[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; rt~d6|6
} suiS&$-E
int i1=l; (G4at2YLd
int i2=mid+1; O{G?;H$
for(int cur=l;cur<=r;cur++){ ju8q?Nyhs
if(i1==mid+1) ujq=F
data[cur]=temp[i2++]; 2E/"hQw
else if(i2>r) +LZLy9iKt
data[cur]=temp[i1++]; g:D>.lKd
else if(temp[i1] data[cur]=temp[i1++]; cr?Q[8%t1
else (X1e5j>Ru
data[cur]=temp[i2++]; #9}D4i.`}
} (%e.:W${
} }`QUHIF
Cc' 37~6~P
} i6tf2oqO7
M!A}NWF
改进后的归并排序: mPN@{.(j
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package org.rut.util.algorithm.support; &<5zqsNJ\a
)72+\C[*~r
import org.rut.util.algorithm.SortUtil; bv9i*]
?U5{Wa85D
/** { MSkHf=
* @author treeroot :W:K:lk
* @since 2006-2-2 B=yqW
* @version 1.0 fk[-mZ
*/ $@Rxrx_@M
public class ImprovedMergeSort implements SortUtil.Sort { m!4ndO;0vh
4 \K7xM!
private static final int THRESHOLD = 10; "Hb"F?Yb
3yY}04[9<
/* nntuLuW
* (non-Javadoc) BNl5!X^{
* ]Svt`0|}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z8~NZ;A
*/ :q7Wy&ow
public void sort(int[] data) { \H~T>j{N
int[] temp=new int[data.length]; t#/YN.@r
mergeSort(data,temp,0,data.length-1); VT%NO'0
} KB,j7 ~V
e*(!^Q1
private void mergeSort(int[] data, int[] temp, int l, int r) { WZejp}x
int i, j, k; fue(UMF~
int mid = (l + r) / 2; N/'b$m5= S
if (l == r) gQelD6c
return; i2A81>68<
if ((mid - l) >= THRESHOLD) u+e{Mim
mergeSort(data, temp, l, mid); He/8=$c%
else Mzw<{*:r
insertSort(data, l, mid - l + 1); C12Fl
if ((r - mid) > THRESHOLD) Oo8VeRZ
mergeSort(data, temp, mid + 1, r); V/LLaZTE
else 2K6qY)/_
insertSort(data, mid + 1, r - mid); ?.-wnz
mh{d8<Q2
for (i = l; i <= mid; i++) { |`,2ri*5A
temp = data; K5VWt)Z#
} nH'e?>x~e
for (j = 1; j <= r - mid; j++) { gHEu/8E
temp[r - j + 1] = data[j + mid]; FZ<gpIv!NS
} I-)+bV G
int a = temp[l]; \?ZB]*Fu
int b = temp[r]; EHIF>@TZ
for (i = l, j = r, k = l; k <= r; k++) { JCzeXNY
if (a < b) { ~i{(<.he
data[k] = temp[i++]; 1 ~*7f>
a = temp; JT7nG.9
} else { xY8$I6
data[k] = temp[j--]; z}9(x.I
b = temp[j]; \gGW8Q;
} z`}qkbvi
} |?xN\O^#}
} oj<gD
8)3*6+D
/** :zbQD8jv
* @param data rmm0/+jY
* @param l b<ZIWfs
* @param i #&k5d:
*/ J#(LlCs?@c
private void insertSort(int[] data, int start, int len) { 6=/F$|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nYSiS}?S.
} RnE4<Cy
} *W1dG#Np}
} @)M9IOR
} EU;9*W<
qkY:3Ozw
堆排序： `?@}>.
