[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; -Bo~"q
} TflS@Z7C
int i1=l; 9g &Ch9-/
int i2=mid+1; BZ;}ROmqk
for(int cur=l;cur<=r;cur++){ Ym.l@(
if(i1==mid+1) Rs F3#H
data[cur]=temp[i2++]; tkN3BQ
else if(i2>r) NC.P2^%
data[cur]=temp[i1++]; QYTTP6 Gz+
else if(temp[i1] data[cur]=temp[i1++]; yEUNkZ5^
else 4%fN\f
data[cur]=temp[i2++]; y{`(|,[
} @>Ghfh>~D
} 8yWu{'G
5\w=(c9A
} .p(6' TYnI
mo#0q&ZQ
改进后的归并排序: HA9Nr.NqC@
=tc`:!$
package org.rut.util.algorithm.support; _:gGD8
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import org.rut.util.algorithm.SortUtil; <duBwkiG
/iTUex7T
/** >1r[]&8
* @author treeroot YNg\"XjJM<
* @since 2006-2-2 hX8gV~E=y
* @version 1.0 1t[;`iZ
*/ -Y8ks7
public class ImprovedMergeSort implements SortUtil.Sort { rO(TG
T018)WrhL
private static final int THRESHOLD = 10; c BHL,
,%?; \?b%h
/* WS1&3mOd
* (non-Javadoc) prlyaq;4
* G/fP(o-Wd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c+8>EU AW
*/ Oj"pj:fB
public void sort(int[] data) { !u53 3
int[] temp=new int[data.length]; {\svV 0)~
mergeSort(data,temp,0,data.length-1); -7k|6"EwM
} K$<`4#i
}$Hs;4|
private void mergeSort(int[] data, int[] temp, int l, int r) { GX7 eRqz>
int i, j, k; 2q-:p8
int mid = (l + r) / 2; bB;~,W&E1
if (l == r) Q7uAf3
return; *>aZc::
if ((mid - l) >= THRESHOLD) \)^,PA3
mergeSort(data, temp, l, mid); 0q[p{_t`
else < QDr,Hj
insertSort(data, l, mid - l + 1); \!UF|mD^tG
if ((r - mid) > THRESHOLD) obAs<nk
mergeSort(data, temp, mid + 1, r); d; mmM\3]
else 8! H8[J
insertSort(data, mid + 1, r - mid); FJa[ToZ4+
U]V3DDN
for (i = l; i <= mid; i++) { @V* ju
temp = data; `26V`%bPkr
} 0'yG1qG
for (j = 1; j <= r - mid; j++) { S,*{q(
temp[r - j + 1] = data[j + mid]; NK7H,V}T
} c<=`<!FS[
int a = temp[l]; | V.S.'
int b = temp[r]; xb =8t!
for (i = l, j = r, k = l; k <= r; k++) { 5JBB+g
if (a < b) { >JKnGeF
data[k] = temp[i++]; Gur8.A;Y
a = temp; tt6. jo
} else { yhcNE8mkQ/
data[k] = temp[j--]; c*x J=Gz6d
b = temp[j]; xSpMyXrQ
} g08*}0-k
} qri}=du&F
} Ws-6W!Ib%
.'t (-eT,
/** 2BoFyL*
* @param data bz,Da
* @param l O.@g/05C
* @param i ,wtFs!8
*/ 5^/,aI
private void insertSort(int[] data, int start, int len) { E4sn[DO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J)9 AnGWe
} "/ tUA\=j
} 9W{,=.%MX$
} CfPXn0I
} V";mWws+?#
K#qoR/:
堆排序： &`9j)3^J.
