[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; `Jn,IDq
} %/P=m-K
int i1=l; 0;}Aj8Fle
int i2=mid+1; ?sV[MsOsC
for(int cur=l;cur<=r;cur++){ 6dF$?I&
if(i1==mid+1) D~Z=0yD
data[cur]=temp[i2++]; [!^cd%l
else if(i2>r) ows^W8-w
data[cur]=temp[i1++]; 6H0W`S0a
else if(temp[i1] data[cur]=temp[i1++]; gzor%)C
else ppEJs
data[cur]=temp[i2++]; S,lxM,DL&
} doLkrEm&
} Ymq3ty]Pe
S2ark,sp6
} Zotz?jVVr
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改进后的归并排序: e[s5N:IUd3
Z*9L'd"D|
package org.rut.util.algorithm.support; f7Yz>To
8fnR1mWG
import org.rut.util.algorithm.SortUtil; pP3U,n
iu+3,]7Fm
/** 3a'q`.L
* @author treeroot a~WqUL
* @since 2006-2-2 G OpjRA@
* @version 1.0 sN-oEqS
*/ ]5N zK=2{
public class ImprovedMergeSort implements SortUtil.Sort { \[cH/{nt
n<E.Em1
private static final int THRESHOLD = 10; pL~=Z?(B
VO9XkA7
/* [KMS<4t'
* (non-Javadoc) C(s\LI!r
* w}d}hI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PQ,+hq
*/ 2sUbiDe-
public void sort(int[] data) { QeL{Wa-2F
int[] temp=new int[data.length]; 58J_ w X
mergeSort(data,temp,0,data.length-1); IK3qE!,&U
} @.k5MOn
^+M><jE9
private void mergeSort(int[] data, int[] temp, int l, int r) { tR<L`?4
int i, j, k; r]0(qg
int mid = (l + r) / 2; `0?^[;[u[
if (l == r) 9<v}LeX
return; sW?B7o?
if ((mid - l) >= THRESHOLD) 3EmcYC
mergeSort(data, temp, l, mid); D{R/#vM jk
else @m?{80;uQ
insertSort(data, l, mid - l + 1); >{QdMn
if ((r - mid) > THRESHOLD) JPsSw
mergeSort(data, temp, mid + 1, r); *E}Oh
else 2% %|fU9
insertSort(data, mid + 1, r - mid); l]$40 j
}%+qP+O\
for (i = l; i <= mid; i++) { Y[?`\c|
temp = data; LP,9<&"<
} bK<}0Ja[
for (j = 1; j <= r - mid; j++) { -Un=TX
temp[r - j + 1] = data[j + mid]; uWTN2jr
} '6X%=f'^b
int a = temp[l]; <PioQ>~
int b = temp[r]; z>|)ieL
for (i = l, j = r, k = l; k <= r; k++) { "c,!vc4
if (a < b) { tn{8u7
data[k] = temp[i++]; }'TTtV:Q
a = temp; Jh?z=JY
} else { R4SxFp
data[k] = temp[j--]; _jmkl B
b = temp[j]; v J-LPTB
} n8$=f'Hgb
} P_}/#N{C
} V!xwb:J
Pcdf$a"`
/** 5U~OP
* @param data lbS?/f
* @param l 6JH56
* @param i YDFCGA
*/ XVF^,Yf
private void insertSort(int[] data, int start, int len) { q & b5g !
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7@IFp~6<qK
} EE]=f=3
} .'/l'>
} b_=8!Q.:
} 2e.N"eLNt
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堆排序： b=1%pX_
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package org.rut.util.algorithm.support; +]c}rWm
V&[eSVY?
import org.rut.util.algorithm.SortUtil; U(~U!O}
4V$fGjJ3
/** sAYV)w3u"
* @author treeroot g4wZvra6%)
* @since 2006-2-2 VgMP^&/gZ
* @version 1.0 |1l&@#j!2
*/ %`+'v_iu
public class HeapSort implements SortUtil.Sort{ ej52AK7
jo_ sAb
/* (non-Javadoc) xnbsg!`;7W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N_G4_12(
*/ e:OyjG5_
public void sort(int[] data) { 6/6Rah!
MaxHeap h=new MaxHeap(); Hbk&6kS
h.init(data); FJT1i@N
for(int i=0;i h.remove(); _]=9#Fg7{
System.arraycopy(h.queue,1,data,0,data.length); CZ3].DA|z
} 9!}q{2j
G52Z)^
private static class MaxHeap{ ErDL^M-`
LeHiT>aX!
void init(int[] data){ etyCrQ ?U
this.queue=new int[data.length+1]; '9J*6uXf.
for(int i=0;i queue[++size]=data; 6^E`Sa!s
fixUp(size); o@/xPo|
} w<t,j~ Pr#
} qVBL>9O*.
