[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; X9V*UXTc
} ;>Ib^ov
int i1=l; @J/K-.r
int i2=mid+1; koug[5T5
for(int cur=l;cur<=r;cur++){ "]} bFO7C
if(i1==mid+1) dl.p\t(1
data[cur]=temp[i2++]; 3ca (i/c
else if(i2>r) %WjXg:R
data[cur]=temp[i1++]; fbe[@#:
else if(temp[i1] data[cur]=temp[i1++]; MDnua
else R[D{|K@"
data[cur]=temp[i2++]; (,0(
} GBPo8L"9
} FOE4>zE
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} ^'PWI{ O
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改进后的归并排序: K &N
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package org.rut.util.algorithm.support; 3EPv"f^V
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import org.rut.util.algorithm.SortUtil; sYI-5D]
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/** rC^WPW
* @author treeroot u7>],<
* @since 2006-2-2 zBzZxK>$
* @version 1.0 u. F9g #
*/ VY7[)
public class ImprovedMergeSort implements SortUtil.Sort { _l89
\!.B+7t=I
private static final int THRESHOLD = 10; UM"- nZ>[
[1Qo#w1
/* +nFu|qM}
* (non-Javadoc) <Zmg#
* lR6@ xJd:@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qm/22:&v5
*/ V_.5b&@
public void sort(int[] data) { Q+{xZ'o"Z
int[] temp=new int[data.length]; AP?R"%
mergeSort(data,temp,0,data.length-1); D2Kp|F;
} tEvut=k'
u04kF^
private void mergeSort(int[] data, int[] temp, int l, int r) { G[uK-U
int i, j, k; (x;@%:3j$
int mid = (l + r) / 2; nFHUy9q
if (l == r) ^ B fC
return; )q8pk2
if ((mid - l) >= THRESHOLD) K0|FY=#2y
mergeSort(data, temp, l, mid); 2*laAB
else #A JDWelD
insertSort(data, l, mid - l + 1); 3u+T~g0^
if ((r - mid) > THRESHOLD) }C"%p8=HM
mergeSort(data, temp, mid + 1, r); V^bwXr4f
else ?BeiY zg
insertSort(data, mid + 1, r - mid); .ypL=~Rp
^@s1Z7
for (i = l; i <= mid; i++) { $r@zs'N
temp = data; 6]WAUK%h
} 98IJu
for (j = 1; j <= r - mid; j++) { -b9\=U[
temp[r - j + 1] = data[j + mid]; @=}0`bE
} l<58A7
int a = temp[l]; [}E='m}u9+
int b = temp[r]; `EA\u]PwQ
for (i = l, j = r, k = l; k <= r; k++) { 61C7.EZZ;
if (a < b) { \/r}]Vz
data[k] = temp[i++]; HdUQCugxx:
a = temp; P64PPbP
} else { :+^lJ&{U
data[k] = temp[j--]; 6 $4[gcL'
b = temp[j]; l*(8i ^
} -A^_{4X
} ZB= E}]v6
} NRs13M<ftf
/=nJRC3.
/** 2j[=\K]
* @param data C!<Ou6}!b
* @param l H(ARw'M
* @param i ~D j8z+^
*/ oGnSPI5KGC
private void insertSort(int[] data, int start, int len) { we//|fA<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [6Izlh+D
} q_[o"wq/
} ]nn98y+
} !Iy_UfW
} V(I8=rVH
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堆排序： i+ ?^8#
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package org.rut.util.algorithm.support; =7=]{Cx[
F]O`3e=!
import org.rut.util.algorithm.SortUtil; Cw3a0u
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/** Tv,[DI +
* @author treeroot O3,jg|,
* @since 2006-2-2 w3ResQ
* @version 1.0 2~)`N>@
*/ `KoV_2|
public class HeapSort implements SortUtil.Sort{ ~^:A{/
gD@){Ip
/* (non-Javadoc) AofKw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V+Y%v.F
*/ sUO`uqZV
public void sort(int[] data) { I^-Sb=j?Z
MaxHeap h=new MaxHeap(); NIry)'"
h.init(data); 0 1rK8jX
for(int i=0;i h.remove(); Q->sV$^=T
System.arraycopy(h.queue,1,data,0,data.length); i>`%TW:g
} Naf0)3q>!
