[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; IYC#H}
} 6df&B .gg
int i1=l; f__WnW5h
int i2=mid+1; r1?FH2Ns
for(int cur=l;cur<=r;cur++){ Qz$Dv@*y\
if(i1==mid+1) wx'Tv
data[cur]=temp[i2++]; ty=?SZF
else if(i2>r) 2g545r.
data[cur]=temp[i1++]; \<>%_y'/)h
else if(temp[i1] data[cur]=temp[i1++]; a<36`#N
else z=pV{'
data[cur]=temp[i2++]; .T X& X
} oh)l\
} UAO#$o(
oU5mrS.7M!
} W"@lFUi
^*W<$A_
改进后的归并排序: U.0/r!po
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package org.rut.util.algorithm.support; }}Uv0g8D
*[YN|
import org.rut.util.algorithm.SortUtil; 1"6k5wrIA
<TuSU[]
/** ,p1]_D&
* @author treeroot ml2z
* @since 2006-2-2 &3?yg61Ag
* @version 1.0 sYgnH:t X
*/ )5OU!c
public class ImprovedMergeSort implements SortUtil.Sort { }w8AnaC
aH"c0A
private static final int THRESHOLD = 10; ?d)|vX3Uf
?{IvA:
/* jU~%5R
* (non-Javadoc) KYW1<Wcp
* Q~{@3<yEI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F'*&-l
*/ s~w+bwr
public void sort(int[] data) { L,/i%-J3c
int[] temp=new int[data.length]; #|i{#~gxM
mergeSort(data,temp,0,data.length-1); _4]dPk#^
} l d9#4D[#
t1^96@m^
private void mergeSort(int[] data, int[] temp, int l, int r) { Xlw=R2`)~
int i, j, k; *p!dd?8
int mid = (l + r) / 2; Z`KmH.l!
if (l == r) mm`3-F|
return; Tq8r SZi
if ((mid - l) >= THRESHOLD) N9<eU!4>
mergeSort(data, temp, l, mid); uHCgIR l>
else t}gqk'
insertSort(data, l, mid - l + 1); R<Tzt'z
if ((r - mid) > THRESHOLD) bb/MnhB
mergeSort(data, temp, mid + 1, r); A'EA!
else <`qo*__1
insertSort(data, mid + 1, r - mid); .D`#a
C%>7mz-v5
for (i = l; i <= mid; i++) { M(jH"u&f
temp = data; w(-n1oSo
} $)~]4n=
for (j = 1; j <= r - mid; j++) { x6tY _lzJ
temp[r - j + 1] = data[j + mid]; !W7ekPnK
} K gX)fj
int a = temp[l]; e8.bH#
int b = temp[r]; q4N$.hpb
for (i = l, j = r, k = l; k <= r; k++) { 7 '/&mX>
if (a < b) { kv b-=
data[k] = temp[i++]; 0k 8SDRWU
a = temp; $z]l4Hj
} else { +pm8;&
data[k] = temp[j--]; F o6U"
b = temp[j]; Of=z!|l2
} OHo0W)XUU
} s qKkTG3
} {IvCe0`
R[;Z<K\Nn?
/** 9g"H9)EZ^
* @param data ]Ox.6BKjDP
* @param l NM Ajt>t
* @param i zOw]P6Gk
*/ 8hg(6 XUG
private void insertSort(int[] data, int start, int len) { z wW9>Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z}wAh|N-
} VJaL$Wv)H
} \zwb>^
} L\[jafb_`
} "/"k50%
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堆排序： Z5=!R$4
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package org.rut.util.algorithm.support; |&Q=9H*e
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import org.rut.util.algorithm.SortUtil; ]Y?$[+Y
dp"w=~53
/** #p>PNW-
* @author treeroot 9P$'ON'"
* @since 2006-2-2 e1-=|!U7#
* @version 1.0 y=Hl~ev`9
*/ ($TxVFNT
public class HeapSort implements SortUtil.Sort{ z6qC6Ck|
&.,OvVAo
/* (non-Javadoc) W8^gPW*c5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g:g>;"B O
*/ "$&F]0
public void sort(int[] data) { "<WSEs
MaxHeap h=new MaxHeap(); 2h!3[{M\
h.init(data); ?H`LrL/k
for(int i=0;i h.remove(); V1G]LM
System.arraycopy(h.queue,1,data,0,data.length); !QovpO">z
} Y>+D\|%Q
c#DTL/8"DO
private static class MaxHeap{ ln.~>FO
4\?B,!
