[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; >&U,co$>
} RG4sQ0
int i1=l; /7YF mI/0
int i2=mid+1; 9cj9SB4
for(int cur=l;cur<=r;cur++){ LA)[ip4
if(i1==mid+1) %?Ev|:i`@
data[cur]=temp[i2++]; qQH]`#P
else if(i2>r) @qHNE,K
data[cur]=temp[i1++]; 6!(@@^7{*
else if(temp[i1] data[cur]=temp[i1++]; ~b2wBs)r
else ,zTy?OQ
data[cur]=temp[i2++]; nxl[d\ap+n
} VZl6t;cn
} +) m_o"hl
.?hP7;hhI
} 1&U>,;]*
cx0*X*
改进后的归并排序: BGu?<bET
a 7,C>%I
package org.rut.util.algorithm.support; j ku}QM^
g"> {9YE
import org.rut.util.algorithm.SortUtil; # m *J&
Kc^;vT>3
/** LoGVwRmoC
* @author treeroot +PuPO9jKO@
* @since 2006-2-2 #&7}-"Nd
* @version 1.0 2m2;t0
*/ TG5XSy
public class ImprovedMergeSort implements SortUtil.Sort { P->y_4O
]:~OG@(
private static final int THRESHOLD = 10; J":,Vd!*-
,kn">k9
/* 'u1?tQ=gmk
* (non-Javadoc) 6efnxxY}sa
* X7g1:L1Ys
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G"XVn~]
*/ v7`HQvQEz=
public void sort(int[] data) { d8x\
int[] temp=new int[data.length]; ]]wA[c~G
mergeSort(data,temp,0,data.length-1); I=NZokfS
} xcf%KXJf6
oGRhnP'PF+
private void mergeSort(int[] data, int[] temp, int l, int r) { ,5*eX
int i, j, k; %$Aqle[
int mid = (l + r) / 2; $"H{4x`-
if (l == r) E0?iXSJ
return; ])!o5`ltZ
if ((mid - l) >= THRESHOLD) ut I"\1hQ
mergeSort(data, temp, l, mid); Aj4T"^fv
else UTH_^HAN#G
insertSort(data, l, mid - l + 1); Sh8"F@P8
if ((r - mid) > THRESHOLD) " _ka<R..
mergeSort(data, temp, mid + 1, r); ;hjwD
else CtSl
insertSort(data, mid + 1, r - mid); e;[F\ov%
Pw61_ZZ4B\
for (i = l; i <= mid; i++) { @>U-t{W
temp = data; KSNPkd6
} N D2L_!g:(
for (j = 1; j <= r - mid; j++) { H?X|(r|+
temp[r - j + 1] = data[j + mid]; <>aw 1WM+
} Q{lpKe0
int a = temp[l]; OUNd@o
int b = temp[r]; ^cz(}N 6&
for (i = l, j = r, k = l; k <= r; k++) { t>$kWd{9e;
if (a < b) { [a wjio
data[k] = temp[i++]; %eO0wa$a
a = temp; ]3l9:|
} else { k>g_Z`%<
data[k] = temp[j--]; !GNBDRr
b = temp[j]; EG=Sl~~o
} H,u<|UMM_
} |VNnOM
} nPy$D-L,
_<OSqE
/** vG"=h%
* @param data uD@#
* @param l lH6OcD:kj
* @param i +P`*kj-P\
*/ e8#h3lxJ`
private void insertSort(int[] data, int start, int len) { Yd~X77cv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F ;2w1S^
} cj'}4(
} ]n~ilS.rkl
} ~"kb7Fxp
} Ot6aRk
:1bWVM)
堆排序： aD$v2)RR
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package org.rut.util.algorithm.support; q;][5
:dQ B R
import org.rut.util.algorithm.SortUtil; /Y7<5!cS
PU^l.
/** n74V|b6W
* @author treeroot ='Y!+
* @since 2006-2-2 zp%Cr.)$
* @version 1.0 TO?R({yx*
*/ "$N+"3I
public class HeapSort implements SortUtil.Sort{ Gf<'WQ[
Pf\D-1gi
/* (non-Javadoc) m4l& eEp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WL?\5?G9l
*/ rcC<Zat,|
public void sort(int[] data) { 2vWx)Drb6
MaxHeap h=new MaxHeap(); .Lsavpo
h.init(data); }%_ b$
for(int i=0;i h.remove(); \}"$ ?d'f
System.arraycopy(h.queue,1,data,0,data.length); 9|gr0&#~j
} 2h1vVF3
LH8 fBhw
private static class MaxHeap{ 'DL`Ee\
t? yz
void init(int[] data){ hUp.tK:X7o
this.queue=new int[data.length+1]; !FElW`F
for(int i=0;i queue[++size]=data; [k;\SXDZo
fixUp(size); w"cZHm
} IV\'e}
} %~2YE
g|vNhq0|i
private int size=0; zU gE~
|6K+E6H
private int[] queue; #\ X#w<\?
rp!oO>F
public int get() { 4hTMbS_;
return queue[1]; C,ARXW1
} \1fN0e
\b?" b
public void remove() { vnM@QfN
SortUtil.swap(queue,1,size--); rPLm5ni
fixDown(1); rLI8pA|.
