[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; 3w^W6hN)
} QPm[4Fd{G
int i1=l; (rFkXK4^J
int i2=mid+1; faOiNR7;h
for(int cur=l;cur<=r;cur++){ 4A+g-{d
if(i1==mid+1) 4D&L]eJ
data[cur]=temp[i2++]; Sfe[z=7S
else if(i2>r) $7YZ;=~B
data[cur]=temp[i1++]; P[fy
else if(temp[i1] data[cur]=temp[i1++]; |mMsU,*gB
else bIm4s
data[cur]=temp[i2++]; 2Pb+/1*ix
} kk5&lak2V
} PxYK)n9&
h GA2.{
} rn .qs
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改进后的归并排序: @7}XBg[pI
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package org.rut.util.algorithm.support; 9Qszr=C0
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import org.rut.util.algorithm.SortUtil; =w`Mc\o"
7=G6ao7
/** |6^a[x3/U
* @author treeroot q25p3
* @since 2006-2-2 2|7:`e~h
* @version 1.0 ="]lN
*/ |8E~C~d
public class ImprovedMergeSort implements SortUtil.Sort { zwUC L
Mq~E'g4#
private static final int THRESHOLD = 10; ZC2aIJ
:.=:N%3[
/* y9mV6.r
* (non-Javadoc) ], Bafz)4
* 2{RRaUoRb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t{UVX%b
*/ Q@}SR%p
public void sort(int[] data) { )xf(4
int[] temp=new int[data.length]; 6<@mBZ
mergeSort(data,temp,0,data.length-1); ,7:GLkj
} { 1~]}K2
[? "hmSJ
private void mergeSort(int[] data, int[] temp, int l, int r) { !Gnm<|.
int i, j, k; $m ;p@#n
int mid = (l + r) / 2; l`~$cK!
if (l == r) t>quY$}4
return; 6 wd
if ((mid - l) >= THRESHOLD) '{0O!y[H6
mergeSort(data, temp, l, mid); P'iX?+*
else g@x72$j
insertSort(data, l, mid - l + 1); <mP_K^9c
if ((r - mid) > THRESHOLD) 0Gj/yra9MO
mergeSort(data, temp, mid + 1, r); a1_ N~4r`
else N5l`Rq^K
insertSort(data, mid + 1, r - mid); ax5n}
@[joM*U
for (i = l; i <= mid; i++) { w}6~t\9D
temp = data; \>4>sCC
} UxMy8}w!y
for (j = 1; j <= r - mid; j++) { ommW
temp[r - j + 1] = data[j + mid]; ThP~k9-
} /V0Put
int a = temp[l]; ]u<U[l-w
int b = temp[r]; 4 dHGU^#WZ
for (i = l, j = r, k = l; k <= r; k++) { :*g$@T
if (a < b) { 5M>p%/
data[k] = temp[i++]; V}vL[=QFZ(
a = temp; /Gnt.%y&
} else { {{gd}g
data[k] = temp[j--]; K8KN<Q s]
b = temp[j]; E9k%:&]vd
} +z9BWo!{I
} |Zn;O6c#L5
} "1""1";
wY8Vc"
/** jCj8XM{c>
* @param data _[8JSw7
* @param l >9XG+f66E
* @param i >r)UDa+
*/ _s-X5xU
private void insertSort(int[] data, int start, int len) { Y,mo}X<>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OWz{WV.
} p\I3fI0i
} U(+QrC:
} ph)=:*A6&
} ?mV2|;
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堆排序： Te!eM{_$T
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package org.rut.util.algorithm.support; IecD41%
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import org.rut.util.algorithm.SortUtil; Gyy4)dP
^4JK4+!Zfq
/** W@GU;Nr
* @author treeroot [GM!@6U
* @since 2006-2-2 oT:wGBW
* @version 1.0 SANbg&$
*/ 8>|4iT
public class HeapSort implements SortUtil.Sort{ 8DD1wK\U~
#6y fIvap
/* (non-Javadoc) {?w*n_T.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9JMf T]
*/ *XDe:A
public void sort(int[] data) { 9]chv>dO)=
MaxHeap h=new MaxHeap(); W7s
h.init(data); <b4} B
for(int i=0;i h.remove(); _;x`6LM
System.arraycopy(h.queue,1,data,0,data.length); f[`&3+
} ~6u|@pnI
cWQ &zc
private static class MaxHeap{ ;eFV}DWW
zb~;<:<
void init(int[] data){ U/HF6=Wot
this.queue=new int[data.length+1]; vGH]7jht
for(int i=0;i queue[++size]=data; ELG{xN=o
fixUp(size); MjBI1|*
} Vl(id_~_
} 6P9#6mZ
[$>@f{:
private int size=0; ,DWq
\/wk!mWV@
private int[] queue; BD.l5~:
:hB6-CZkqN
public int get() { A[Ce3m
return queue[1]; &RS)U72
} ndBqXS
*!NW!,R
public void remove() { K^/.v<w
SortUtil.swap(queue,1,size--); fP;I{AiN~
fixDown(1); 0ly6 |:
} (t"|XSF
file://fixdown Vw.4;Zy(
private void fixDown(int k) { FAGi`X<L
int j; &"1_n]JO
while ((j = k << 1) <= size) { ls "Z4v(L6
if (j < size %26amp;%26amp; queue[j] j++; sV%=z}n=
if (queue[k]>queue[j]) file://不用交换 frQ=BV5%6
break; EN>a^B+!