void init(int[] data){ o%.cQo=v*
this.queue=new int[data.length+1]; Ow I?(ruL'
for(int i=0;i queue[++size]=data; 9[! Hz)|X
fixUp(size); rdRX
} ".u?-xcbJ
} 0AEs+=
aZRgd^4
private int size=0; ol\IT9Zb~
=bzTfki
private int[] queue; %WNy=V9txp
N?XN$hwdZ
public int get() { ,]MX&]
return queue[1]; mR^D55k
} bCF63(0
a srkuAS
public void remove() { 4$^=1ax
SortUtil.swap(queue,1,size--); K02./ut-
fixDown(1); 2gGJ:,RC$
} cg~FW2Q
file://fixdown U uysG\
private void fixDown(int k) { ;,1i,?
int j; k|V{jBG"@
while ((j = k << 1) <= size) { 580t@?
if (j < size %26amp;%26amp; queue[j] j++; b} *cw2
if (queue[k]>queue[j]) file://不用交换 +CkK4<dF
break; q)[gVL
SortUtil.swap(queue,j,k); 9&tV#=s
k = j; J}x5Ko@
} Xw%z#6l
} -<sXvn
private void fixUp(int k) { x>@UqUJV
while (k > 1) { VtVnht1
int j = k >> 1; &~&i >
if (queue[j]>queue[k]) }oG&zw
break; :\[F=
SortUtil.swap(queue,j,k); + y^s 6j}
k = j; w-2]69$k
} pkoHi'}}$
} ^:],JN k
P7o6B,9
} ,P|PPx%@
V)`?J)
} _#_Ab8#
+G~b-}
SortUtil： #k6;~
X[w9~t$\
package org.rut.util.algorithm; -zkB`~u_
QUNsS9
import org.rut.util.algorithm.support.BubbleSort; Nl+2m4
import org.rut.util.algorithm.support.HeapSort; <L-L}\-I"
import org.rut.util.algorithm.support.ImprovedMergeSort; P(4[<'HO
import org.rut.util.algorithm.support.ImprovedQuickSort; O ?4V($
import org.rut.util.algorithm.support.InsertSort; Q,$x6YwE
import org.rut.util.algorithm.support.MergeSort; ;i]cmy
import org.rut.util.algorithm.support.QuickSort; R Q8okA
import org.rut.util.algorithm.support.SelectionSort; uO6_lOT9n
import org.rut.util.algorithm.support.ShellSort; S8y4 p0mV
im'0^
/** Ov9.qNT
* @author treeroot NF.SGga
* @since 2006-2-2 "*0 szz'
* @version 1.0 $=bN=hE
*/ pUmB h
public class SortUtil { yE7pCgXt
public final static int INSERT = 1; Np<Aak
public final static int BUBBLE = 2; ^Z!W3q Q
public final static int SELECTION = 3; I/tzo(r
public final static int SHELL = 4; W+#?3s[FV
public final static int QUICK = 5; @MM|.# ~T
public final static int IMPROVED_QUICK = 6; exhF5,AW|K
public final static int MERGE = 7; Xy{b(b;9
public final static int IMPROVED_MERGE = 8; ,QQ:o'I!
public final static int HEAP = 9; k\lj<v<vD
\!PC:+uJ
public static void sort(int[] data) { wqyAEVea'8
sort(data, IMPROVED_QUICK); ~t}:vGDj
} BYY>;>V
private static String[] name={ _Sg29qFK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Fh"S[e
}; ReRRFkO"2
}PXWRv.gW
private static Sort[] impl=new Sort[]{ f|`{PP`\
new InsertSort(), uODsXi{z
new BubbleSort(), \DHCf4,
new SelectionSort(), =nsY[ s<
new ShellSort(), <7p2OPD
new QuickSort(), \yy!?UlaI
new ImprovedQuickSort(), V7^?jck
new MergeSort(), NE! Xt<A
new ImprovedMergeSort(), +)Ty^;+[1
new HeapSort() YT_kMy>
}; &F:7U!
f`cz@
public static String toString(int algorithm){ N>~*Jp2;
return name[algorithm-1]; fSTEZH
} nuQ"\ G
KDhHp^IXQ
public static void sort(int[] data, int algorithm) { =19]a
impl[algorithm-1].sort(data); "P|G^*"~2
} +n:#Uf)
M}c_KFMV
public static interface Sort { $xl*P#
public void sort(int[] data); &K4o8Qz
} vhg4E80Kr
/Iskjcc60W
public static void swap(int[] data, int i, int j) { i.<}X
int temp = data; '%MIG88
data = data[j]; brFOQU?
data[j] = temp; 6!'yU=Z`
} 6R<%.-qr
} A+p}oY '