[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; o_N02l4J)
} Ji[w; [qL
int i1=l; g:clSN,
int i2=mid+1; '~cEdGD9H
for(int cur=l;cur<=r;cur++){ VV4_
if(i1==mid+1) >lW*%{|b$^
data[cur]=temp[i2++]; ZF/KV\Ag)
else if(i2>r) .eAC!R
data[cur]=temp[i1++]; I(CI')Q
else if(temp[i1] data[cur]=temp[i1++]; fytx({I .a
else e](=)h|
data[cur]=temp[i2++]; NE4fQi?3
} W*m[t&;
} tVcs r
o|W? a#_\
} ZD{srEa/a
w8i!Qi#y5D
改进后的归并排序: wm8x1+P
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package org.rut.util.algorithm.support; Vel;t<1
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import org.rut.util.algorithm.SortUtil; IXN4?=)I
M5V1j(URE
/** |<*(`\'w
* @author treeroot !%X`c94
* @since 2006-2-2 D+3Y.r9
* @version 1.0 aVYUk7_<
*/ "p{'984r<
public class ImprovedMergeSort implements SortUtil.Sort { ;Z_C3/b
a=FRJQ8S
private static final int THRESHOLD = 10; @^%_ir(
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/* kI'A` /Bl
* (non-Javadoc) `[\phv
* ^-!HbbVv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "/fs%F
*/ h;KK6*Z*$E
public void sort(int[] data) { S\ZAcz4
int[] temp=new int[data.length]; >nDnb4 'C
mergeSort(data,temp,0,data.length-1); ,]mwk~HeF
} =R.9"7~2x
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private void mergeSort(int[] data, int[] temp, int l, int r) { H=#Jg;_w
int i, j, k; 1znV>PO!
int mid = (l + r) / 2; /8>/"Z2S
if (l == r) ^gyp- !
return; [BBKj)IK
if ((mid - l) >= THRESHOLD) F/SsiUBS
mergeSort(data, temp, l, mid); e;5Lv9?C8
else rk|(BA
insertSort(data, l, mid - l + 1); %6'D!H?d
if ((r - mid) > THRESHOLD) )1}g7:
mergeSort(data, temp, mid + 1, r); J#DcT@
else HJR<d&l;p
insertSort(data, mid + 1, r - mid); zYdtQjv
bl?%:qb.V
for (i = l; i <= mid; i++) { )^Pvm
temp = data; }YP7x|
} L"I] mQvd
for (j = 1; j <= r - mid; j++) { ?ljod6
temp[r - j + 1] = data[j + mid]; ZD%_PgiT
} _%vqBr*
int a = temp[l]; +[/r^C
int b = temp[r]; NCFV
for (i = l, j = r, k = l; k <= r; k++) { >}{-!
if (a < b) { Td1ba^J
data[k] = temp[i++]; *v ^"4
a = temp; Sp,Q,Q4
} else { %i>e
data[k] = temp[j--]; |S:!+[
b = temp[j]; xPup?oP >
} !<zzP LC
} FraW6T}_
} d$rUxqB.
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/** 78CJ
* @param data |u r~s$8y-
* @param l YB~t|m65
* @param i j(C UYm
*/ KR(} A"
private void insertSort(int[] data, int start, int len) { !muYn-4M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >Ryss@o
} {IHK<aW
} aSkx#mV
} cC^C7AAq^
} qd~98FS
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堆排序： UX`DZb+^
#6sC&w3
package org.rut.util.algorithm.support; *P R_Y=v%
.l=*R7~EU
import org.rut.util.algorithm.SortUtil; OsL%SKs|
Vnj/>e3
/** *X l<aNNx
* @author treeroot }FiN 7#
* @since 2006-2-2 ,i?!3oLT
* @version 1.0 hdtnC29$
*/ \41)0,sEy
public class HeapSort implements SortUtil.Sort{ 1DLG]-j}
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/* (non-Javadoc) 4ylDD|) rO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AY'?Xt
*/ ,&&M|,NQ&s
public void sort(int[] data) { ob0 8xGj
MaxHeap h=new MaxHeap(); PT#eXS9_
h.init(data); $l,Zd6<1q
for(int i=0;i h.remove(); CQzjCRS d
System.arraycopy(h.queue,1,data,0,data.length); Lv5X 'yM
} <cv2-?L{
'gZbNg=&[
private static class MaxHeap{ M2E87w
vk)0n=
void init(int[] data){ 0\Yx.\X,
this.queue=new int[data.length+1]; ,0uo&/Y4L
for(int i=0;i queue[++size]=data; [AX"ne#M*
fixUp(size); aaz"`,7_
} +'['HQ)
} |@ZqwC=
