[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; {wySH[V
} cyyFIJj]
int i1=l; [E1I?hfJ
int i2=mid+1; g^FH[(P[G
for(int cur=l;cur<=r;cur++){ va<pHSX&I@
if(i1==mid+1) rD gl@B3
data[cur]=temp[i2++]; l"CONzm!
else if(i2>r) g>f394j
data[cur]=temp[i1++]; $-73}[UA 4
else if(temp[i1] data[cur]=temp[i1++]; ;p8xL)mUP
else .rHO7c,P~
data[cur]=temp[i2++]; x`&W[AA4
} >E3OYa?G
} *6DKUCA/
VXp X#O
} Vv]mME@
mDUS9>
改进后的归并排序: yFjSvm6
r>\.b{wI
package org.rut.util.algorithm.support; d|3[MnU[a
F2=97=R
import org.rut.util.algorithm.SortUtil; vr$[
'"Gi&:*nQ<
/** ko$R%W&T
* @author treeroot sXA=KD8
* @since 2006-2-2 /DCUwg=0
* @version 1.0 T=vI'"w
*/ NG ~sE&,7
public class ImprovedMergeSort implements SortUtil.Sort { XOMWqQr|
*RhdoD|a
private static final int THRESHOLD = 10; .E(Ucnz/
q=U=Y n
/* fqxMTTg@
* (non-Javadoc) Yhfk{CI
* XQ>m8K?\d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) utv.uwfat
*/ %?ad.F+7
public void sort(int[] data) { -VL3em|0
int[] temp=new int[data.length]; gueCP+a_
mergeSort(data,temp,0,data.length-1); 8}2 `^<U
} * -)aGL
u56cT/J1
private void mergeSort(int[] data, int[] temp, int l, int r) { c{[WOrA~#
int i, j, k; H`sV\'`!}
int mid = (l + r) / 2; H|]Q;,C
if (l == r) >K3Lww)Ln
return; ?]S*=6
if ((mid - l) >= THRESHOLD) 'tekne
mergeSort(data, temp, l, mid); V0>,Kxk
else > ewcD{bt
insertSort(data, l, mid - l + 1); ? T9-FGW
if ((r - mid) > THRESHOLD) p)`JVq,H/B
mergeSort(data, temp, mid + 1, r); @xo9'M<l
else <?+\\Z!7
insertSort(data, mid + 1, r - mid); Ad(j&P
idHBz*3~ps
for (i = l; i <= mid; i++) { YRFM1?*
temp = data; r?{tBju^
} 6B=J*8 Hs
for (j = 1; j <= r - mid; j++) { sHNt>5p
temp[r - j + 1] = data[j + mid]; 9"[#\TW9Vb
} hq|/XBd||
int a = temp[l]; I?gbu@o
int b = temp[r]; 09r.0Ks
for (i = l, j = r, k = l; k <= r; k++) { lq74Fz&(
if (a < b) { ^c*'O0y[D
data[k] = temp[i++]; s&4Y+dk93
a = temp; CAk.2C/
} else { +NQw^!0qy
data[k] = temp[j--]; B--`=@IRf"
b = temp[j]; 3LG)s:p$/
} se&:Y&vrc~
} B|tP3<
} cOcm9m#
5=eGiF;0\
/** Q/':<QY
* @param data 7+fFKZFKF
* @param l i9Qx{f88
* @param i W1 E((2
*/ AyddkjX
private void insertSort(int[] data, int start, int len) { ,Ao8QN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E8/P D
} 7C=t19&R'
} (sY?"(~j?T
} 1r$q $\
} W<t,Ivg
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堆排序： YkTEAI|i
UhNeY{6
package org.rut.util.algorithm.support; f -bVcWI
Xcb\N
import org.rut.util.algorithm.SortUtil; {C [7V{4(%
[!"u&iu`
/** fU,sn5zZ
* @author treeroot l78zS'
* @since 2006-2-2 vNP,c]:%
* @version 1.0 DEIn:d
*/ EI'(
public class HeapSort implements SortUtil.Sort{ N/(&&\3
OX!9T.j
/* (non-Javadoc) QM OOJA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n(&6E3ZcI
*/ ;sDFTKf
public void sort(int[] data) { Pl U!-7
MaxHeap h=new MaxHeap(); {A{=RPL
h.init(data); P'[w9'B
for(int i=0;i h.remove(); u>}k+8~
System.arraycopy(h.queue,1,data,0,data.length); ^8DC W`V
} qjuX16o
H'GyWG|Wx
private static class MaxHeap{ {/N4/gu
tT'+3
void init(int[] data){ aB.`'d)V
this.queue=new int[data.length+1]; 7cH[}v`pn
for(int i=0;i queue[++size]=data; %c):^;6p
fixUp(size); ]*?qaIdqu
} |:C=j/f
} $5l8V
VUk2pEGO.
