[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; 7^; OjO@8
} )&9=)G
int i1=l; N!v@!z9Mu
int i2=mid+1; ArEpH"}@
for(int cur=l;cur<=r;cur++){ `8-aHPF-
if(i1==mid+1) 6?lg 6a/eO
data[cur]=temp[i2++]; ^Pf&C0xXv
else if(i2>r) Fv: %"P^
data[cur]=temp[i1++]; h<M7[p=
else if(temp[i1] data[cur]=temp[i1++]; 98]t"ny [
else 0 mQ3P.9
data[cur]=temp[i2++]; HB}gn2.1&
} @b/2'
} KH7]`CU
KCFwO'
} mx[^LaR>v
qh'BrYu*
改进后的归并排序: JA}'d7yEa
? 1{S_
package org.rut.util.algorithm.support; @Otc$hj
KCu6:)6'
import org.rut.util.algorithm.SortUtil; ^ZlV1G;/W@
-7$'* V9$
/** {q)B@#p
* @author treeroot JXAyF6 $
* @since 2006-2-2 zJ:r0Bt
* @version 1.0 &>jkfG
*/ C{Ug ?hVP
public class ImprovedMergeSort implements SortUtil.Sort { U{_s1
7`/qL "
private static final int THRESHOLD = 10; CJOl|"UyJ
]aRD6F:L
/* qWpCe*C
* (non-Javadoc) v6VhXV6$|
* 8_m9CQ6 i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tb{{oxa,k
*/ QT$1D[>
public void sort(int[] data) { 55DzBV
int[] temp=new int[data.length]; Vr1|%*0Tv
mergeSort(data,temp,0,data.length-1); >l1Yhxd_0*
} IpJv\zH7
iq:[+
private void mergeSort(int[] data, int[] temp, int l, int r) { AL7O-D
int i, j, k; O-5U|wA
int mid = (l + r) / 2; hyKg=Foq
if (l == r) Zsogx}i-
return; 3R*@m
if ((mid - l) >= THRESHOLD) X-,y[ )
mergeSort(data, temp, l, mid); LwPM7S~ *
else cv4M[]U~
insertSort(data, l, mid - l + 1); 2S6EDXc
if ((r - mid) > THRESHOLD) =.oWguzu
mergeSort(data, temp, mid + 1, r); uq%3;#[0
else Nj_sU0Dt
insertSort(data, mid + 1, r - mid); C<t>m_t9
m#$za7
for (i = l; i <= mid; i++) { }?J5!X
temp = data; RM1uYFs<
} &] 6T^.
for (j = 1; j <= r - mid; j++) { --YUiNhh
temp[r - j + 1] = data[j + mid]; mJ>99:W+
} /&:9VMMj
int a = temp[l]; .K1E1Z_
int b = temp[r]; BDRVT Y(s
for (i = l, j = r, k = l; k <= r; k++) { Vk_&W.~
if (a < b) { t)Q@sKT6
data[k] = temp[i++]; ('-}"3
a = temp; X9A[
} else { |a$w;s>\
data[k] = temp[j--]; Z{4aGp*
b = temp[j]; AdW2o|Uap
} rOHW
} TQd FC\@f"
} Q|KD/s??
&]F|U3
/** idS RWa
* @param data QeJ.o.m{
* @param l SzlfA%4+GR
* @param i !#:$u=
*/ !TL}~D:J
private void insertSort(int[] data, int start, int len) { K('lH-3wS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 51opP8
} rY?F6'}
} >MWpYp
} ynbpewaa
} P&3/nL$9N
_L'cyH.cn
堆排序： ;u};&sm
&9_\E{o%]
package org.rut.util.algorithm.support; <o7#?AcPu
yXV|4
import org.rut.util.algorithm.SortUtil; (g/X(3
5[2.5/
/** 50GYL5)q
* @author treeroot O;e8ft '|
* @since 2006-2-2 e_k _ty`
* @version 1.0 lhA s!\F
*/ 9>&tMq
public class HeapSort implements SortUtil.Sort{ QcG5PV
EhPVK6@
/* (non-Javadoc) .hlQ?\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <S8W~wC
*/ o+_/)c
public void sort(int[] data) { iQzX-a|4]
MaxHeap h=new MaxHeap(); T[XP\!z]B!
