[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; uSQRI9/ir2
} @;;3B
int i1=l; Ndmki 7A
int i2=mid+1; CT{mzC8
for(int cur=l;cur<=r;cur++){ ;x,yGb`
if(i1==mid+1) ^J~5k,7jX
data[cur]=temp[i2++]; L+K,Y:D!W
else if(i2>r) Tji*\<?
data[cur]=temp[i1++]; ,B2p\
else if(temp[i1] data[cur]=temp[i1++]; L5DeLF+
else >v#6SDg
data[cur]=temp[i2++]; e5 N$+P"
} tXfXuHa
} JIatRc?g
!(A<
} gkhmQd
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改进后的归并排序: ^i[bo3
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package org.rut.util.algorithm.support; aE(DNeG-H
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import org.rut.util.algorithm.SortUtil; P1_6:USBM
&[b(Lx|i
/** t9~Y ?
* @author treeroot s7?d_+O
* @since 2006-2-2 #KUNZW
* @version 1.0 XcFu:B
*/ weH;,e*r
public class ImprovedMergeSort implements SortUtil.Sort { N1fPutl$a
\%}w7J;
private static final int THRESHOLD = 10; Sc14F Fs
0JE*|CtK
/* .k!<Oqa
* (non-Javadoc) q~. .Z Y`7
* ,8[R0wsBaz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s{uSU1lQn
*/ LkyT4HC8n
public void sort(int[] data) { sW]>#e
int[] temp=new int[data.length]; kF-7OX0)
mergeSort(data,temp,0,data.length-1); o%E-K=a
} E>c*A40=.n
D4jZh+_|S
private void mergeSort(int[] data, int[] temp, int l, int r) { lw`$(,
int i, j, k; m^$KDrkD
int mid = (l + r) / 2; K |^OnM
if (l == r) &8HJ4Vj2
return; +8}8b_bgH
if ((mid - l) >= THRESHOLD) *RD<*l
mergeSort(data, temp, l, mid); ~--b#o{
else 3[UaK`/1C
insertSort(data, l, mid - l + 1); /"@k_[O
if ((r - mid) > THRESHOLD) 9]gV#uF
mergeSort(data, temp, mid + 1, r); #X"fm1
else m$`4.>J
insertSort(data, mid + 1, r - mid); ffy,ds_7
g?rK&UTU
for (i = l; i <= mid; i++) { Ri/D>[
temp = data; ,l#f6H7p
} 9Xe|*bT
for (j = 1; j <= r - mid; j++) { af_bG;
temp[r - j + 1] = data[j + mid]; QfV:&b`
} %Vb~}sT:
int a = temp[l]; ~? n)/i("
int b = temp[r]; R[W'LRh~:1
for (i = l, j = r, k = l; k <= r; k++) { DD'RSV5]
if (a < b) { G&q@B`I
data[k] = temp[i++]; zB8J|uG
a = temp; .Fx-$Yqy
} else { ~.Er
data[k] = temp[j--]; \iH\N/
b = temp[j]; .2 }5Dc,eR
} ? @- t.N
} 9gFfbvd
} 2,rjy|R`
7I0K= 'D7
/** &;[0.:;
* @param data w|U7pUz
* @param l IAd[_<9D
* @param i _SrkR7
*/ NKYHJf2?x
private void insertSort(int[] data, int start, int len) { QV8;c^EZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DI\^&F)3T2
} & &:ZY4`
} 7&2CLh
} /h,-J8[
} 2NF#mWZ(s
qf*e2"~v
堆排序： ]#\/1!W
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package org.rut.util.algorithm.support; Uc0Sb
&ER,;^H`6
import org.rut.util.algorithm.SortUtil; o(YF`;OhvS
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/** 6oLZH6fG
* @author treeroot to#T+d.(v
* @since 2006-2-2 x8Nij:K#
* @version 1.0 i}kMo@
*/ {^@qfkZz^
public class HeapSort implements SortUtil.Sort{ b/UjKNf@
jN%+)Kj0C)
/* (non-Javadoc) L[Y|K%;~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J';XAB }
*/ cJ#%OU3p
public void sort(int[] data) { !}J19]\
MaxHeap h=new MaxHeap(); R 5Cy%
h.init(data); 8O.5ML{
for(int i=0;i h.remove(); `cqZ;(^
System.arraycopy(h.queue,1,data,0,data.length); J1d|L|M
} 5wI j:s
&P(vm@*
private static class MaxHeap{ 9=G dj!L
*cc|(EM
void init(int[] data){ 3&Fqd
this.queue=new int[data.length+1]; :i]g+</
for(int i=0;i queue[++size]=data; Cgn@@P5ZC
fixUp(size); oI9-jW
} u\@L|rh
} h<FEe~
[zhcb+^5l
private int size=0; EakS(Q?
oT^r
private int[] queue; 9F|e.