/hR&8 `\\
private static class MaxHeap{ -=Q*Ml#I
~!d\^Z^i
void init(int[] data){ 9s q
this.queue=new int[data.length+1]; )D7m,Wi+
for(int i=0;i queue[++size]=data; D%pF;XY
fixUp(size); `4J$Et%S
} K\Wkoi5
} iOghb*aW
'o2Fa_|<#
private int size=0; Dw.J2>uj
m+[Ux{$
private int[] queue; c7k~S-nU
H/ HMm{4
public int get() { Ax7[;|2
return queue[1]; &K#M*B,*p
} ""G'rN_=Bi
.uZ3odMlx
public void remove() { oJz^|dW
SortUtil.swap(queue,1,size--); \!ZTL1b8t
fixDown(1); JX;G<lev
} QA`sx
file://fixdown aeJHMHFc
private void fixDown(int k) { YK'<NE3 4
int j; n b?lTX~
while ((j = k << 1) <= size) { .|70;
if (j < size %26amp;%26amp; queue[j] j++; |0b`fOS
if (queue[k]>queue[j]) file://不用交换 zwjgE6
break; [}=B8#Jl-C
SortUtil.swap(queue,j,k); e X|m
k = j; AQvudx)@"
} 6A-|[(NS
} /W<;Z;zk
private void fixUp(int k) { jV1.Yz(`
while (k > 1) { r`d4e,(
int j = k >> 1; [RhO$c$[\
if (queue[j]>queue[k]) |/{=ww8|
break; SY\ gXO8k
SortUtil.swap(queue,j,k); ",; H`V
k = j; ~B?y{
} 8cIKvHx
} Ve; n}mJ?
/ zPO
} @qAS*3j
*^ZV8c}
} V**~m9f
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SortUtil： `Ggbi4),
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package org.rut.util.algorithm; 8(~h"]`!
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import org.rut.util.algorithm.support.BubbleSort; H<,gU`&R
import org.rut.util.algorithm.support.HeapSort; $'M!HJxb
import org.rut.util.algorithm.support.ImprovedMergeSort; iqWQ!r^
import org.rut.util.algorithm.support.ImprovedQuickSort; on`3&0,.
import org.rut.util.algorithm.support.InsertSort; 6LIJQ
import org.rut.util.algorithm.support.MergeSort; HIZe0%WPw
import org.rut.util.algorithm.support.QuickSort; Kn1a>fLaJ_
import org.rut.util.algorithm.support.SelectionSort; E ~<JC"]
import org.rut.util.algorithm.support.ShellSort; ](8[}CeL
G_,jgg7
/** >|UOz&
* @author treeroot %IWPM"
* @since 2006-2-2 2FJ*f/
* @version 1.0 ^<2p~h0 \
*/ LZY"3Jn[nQ
public class SortUtil { lt8|9"9<
public final static int INSERT = 1; A3/k@S-R2
public final static int BUBBLE = 2; 1mG-}
public final static int SELECTION = 3; kt:! 7
public final static int SHELL = 4; YIYmiv5
public final static int QUICK = 5; EaN6^S=
public final static int IMPROVED_QUICK = 6; ZUd-<y
public final static int MERGE = 7; r;N|)
public final static int IMPROVED_MERGE = 8; u'BaKWPS
public final static int HEAP = 9; (*iHf"=\
[{,1=AB
public static void sort(int[] data) { `[ir}+S
sort(data, IMPROVED_QUICK); CLRdm^B
} SwMc pNo
private static String[] name={ XwaXdvmK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q(84+{>B
}; fE mr^R
&%J08l6
private static Sort[] impl=new Sort[]{ X'iWJ8
new InsertSort(), S"H2 7
new BubbleSort(), .?$gpM?i
new SelectionSort(), 4.t-i5
new ShellSort(), W'M*nR|xo
new QuickSort(), Ysv" 6b}
new ImprovedQuickSort(), vdwsJPFbc
new MergeSort(), Gk6iIK
new ImprovedMergeSort(), >z@0.pN]7
new HeapSort() jse&DQ
}; S)@j6(HC4
sQZhXaMa $
public static String toString(int algorithm){ 9G2FsM|,
return name[algorithm-1]; I; rGD^
} c]!V'#U
WH^%:4
public static void sort(int[] data, int algorithm) { a\*yZlXKs
impl[algorithm-1].sort(data); 5nx1i
} w``U=sfmV
>^3i|PB
public static interface Sort { Qo|\-y-#
public void sort(int[] data); PCtzl)
} k!Y, 63V=
7@W>E;go
public static void swap(int[] data, int i, int j) { H<+TR6k<
int temp = data; Xsa].
data = data[j]; cw <l{A
data[j] = temp; 3=oDQ&UFt
} dSHDWu&
} G18b$z