[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; Wr8}=\/
} KK4rVb:-
int i1=l; [Bj\h7G
int i2=mid+1; VRg y
for(int cur=l;cur<=r;cur++){ $<L@B|}F)
if(i1==mid+1) Gsy'':u
data[cur]=temp[i2++]; ^~s!*T)\
else if(i2>r) 6 kD.
data[cur]=temp[i1++]; NleMZ
else if(temp[i1] data[cur]=temp[i1++]; 9 $^b^It
else eL [.;_
data[cur]=temp[i2++]; {&J OO
} ITD&wg
} *P?Rucg
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} +y\o^w4sT
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改进后的归并排序: W)L*zVj~
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package org.rut.util.algorithm.support; -4obX
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import org.rut.util.algorithm.SortUtil; k|$?b7)"@
<:!:7
/** PmtXD6p3(
* @author treeroot Lc(eY{CY
* @since 2006-2-2 yoM^6o^,D
* @version 1.0 M3eFG@,
*/ T-x}o
public class ImprovedMergeSort implements SortUtil.Sort { Kp19dp}'b
3il$V78|
private static final int THRESHOLD = 10; FJFO0Hb6
&,* ILz
/* H!|g?"C
* (non-Javadoc) Z7k ku:9
* rx@2Dmt6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4jzjrG
*/ ei~f1$zc#h
public void sort(int[] data) { BW ux!
int[] temp=new int[data.length]; BCX2C
mergeSort(data,temp,0,data.length-1); Nnfq!%
} $y%IM`/w
GE=PaYz
private void mergeSort(int[] data, int[] temp, int l, int r) { GtKSA#oYZB
int i, j, k; D$VRE^k
int mid = (l + r) / 2; wM}AWmH
if (l == r) Kd*=-
return; lBudC
if ((mid - l) >= THRESHOLD) z6|kEc"{
mergeSort(data, temp, l, mid); YUTI)&y
else +K,T^<F;
insertSort(data, l, mid - l + 1); 7tne/Yz
if ((r - mid) > THRESHOLD) szD9z{9"y
mergeSort(data, temp, mid + 1, r); #X0Xc2}{f
else _/YM@%d
insertSort(data, mid + 1, r - mid); xl9S=^`=
tjQ6[`
for (i = l; i <= mid; i++) { dV /Es
temp = data; .UvDew/Y
} >u]9(o7I
for (j = 1; j <= r - mid; j++) { ((M>To_l
temp[r - j + 1] = data[j + mid]; fh`}~ aQ
} z G`|)
int a = temp[l]; h)s&Nqg1B
int b = temp[r]; w%(D4ldp
for (i = l, j = r, k = l; k <= r; k++) { k7]4TIUD*
if (a < b) { 7/iN`3Bz
data[k] = temp[i++]; Yy,XKIqU
a = temp; # hw;aQ
} else { (Dn1Eov
data[k] = temp[j--]; h<qi[d4X
b = temp[j]; kV4L4yE
} +}eK8>2
} OyG2Ks"H
} )|W6Z
uH#X:Vne
/** <v?2p{U%
* @param data y2R\SL,
* @param l H|/"'t OZ
* @param i VO /b&%
*/ +wZ|g6vMct
private void insertSort(int[] data, int start, int len) { =&~ K;=:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n*caP9B
} @9l$jZ~x
} 2nCHL'8N
} w|4CBll
} 4}Lui9
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堆排序： xmtD0U1
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package org.rut.util.algorithm.support; ! 6R|
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import org.rut.util.algorithm.SortUtil; /JIVp_-p
Nw%^Gs<~
/** @\+UTkl8
* @author treeroot tg<bVA)E'J
* @since 2006-2-2 \\C!{}+
* @version 1.0 U*XdFH}vV
*/ ($gmN 4
public class HeapSort implements SortUtil.Sort{ AdbTI#eY
SJE!14|e
/* (non-Javadoc) L@J$kqWY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UJjtDV3@_g
*/ JURg=r]LI
public void sort(int[] data) { }N:QB}7'_
MaxHeap h=new MaxHeap(); y,`q6(&
h.init(data); #c9MVQ_
for(int i=0;i h.remove(); b#n
System.arraycopy(h.queue,1,data,0,data.length); U !%IC7@
} Nh !U
Ex6Kxd}8
private static class MaxHeap{ R<^E?FI
9fCU+s
void init(int[] data){ q(BRJ(
this.queue=new int[data.length+1]; ;Mr Q1
for(int i=0;i queue[++size]=data; \"$q=%vD
fixUp(size); 3h6,x0AG
} Equ%6x
} aM:tg1g
e}s,WC2-
private int size=0; -CALUX
F*Ul#yX
private int[] queue; C;ME"4,(
|w-s{L3@+
public int get() { rEWuWv$
return queue[1]; "$q"Kilj%
} 2#8PM-3"
T0cm+|S
public void remove() { D\E"v,Y\+O
SortUtil.swap(queue,1,size--); n.,ZgLx["
fixDown(1); .tsXQf
} ~`5[Li:eP
file://fixdown Psm9hP :m
private void fixDown(int k) { |T-Ytuy8
int j; }S%}%1pG7
while ((j = k << 1) <= size) { m"o=R\C
if (j < size %26amp;%26amp; queue[j] j++; Mb97S]878I
if (queue[k]>queue[j]) file://不用交换 Ifq|MZ\
break; ~se ;L
SortUtil.swap(queue,j,k); mA#^Pv*
k = j; Djf~8q V!
