[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; c<Q*g
} "`Xbi/i
int i1=l; 3 "Qg"\
int i2=mid+1; cVmF'g
for(int cur=l;cur<=r;cur++){ 8N<mV^|}
if(i1==mid+1) sdgI ,
data[cur]=temp[i2++]; 4"^W/Zo
else if(i2>r) 7.kH="@
data[cur]=temp[i1++]; BcQw-<veu
else if(temp[i1] data[cur]=temp[i1++]; mFd|JbW
else :)+)L@By
data[cur]=temp[i2++]; aH,NS
} YnCuF0>
} Ms+SJ5Lg
#TeAw<2U
} ,1vFX$
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改进后的归并排序: AthR|I|8
kmu7~&75
package org.rut.util.algorithm.support; oj,;9{-
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import org.rut.util.algorithm.SortUtil; ~BnmAv$m[
m/,8\+
/** _u~`RlA
* @author treeroot AD6 b
* @since 2006-2-2 D<*)^^
* @version 1.0 /}5)[9GC
*/ !!~r1)zN
public class ImprovedMergeSort implements SortUtil.Sort { 'loko#6
VZ9`Kbu
private static final int THRESHOLD = 10; =~21.p
N)KN!!
/* )2:U]d%pk
* (non-Javadoc) Y"m}=\4{
* `vf]C'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~C?)- ]bF
*/ m*KI'~#$%
public void sort(int[] data) { &nY#GHB
int[] temp=new int[data.length]; )cm^;(#pV
mergeSort(data,temp,0,data.length-1); EKmn@S-&P
} #VZ js`d6
/d$kz&aIV
private void mergeSort(int[] data, int[] temp, int l, int r) { 5R1?jlm
int i, j, k; ~cfvL*~5
int mid = (l + r) / 2; SzUH6|=.R=
if (l == r) j& L@L.d
return; i3$pqNe
if ((mid - l) >= THRESHOLD) aZo>3z;
mergeSort(data, temp, l, mid); 81)i>]
else j`MK\*qmz
insertSort(data, l, mid - l + 1); >;fn,9w
if ((r - mid) > THRESHOLD) Sa:;j4
mergeSort(data, temp, mid + 1, r); %e+*&Z',
else iN5[x{^t
insertSort(data, mid + 1, r - mid); * C*aH6*
i=V2 /W}
for (i = l; i <= mid; i++) { 7<X!Xok
temp = data; 2=naPTP(
} >.hDt9@4
for (j = 1; j <= r - mid; j++) { 9]I{GyH
temp[r - j + 1] = data[j + mid]; 1I8<6pi-
} ^Qxv5HS2
int a = temp[l]; J!@R0U.
int b = temp[r]; w)/~Gn676
for (i = l, j = r, k = l; k <= r; k++) { QEF$Jx
if (a < b) { 7(<r4{1?
data[k] = temp[i++]; d?/>Qqw:#
a = temp; e&NJj:Ph*
} else { vxrqUjK7
data[k] = temp[j--]; X*hPE=2` p
b = temp[j]; LFvZ 7M\\
} In;+wFu;M
} @r\{iSg&g.
} ]y"=/Nu-Ja
$1k@O@F(4
/** #+|0o-
* @param data |vxmgX)
* @param l ]q&NO(:kbq
* @param i NT9|``^Z
*/ cV4Y= &
private void insertSort(int[] data, int start, int len) { yI%q3lB}^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XS.*CB_m_
} f#gV>.P;h\
} w`gT]Rn
} Bz>5OuOVS\
} ciFqj3JS
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堆排序： Epm8S}6K
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package org.rut.util.algorithm.support; F;BCSoO4
c Ze59
import org.rut.util.algorithm.SortUtil; $\PU Y8
Ms-)S7tMz
/** SEH[6W3
* @author treeroot %pf9Yd0t
* @since 2006-2-2 sFsf~|
* @version 1.0 9q\_UbF
*/ fm q(!
public class HeapSort implements SortUtil.Sort{ (D{J|
D/hq~- g
/* (non-Javadoc) `O0y8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ns5P,[pBOZ
*/ eL{$=Um
public void sort(int[] data) { be?Bf^O>
MaxHeap h=new MaxHeap(); ZEvK
h.init(data); YWL7.Y>%5
for(int i=0;i h.remove(); flOXV
System.arraycopy(h.queue,1,data,0,data.length); )c532 y
} ^1_CS*
,RP9v*
private static class MaxHeap{ :@-.whj
jINI<[v[
void init(int[] data){ #L57d
this.queue=new int[data.length+1]; Q8$;##hzt
for(int i=0;i queue[++size]=data; (*AJ6BQWa
fixUp(size); lr@w1*
} "/Gw`^t
} 6{yn;D4
m7i(0jd +
private int size=0; }c>vk
d1'= \PYr
private int[] queue; *p9k> )'J
!T 9CpIM%
public int get() { O2"V'(
return queue[1]; ekqS=KfWl;
} RL fQT_V
k"%sdYkb!