} opy("qH
file://fixdown yl7&5)b#9
private void fixDown(int k) { IJ(
int j; 8{^WY7.'
while ((j = k << 1) <= size) { %)/P^9I6
if (j < size %26amp;%26amp; queue[j] j++; ;kS&A(
if (queue[k]>queue[j]) file://不用交换 XH}\15X
break; |ZRagn30
SortUtil.swap(queue,j,k); 3W3ZjdV+
k = j; ?"i}^B`*
} ]v]qChZHd
} jU9$Ehg I
private void fixUp(int k) { 34%RZG_o'
while (k > 1) { odjT:Vr
int j = k >> 1; ;7E7!t^
if (queue[j]>queue[k]) CsoiyY -2
break; FrL]^59a
SortUtil.swap(queue,j,k); FtfKe"qw
k = j; -xEXN[\S
} %t" CX5n
} 7!EBH(,z
Vr^n1sgE}r
} 4{rZppm
S||}nJ0
} --%N8L;e
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SortUtil： M42Ssn)
U |Jo{(Y
package org.rut.util.algorithm; ZjQ |Wx
s'E2P[:
import org.rut.util.algorithm.support.BubbleSort; 1DE<rKI
import org.rut.util.algorithm.support.HeapSort; lyy W
import org.rut.util.algorithm.support.ImprovedMergeSort; QgU8s'e
import org.rut.util.algorithm.support.ImprovedQuickSort; \eT5flC
import org.rut.util.algorithm.support.InsertSort; bzuEfFaL
import org.rut.util.algorithm.support.MergeSort; r^3acXl
import org.rut.util.algorithm.support.QuickSort; -EkWs/'h
import org.rut.util.algorithm.support.SelectionSort; 'B 43_
import org.rut.util.algorithm.support.ShellSort; GVYBa_gx
z$/_I0[
/** ;*:]*|bw
* @author treeroot f78An 8
* @since 2006-2-2 c#Sa]n
* @version 1.0 Lvq>v0|
*/ +;N2p1ZBf
public class SortUtil { VEqS;~[
public final static int INSERT = 1; bF"G[pD
public final static int BUBBLE = 2; %,6#2X nX%
public final static int SELECTION = 3; Sa?ksD2IaB
public final static int SHELL = 4; g*e
public final static int QUICK = 5; 7hlO#PYZ
public final static int IMPROVED_QUICK = 6; Jq&uF*!
public final static int MERGE = 7; i|w81p^o
public final static int IMPROVED_MERGE = 8; 9F)z4
public final static int HEAP = 9; J'SZ
4'g;TI^
public static void sort(int[] data) { wVicyiY]
sort(data, IMPROVED_QUICK); ;t<QTGJ
} z(_Ss@ $
private static String[] name={ 2jg-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P@$/P99
}; G7qG$wd8h
Xm%D><CC8"
private static Sort[] impl=new Sort[]{ C&*oI=6
new InsertSort(), VY;{/.Sa
new BubbleSort(), pQ=>.JU
new SelectionSort(), Y;@>b{s
new ShellSort(), 1zm ulj%&
new QuickSort(), Z~oo;xE
new ImprovedQuickSort(), 5iz{op<$,
new MergeSort(), 5!DBmAB
new ImprovedMergeSort(), wQP^WzNE
new HeapSort() >/kcdWl
}; uxtWybv
7n8~K3~;
public static String toString(int algorithm){ _=Z,E.EN
return name[algorithm-1]; Xjo5v*Pu
} Rzbj
s>;v!^N?u
public static void sort(int[] data, int algorithm) { 4zev^FR
impl[algorithm-1].sort(data); bJRN;g
} 66/3|83Z
8+a4>8[M
public static interface Sort { s \;"X
public void sort(int[] data); \`oT#|0
} 0B@SN)<kH
/y _O4
public static void swap(int[] data, int i, int j) { %{AO+u2i
int temp = data; 01r 8$+
data = data[j]; 8$85^Of
data[j] = temp; zVXC1u9B
} Ir`eL
} /<@SFF.