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public int get() { y0 qq7Dmu
return queue[1]; (^= Hq'D
} 0@2pw2{Ru
3L%g2`
public void remove() { &:Sb$+z
SortUtil.swap(queue,1,size--); }9>X M
fixDown(1); D;OR?NdgvW
} ;/ao3Q
file://fixdown WyJXT.
private void fixDown(int k) { mNApFwZ
int j; R,ddH[3
while ((j = k << 1) <= size) { W'<cAg?
if (j < size %26amp;%26amp; queue[j] j++; Z.mnD+{
if (queue[k]>queue[j]) file://不用交换 'W|@d8}h
break; 2s8(r8AI
SortUtil.swap(queue,j,k); nuX W/7M
k = j; \ /6m
} eO=!(
} P7p'j
private void fixUp(int k) { o)IcAqN$H
while (k > 1) { 1@A*Jj[R%
int j = k >> 1; 0 ;ov^]
if (queue[j]>queue[k]) LdYaJh~h
break; 1Qgd^o:d
SortUtil.swap(queue,j,k); 0-w^y<\
k = j; ti9cfv>
} [8C6%n{W
} $;t#pN/`
Ss{
} m1lfC
"rIBy
} o'nrLI(t
hy|X(m
SortUtil： JPTVZ
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package org.rut.util.algorithm; 1MzOHE
me`(J y<
import org.rut.util.algorithm.support.BubbleSort; $[P>nRhW
import org.rut.util.algorithm.support.HeapSort; zwKm;;v8
import org.rut.util.algorithm.support.ImprovedMergeSort; iiZK^/P$
import org.rut.util.algorithm.support.ImprovedQuickSort; Q{Lsr,
import org.rut.util.algorithm.support.InsertSort; IRQ3>4hI
import org.rut.util.algorithm.support.MergeSort; u3H2\<
import org.rut.util.algorithm.support.QuickSort; `?L-{VtM3*
import org.rut.util.algorithm.support.SelectionSort; $MG. I[h
import org.rut.util.algorithm.support.ShellSort; `;R|SyrX
-/#tQ~{gs
/** <ArP_! `3
* @author treeroot kVZ5>D$
* @since 2006-2-2 g1`/xJz|
* @version 1.0 @Q atgYu
*/ #/9(^6f:
public class SortUtil { s(I7}oRWsL
public final static int INSERT = 1; Cz_chK4
public final static int BUBBLE = 2; __V6TDehJ$
public final static int SELECTION = 3; ;zO(bj>
public final static int SHELL = 4; hrRX=
public final static int QUICK = 5; A fctycQ-
public final static int IMPROVED_QUICK = 6; KCed!OJ+
public final static int MERGE = 7; S,,3h0$X
public final static int IMPROVED_MERGE = 8; 3f:I<S7
public final static int HEAP = 9; U;:,$]+
+xlxhF
public static void sort(int[] data) { ~4iIG}Y<
sort(data, IMPROVED_QUICK); Th%1eLQ
} Tl3{)(ezx
private static String[] name={ 0R2 AhA#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0Fh*8a}?b
}; 5!*5mtI
z,oqYU\:
private static Sort[] impl=new Sort[]{ ?%h JZm;
new InsertSort(), g~@0p7]Y
new BubbleSort(), {P#&e>)v{
new SelectionSort(), RfB""b8]=
new ShellSort(), =#<hT s
new QuickSort(), ?s5zTT0U>$
new ImprovedQuickSort(), RfwTqw4@
new MergeSort(), q'?:{k$%
new ImprovedMergeSort(), 2eu`X2IBcT
new HeapSort() MNiu5-g5
}; R6Cm:4m}I
Tf"DpA!_
public static String toString(int algorithm){ [,a O*7N
return name[algorithm-1]; wDZFOx0#8
} G1~|$X@@
k[Iwxl;/
public static void sort(int[] data, int algorithm) { fwRlqfi
impl[algorithm-1].sort(data); L/GM~*Xp(O
} <P5;8
&hba{!`y
public static interface Sort { WL}6YSC
public void sort(int[] data); 5e,Dk0d
} W&4`eB/4}
N)h>Ie
public static void swap(int[] data, int i, int j) { @X/S h:
int temp = data; l#o43xr
data = data[j]; 5 ^iU1\(L
data[j] = temp; B<[;rk
} E!VAA=
} asW1GZO