[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; V\ch0i 1
} TFbCJ@X
int i1=l; bL_s[-7
int i2=mid+1; Uy^Hh4|
for(int cur=l;cur<=r;cur++){ AKx\U?ei7
if(i1==mid+1) rMxst
data[cur]=temp[i2++]; {l{p
else if(i2>r) ?I}jsm1)
data[cur]=temp[i1++]; +P|$T:b
else if(temp[i1] data[cur]=temp[i1++]; 7c!oFwM
else ~6U@*Svk
data[cur]=temp[i2++]; 3Zg=ZnF
} U@yrqT@;AU
} Rg)\o(J
yGgHd=?
} `}k!SqG
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改进后的归并排序: LW_Y
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package org.rut.util.algorithm.support; I /3=~;u
^i&Qr+v
import org.rut.util.algorithm.SortUtil; )ZzwD]
]]o7ej
/** i051qpj
* @author treeroot N;A1e@bP
* @since 2006-2-2 1mOZ\L!m*
* @version 1.0 ']$ttfJB
*/ <9-tA\`8N
public class ImprovedMergeSort implements SortUtil.Sort { 3Zsqx=w
m#, F%s
private static final int THRESHOLD = 10; _jH1Mcq
g-mK(kY4p
/* mDipP
* (non-Javadoc) RTA9CR)JP4
* @SPmb o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <<(~'$~,L
*/ }llzO
public void sort(int[] data) { pX6T7
int[] temp=new int[data.length]; d(,-13
mergeSort(data,temp,0,data.length-1); ;knSn$
} ,!kyrk6
ec1snMY
private void mergeSort(int[] data, int[] temp, int l, int r) { 8v1asFxs.
int i, j, k; 6#N1 -@
int mid = (l + r) / 2; \ :})R{
if (l == r) *bn9j>|iv
return; y$*?k0=ZX
if ((mid - l) >= THRESHOLD) PNT.9 *d
mergeSort(data, temp, l, mid); w|Zq5|[
else aEXV^5;,pJ
insertSort(data, l, mid - l + 1); \#tr4g~u
if ((r - mid) > THRESHOLD) qfC9 {gu
mergeSort(data, temp, mid + 1, r); 0J$wX yh
else s`C#=l4
insertSort(data, mid + 1, r - mid); dp)lHBV
)~d2`1zGS
for (i = l; i <= mid; i++) { ^!{oyw
temp = data; 9<7Q{
} Yc:b:\0}F6
for (j = 1; j <= r - mid; j++) { A40 -])'!
temp[r - j + 1] = data[j + mid]; PG<N\
} =eac,]31
int a = temp[l]; Uw61X>y=
int b = temp[r]; sf\;|`}
for (i = l, j = r, k = l; k <= r; k++) { .%->
if (a < b) { NXeo&+F
data[k] = temp[i++]; TM!R[-\
a = temp; Vz 5:73
} else { 1b6gTfU
data[k] = temp[j--]; xO1d^{~^^
b = temp[j]; 6J%SkuxR
} XF^c(*5
} b4%IyJr
} Syp|s3u;
h^hEyrJw
/** wk9tJ#}
* @param data U45/%?kE)
* @param l 2d.I3z:[
* @param i 7UQD02
*/ = 1}-]ctVn
private void insertSort(int[] data, int start, int len) { 9%zR?u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DVTzN(gO*~
} 4i~;Ql
} qh.c#t
} J\;~(: ~
} M?nnpO
.)cOu>
堆排序： &`>*3m(
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package org.rut.util.algorithm.support; ~PlwPvWo
5I&^n0h|&
import org.rut.util.algorithm.SortUtil; [&{"1Z
DN^ln%#
/** 5V?1/
* @author treeroot /%xK-z,V
* @since 2006-2-2 U#F(#3/
* @version 1.0 *D<sk7
*/ }FM<uBKW
public class HeapSort implements SortUtil.Sort{ Ccc6 ko_
+IS$Un
/* (non-Javadoc) FswFY7 8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cz T@txF
*/ dk(-yv'
public void sort(int[] data) { }U^9(
MaxHeap h=new MaxHeap(); =<e# 2
h.init(data); DdSUB
for(int i=0;i h.remove(); RhQOl9
System.arraycopy(h.queue,1,data,0,data.length); Ix *KL=MG
} 'HqAm$V+
>_F&oA#
private static class MaxHeap{ yY"%6k,ZB
#;mZ3[+i5
void init(int[] data){ Oi7=z?+j
this.queue=new int[data.length+1]; ;<&s_C3
for(int i=0;i queue[++size]=data; yS3x))
fixUp(size); Sl$dXB@
} pp{);
} U-lN_?
