[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; ;X?}x%$
} |'P]GK
int i1=l; SQBa;hvgM
int i2=mid+1; &]"
for(int cur=l;cur<=r;cur++){ 8ja$g,
if(i1==mid+1) 7X0Lq}G@
data[cur]=temp[i2++]; k;K)xb[w|
else if(i2>r) U 9_9l7&r
data[cur]=temp[i1++]; (D#B_`;-
else if(temp[i1] data[cur]=temp[i1++]; fkuLj%R
else ii[F]sR\
data[cur]=temp[i2++]; 3h;{!|-3
} Y2a5bc P
} h1B? 8pD
qaiNz S@q
} W5EDVPur
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改进后的归并排序: /Y9>8XSc
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package org.rut.util.algorithm.support; :[wsKFaV+
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import org.rut.util.algorithm.SortUtil; ah+~y,Gl
C7rNV0.Fq
/** JJP08oP
* @author treeroot S>h;K`
* @since 2006-2-2 15%w 8u
* @version 1.0 '8Q]C*Z
*/ xbdN0MAU
public class ImprovedMergeSort implements SortUtil.Sort { rM`X?>iT+
iq8GrdL"
private static final int THRESHOLD = 10; {IxA)v-`
jr)1(**
/* (!ZM{Js%
* (non-Javadoc) Q\^O64geD
* S|SV$_ (
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X &uTSgN
*/ AJh w
public void sort(int[] data) { 1n=lqn/
int[] temp=new int[data.length]; &~8oQC-eF
mergeSort(data,temp,0,data.length-1); N >FKy'.gk
} !TAlBkj
f%SZg!+t
private void mergeSort(int[] data, int[] temp, int l, int r) { KC/=TSSXd.
int i, j, k; &M46&^Jho
int mid = (l + r) / 2; kStnb?nk
if (l == r) v=0(~<7B
return; GR&z,
if ((mid - l) >= THRESHOLD) .:@Ykdm4I
mergeSort(data, temp, l, mid); fKeT,U`W
else )Ub_@)X3%l
insertSort(data, l, mid - l + 1); kh {p%<r{
if ((r - mid) > THRESHOLD) 7op`s5i
mergeSort(data, temp, mid + 1, r); &+cEV6vb+
else iIMd!Q.)@
insertSort(data, mid + 1, r - mid); ~D<IB#C
D&od?3}E
for (i = l; i <= mid; i++) { .n#@$ nGZ
temp = data; Mmxlp.l
} 5*+!+V^?X
for (j = 1; j <= r - mid; j++) { (zgW%{V@
temp[r - j + 1] = data[j + mid]; C>-aIz!y
} O[I\A[*
int a = temp[l]; @OV|]u
int b = temp[r]; ~<O7$~
for (i = l, j = r, k = l; k <= r; k++) { q;R],7Re
if (a < b) { MLoYnR^
data[k] = temp[i++]; G}:w@}h/
a = temp; p~SClaR3H
} else { wfNk=)^$
data[k] = temp[j--]; RX>xB
b = temp[j]; dYG,_ji
} v'U{/ ,x
} % 5m/
} qAAX;N
z>XrU>}
/** \?Z{hmN
* @param data Q3 u8bx|E
* @param l w\(.3W7
* @param i NL!u<6y
*/ ABQa 3{v
private void insertSort(int[] data, int start, int len) { OjFLPGRCh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =8t]\Y?