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package org.rut.util.algorithm.support; z.eJEK
3R5K}ZBi%
import org.rut.util.algorithm.SortUtil; *j|/2+pq
iYk':iv}S
/** x96qd%l/
* @author treeroot f{)+-8
* @since 2006-2-2 +7| [b
* @version 1.0 /xl4ohL$a
*/ .)LZ`Ge3F
public class HeapSort implements SortUtil.Sort{ 9{_8cpm4
b;S6'7Jf9
/* (non-Javadoc) N]B)Fb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VZ\O9lD
*/ ^oS$>6|
public void sort(int[] data) { uQH%.A
MaxHeap h=new MaxHeap(); 2dHM
h.init(data); u?Fnlne4@
for(int i=0;i h.remove(); Oo FgQEr@
System.arraycopy(h.queue,1,data,0,data.length); >vUB%OLyP
} }5Yj
#v{Y=$L
private static class MaxHeap{ T"n{WmVQ
yC0C`oC
void init(int[] data){ JZ`>|<W
this.queue=new int[data.length+1]; 8O,?|c=>
for(int i=0;i queue[++size]=data; "hL9f=w
fixUp(size); {DU"]c/S
} q_cC7p6t
} ~mtTsZc
~j=xiP
private int size=0; ):e+dt
J!rY 6[t
private int[] queue; ?#d6i$
\I?w)CE@R
public int get() { {}V$`L8
return queue[1]; 7; p4Wg7k}
} `YPe^!`$
]JH64~a
public void remove() { 9/#0?(K8
SortUtil.swap(queue,1,size--); 1o8wy_eSs
fixDown(1); 0s1'pA'
} 2;8Xz6T
file://fixdown $30oc Tt{
private void fixDown(int k) { W7t >&3l
int j; |~z3U>
while ((j = k << 1) <= size) { Odm#wL~E
if (j < size %26amp;%26amp; queue[j] j++; IE2CRBfs
if (queue[k]>queue[j]) file://不用交换 YQ; cJ$
break; N1%p"(
SortUtil.swap(queue,j,k); f0vJm
k = j; WP}ixcq#
} C@1CanL@3
} Bp :~bHf
private void fixUp(int k) { m#JI!_~!
while (k > 1) { g6WPPpqus
int j = k >> 1; X2qv^G,
if (queue[j]>queue[k]) HN{zT&
break; QIQfI05
SortUtil.swap(queue,j,k); 2Zy_5>~
k = j; qpI]R
} nP<S6:s:
} S.{fDcM
q(78fZ *X
} 3QW_k5o
]fZ<`w8u}
} -OrR $w|e
wxE?3%.j\
SortUtil： 'TL2%T/)t
k'Gw!p}
package org.rut.util.algorithm; %<ic%gt`#
v9=}S\=Cd
import org.rut.util.algorithm.support.BubbleSort; s.VA!@F5
import org.rut.util.algorithm.support.HeapSort; /be=u@KV
import org.rut.util.algorithm.support.ImprovedMergeSort; n#4Gv|{XMD
import org.rut.util.algorithm.support.ImprovedQuickSort; I.1D*!tz
import org.rut.util.algorithm.support.InsertSort; Y6A;AmM8
import org.rut.util.algorithm.support.MergeSort; Z&Ue|Z4Qt
import org.rut.util.algorithm.support.QuickSort; +c--&tBo
import org.rut.util.algorithm.support.SelectionSort; iwU[6A
import org.rut.util.algorithm.support.ShellSort; =Q-k'=6\
);Z]SGd
/** Ry?4h\UX5
* @author treeroot e # 5BPI
* @since 2006-2-2 P>(P2~$Y"
* @version 1.0 *:g_'K"+
*/ gyev5txn
public class SortUtil { Z, T#,
public final static int INSERT = 1; y%S})9
public final static int BUBBLE = 2; " !-Kd'V
public final static int SELECTION = 3; }#Doy{T
public final static int SHELL = 4; v8m`jxII64
public final static int QUICK = 5; ?sXG17~Bm
public final static int IMPROVED_QUICK = 6; =\Iu$2r`
public final static int MERGE = 7; z<B CLP
public final static int IMPROVED_MERGE = 8; ='}#`',
public final static int HEAP = 9; RP! X8~8
)u*^@Wo
public static void sort(int[] data) { GKZN}bOm\
sort(data, IMPROVED_QUICK); *)'Vvu<
} [k$efwJ
private static String[] name={ oZN'HT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?'eq",c#4N
}; xr[Vp
s9O2k}]
private static Sort[] impl=new Sort[]{ >zs5s
new InsertSort(), jAC78n,Fi@
new BubbleSort(), _okWQvdH
new SelectionSort(), (?>cn_m
new ShellSort(), KxIyc7.
new QuickSort(), Y.sz|u 1
new ImprovedQuickSort(), ~}'F887f
new MergeSort(), SJk>Jt=
new ImprovedMergeSort(), A_R!uRD8-
new HeapSort() ys8Q.oBv_`
}; )&,{?$.
Qs9OC9X1
public static String toString(int algorithm){ &eQJfc\a
return name[algorithm-1]; 20tO#{Li
} F PR`tE
UV AJxqz%}
public static void sort(int[] data, int algorithm) { z)-c#F@%
impl[algorithm-1].sort(data); I4=Xb^Ux
} =rFN1M/n{E
&;c>O
public static interface Sort { )h_8vO2
public void sort(int[] data); (dqCa[
} =-#G8L%Q
QR0(,e$Dl
public static void swap(int[] data, int i, int j) { h/)_) r.x
int temp = data; asVX82<
data = data[j]; hH>``gK
data[j] = temp; G$bJ+
} !yJICjXj
} wRvb8F0