private int size=0; VB\oK\F5z
al1Uf]xh
private int[] queue; 5F$W^N
smJ%^'x
public int get() { Ga"t4[=I
return queue[1]; - 3kg,=HU;
} 4Y[tx]<
!h4L_D0
public void remove() { mJl|dk_c
SortUtil.swap(queue,1,size--); 1-4W4"#
fixDown(1); 5P [b/.n
} O.Z<dy+
file://fixdown l:%4@t`
private void fixDown(int k) { 4$C:r&K
int j; __OD^?qa
while ((j = k << 1) <= size) { WOiw 0
if (j < size %26amp;%26amp; queue[j] j++; 1jpcoJ@s
if (queue[k]>queue[j]) file://不用交换 5#~u U
break; vzG(u_,9[
SortUtil.swap(queue,j,k); ^<Q+=\h
k = j; 6p])2]N>p
} VU9w2/cM
} v[\' M
private void fixUp(int k) { wS9EC}s:Q
while (k > 1) { b$[O^p9x
int j = k >> 1; BNL Q]
if (queue[j]>queue[k]) {fmSmD
break; ]25 xX
SortUtil.swap(queue,j,k); <J!#k@LY]7
k = j; "CX&2Xfe
} '(4$h3-gv7
} jNBvy1
EA8K*>'pv
} ;b-Y$<
^^1rjh1I
} QE1DTU
#**vIwX-Q
SortUtil： 3!ZndWSHV
A@^Y2:pY
package org.rut.util.algorithm; d#'aTmu!
-AWL :<
import org.rut.util.algorithm.support.BubbleSort; i{vM NI{
import org.rut.util.algorithm.support.HeapSort; eTw sh]
import org.rut.util.algorithm.support.ImprovedMergeSort; v47Y7s:uQ
import org.rut.util.algorithm.support.ImprovedQuickSort; B_$hi=?TTd
import org.rut.util.algorithm.support.InsertSort; &z8I@^<
import org.rut.util.algorithm.support.MergeSort; W6:ei.d+NS
import org.rut.util.algorithm.support.QuickSort; E|P
import org.rut.util.algorithm.support.SelectionSort; !lpKZG
import org.rut.util.algorithm.support.ShellSort; !36jtKdM
#-r,;
/** 74i
* @author treeroot }}y~\TB~}
* @since 2006-2-2 ~`~mnlN
* @version 1.0 z)*7LI
*/ >VIb|YA
public class SortUtil { XR3=Y0YDf
public final static int INSERT = 1; R-5EztmLae
public final static int BUBBLE = 2; XpFW(v
public final static int SELECTION = 3; ;n0VF77>O
public final static int SHELL = 4; h2<Y*j
public final static int QUICK = 5; JL.noV3q$
public final static int IMPROVED_QUICK = 6; &]~Vft l
public final static int MERGE = 7; qn=~4rg]R
public final static int IMPROVED_MERGE = 8; I*hCIy#;
public final static int HEAP = 9; +X#JCLD
Kw_> X&GcJ
public static void sort(int[] data) { [Vzp D 4
sort(data, IMPROVED_QUICK); FtHR.S=u
} IY jt*p5
private static String[] name={ QU{|S.\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b5NPG N
}; >LS*G qjq
IWc?E
private static Sort[] impl=new Sort[]{ tj<a , l
new InsertSort(), 4AA3D!$
new BubbleSort(), KVQ|l,E, /
new SelectionSort(), XpS].P9
new ShellSort(), !} ~K'1"
new QuickSort(), [ed6n@/O@
new ImprovedQuickSort(), w%Vw*i6o
new MergeSort(), A"ApWJ3
new ImprovedMergeSort(), &b~if}vcb
new HeapSort() x"7`,W
}; {\u=m>2U|
D}YAu,<K
public static String toString(int algorithm){ d'y\~M9(
return name[algorithm-1]; KicPW}_
} 9b88):[qO
BTi:Bcv k
public static void sort(int[] data, int algorithm) { vOMmsU F
impl[algorithm-1].sort(data); Bg3`w__l;
} ,j^z];
<B"M} Y>_P
public static interface Sort { afE`GG-
public void sort(int[] data); n^kszIu~
} =\uQGH
wX7|a/|@
public static void swap(int[] data, int i, int j) { c:>&iB-Yu
int temp = data; ZoFQJJK56B
data = data[j]; xweV8k/
data[j] = temp; YI0ubB
} 3"9'MDKH
} GP|G[