} "V,dH%&j
} @JOsG-VW~
private void fixUp(int k) { gL1r"&^L
while (k > 1) { ObataUxQT
int j = k >> 1; @?</8;%3W
if (queue[j]>queue[k]) 2]r5e;
break; S)"vyGv
SortUtil.swap(queue,j,k); i,L"%q)C
k = j; L l,nt
} la_
} L>N)[;|
R5 EC/@
} /q!_f!<q4x
EPM(hxCIQ
} V3axwg_
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SortUtil： fLgHQ
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package org.rut.util.algorithm; dhuIVBp!!e
uuy0fQQ8ti
import org.rut.util.algorithm.support.BubbleSort; - @KT#
import org.rut.util.algorithm.support.HeapSort; j92+kq>Xd
import org.rut.util.algorithm.support.ImprovedMergeSort; 3>^B%qg6
import org.rut.util.algorithm.support.ImprovedQuickSort; 7K!n'dAi6
import org.rut.util.algorithm.support.InsertSort; HBw0N?
import org.rut.util.algorithm.support.MergeSort; }~#qDrK
import org.rut.util.algorithm.support.QuickSort; s3~6[T?8
import org.rut.util.algorithm.support.SelectionSort; V_9\Ax'X
import org.rut.util.algorithm.support.ShellSort; @VsK7Eo
RC!T1o~L
/** 6X$\:>
* @author treeroot XLm@, A[
* @since 2006-2-2 " j:15m5
* @version 1.0 5jTA6s9zA
*/ [U7r>&
public class SortUtil { DyQvk
public final static int INSERT = 1; 1z3I^gI*i
public final static int BUBBLE = 2; l_(4CimOZ
public final static int SELECTION = 3; ],wzZhA
public final static int SHELL = 4; O^R^Aw
public final static int QUICK = 5; 8)J,jh9q
public final static int IMPROVED_QUICK = 6; "||G`%aO+t
public final static int MERGE = 7; Z3iX^
public final static int IMPROVED_MERGE = 8; RP wP4Z
public final static int HEAP = 9; X<H+Z2d
~>}7+p ?;
public static void sort(int[] data) { Ll^9,G"Tt
sort(data, IMPROVED_QUICK); <a2Kc '
} PU\@^)$
private static String[] name={ 1$"wN z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O[^zQA
}; MO79FNH2\
%5<t3H"
private static Sort[] impl=new Sort[]{ jF5oc
new InsertSort(), L/O:V^1
new BubbleSort(), 1:"ZS ]i
new SelectionSort(), TJb&f<
new ShellSort(), AOCiIPw
new QuickSort(), dr4m}v.
new ImprovedQuickSort(), E+eC #!&w
new MergeSort(), 2V*<J:;wb
new ImprovedMergeSort(), l3kBt-m
new HeapSort() l`{JxVg
}; Oin:5K)4-
r}t%DH
public static String toString(int algorithm){ uTP4r
return name[algorithm-1]; YFW0
} %W$?*Tm
?^: xNRE$j
public static void sort(int[] data, int algorithm) { 1;+(HB
impl[algorithm-1].sort(data); q5~fU$ ,
} 1)M%]I4
]&L[]
public static interface Sort { Lmyw[s\U
public void sort(int[] data); 1 BVpv7@
} ;#?+i`9'q
f@IL2DL}\
public static void swap(int[] data, int i, int j) { GSg/I.)S
int temp = data; N~M-|^L
data = data[j]; VW9BQs2w
data[j] = temp; LtBm }0
} f.u[!T
} K7d]p0d'