[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; O3?3XB> <
} hU:M]O0uw
int i1=l; RjII(4Et
int i2=mid+1; j2UiZLuV
for(int cur=l;cur<=r;cur++){ bVB_KE
if(i1==mid+1) y5td o'Ex
data[cur]=temp[i2++]; sd@JQ%O
else if(i2>r) 2WP73:'t
data[cur]=temp[i1++]; i.|zKjF'
else if(temp[i1] data[cur]=temp[i1++]; '^TQ Ubw
else y?ps+ce93
data[cur]=temp[i2++]; OZ/P@`kN.f
} {Z529Ns
} :GXD-6}^|
\m>mE/N
} QbF!V%+a's
h83;}>
改进后的归并排序: 'u\my
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package org.rut.util.algorithm.support; h:[8$]
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import org.rut.util.algorithm.SortUtil; -P+@n)?T6
CaSoR |
/** Ya#,\;dTT
* @author treeroot b'D|p/)m0S
* @since 2006-2-2 &a'H vQV
* @version 1.0 (&25 8i,
*/ {^r8uKo:~
public class ImprovedMergeSort implements SortUtil.Sort { q8j W&_
1;; is
private static final int THRESHOLD = 10; #~&SkIhBE
$.a4Og2
/* W[5a'}OV
* (non-Javadoc) >i`V-"x
* F"3LG"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D{Zjo)&tF'
*/ {,Y?+F
public void sort(int[] data) { 2:31J4t-<
int[] temp=new int[data.length]; ]kJinXHW
mergeSort(data,temp,0,data.length-1); sH//*y
} B74L/h
Z!@<[Vo6
private void mergeSort(int[] data, int[] temp, int l, int r) { WUVRwJ 5
int i, j, k; 5h"moh9tG
int mid = (l + r) / 2; ZyJdz+L{@V
if (l == r) kRCuc}:SB
return; 8Z=d+}Gg<
if ((mid - l) >= THRESHOLD) //SH=>w2
mergeSort(data, temp, l, mid); x@-bY
else eXHk6[%[
insertSort(data, l, mid - l + 1); +=XDNSw
if ((r - mid) > THRESHOLD) (J c} K
mergeSort(data, temp, mid + 1, r); ZT UaF4k j
else MwoU>+XB
insertSort(data, mid + 1, r - mid); 9?VyF'r=
]Iku(<*Ya
for (i = l; i <= mid; i++) { 9#:b+Amzz
temp = data; mN>7vJ
} eR'Df"+
for (j = 1; j <= r - mid; j++) { nUAoPE
temp[r - j + 1] = data[j + mid]; $=7'Cm?
} 4LO U[D
int a = temp[l]; 5t`:=@u
int b = temp[r]; Pj4WWKX
for (i = l, j = r, k = l; k <= r; k++) { -&PiD
if (a < b) { *z2G(Uac
data[k] = temp[i++]; bCM&Fe0GM
a = temp; 8hx4s(1!
} else { 0!WF,)/T7i
data[k] = temp[j--]; h$#QRH
b = temp[j]; K`=O!;
} VDCG 5QP6(
} '=|2, H]
} =B}a +0u!
W`baD!*
/** _JlbVe[<
* @param data +*dG'U6
* @param l MXSN <
* @param i }gk37_}X\I
*/ l8I`%bu
private void insertSort(int[] data, int start, int len) { gW{<:6}!*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'cs!(z-{x
} KO`ftz3 +
} k7rFbrLZ
} % D]vKv~<
} _l?InNv
(!-gX"<b
堆排序： KeU|E<|!
9H@I<`qGC
package org.rut.util.algorithm.support; R3nCk-Dq
^/|agQ7D2
import org.rut.util.algorithm.SortUtil; P8tpbdZE-
l+6y$2QR
/** }T@^wY_Ow
* @author treeroot hdL/zW7]
* @since 2006-2-2 Ls8@@b,t2
* @version 1.0 R,mOV8y"W[
*/ Fai_v{&?
public class HeapSort implements SortUtil.Sort{ k lLhi<*
#;9I3,@/Y
/* (non-Javadoc) ?2hS<qXX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ekb9=/
*/ ~H[
public void sort(int[] data) { _ZM$&6EC
MaxHeap h=new MaxHeap(); .Dn.|A
h.init(data); pmm?Fq!s=
for(int i=0;i h.remove(); U} EaV<
System.arraycopy(h.queue,1,data,0,data.length); hlY]s &0
} Lu.D,oP
q^:>sfd
private static class MaxHeap{ <Fkm7ME]
x-wIgo+
void init(int[] data){ pGQP9r%
this.queue=new int[data.length+1]; MAhJ>qe8 p
for(int i=0;i queue[++size]=data; k[TVu5R
fixUp(size); mAycfa
} j]-0m4QF
} 3j'A.S
3[R<JrO
private int size=0; VrV )qfG
81m3j`b
private int[] queue; /RVy?)hVT#
\rXmWzl{
public int get() { gN2$;hb?
