[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; .Mw'P\GtM
} u|7d_3 ::
int i1=l; i=-zaboo
int i2=mid+1; 4XDR?KUM
for(int cur=l;cur<=r;cur++){ k|,pj^
if(i1==mid+1) 2@o_7w98
data[cur]=temp[i2++]; FG-w7a2mn
else if(i2>r) H>[1DH#b
data[cur]=temp[i1++]; QtQku1{
else if(temp[i1] data[cur]=temp[i1++]; +n]U3b
else 8| zR8L
data[cur]=temp[i2++]; ;5A&[]@^^@
} Zg|z\VR
} Z^>[{|lIA
,ORZtj
} &2{h]V6
U6"U^
改进后的归并排序: c@:r\]
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package org.rut.util.algorithm.support; mk1;22o{TX
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import org.rut.util.algorithm.SortUtil; UcDJ%vI
[K[tL|EK
/** ~<3qsA..
* @author treeroot 4em7PmT
* @since 2006-2-2 vfJ}t#%UH
* @version 1.0 8f% @
*/ =V1k'XJ
public class ImprovedMergeSort implements SortUtil.Sort { N7*JL2Rnq
]YZ+/:#U7
private static final int THRESHOLD = 10; -3X#$k8
=eSG7QfS
/* 7Rj!vj/
* (non-Javadoc) ,*r"cmz
* tq?lF$mM:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |^Z1 D TAw
*/ L*9^-,
public void sort(int[] data) { VY@uQ#&A
int[] temp=new int[data.length]; /g712\?M4
mergeSort(data,temp,0,data.length-1); rSB"0W7
} *J?QXsg
6z"fBF
private void mergeSort(int[] data, int[] temp, int l, int r) { $GUSTV
int i, j, k; l2=.;7IV
int mid = (l + r) / 2; 3~BL!e,
if (l == r) }#q9>gx
return; -[v:1\Vv
if ((mid - l) >= THRESHOLD) O1coay
mergeSort(data, temp, l, mid); "=H7p3
else #;a 1=8H
insertSort(data, l, mid - l + 1); UKQ,]VC
if ((r - mid) > THRESHOLD) Fg?Gx(g4
mergeSort(data, temp, mid + 1, r); qI<6% ^i
else ,v$gQU2
insertSort(data, mid + 1, r - mid); X}_}`wIn
(80]xLEBL
for (i = l; i <= mid; i++) { U n2xZ[4
temp = data; JTpKF_Za<
} B @UaaWh
for (j = 1; j <= r - mid; j++) { TvAA
temp[r - j + 1] = data[j + mid]; O$Wt\Y<q
} 4>{q("r,
int a = temp[l]; 6J6MR<5'
int b = temp[r]; ?)7uwJsH
for (i = l, j = r, k = l; k <= r; k++) { RP7e)?5$s
if (a < b) { /+P 4cHv]F
data[k] = temp[i++]; @h X
a = temp; vyERt^z
} else { d37l/I
data[k] = temp[j--]; pQ*9)C
b = temp[j]; U#+S9jWe
} E$34myOVf
} iquB]z'
} "a-Ex ]
7s,IT8ii
/** t'_Hp},
* @param data Z~~{!C+G
* @param l DL|,:2`
* @param i 9]VUQl9gh
*/ >z h
private void insertSort(int[] data, int start, int len) { ]o_Z3xXUa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;)5d wq
} hv}rA,Yd
} 23qTmh
} HW"|Hm$Y(
} )}=`Gx5+
cG,B;kMjo
堆排序： 1s=M3m&H
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package org.rut.util.algorithm.support; K&9|0xt
*ZKI02M
import org.rut.util.algorithm.SortUtil; WHqp7NPl
^T)HRT-k
/** 7tfMD(Q]e/
* @author treeroot ly}6zOC\
* @since 2006-2-2 ?2%d;tW
* @version 1.0 h5U@Ys
*/ fr;>`u[;
public class HeapSort implements SortUtil.Sort{ mgL~ $
R?(0:f
/* (non-Javadoc) (i1FMd}G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1@P/h#_Vr
*/ k)b}"' I
public void sort(int[] data) { c#$B;?
MaxHeap h=new MaxHeap(); 05LVfgJ'q
h.init(data); Cv>|>Ob#
for(int i=0;i h.remove(); %8>s:YG
System.arraycopy(h.queue,1,data,0,data.length); 4gb2$"!
} &kHp}\
Ji :2P*
private static class MaxHeap{ X~sl5?