public void remove() { k;)mc+ ~+
SortUtil.swap(queue,1,size--); c c/nzB
fixDown(1); pgZQ>%
} @.`k2lxGd~
file://fixdown !YZKa-
private void fixDown(int k) { w\{#nrhYU
int j; kp#XpcS
while ((j = k << 1) <= size) { Oqq'r"S
if (j < size %26amp;%26amp; queue[j] j++; ?CcX>R-/
if (queue[k]>queue[j]) file://不用交换 4t3>`x 7
break; /XU=l0u
SortUtil.swap(queue,j,k); }w-M.
k = j; dczSW]%
} PZlPC#E-
} *xY3F8
private void fixUp(int k) { Ge7B%p8
while (k > 1) { tmoaa!yRnT
int j = k >> 1; M9m~ck
if (queue[j]>queue[k]) Wh~,?}laj
break; &0fV;%N
SortUtil.swap(queue,j,k); XODp[+xEEt
k = j; PsD)]V9%:
} uZ'Z-!=CL
} !nlr!+(fV
Sw5:T
} F^S]7{
.rnT'""i<5
} gsl_aW!
.w'b%M
SortUtil： 1&<o3)L:
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package org.rut.util.algorithm; }[h]z7e2S
l-S0Gn/'X
import org.rut.util.algorithm.support.BubbleSort; #f/4%|t:
import org.rut.util.algorithm.support.HeapSort; 9)o@d`*
import org.rut.util.algorithm.support.ImprovedMergeSort; 'cQ,;y
import org.rut.util.algorithm.support.ImprovedQuickSort; c\&;Xr
import org.rut.util.algorithm.support.InsertSort; }maD8,:t
import org.rut.util.algorithm.support.MergeSort; qywl G
import org.rut.util.algorithm.support.QuickSort; n&zEYCSI
import org.rut.util.algorithm.support.SelectionSort; *X ;ch55\
import org.rut.util.algorithm.support.ShellSort; aw~h03R_Z
5h0Hk<N
/** 7J ?s&x
* @author treeroot _Hfpizm
* @since 2006-2-2 B& R?{y*
* @version 1.0 ^u1Nbo
*/ |5X59! JL
public class SortUtil { 9yWf*s<
public final static int INSERT = 1; N:'!0|6?x-
public final static int BUBBLE = 2; 56.JBBZZ
public final static int SELECTION = 3; *+2_!=4V
public final static int SHELL = 4; ;Bj&9DZd
public final static int QUICK = 5; u86PTp+
public final static int IMPROVED_QUICK = 6; ~(huUW
public final static int MERGE = 7; :@ VCKq!
public final static int IMPROVED_MERGE = 8; +"bi]^\z
public final static int HEAP = 9; pV_zePyOn
Uxik&M
public static void sort(int[] data) { 3EY m@oZj
sort(data, IMPROVED_QUICK); /!A"[Tyt
} P8|ANe1 v
private static String[] name={ V2M4g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yNn=r;FZQ
}; !E_|Zp]up
UnYb}rF#%
private static Sort[] impl=new Sort[]{ +zq"dj_
new InsertSort(), $p&eS_f
new BubbleSort(), |yzv o"3
new SelectionSort(), #s15AyKz5
new ShellSort(), 5>daWmD
new QuickSort(), c00rq ~<K
new ImprovedQuickSort(), +PI}$c-|`
new MergeSort(), gsM^Pu09ud
new ImprovedMergeSort(), \AA9 m'BZ
new HeapSort() -C}"1|P!
}; _z{9V7n4
#N>66!/V
public static String toString(int algorithm){ ls!A'@J
return name[algorithm-1]; 9p3~WA/M@
} F kf4R5Y?
;in-)`UC!
public static void sort(int[] data, int algorithm) { GEh(pJ
impl[algorithm-1].sort(data); <)T~_s
} >A6W^J|[
ztX$kX:_m
public static interface Sort { YM'4=BlJHv
public void sort(int[] data); 9#&H'mG
} `BG>%#
<OKc?[
public static void swap(int[] data, int i, int j) { rxyeix
int temp = data; fDfph7[)
data = data[j]; ty rP[y
data[j] = temp; 7Re\*[)T
} S7nx4c2xK~
} ~LV]cX2J(