[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; jb83Y>
} K3.z>.F'h
int i1=l; k@ So l6
int i2=mid+1; C-sFTf7
for(int cur=l;cur<=r;cur++){ ~oX`Gih
if(i1==mid+1) [R(dCq>
data[cur]=temp[i2++]; dh-?_|"
else if(i2>r) S[5OTwa8L
data[cur]=temp[i1++]; q5G`N>"V
else if(temp[i1] data[cur]=temp[i1++]; Y1-=H)G
else 3S=$ng
data[cur]=temp[i2++]; W!R7D%nX
} 's\rQ-TV
} %%+@s
@>q4hYF
} -_^#7]
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改进后的归并排序: ys- w0H
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package org.rut.util.algorithm.support; 9WT{~PGj
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import org.rut.util.algorithm.SortUtil; SNrX(V::z
2= )V"lR\
/** qoAJcr2uN
* @author treeroot U]PsL3:
* @since 2006-2-2 RH^;M-'
* @version 1.0 WiqkC#N
*/ -?L3"rxAP
public class ImprovedMergeSort implements SortUtil.Sort { 5 D[`nU}
q-r5zGI
private static final int THRESHOLD = 10; =6d'/D#J
/}Ct2w&<k
/* Q;k D Jo
* (non-Javadoc) @g]>D
* #SR )tU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l<UA0*t
*/ 4bq+(CI6
public void sort(int[] data) { bo &QKK
int[] temp=new int[data.length]; [H=l#W@
mergeSort(data,temp,0,data.length-1); TUX:[1~Nf[
} q22@ZRw
1Gw_S?$7
private void mergeSort(int[] data, int[] temp, int l, int r) { M!Ywjvw*)3
int i, j, k; bW2Msv/H
int mid = (l + r) / 2; :a*F>S!
if (l == r) LM*m>n*
return; F#Bi*YY
if ((mid - l) >= THRESHOLD) +a|u,'u
mergeSort(data, temp, l, mid); asL!@YE
else >a)6GZ@
insertSort(data, l, mid - l + 1); F>U*Wy
if ((r - mid) > THRESHOLD) %:.IG.`d
mergeSort(data, temp, mid + 1, r); q9B5>Ye)
else g>n1mK|
insertSort(data, mid + 1, r - mid); :1gcLsF
>K 7]G?+7E
for (i = l; i <= mid; i++) { , L5.KwB
temp = data; .#_g.0<
} oR}'I
for (j = 1; j <= r - mid; j++) { vFK!LeF%
temp[r - j + 1] = data[j + mid]; {W%/?d9m
} l<p6zD$l
int a = temp[l]; &t@|/~%[
int b = temp[r]; t<yOTVah
for (i = l, j = r, k = l; k <= r; k++) { 6Z!OD(/e
if (a < b) { rp!>rM] s
data[k] = temp[i++]; V&R_A~<T
a = temp; fvM|Jb
} else { 4~e6z(
data[k] = temp[j--]; gx=2]~O1(
b = temp[j]; NBO&VYs|
} eXCH*vZY
} f/pr
} K~14;
V3[>^ZCA
/** Jm3iYR+,
* @param data y2@8?
* @param l .xg, j{%(
* @param i {3G2-$yb
*/ }O8#4-E_Ji
private void insertSort(int[] data, int start, int len) { Os)}kkja
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D1~3 3;
} ;mXw4_{
} B'KZ >jO
} YvPs
} !po29w:S
^:]~6p#
堆排序： J0yo@O
i]IZ0.?Y
package org.rut.util.algorithm.support; S*a_
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import org.rut.util.algorithm.SortUtil; CDGN}Q2_
u =|A
/** "kkZK=}Nv
* @author treeroot qW t 9Tr
* @since 2006-2-2 BZRC0^-C@
* @version 1.0 Jc,{n*
*/ so }Kb3n
public class HeapSort implements SortUtil.Sort{ QW6\~l 4
6Ej@;]^^-
/* (non-Javadoc) z=a{;1A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2w67>w\
*/ 84YZT+TEN
public void sort(int[] data) { gfU!sYZ
MaxHeap h=new MaxHeap(); n##d!d|g
h.init(data); |d=MX>i|G
for(int i=0;i h.remove(); `+EjmY
System.arraycopy(h.queue,1,data,0,data.length); 3&7$N#v
} nnBl:p>< k
7VKTI:5y
private static class MaxHeap{ Oz7WtN
H8?Kgaj~vf
void init(int[] data){ ccJ!N
this.queue=new int[data.length+1]; uNG?`>4>
for(int i=0;i queue[++size]=data; 16n8[U!
