[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; }\k"n{!"
} A\5L 7
int i1=l; iO; 7t@]-
int i2=mid+1; ,~W|]/b<q
for(int cur=l;cur<=r;cur++){ x'R`. !g3
if(i1==mid+1) Od)C&N=y
data[cur]=temp[i2++]; 9(wK@
else if(i2>r) Wo=jskBrQ
data[cur]=temp[i1++]; `Ryp% Bn
else if(temp[i1] data[cur]=temp[i1++]; <1M-Ro?5k
else Aq7osU1B
data[cur]=temp[i2++]; @7n"yp*"
} j"Pv0tehw
} sCHJ&>m5-
"C`Ub
} [}]Q?*_
Pk)1WK7E
改进后的归并排序: -A!%*9Z
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package org.rut.util.algorithm.support; geCM<]
jEJT-*I1+
import org.rut.util.algorithm.SortUtil; uM6+?A9@l
k"w"hg&e
/** k|d+#u[Mj@
* @author treeroot $* Kvc$D
* @since 2006-2-2 wLr_-vJ
* @version 1.0 jW@Uo=I[
*/ }RqK84K
public class ImprovedMergeSort implements SortUtil.Sort { (dSL7nel;L
h9W^[6
private static final int THRESHOLD = 10; Ma"]PoP
#Mw8^FST
/* "snw4if
* (non-Javadoc) W5MTD]J
* Q]>.b%s[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q5:N2Jmo?z
*/ ~&bq0(
public void sort(int[] data) { 12LL48bi
int[] temp=new int[data.length]; Z#\P&\`1z
mergeSort(data,temp,0,data.length-1); u;c?d!E
} h'F=YF$o
!C:$?oU
private void mergeSort(int[] data, int[] temp, int l, int r) { |$b}L7_
int i, j, k; ekCC5P!
int mid = (l + r) / 2; #;nYg?d=
if (l == r) [cp+i^f
return; XpJ7o=?W3
if ((mid - l) >= THRESHOLD) n?Nt6U
mergeSort(data, temp, l, mid); 92KRb;c
else }`~+]9<
insertSort(data, l, mid - l + 1); ^J;bso`
if ((r - mid) > THRESHOLD) XOS[No~
mergeSort(data, temp, mid + 1, r); LFtt gY
else %bfQ$a:
insertSort(data, mid + 1, r - mid); <UQbt N-B\
C~iL3Cb
for (i = l; i <= mid; i++) { 3$9W%3
temp = data; HA>OkA/
} n7-6- #
for (j = 1; j <= r - mid; j++) { <e</m)j
temp[r - j + 1] = data[j + mid]; y h9*z3
} 9qG6Pb
int a = temp[l]; BF{Y"8u$
int b = temp[r]; 3/n5#&c\4
for (i = l, j = r, k = l; k <= r; k++) { Jze:[MYS
if (a < b) { dlTt_.
data[k] = temp[i++]; )hfpwdQ
a = temp; u4h4.NHX
} else { &KRX[2
data[k] = temp[j--]; Npy:!
b = temp[j]; 6~w@PRy
} JcxThZP~
} #O dJ"1A|
} *bA.zmzM
"1M[5\Ax
/** V6reqEh
* @param data R/z=p_6p7`
* @param l 6jLCU%^
* @param i 9mTJ|sN:e
*/ hZ
private void insertSort(int[] data, int start, int len) { ;MdlwQ$`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dNeVo|Y~h
} QB'aON\S
} @2 fg~2M1
} E09:E
} iAIuxO
| h#u^v3
堆排序： W|63Ir67
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package org.rut.util.algorithm.support; fS78>*K
wi6 ~}~%
import org.rut.util.algorithm.SortUtil; uk<9&{
)|=j`jCC
/** ]-/VHh
* @author treeroot ?2Py_gkf
* @since 2006-2-2 :!!at:>
* @version 1.0 Qn)a/w-
*/ b!5~7Ub.No
public class HeapSort implements SortUtil.Sort{ UrEs4R1#
:E )>\&
/* (non-Javadoc) Qjv}$`M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9m~p0ILh
*/ *wB1,U{
public void sort(int[] data) { 5taT5?n2
MaxHeap h=new MaxHeap(); 7\Y0z
h.init(data); -z%^)VE
for(int i=0;i h.remove(); q9r[$%G
System.arraycopy(h.queue,1,data,0,data.length); ZRU{[4
} i6Emhji
mSh[}%swj
private static class MaxHeap{ &Ys<@M7E:
C1 GKLl~
void init(int[] data){ cB}D^O
this.queue=new int[data.length+1]; Vb]=B~^`
for(int i=0;i queue[++size]=data; x)O!["'"
fixUp(size); 57']#j#"hj
} ;,:`1UI
} #fn)k1
<k'h:KB?`
private int size=0; aQ\$A`?