SortUtil.swap(queue,j,k); 4dz Ym+vJm
k = j; Uu`}| &@i
} !}eq~3
} M.$=tuUL
private void fixUp(int k) { o9{1_7K
while (k > 1) { s}^W2
int j = k >> 1; |c$*Fa"A
if (queue[j]>queue[k]) DM,;W`|6%
break; Q\^BOdX^`
SortUtil.swap(queue,j,k); tnXW7ej^
k = j; tuo'Uk)
} :K \IS`
} zyK11
#)T'a
} I$TD[W
vMXn#eR
} 2{hG",JL
d)%l-jj9,
SortUtil： F9IPA%
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package org.rut.util.algorithm; o}D7 $6
MA 6uJT
import org.rut.util.algorithm.support.BubbleSort; {!4ZRNy(k
import org.rut.util.algorithm.support.HeapSort; t/]za4w/
import org.rut.util.algorithm.support.ImprovedMergeSort; Z 2uU'T
import org.rut.util.algorithm.support.ImprovedQuickSort; Hw#yw g
import org.rut.util.algorithm.support.InsertSort; Yk7^?W
import org.rut.util.algorithm.support.MergeSort; ~4S6c=:
import org.rut.util.algorithm.support.QuickSort; } f!wQxb
import org.rut.util.algorithm.support.SelectionSort; 7,{!a56zX
import org.rut.util.algorithm.support.ShellSort; 4tt=u]:
4 $)}d
/** b Sg]FBaW
* @author treeroot &3~R-$P
* @since 2006-2-2 TU2MG VYy
* @version 1.0 n>lQ:l~
*/ eYg0NEq{
public class SortUtil { iqTmgE-
public final static int INSERT = 1; HM\}C.u
public final static int BUBBLE = 2; i,y{*xBT
public final static int SELECTION = 3; aTLr%D:Ka
public final static int SHELL = 4; UXS+GAWU
public final static int QUICK = 5; f*[Uq0?
public final static int IMPROVED_QUICK = 6; J B !Q
public final static int MERGE = 7; DC$x}1
public final static int IMPROVED_MERGE = 8; (jh0cy}|]
public final static int HEAP = 9; B/EGaYH
cn ;2&
public static void sort(int[] data) { ;sSRv9Xb
sort(data, IMPROVED_QUICK); \D! I"mr
} g+k yvI7o
private static String[] name={ Ys%d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x1`Jlzrp,
}; Wc/B_F?2
Dd,]Y}P
private static Sort[] impl=new Sort[]{ [4}U*\/>C
new InsertSort(), *_uGzGB&G
new BubbleSort(), ];Bk|xJ/>
new SelectionSort(), qS[nf>"
new ShellSort(), ,5|@vW2@u
new QuickSort(), 6)3pnhG9
new ImprovedQuickSort(), |=Pw-uk
new MergeSort(), ^+dL7g?+
new ImprovedMergeSort(), o l+*Oe
new HeapSort() Oyjhc<6
}; eKqo6P:#f
f:A1j\A?
public static String toString(int algorithm){ 5bprhq-7
return name[algorithm-1]; _ Av_jw`m
} 4p(\2?B%f
u,Cf4H*xS
public static void sort(int[] data, int algorithm) { *2I@_b6&
impl[algorithm-1].sort(data); Z1+1>|-iW
} S?(/~Vb%
vQ DlS1L
public static interface Sort { kAk+Sq^n
public void sort(int[] data); cfW;gFf
} k`,>52
flU?6\_UC
public static void swap(int[] data, int i, int j) { wb-_CQ
int temp = data; Cy\! H&0wg
data = data[j]; 1&YkRCn0
data[j] = temp; pU@&-
} $C&E3 'O
} SfwNNX%