} +aJ>rR
} x.f]1S7h[
} fI{ESXU
} tasIDoo+!J
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堆排序： 2[Z,J%:0
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package org.rut.util.algorithm.support; P#RR9>Q
^Y@\1fX 4e
import org.rut.util.algorithm.SortUtil; SLkhCR
VRI0W`
/** Jbjmv:db
* @author treeroot j<Bkj/
* @since 2006-2-2 )we}6sE"
* @version 1.0 .}q&5v
*/ vK9E
public class HeapSort implements SortUtil.Sort{ ]Bcp;D
E;Y;z
/* (non-Javadoc) M!/Cknm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]!I7Y.w6
*/ $*AYcy7
public void sort(int[] data) { o$#G0}yn
MaxHeap h=new MaxHeap(); -&3hEv5
h.init(data); 4?ICy/,U-
for(int i=0;i h.remove(); gLE:g5v6
System.arraycopy(h.queue,1,data,0,data.length); I,0q4
} JBi*P.79^
}])oM|fgO
private static class MaxHeap{ )\eI;8
%+j8["VEC
void init(int[] data){ LW[9
this.queue=new int[data.length+1]; m;'6MHx;
for(int i=0;i queue[++size]=data; PK{acen
fixUp(size); jF0jkj1&/[
} {)BTR%t
} UmKI1l
iH/6M
private int size=0; d{SG Cr 9d
Jth[DUH8H
private int[] queue; n@C[@?D
`-(|>5wWS
public int get() { oXb;w@:
return queue[1]; Fx;QU)1l3
} )6q,>whI]
# WAZ9,t
public void remove() { YE|SKx@
SortUtil.swap(queue,1,size--); Tw""}|] g
fixDown(1); G&i!Hs
} (#Wu#F1;
file://fixdown 1DE1.1
private void fixDown(int k) { ;A]@4*q
int j; {@+Ty]e
while ((j = k << 1) <= size) { Yzh"1|O
if (j < size %26amp;%26amp; queue[j] j++; Hkwl>R$
if (queue[k]>queue[j]) file://不用交换 #73F} tZ^
break; i.3=!6z
SortUtil.swap(queue,j,k); P{wF"vf
k = j; MUTj-1H6)
} iPd[l{85Z
} *h'=3w:G
private void fixUp(int k) { 0w)^)
while (k > 1) { l:j4Ft 8
int j = k >> 1; N'^&\@)xiU
if (queue[j]>queue[k]) _a6[{_Pc
break; ~yH?=:>U
SortUtil.swap(queue,j,k); swM*k;$q{
k = j; q(`/Vo4g(
} rEB@$C^
} P(+&OoY2
RloK,bg
} n?- })
{so`/EWa
} [H6hyG~
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SortUtil： D|e uX7b
k@/sn(x
package org.rut.util.algorithm; fh](K'P#^
-Z 4e.ay5
import org.rut.util.algorithm.support.BubbleSort; 555XCWyrC
import org.rut.util.algorithm.support.HeapSort; -_1>C\h"
import org.rut.util.algorithm.support.ImprovedMergeSort; 8=NM|i
import org.rut.util.algorithm.support.ImprovedQuickSort; gj*+\3KO@a
import org.rut.util.algorithm.support.InsertSort; j!U-'zJ
import org.rut.util.algorithm.support.MergeSort; Dpl A?
import org.rut.util.algorithm.support.QuickSort; .P[ _<8
import org.rut.util.algorithm.support.SelectionSort; Cj{1H([-
import org.rut.util.algorithm.support.ShellSort; }+C2I
H@%GSE
/** Uk^B"y_
* @author treeroot (C@mLu)
* @since 2006-2-2 I@yCTluV$
* @version 1.0 K i'Fn"
*/ 5@+,Xh,H|t
public class SortUtil { ,N!o
public final static int INSERT = 1; 2E}*v5b,
public final static int BUBBLE = 2; P_*" dza
public final static int SELECTION = 3; _V7r1fY:
public final static int SHELL = 4; umt.Um.m2
public final static int QUICK = 5; YVHm{A1b0
public final static int IMPROVED_QUICK = 6; FB{KH .
public final static int MERGE = 7; -OapVac
public final static int IMPROVED_MERGE = 8; ;#vKi0V7
public final static int HEAP = 9; whi`Z:~
23Nw!6S
public static void sort(int[] data) { ;\14b?TUH
sort(data, IMPROVED_QUICK); |wH5sjT
} ,*7 (%k^`
private static String[] name={ :lf+W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rA%usaW
}; -o$QS,
'}B+r@YCN
private static Sort[] impl=new Sort[]{ Q9Kve3u-i
new InsertSort(), v(ZYS']d2
new BubbleSort(), tjdaaN#,V
new SelectionSort(), L?WFmn
new ShellSort(), gG*X^Uo
new QuickSort(), ZWc]$H?
new ImprovedQuickSort(), ykV 5
new MergeSort(), 05b_)&4R
new ImprovedMergeSort(), A v2 08}Y
new HeapSort() "1L$|
}; G(p`1~xm
Wu[&Wv~
public static String toString(int algorithm){ { g/0x,-Z
return name[algorithm-1]; /v-6WSN
} }\\KYyjY
_'{_gei_P
public static void sort(int[] data, int algorithm) { amOnqH-(
impl[algorithm-1].sort(data); :,'wVS8"]
} :6vm+5!
KH(%?
public static interface Sort { 2jR r,Nl
public void sort(int[] data); /OLFcxEWh
} cx&>#8s&
}o(zj=7
public static void swap(int[] data, int i, int j) { MvK !u
int temp = data; PIu1+k.r?
data = data[j]; %s|}Fz->
data[j] = temp; 5=v}W:^v.
} RS)tO0
} '98VYCL