K:#I
private int[] queue; *d4eK+U$5
\\B(r
public int get() { XYOC_.f1
return queue[1]; VY=jc~c]v
} h^(*Tv-!
+E(L\
public void remove() { = x)-u8P
SortUtil.swap(queue,1,size--); DAr1C+Dy
fixDown(1); '$]97b7G
} >$/>#e~
file://fixdown O)n~](sC\
private void fixDown(int k) { 9gK`E
int j; M\Ye<Tk
while ((j = k << 1) <= size) { HJ[cM6$2
if (j < size %26amp;%26amp; queue[j] j++; uo%)1NS!
if (queue[k]>queue[j]) file://不用交换 rlSeu5X6
break; ~ =2PU$u
SortUtil.swap(queue,j,k); YHygo#4=8
k = j; Pw`8Wj
} yZU6xY
} y'nK>)WG4
private void fixUp(int k) { B7E:{9l~s{
while (k > 1) { u[=r,^YQ
int j = k >> 1; 0gP}zM73
if (queue[j]>queue[k]) ShP^A"Do
break; 0)e\`Bv
SortUtil.swap(queue,j,k); A&Usddcp
k = j; ~/iKh11
} 9`X\6s
} hT&Y#fh
>rmqBDKaQ
} ZdWm:(nkU
bUdLs.:
} Q1I6$8:7
x}I+Iggi
SortUtil： J$w<$5UY
C]`$AqKl
package org.rut.util.algorithm; qvKG-|j
z3m85F%dR
import org.rut.util.algorithm.support.BubbleSort; u?<%q!
import org.rut.util.algorithm.support.HeapSort; yfjWbW
import org.rut.util.algorithm.support.ImprovedMergeSort; Z4w!p?Wqa
import org.rut.util.algorithm.support.ImprovedQuickSort; 6@F9G4<Z
import org.rut.util.algorithm.support.InsertSort; sW'AjI
import org.rut.util.algorithm.support.MergeSort; 17"uf.G
import org.rut.util.algorithm.support.QuickSort; ' ;FnIZ
import org.rut.util.algorithm.support.SelectionSort; Ma']?Rb`
import org.rut.util.algorithm.support.ShellSort; S3*`jF>q
h-K_Lr]
/** vm7z,FfN
* @author treeroot PQSP&
* @since 2006-2-2 jTtu0Q|
* @version 1.0 .*S#aq4S
*/ b;W3j
public class SortUtil { &4x}ppX
public final static int INSERT = 1; 0#s"e}@v
public final static int BUBBLE = 2; )|R)Q6UJ
public final static int SELECTION = 3; t[;LD_
public final static int SHELL = 4; 5o'FS{6U
public final static int QUICK = 5; U!?_W=?
public final static int IMPROVED_QUICK = 6; dI@(<R
public final static int MERGE = 7; {14fA)`%
public final static int IMPROVED_MERGE = 8; qJa H,
public final static int HEAP = 9; { VfXsI
r|fL&dtr
public static void sort(int[] data) { Zd}9O jz5
sort(data, IMPROVED_QUICK); m_?~OL S
} y@:h4u"3
private static String[] name={ 0oZ= yh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O1U=X:Zl
}; oAJM]%g{
):68%,
private static Sort[] impl=new Sort[]{ M2>Vj/
new InsertSort(), +yH7v5W
new BubbleSort(), z2_*%S@
new SelectionSort(), kYqU9cB~
new ShellSort(), 6azGhxh
new QuickSort(), 2Aazy'/
new ImprovedQuickSort(), $=8 NED5
new MergeSort(), %G_B^p4
new ImprovedMergeSort(), nn:.nU|I
new HeapSort() Vvn2 Ep
}; 2~1SQ.Q<RY
Is)u }
public static String toString(int algorithm){ m '|bGV
return name[algorithm-1]; rJT^H5!o"
} mAj?>;R2$2
,j2Udn}
public static void sort(int[] data, int algorithm) { V6&!9b
impl[algorithm-1].sort(data); Yz/md1T$
} +`7i'ff
U9:zVy
public static interface Sort { ^& tZ
public void sort(int[] data); 9N%We|L,c
} n.`($yR_
6xe*E[#k\
public static void swap(int[] data, int i, int j) { p$NQyS5C"S
int temp = data; hOu3 bA
data = data[j]; :0j?oY~e
data[j] = temp; ,.83m%i
} LqoB 10Kc\
} "3)C'WlEy/