uq 6T|Zm
private int size=0; T.1z<l""
6=')*_~/
private int[] queue; lA]u8+gXd
d!gm4hQhl
public int get() { Q|v=WC6
return queue[1]; 6iC}%eU
} 2j"%}&
r{<u\>6X>P
public void remove() { #%{\59/w
SortUtil.swap(queue,1,size--); 3Q;^X(Ml*
fixDown(1); huq6rA/i
} hCo&SRC/5
file://fixdown JI*ikco-
private void fixDown(int k) { F2:7UNy,
int j; u8W*_;%:
while ((j = k << 1) <= size) { $ o t"Du
if (j < size %26amp;%26amp; queue[j] j++; DI&xTe9k
if (queue[k]>queue[j]) file://不用交换 )Z;Y,g
break; =riP~%_ML)
SortUtil.swap(queue,j,k); 't|F}@HP
k = j; !tbRqW6v
} lo(Ht=d
} Fza)dJ7
private void fixUp(int k) { @Td[rHl
while (k > 1) { 6Nl$&jL
int j = k >> 1; <wSmfg,yF
if (queue[j]>queue[k]) 9m'[52{o
break; Y3Qq'FN!I
SortUtil.swap(queue,j,k); .(Pe1pe
k = j; sO
} FSBCk
} -p;oe}|
X,q=JS
} pGcc6q1
{jc~s~<#
} We4 FR4`
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SortUtil： Wh<lmC50(
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package org.rut.util.algorithm; 1a)_Lko
34?yQX{
import org.rut.util.algorithm.support.BubbleSort; ~/#?OLj(T
import org.rut.util.algorithm.support.HeapSort; ke4q$pD
import org.rut.util.algorithm.support.ImprovedMergeSort; L;f=\q"g
import org.rut.util.algorithm.support.ImprovedQuickSort; JDhA{VN6
import org.rut.util.algorithm.support.InsertSort; j)]'kg
import org.rut.util.algorithm.support.MergeSort; nAX|=qp#
import org.rut.util.algorithm.support.QuickSort; pIrAGA;
import org.rut.util.algorithm.support.SelectionSort; T4#knSIlh
import org.rut.util.algorithm.support.ShellSort; 5m bs0GL
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/** ~::R+Lh(
* @author treeroot fwnpmuJ
* @since 2006-2-2 Sx~_p3_5U
* @version 1.0 RXof$2CZS
*/ '~f@p~P
public class SortUtil { Z8#I
public final static int INSERT = 1; :E^B~ OuL
public final static int BUBBLE = 2; y$&a(S]
public final static int SELECTION = 3; 2$Ji4`p}S
public final static int SHELL = 4; ,yqzk.
public final static int QUICK = 5; zbi
public final static int IMPROVED_QUICK = 6; lt$797
public final static int MERGE = 7; c,-x}i0c
public final static int IMPROVED_MERGE = 8; 'LOqGpmVc
public final static int HEAP = 9; ^GAdl}
oy`m:Xp
public static void sort(int[] data) { g:6yvEu$ -
sort(data, IMPROVED_QUICK); ^&<*$Ai~
} 2lSM`cw
private static String[] name={ FEZ6X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KGWENX_U
}; q%'ovX(dm
395o[YZx*
private static Sort[] impl=new Sort[]{ EGDE4n5>I
new InsertSort(), C&st7. (k
new BubbleSort(), -#o+x Jj
new SelectionSort(), m ZhVpIUO
new ShellSort(), xWwPrd
new QuickSort(), v-gT 3kJ
new ImprovedQuickSort(), rzmk-V
new MergeSort(), [.I,B tY+
new ImprovedMergeSort(), WV@Tm$r
new HeapSort() $`Xx5Ts7
}; B5cyX*!?
w@ 5/mf?
public static String toString(int algorithm){ Hb+#*42v
return name[algorithm-1]; ]dK]a:S
} rO`g~>-
.apX72's,
public static void sort(int[] data, int algorithm) { )f!dG(\&#
impl[algorithm-1].sort(data); '=~y'nPG7
} Z+dR(9otH3
5muW*7
public static interface Sort { Gh|!FRK[$
public void sort(int[] data); z-gwNE{
} &0eB@8{N
ke#;1
public static void swap(int[] data, int i, int j) { 4@V]zfu^Q
int temp = data; 5p|@)
data = data[j]; }>w
data[j] = temp; >YBpB,WND
} `eWcp^|
} 0;h1LI)