n\D&!y[]F
package org.rut.util.algorithm.support; )[IC?U:5I
1#2 I
import org.rut.util.algorithm.SortUtil; ?4&e;83_#y
S Lj!v&'
/** |F[+k e
* @author treeroot ]^7@}Ce_
* @since 2006-2-2 c_pr
* @version 1.0 69NeQ$](
*/ ]|ag
public class HeapSort implements SortUtil.Sort{ itP,\k7>d
#A/
/* (non-Javadoc) U_Ptqqt%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C2I_%nU Z1
*/ :\c ^*K(9
public void sort(int[] data) { ,^< R{{{-A
MaxHeap h=new MaxHeap(); ()?(I?II
h.init(data); FVbb2Y?R
for(int i=0;i h.remove(); *OsQ}onv
System.arraycopy(h.queue,1,data,0,data.length); ^ VyKd
} 1n8/r}q'H
@*XV`_!h
private static class MaxHeap{ RSRS wkC
ltSU fI
void init(int[] data){ V)k4:H
this.queue=new int[data.length+1]; '<)n8{3Q5w
for(int i=0;i queue[++size]=data; L`TLgH&?R
fixUp(size); l|[N42+
} }R2u@%n{
} JPHL#sKyz
T&bYa`f]
private int size=0; V=l0(03j~
EME|k{W
private int[] queue; n( yn<
,[KD,)3y
public int get() { 8dA~\a
return queue[1]; K5h
} <xm7qmqI
.~;\eW[
public void remove() { :3Ox~o
SortUtil.swap(queue,1,size--); ? OM!+O
fixDown(1); <'oQ \eB
} /{_:{G!Q0
file://fixdown cuITY^6
private void fixDown(int k) { tcI*a>
int j; Btn?N
while ((j = k << 1) <= size) { CAhXQ7w'Z
if (j < size %26amp;%26amp; queue[j] j++; 7JH6A'&
if (queue[k]>queue[j]) file://不用交换 </zEg3F\
break; <%eG:n,#
SortUtil.swap(queue,j,k); $6 f3F?y7
k = j; "KpGlY?^
} ;6$jf:2m
} %tGO?JMkd
private void fixUp(int k) { kTgEd]^&D
while (k > 1) { 2[W&s&
int j = k >> 1; S,UDezxg
if (queue[j]>queue[k]) oMa6(3T?E
break; d$!RZHo10V
SortUtil.swap(queue,j,k); Y:[u1~a
k = j; 7?_CcRe
} Y$_B1_
} PJH&
TC*g|d @b
} (\x]YMLH
wmLs/:~
} m{HS0l'
zrb}_
SortUtil： NBGH_6DROw
~9@UjQ^)F
package org.rut.util.algorithm; S,he6zS
rx|pOz,:
import org.rut.util.algorithm.support.BubbleSort; sPIn|d
import org.rut.util.algorithm.support.HeapSort; j\M?~=*w
import org.rut.util.algorithm.support.ImprovedMergeSort; =Xr.'(U
import org.rut.util.algorithm.support.ImprovedQuickSort; iXjM.G
import org.rut.util.algorithm.support.InsertSort; NzvXN1_%
import org.rut.util.algorithm.support.MergeSort; @q)d
import org.rut.util.algorithm.support.QuickSort; K$=zi}J W
import org.rut.util.algorithm.support.SelectionSort; 8":Q)9;%
import org.rut.util.algorithm.support.ShellSort; ~t~|"u"P
vFmZ<C' )
/** tCt#%7J;a
* @author treeroot X&H"51
* @since 2006-2-2 ?:0Jav
* @version 1.0 ECmW`#Otb)
*/ w7L)'9
public class SortUtil { 8}:nGK|kx
public final static int INSERT = 1; |[8Th4*n
public final static int BUBBLE = 2; Ny/MJ#Lq
public final static int SELECTION = 3; VIf.q)_k
public final static int SHELL = 4; dM@1l1h/
public final static int QUICK = 5; N;%6:I./
public final static int IMPROVED_QUICK = 6; -KbYOb
public final static int MERGE = 7; ns4,@C$
public final static int IMPROVED_MERGE = 8; Ow,b^|
public final static int HEAP = 9; T)_hpt.
#/37V2E
public static void sort(int[] data) { jebx40TA3
sort(data, IMPROVED_QUICK); |_U= z;Y
} Vxt+]5X
private static String[] name={ uB?ZcF}Tk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )V9bI(v
}; K*dCc}:`
G3v5KmT
private static Sort[] impl=new Sort[]{ 2X&qE}%k S
new InsertSort(), _@/8gPT*i
new BubbleSort(), a8Wwq?@
new SelectionSort(), yB6?`3A:
new ShellSort(), O#r%>;3*
new QuickSort(), sDV Q#}a
new ImprovedQuickSort(), Etm?'
new MergeSort(), PPsE${!
new ImprovedMergeSort(), C7AUsYM
new HeapSort() 9gZ$
}; kcxAd
[Vt\$
public static String toString(int algorithm){ *8XEYZa
return name[algorithm-1]; Y<8vw d
} >LuYHr
syK^<xa
public static void sort(int[] data, int algorithm) { Y <qm{e
impl[algorithm-1].sort(data); 3+bt~J0
} LOJAWR9$^U
?z u8)U
public static interface Sort { Y6d@h? ht
public void sort(int[] data); {VoHh_[5%
} Y nZiTe@
<0?W{3NqI
public static void swap(int[] data, int i, int j) { EJ@ ~/)<
int temp = data; g=o4Q< #^y
data = data[j]; hR|MEn6KC
data[j] = temp; L8 @1THY
} @\I#^X5lv
} 0SPk|kr