[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; ua]\xBWx
} (SgEt
int i1=l; \Dvl%:8
int i2=mid+1; /0B07B
for(int cur=l;cur<=r;cur++){ W~XV
if(i1==mid+1) D..{|29,:
data[cur]=temp[i2++]; c,#~L7
else if(i2>r) J~_L4*Jw
data[cur]=temp[i1++]; nUI63?
else if(temp[i1] data[cur]=temp[i1++]; Jcwh|w9D8
else g|&.v2 '
data[cur]=temp[i2++]; 9IS1.3
} l _kg3e4
} u4b3bH9U
"e1{V8 4
} jRv;D#Hp
?~VWW<lR
改进后的归并排序: B)j`}7O06
c]AKeq]
package org.rut.util.algorithm.support; B$}wF<`k7
8! |.H p
import org.rut.util.algorithm.SortUtil; EmtDrx4!(f
U~u6}s]:
/** >:Rt>po8|w
* @author treeroot z")3_5Br
* @since 2006-2-2 p0}+071o%
* @version 1.0 {#dp-5V
*/ 8k+q7
public class ImprovedMergeSort implements SortUtil.Sort { u%+6Mp[E
jQ.>2-;H9
private static final int THRESHOLD = 10; !uj!
Lu8%qcC
/* nhVK?
* (non-Javadoc) &X#x9|=&O
* .G5NGB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IEno.i\
*/ Z`-)1!
public void sort(int[] data) { ^F0k2pB
int[] temp=new int[data.length]; dvg;
mergeSort(data,temp,0,data.length-1); x*loACee.
} GsP@ B'
x*,q Rew
private void mergeSort(int[] data, int[] temp, int l, int r) { Hm+6QgCs
int i, j, k; ZXssvjWQV}
int mid = (l + r) / 2; 4*N@=v
if (l == r) bik] JIM
return; dUsJv
if ((mid - l) >= THRESHOLD) "xvV'&lQ
mergeSort(data, temp, l, mid); sUyCAKebRr
else 2-"Lxe65f
insertSort(data, l, mid - l + 1); 3oppV_^JdT
if ((r - mid) > THRESHOLD) /ctaAQDUh\
mergeSort(data, temp, mid + 1, r); |?;"B:0
else C;58z5*,
insertSort(data, mid + 1, r - mid); <eud#v
Y5h)l<P>B
for (i = l; i <= mid; i++) { ]HNT(w@
temp = data; *7xQp!w^
} >+A1 V[
for (j = 1; j <= r - mid; j++) { N8DiEB3~
temp[r - j + 1] = data[j + mid]; {Gk}3u/
} E5Snl#Gl\0
int a = temp[l]; Azq#}Oe)u
int b = temp[r]; |k7ts&2
for (i = l, j = r, k = l; k <= r; k++) { Q^1#xBd
if (a < b) { eu}:Wg2
data[k] = temp[i++]; i h`y0(<
a = temp; 7)8rc(58
} else { np'M4^E;
data[k] = temp[j--]; w{YtTZp3
b = temp[j]; JL]k:i^`A
} X_0{*!v8
} oSu|Yn
} y7;XOPm
AXNszS%4
/** +e\:C~2f28
* @param data Q?Bjq>
* @param l _Ssv:xc,
* @param i %b-;Rn
*/ U'sVs2sk6
private void insertSort(int[] data, int start, int len) { 0f=N3)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j-I6QUd
} 4Rrw8Bw
} `F-Dd4B
} *FLTz(T
} IJ #v"! D
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堆排序： X*>o9J45V
\DcC1W
package org.rut.util.algorithm.support; |j5AU
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import org.rut.util.algorithm.SortUtil; 654jS!