*Hs*,}MS
private int size=0; -=)-sm'
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private int[] queue; ,[`$JNc
*vnXlV4L
public int get() { xmr|'}Pt[
return queue[1]; p)3nyN=|_
} #mLuU
ia4k:\
public void remove() { TvQ^DZbe
SortUtil.swap(queue,1,size--); !;dSC<
fixDown(1); R#qI(V
} eOnTW4
file://fixdown .X `C^z]+
private void fixDown(int k) { |s=`w8p
int j; 8Kk\*8 <
while ((j = k << 1) <= size) { %l7fR}
if (j < size %26amp;%26amp; queue[j] j++; PLdn#S}.
if (queue[k]>queue[j]) file://不用交换 RUGv8"j
break; aFY u}kl
SortUtil.swap(queue,j,k); KG8W8&q
k = j; fg&eoI'f
} \.<KA
} PAZ$_eSK6
private void fixUp(int k) { V=}1[^
while (k > 1) { ~R.dPUr
int j = k >> 1; n"G`b
if (queue[j]>queue[k]) maC>LBa2/
break; z[9UQU~x?
SortUtil.swap(queue,j,k); (}gcY
k = j; 6GINmkA
} 4:1)~z
} Mo^`\/x!
jN/ j\x'
} =;{^"#r\
r{[OJc!
} n &}s-`D
s[AA7>]3
SortUtil： 1R*=.i%W
6D/'`
package org.rut.util.algorithm; Hk;-5A|9
zn)yFnB!TH
import org.rut.util.algorithm.support.BubbleSort; `;F2n2@
import org.rut.util.algorithm.support.HeapSort; Fr5 Xp
import org.rut.util.algorithm.support.ImprovedMergeSort; 3z[$4L'.
import org.rut.util.algorithm.support.ImprovedQuickSort; @`|)Ia<
import org.rut.util.algorithm.support.InsertSort; Q2s&L]L=
import org.rut.util.algorithm.support.MergeSort; ctI{^f:
import org.rut.util.algorithm.support.QuickSort; uZ(? >
import org.rut.util.algorithm.support.SelectionSort; u~F~cDu
import org.rut.util.algorithm.support.ShellSort; Eg8i _s~:
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/** MzTW8
* @author treeroot ;>ozEh#8w
* @since 2006-2-2 s".HEP~]=
* @version 1.0 ,W*H6fw+
*/ 1 Z[f {T)
public class SortUtil { kMxjS^fr
public final static int INSERT = 1; Gvx[8I
public final static int BUBBLE = 2; ^Mytp>7
public final static int SELECTION = 3; FtIa*j^G
public final static int SHELL = 4; p2d\ZgWD=)
public final static int QUICK = 5; ZK!A#Jm{
public final static int IMPROVED_QUICK = 6; T20VX 8gX
public final static int MERGE = 7; 7SS07$B
public final static int IMPROVED_MERGE = 8; YD&_^3-XM
public final static int HEAP = 9; KQmZ#W%2m
!buz<h
public static void sort(int[] data) { N.hzKq][
sort(data, IMPROVED_QUICK); W3JF5*
} .zC*Z&e,.[
private static String[] name={ A';QuWdT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {p/YCch,
}; ]vo_gKZ
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private static Sort[] impl=new Sort[]{ 9_huI'"p
new InsertSort(), m{(+6-8|m
new BubbleSort(), NP_?f%(
new SelectionSort(), K ,isjh2
new ShellSort(), `|Fp^gM
new QuickSort(), Ceg!w#8Z,
new ImprovedQuickSort(), "s_Z&
new MergeSort(), +jV_Wz
new ImprovedMergeSort(), `&*bM0(J
new HeapSort() wk[ wNIu
}; :&yDqoQKJ
^:cRp9l"7
public static String toString(int algorithm){ '3;v] L?G
return name[algorithm-1]; 2 ZG@!Y|
} <Ar$v'W=F{
+)/Uu3"=
public static void sort(int[] data, int algorithm) { {#hVD4$b
impl[algorithm-1].sort(data); E%3TP_B3
} 7z'ha?
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public static interface Sort { 5w<A;f
public void sort(int[] data); L *Y|ey
} U[||~FW'
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public static void swap(int[] data, int i, int j) { =NDOS{($
int temp = data; pP.'wSj
data = data[j]; DW2>&|
data[j] = temp; Mv|!2 [:
} F ?=9eISLJ
} !%S4n