h.init(data); \_Kt6=
for(int i=0;i h.remove(); 9X$#x90
System.arraycopy(h.queue,1,data,0,data.length); uWB:"&!^
} T E&Q6
vMX6Bg8
private static class MaxHeap{ n*i'vtQ8
ow+Dd[i
void init(int[] data){ EdAR<VfleA
this.queue=new int[data.length+1]; 3hXmYz(
for(int i=0;i queue[++size]=data; b;J0'o^G|
fixUp(size); hHc^ZA
} RQpIBsj
} 2WPF{y%/
i$JG^6,O
private int size=0; ]fADaw-R
rbK#a)7
private int[] queue; nKh%E-c
<duBwkiG
public int get() { /iTUex7T
return queue[1]; >1r[]&8
} B221}t
|)?aH2IL
public void remove() { KZ!N{.Jk
SortUtil.swap(queue,1,size--); 1t[;`iZ
fixDown(1); fATA%eA8;
} H6ky)kF&
file://fixdown &V#zkW
private void fixDown(int k) { {yHB2=nI
int j; 0^&(u:~
while ((j = k << 1) <= size) { uspkn1-
if (j < size %26amp;%26amp; queue[j] j++; ;c X^8;F0
if (queue[k]>queue[j]) file://不用交换 [-E{}FL|
break; OY^n0Zof,
SortUtil.swap(queue,j,k); ^%5~;
k = j; J+@MzkpK
} i.&Kpw9;m
} XSp x''l
private void fixUp(int k) { jom}_
while (k > 1) { GSGyF
int j = k >> 1; hC|5e|S
if (queue[j]>queue[k]) [%7;f|p?
break; NMl ?Y uEv
SortUtil.swap(queue,j,k); K_AtU/
k = j; c?.r"5#
} k=T-L
} ]g>m?\'n
<+T\F;
} *K+jsVDY
0q[p{_t`
} N)y^</Ya
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SortUtil： ]&C:>
FQk_#BkK
package org.rut.util.algorithm; Mhb '^\px
H@%7\g,`
import org.rut.util.algorithm.support.BubbleSort; vo(g0Au)
import org.rut.util.algorithm.support.HeapSort; ?qg^WDs$
import org.rut.util.algorithm.support.ImprovedMergeSort; bkr~13S{+
import org.rut.util.algorithm.support.ImprovedQuickSort; qGpP,
import org.rut.util.algorithm.support.InsertSort; I|g@W_
import org.rut.util.algorithm.support.MergeSort; mUrS&&fu8
import org.rut.util.algorithm.support.QuickSort; ?w]"~
import org.rut.util.algorithm.support.SelectionSort; A6^p}_
import org.rut.util.algorithm.support.ShellSort; ?kL|>1TY
1V|< A
/** ( zn_8s
* @author treeroot 5q5 )uv"
* @since 2006-2-2 "UQr:/
* @version 1.0 Gur8.A;Y
*/ V[o7Jr~
public class SortUtil { aF&r/j+}o
public final static int INSERT = 1; +{,N X
public final static int BUBBLE = 2; a>o"^%x
public final static int SELECTION = 3; KTG:I@|C
public final static int SHELL = 4; k4qLB1&,
public final static int QUICK = 5; z5XYpi_;[
public final static int IMPROVED_QUICK = 6; _M8G3QOx
public final static int MERGE = 7; Z/2,al\
public final static int IMPROVED_MERGE = 8; 3]O`[P,*%
public final static int HEAP = 9; IL~]m?'V(
/S:w&5e
public static void sort(int[] data) { MU_!&(X_
sort(data, IMPROVED_QUICK); S}oG.r 9
} )-bD2YA{
private static String[] name={ 5h`m]#YEG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NuC-qG#
}; rNxrQ
K\RWC4
private static Sort[] impl=new Sort[]{ Pm$F2YrO3
new InsertSort(), #4vV%S
new BubbleSort(), `Y\gSUhzS
new SelectionSort(), yGba
new ShellSort(), :3f-9aRC!
new QuickSort(), S~+O`y^
new ImprovedQuickSort(), !]$V9F{K
new MergeSort(), WGH%92
new ImprovedMergeSort(), U7^7/s/.
new HeapSort() i&'#+f4t
}; 't +"k8
9@:BK;Fi
public static String toString(int algorithm){ QCeMKjCmY
return name[algorithm-1]; JB&G~7Q85
} H_VEPp,T
PT3>E5`Nu
public static void sort(int[] data, int algorithm) { CQ@LmTW[
impl[algorithm-1].sort(data); 2]L=s3
} (C,e6r Y
U(U@!G)
public static interface Sort { %tT"`%(+
public void sort(int[] data); Z;ZuS[ZA
} T>d\%*Q+B
C">`' G2
public static void swap(int[] data, int i, int j) { 3(1]FKZtt
int temp = data; b6 $,Xh
data = data[j]; T!MZ+Ph`F
data[j] = temp; d; 9*l!CF
} x>}B#
} )VNM/o%Q