=_\5h=`Yx
void init(int[] data){ 5CueD]
this.queue=new int[data.length+1]; yN5g]U.Q
for(int i=0;i queue[++size]=data; Y]P';C_eP
fixUp(size); wP/&k`HQ#i
} 'LpJ:Th
} tlV>
Q'~kWmLf
private int size=0; "2i{ L '
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private int[] queue; sczN0*w&C
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public int get() { hq6fDRO/4
return queue[1]; o=_:g >5
} T,@.RF
68Vn]mr#
public void remove() { }7RR",w
SortUtil.swap(queue,1,size--); =\B{)z7@6D
fixDown(1); 9 #TzW9
} D!h8NZ;El
file://fixdown B&Q\J>l9S
private void fixDown(int k) { !lKO|Y
int j; +J} wYind
while ((j = k << 1) <= size) { R5g-b2Lm
if (j < size %26amp;%26amp; queue[j] j++; y{,HpPp#o
if (queue[k]>queue[j]) file://不用交换 "fdgBso
break; A07g@3n
SortUtil.swap(queue,j,k); s:7^R-"
k = j; QzPq^
} 8;ke,x
} b4Br!PL@G
private void fixUp(int k) { \{t#V ~
while (k > 1) { a*$to/^r
int j = k >> 1; mvO!Y
if (queue[j]>queue[k]) }=z_3JfO
break; upg?
SortUtil.swap(queue,j,k); {E-.W"t4
k = j; "XT7;!
} ]|it&4l
} Tz4,lwuWX7
D*6v.`]X
} mcy\nAf5%
L3JFQc/oh~
} Yz=(zj
OXe+=Lp<
SortUtil： QG*=N {%5
'A;G[(SYy
package org.rut.util.algorithm; `uM:>
CnSfGsE>
import org.rut.util.algorithm.support.BubbleSort; 7Ab&C&3
import org.rut.util.algorithm.support.HeapSort; au@ LQxKQ
import org.rut.util.algorithm.support.ImprovedMergeSort; ,;)Y1q}Q
import org.rut.util.algorithm.support.ImprovedQuickSort; }l~|c{WH`
import org.rut.util.algorithm.support.InsertSort; L^i=RGx
import org.rut.util.algorithm.support.MergeSort; Nz_c]3_j
import org.rut.util.algorithm.support.QuickSort; M$~3`n*^
import org.rut.util.algorithm.support.SelectionSort; $m,gQV~4
import org.rut.util.algorithm.support.ShellSort; cjAKc|NJ
<`k\kZM
/** @wy|l)%
* @author treeroot P?p>'avP
* @since 2006-2-2 'bJ!~ML&
* @version 1.0 _*7h1[,{f
*/ rl4B(NZi}
public class SortUtil { 7zXFQ|TP
public final static int INSERT = 1; v#0F1a?]D
public final static int BUBBLE = 2; 8^\}\@
public final static int SELECTION = 3; :i_818h!?[
public final static int SHELL = 4; 4e~^G
public final static int QUICK = 5; u.sF/T=6f
public final static int IMPROVED_QUICK = 6; R*a5bKr
public final static int MERGE = 7; s:3 altv
public final static int IMPROVED_MERGE = 8; #"-?+F=rk
public final static int HEAP = 9; 5Ds/^fA
0D/u`-
public static void sort(int[] data) { (|)`~z
sort(data, IMPROVED_QUICK); 6zh<PETa03
} lffp\v{w
private static String[] name={ Hy^Em
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;*1bTdB5a
}; uPKq<hBI
<_$]!Z6UR
private static Sort[] impl=new Sort[]{ ?j;e/r.
new InsertSort(), XI:8_F;Q
new BubbleSort(), pd{W(M78g
new SelectionSort(), K]ob>wPf
new ShellSort(), nwswy]e8/
new QuickSort(), +^ a9i5
new ImprovedQuickSort(), =+5z;3
new MergeSort(), A]ZCQ49
new ImprovedMergeSort(), QA>(}u\+
new HeapSort() qzS 9ls>>
}; CF"$&+s9
59mNb:<
public static String toString(int algorithm){ K~ ,|~
return name[algorithm-1]; ZycV?ob8}
} s3qWTdM
nfpkWyIu{
public static void sort(int[] data, int algorithm) { `q|&;wP.
impl[algorithm-1].sort(data); mAMi-9
} **_`AM~
JLUG=x(dA
public static interface Sort { Py7!_TX
public void sort(int[] data); t\~lGG-p
} ddvSi6
pYZ6-s
public static void swap(int[] data, int i, int j) { QR4rQu
int temp = data; F}3<q
data = data[j]; aEU[k>&
data[j] = temp; ]@X5'r"
} #:C;VAAp
} ASmMj;>UM