2PR7M.V7
private int size=0; 6{+_T
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private int[] queue; P"9@8aLB
vDW&pF_eI>
public int get() { 4l ZJb
return queue[1]; )'!ml
} ,t%CK!8
?S@R~y0K
public void remove() { }-{b$6]
SortUtil.swap(queue,1,size--); `[@^m5?b-
fixDown(1); 2rO)qjiH
} M*O(+EM
file://fixdown &#-|Yh/
private void fixDown(int k) { +t>*l>[
int j; UOu6LD/|h
while ((j = k << 1) <= size) { 6c2ThtL
if (j < size %26amp;%26amp; queue[j] j++; n4WSV
if (queue[k]>queue[j]) file://不用交换 YO(:32S
break; p584)"[*t
SortUtil.swap(queue,j,k); P#[IUXtT
k = j; 4Hml.|$
} OgKWgvy
} <+\k&W&Y|y
private void fixUp(int k) { ~TG39*m
while (k > 1) { a*6wSAA )
int j = k >> 1; R5K-KSvW
if (queue[j]>queue[k]) u%=bHg
break; niYz9YX
SortUtil.swap(queue,j,k); jy!f{dsC
k = j; gp$EXJ=
} W1?!iE~tO
} 2{mY:\
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} Kd/[Bs%
Ehb?CnV#J
} T/wM(pr'
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SortUtil： +MNSZLP]
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package org.rut.util.algorithm; V;iL[
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import org.rut.util.algorithm.support.BubbleSort; .'5'0lR5
import org.rut.util.algorithm.support.HeapSort; 8Wdkztp/S
import org.rut.util.algorithm.support.ImprovedMergeSort; Ii~; d3.
import org.rut.util.algorithm.support.ImprovedQuickSort; 0{0;1.ZP
import org.rut.util.algorithm.support.InsertSort; PyC;f8n'(
import org.rut.util.algorithm.support.MergeSort; ;48P vw>g}
import org.rut.util.algorithm.support.QuickSort; h4XcKv+
import org.rut.util.algorithm.support.SelectionSort; WYwzo V-
import org.rut.util.algorithm.support.ShellSort; _x\-!&[p
+R "AA_A?
/** *CeQY M
* @author treeroot ;Ze"<U
* @since 2006-2-2 5jn$7iE`
* @version 1.0 ,VKQRmd
*/ 0W~.WkD
public class SortUtil { :%/\1$3P
public final static int INSERT = 1; W il{FcHY
public final static int BUBBLE = 2; u}Ei_ O<z
public final static int SELECTION = 3; -l-AToO4
public final static int SHELL = 4; =<[7J]%
public final static int QUICK = 5; t/JOERw
public final static int IMPROVED_QUICK = 6; xw4ey<"I
public final static int MERGE = 7; m!#_CQ:
public final static int IMPROVED_MERGE = 8; F~z_>1lpP&
public final static int HEAP = 9; ulH0%`Fi
V.;:u#{@-Q
public static void sort(int[] data) { OM20-KDc5
sort(data, IMPROVED_QUICK); gI)w^7Gi
} <K.Bq]
private static String[] name={ I:F'S#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EvwbhvA(
}; 99F>n[5
[#7y[<.P
private static Sort[] impl=new Sort[]{ 4)c+t"h
new InsertSort(), IIq"e~"Vs
new BubbleSort(), ')C|`(hs
new SelectionSort(), ,3:QB_
new ShellSort(), 4-y6MH
new QuickSort(), C0\%QXu
new ImprovedQuickSort(), t-!Rgg$9
new MergeSort(), Z,0O/RFJ.q
new ImprovedMergeSort(), /K_ i8!y
new HeapSort() :~t<L%tYF
}; qPsyqn?Y|
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public static String toString(int algorithm){ McEmd.S<n
return name[algorithm-1]; }l.KpdRT2
} LkaG8#m1R
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public static void sort(int[] data, int algorithm) { davvI$TA
impl[algorithm-1].sort(data); k?^%hO>[
} ,q8(]n4
(-bRj#
public static interface Sort { M|U';2hZN:
public void sort(int[] data); %v]7BV^%6
} ER{yuw
BwJNi6,
public static void swap(int[] data, int i, int j) { PPN q:,
int temp = data; \C|;F
data = data[j]; w3<Z?lj:
data[j] = temp; ^[en3aQ
} 6/|U
} c2/FHI0J;