fixUp(size); [9xUMX^}
} EFS2 zU
} 3NC-)S
(f?&zQ!+
private int size=0; L\y>WR%s
tJ@5E^'4
private int[] queue; exL<cN
yXL]uh#b
public int get() { mdPEF)-
return queue[1]; PV/SzfvIq
} Mwd(?o
e$y VV#
public void remove() { ~$Pz`amT|
SortUtil.swap(queue,1,size--); FT.;}!"l
fixDown(1); Oj^qh+r
} 4O** %!|
file://fixdown '}$$o1R
private void fixDown(int k) { -%t2_g,
int j; _ya_Jf*
while ((j = k << 1) <= size) { H}B%OFI\+
if (j < size %26amp;%26amp; queue[j] j++; [_?dpaTt
if (queue[k]>queue[j]) file://不用交换 "1Oe bo2
break; 2^C>orKQ0
SortUtil.swap(queue,j,k); `+O7IyTMA
k = j; Ff@Cs0R
} and)>$)|
} $C8nPl' 7
private void fixUp(int k) { Wa+q[E
while (k > 1) { V_Oj?MMpn
int j = k >> 1; >gFEA0-
if (queue[j]>queue[k]) =g+Rk+jn
break; "iY=1F"\R
SortUtil.swap(queue,j,k); MUfhk)"
k = j; @>sZ'M2mq
} 1O,<JrE+-
} V,qc[*_3
mh=YrDU+L
} ]~1Xx:X-
P\R#!+FgW8
} KWH l+pL
q2C._{ 0'
SortUtil： `c~J&@|
_]# ^2S
package org.rut.util.algorithm; zs~v6y@
k2cC:5Xf3
import org.rut.util.algorithm.support.BubbleSort; (+ibT;!]
import org.rut.util.algorithm.support.HeapSort; ~t-!{F
import org.rut.util.algorithm.support.ImprovedMergeSort; Vy7o}z`
import org.rut.util.algorithm.support.ImprovedQuickSort; `gFE/i18
import org.rut.util.algorithm.support.InsertSort; ~'<ca<Go|
import org.rut.util.algorithm.support.MergeSort; o)pso\;
import org.rut.util.algorithm.support.QuickSort; >l3iAy!sZ
import org.rut.util.algorithm.support.SelectionSort; j6_tFJT
import org.rut.util.algorithm.support.ShellSort; QZs ]'*=#
aEW sru
/** 5p7?e3
* @author treeroot $06[D91'
* @since 2006-2-2 %}=:gF
* @version 1.0 QFtf.")[.
*/ <4|/AF*>
public class SortUtil { oX #WT
public final static int INSERT = 1; w( ^
public final static int BUBBLE = 2; efu'PfZ`&
public final static int SELECTION = 3; nW*D
public final static int SHELL = 4; E'O[E=
public final static int QUICK = 5; zZax![Z
public final static int IMPROVED_QUICK = 6; t+?m<h6w;l
public final static int MERGE = 7; 7A mnxFC
public final static int IMPROVED_MERGE = 8; 9Oe~e
public final static int HEAP = 9; q/lQEfR
?' :v):J}
public static void sort(int[] data) { awic9uMH
sort(data, IMPROVED_QUICK); jJK`+J,i}X
} Q'B2!9=LB
private static String[] name={ %P2l@}?a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" = olmBXn/
}; yxx'g+D*
GF=rGn@,)`
private static Sort[] impl=new Sort[]{ <_N<L\
new InsertSort(), tr t^o
new BubbleSort(), e 1$<,.>
new SelectionSort(), aF41?.s
new ShellSort(), W1T% Q88
new QuickSort(), e(~9JP9
new ImprovedQuickSort(), ^L@2%}6b`
new MergeSort(), e: aa
new ImprovedMergeSort(), d~F4
new HeapSort() 34gC[G=
}; 4Lb!Au|Y
~0 Ifg_G
public static String toString(int algorithm){ hE|W%~Jx
return name[algorithm-1]; &Q`{ Gk
} C3"5XR_Ov
j@HOU~x
public static void sort(int[] data, int algorithm) { tvlrUp
impl[algorithm-1].sort(data); (rfR:[JkC2
} p?v.42R:z
O;dtz\
public static interface Sort { 'fIoN%
public void sort(int[] data); 'C2X9/!,
} s9)U",
ODO'!T-
public static void swap(int[] data, int i, int j) { O8Dav^\y?
int temp = data; p-Jp/*R5
data = data[j]; 9z$fDs}.q
data[j] = temp; 2]}4)_&d<e
} T{:~v+I=
} S[ln||{