;K)?:
/** I).^,%>Z)
* @author treeroot wEo-a< (
* @since 2006-2-2 ]mO+<{{4X
* @version 1.0 jKb=Zkd
*/ 8&2gM
public class HeapSort implements SortUtil.Sort{ _,K>u6N&
H~_^w.P
/* (non-Javadoc) RqX4ep5j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6M<mOhp@}n
*/ R^u^y{ohr
public void sort(int[] data) { sxC{\iLY%
MaxHeap h=new MaxHeap(); S{"6PXzb
h.init(data); @|\s$L
for(int i=0;i h.remove(); gE6y&a
System.arraycopy(h.queue,1,data,0,data.length); *NwKD:o
} }07<(,0n
!g8.8(/t)
private static class MaxHeap{ i*cE
AVevYbucB
void init(int[] data){ 2fL88/'
this.queue=new int[data.length+1]; I8-&.RE
for(int i=0;i queue[++size]=data; QLpTz"H
fixUp(size); d=+Lv<
} /bNVgK`L5
} w_z^5\u0
a,0o{*(u$
private int size=0; ?w5nKpG#RI
)Ido|!]0d
private int[] queue; si mX
q2j}64o_S
public int get() { B'BbTI,
return queue[1]; }&C!^v o
} HU'`kimWb
[%)B%h`XGf
public void remove() { KbuGf$Bv
SortUtil.swap(queue,1,size--); gx>mKSzy
fixDown(1); 2G:{FY
} $RFu m'`5
file://fixdown G/RheH G
private void fixDown(int k) { <GFB'`L
int j; KAZkVL
while ((j = k << 1) <= size) { 7i|hlk;
if (j < size %26amp;%26amp; queue[j] j++; Ci#5@Q9#w
if (queue[k]>queue[j]) file://不用交换 S>ylAU;N
break; .pu`\BW>
SortUtil.swap(queue,j,k); Uf]Pd)D
k = j; t+)GB=C
} \tw#pk
} koWb@V]
private void fixUp(int k) { Y,pS/
while (k > 1) { Mb/6>
int j = k >> 1; PJ11LE
if (queue[j]>queue[k]) F0ivL`
break; 9q,JqB
SortUtil.swap(queue,j,k); |Nd.'|g,
k = j; MIyLQ
} v,.n/@s|X
} 1.d9{LO[-
MPEBinE?
} Nxs%~wZ
ThQEQ6y
} `zsk*W1GA
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SortUtil： @XG`D>%k
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package org.rut.util.algorithm; ?28GQyk4
\g[f4xAV
import org.rut.util.algorithm.support.BubbleSort; b%~3+c
import org.rut.util.algorithm.support.HeapSort; R\Ynn^w
import org.rut.util.algorithm.support.ImprovedMergeSort; ?yM/j7Xn
import org.rut.util.algorithm.support.ImprovedQuickSort; 2'^OtM,
import org.rut.util.algorithm.support.InsertSort; N4]6LA6x6
import org.rut.util.algorithm.support.MergeSort; Zz*mf+
import org.rut.util.algorithm.support.QuickSort; [6gHi.`p'
import org.rut.util.algorithm.support.SelectionSort; %Ja{IWz9L
import org.rut.util.algorithm.support.ShellSort; E,?aBRxy
8Carg~T@
/** @U.}Ei
* @author treeroot m=l3O:~J
* @since 2006-2-2 j8AR#
* @version 1.0 N{z(|2{A#
*/ P:h4
public class SortUtil { (Gk]<`d#N
public final static int INSERT = 1; G@I_6cE
public final static int BUBBLE = 2; T^H) lC#R
public final static int SELECTION = 3; K[;,/:Y
public final static int SHELL = 4; U[ O!&:6
public final static int QUICK = 5; ^EBM;&;7
public final static int IMPROVED_QUICK = 6; 3UtXxL&L`
public final static int MERGE = 7; y?4=u,{C
public final static int IMPROVED_MERGE = 8; Ecl7=-y
public final static int HEAP = 9; "7g8 d
V'hz1roe
public static void sort(int[] data) { !<^j!'2
sort(data, IMPROVED_QUICK); @DKl<F
} TV>R(D3T/
private static String[] name={ 8;BwzRtgT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `TR9GWU+B
}; "uERa(i
O*Pe[T5x'
private static Sort[] impl=new Sort[]{ R/FV'qy]
new InsertSort(), Ytnr$*5.
new BubbleSort(), Us~wv"L=UX
new SelectionSort(), QS?9&+JM|
new ShellSort(), mb6?$1j
new QuickSort(), [goPmVe+
new ImprovedQuickSort(), #"YWz)8
new MergeSort(), -ddatc|
new ImprovedMergeSort(), x=|@AFI
new HeapSort() {j4:.fD
}; w)SxwlW}
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public static String toString(int algorithm){ tJfN6
return name[algorithm-1]; bD[W~ku
} g#nsA(_L
JM9Q]#'t
public static void sort(int[] data, int algorithm) { -@?>nLQb
impl[algorithm-1].sort(data); bN%MT#X
} ) G&3V
e7AI&5Eg{
public static interface Sort { JV{!Ukuyp+
public void sort(int[] data); t7%Bv+Uo
} JKv4}bv
n&{N't
public static void swap(int[] data, int i, int j) { u"$HWB~@z
int temp = data; %ycT}Lu
data = data[j]; s"!}=kX
data[j] = temp; (:k`wh&
} ]-OkW.8d1
} =U|SK"oO