org.rut.util.algorithm.support.InsertSort; D$q"k"
import org.rut.util.algorithm.support.MergeSort; |Yh-`~~A"
import org.rut.util.algorithm.support.QuickSort; 5'@J}7h
import org.rut.util.algorithm.support.SelectionSort; G]E$U]=9r:
import org.rut.util.algorithm.support.ShellSort; V.)y7B
@;qC% +^
/** nMx0+N1
* @author treeroot jFM8dl n
* @since 2006-2-2 >F8&wh'BjY
* @version 1.0 _s><>LH~
*/ /D`M?nD7
public class SortUtil { sSd
public final static int INSERT = 1; !H{)L@f
public final static int BUBBLE = 2; EJjTf:
public final static int SELECTION = 3; ;38W41d{
public final static int SHELL = 4; :^0g}8$<
public final static int QUICK = 5; Re5m
public final static int IMPROVED_QUICK = 6; \3n{%\_
public final static int MERGE = 7; & d\`=e
public final static int IMPROVED_MERGE = 8; 9Re605xQ6
public final static int HEAP = 9; d8<Lk9H9R
J_}&Btb)e
public static void sort(int[] data) { Xx[ LK
sort(data, IMPROVED_QUICK); p|,K2^?Y
} 7loCb4Hv
private static String[] name={ (9';zw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LeO ))
}; %56pP"w
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private static Sort[] impl=new Sort[]{ @I\Z2-J
new InsertSort(), jz't!wj
new BubbleSort(), {.bLh0
new SelectionSort(), 5 usfyY]z
new ShellSort(), daaUC
new QuickSort(), '[-gKn
new ImprovedQuickSort(), AJ2Xq*fk
new MergeSort(), 5IW^^<kiu
new ImprovedMergeSort(), "M v%M2'c
new HeapSort() _t6siB_u
}; YP>VC(f
&YO5N4X~o
public static String toString(int algorithm){ +1Si>I
return name[algorithm-1]; BS;rit:
} |~8\{IcZ
75K~ebRr
public static void sort(int[] data, int algorithm) { Vm'ReH
impl[algorithm-1].sort(data); Tr)a6Cf
} (6u<w#u
W0tBF&E"
public static interface Sort { |o~FKy1'z\
public void sort(int[] data); Vyj>&"28
} .2Q`. o)
,Ot3N\%yn
public static void swap(int[] data, int i, int j) { DG8$zl5
int temp = data; t"2WJ-1k}
data = data[j]; bVtboHlY
data[j] = temp; TcZ Ci^1F
} 1KruGq~
} -2v|d]3qG