return queue[1]; @J`o pR
} (IlHg^"
.YV{wL@cB
public void remove() { *&WkorByW
SortUtil.swap(queue,1,size--); #BB,6E
fixDown(1); ^?pf.E!F`
} ;[-OMGr]#
file://fixdown <evvNSE
private void fixDown(int k) { {WBe(dc_%
int j; #6t 4 vJ1
while ((j = k << 1) <= size) { "r!>p\.0O
if (j < size %26amp;%26amp; queue[j] j++; IM.sW'E
if (queue[k]>queue[j]) file://不用交换 nkI+"$Rz0
break; _n6ge*,E
SortUtil.swap(queue,j,k); ZXCq>
k = j; }tq
} C5}c?=#bdf
} 6`KR
private void fixUp(int k) { ,2t|(V*"&
while (k > 1) { $8/=@E{51
int j = k >> 1; baLO~C
if (queue[j]>queue[k]) L<t>o":o
break; #[ei/p
SortUtil.swap(queue,j,k); fL0dy[Ch@
k = j; $Hw w
} D-{;;<nIr`
} 'eyzH[l,(
lk.]!K$}
} %7w=;]ym
w=NM==cLj
} " ^v/Y
noSkKqP
SortUtil： _&(\>{pm
ldd8'2
package org.rut.util.algorithm; -cgLEl1J
#7 )&`
import org.rut.util.algorithm.support.BubbleSort; 6MCLm.L
import org.rut.util.algorithm.support.HeapSort; /{)}y
import org.rut.util.algorithm.support.ImprovedMergeSort; C bWz;$r
import org.rut.util.algorithm.support.ImprovedQuickSort; UB5CvM28
import org.rut.util.algorithm.support.InsertSort; NCrNlHIF
import org.rut.util.algorithm.support.MergeSort; Cz1Q@<)
import org.rut.util.algorithm.support.QuickSort; / @v V^!#1
import org.rut.util.algorithm.support.SelectionSort; 4>x$I9^Y!
import org.rut.util.algorithm.support.ShellSort; /"(`oe<
z3n273W>6
/** hgYi ,e
* @author treeroot JfOBZQ
* @since 2006-2-2 a&^HvXO(>(
* @version 1.0 ro&/
*/ Vy.gr4Cm
public class SortUtil { EZ,Tc;f=
public final static int INSERT = 1; 'CQ~ZV5
public final static int BUBBLE = 2; iXoEdt)
public final static int SELECTION = 3; yH=Hrz:<eM
public final static int SHELL = 4; 1K*`i(
public final static int QUICK = 5; :EGvI
public final static int IMPROVED_QUICK = 6; gGaA;YW1
public final static int MERGE = 7; 8v<802
public final static int IMPROVED_MERGE = 8; )WBp.j /#
public final static int HEAP = 9; c)*,">$#
{[|je]3v
public static void sort(int[] data) { g~7x+cu0
sort(data, IMPROVED_QUICK); Arr(rM
} VyMFALSe]h
private static String[] name={ ?l><?i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Vn=K5nm
}; ?[Sac]h ys
Cs!z3QU
private static Sort[] impl=new Sort[]{ w"Q/ 6#!K
new InsertSort(), 1"\^@qRv#
new BubbleSort(), !:]/MpQ ?
new SelectionSort(), {4F=].!
new ShellSort(), QZh#&Qf;
new QuickSort(), e2"<3
new ImprovedQuickSort(), z|M+ FHl$
new MergeSort(), C vOH*K'
new ImprovedMergeSort(), @u>:(9bp
new HeapSort() U/#X,Bi~
}; ;aj4V<@
.OM^@V~T
public static String toString(int algorithm){ op2<~v0?
return name[algorithm-1]; >;K!yI?0
} "Wb>y*S
QmKEl|/{u
public static void sort(int[] data, int algorithm) { nk*T x
impl[algorithm-1].sort(data); kEYkd@{
} LJgGX,Kp
v:IpZ;^
public static interface Sort { iW?z2%#
public void sort(int[] data); qg06*$%
} ip+?k<]z
Leu93f2
public static void swap(int[] data, int i, int j) { &cpqn2Z
int temp = data; -=InGm\Y
data = data[j]; <WiyM[ep
data[j] = temp; oypF0?!m
} NZu2D
} Z~3