[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; b8 ^O"oDrp
} }@y(-7t
int i1=l; oH,{'S@q
int i2=mid+1; gTS}'w{
for(int cur=l;cur<=r;cur++){ W ZT) LYA
if(i1==mid+1) YYN'LF#j
data[cur]=temp[i2++]; 4St-Q]Y _
else if(i2>r) &-$27
data[cur]=temp[i1++]; 4,P(w+
else if(temp[i1] data[cur]=temp[i1++]; VnYcqeCm
else /szwVA
data[cur]=temp[i2++]; A_\`Gj!s%
} 68UfuC
} B? aMX,1
r) u@,P
} *)(S}D\94
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改进后的归并排序: 'ti~TG
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package org.rut.util.algorithm.support; _f1;Hhoa
'5m4kDs
import org.rut.util.algorithm.SortUtil; sXi~cfFaE
dC<2%y
/** #z1/VZ
* @author treeroot 5SMV3~*P
* @since 2006-2-2 YNB7`:
* @version 1.0 j"s7P%
*/ j8G$,~v
public class ImprovedMergeSort implements SortUtil.Sort { lu?:1V-
k%TBpG:T
private static final int THRESHOLD = 10; bZ>dr{%%e
_P` ^B
/* T)I\?hqTB
* (non-Javadoc) 2lCgUe)N
* WfXwI 'y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G=F_{z\}
*/ SajG67
public void sort(int[] data) { L)n_ Q
int[] temp=new int[data.length]; | .gE9'"bv
mergeSort(data,temp,0,data.length-1); ``-pjD(t
} \ iA'^69
Bp_8PjQ
private void mergeSort(int[] data, int[] temp, int l, int r) { rEMe=>^
int i, j, k; OQIr"
int mid = (l + r) / 2; ' Tk4P{
if (l == r) l>?f+70
return; HUChg{[
if ((mid - l) >= THRESHOLD) <L('RgA@X
mergeSort(data, temp, l, mid); ' GUCXx
else :Xs4C%H;
insertSort(data, l, mid - l + 1); %>y`VN D
if ((r - mid) > THRESHOLD) ' <?=!&\D
mergeSort(data, temp, mid + 1, r); #N$\d4q9
else /9A6"Z
insertSort(data, mid + 1, r - mid); 5\EnD,y
R,s}<N$
for (i = l; i <= mid; i++) { r1Hh @sxn
temp = data; lWn}afI
} [1Aoj|
for (j = 1; j <= r - mid; j++) { I+F>^4_d
temp[r - j + 1] = data[j + mid]; !rF1Remw
} (hBph+
int a = temp[l]; o`Af6C;Q
int b = temp[r]; Qo!F?i/ n
for (i = l, j = r, k = l; k <= r; k++) { w~q ]&
if (a < b) { H#uN&^+H
data[k] = temp[i++]; lCgzQZ
a = temp; yk'L_M(=
} else { N4z[=b>
data[k] = temp[j--]; Peo-t*-06
b = temp[j]; L]%!YP\<T
} ORM3oucP
} ~"_!O+Pj
} O+|ipw*B%
V!(7=ku!`
/** 73B[|J*
* @param data 6<9}>Wkf
* @param l !Eg2#a?
* @param i &8pGq./lr=
*/ !C|Z+w9Y
private void insertSort(int[] data, int start, int len) { 3 l}9'j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~;z] _`_Va
} _^eiN'B
} -\USDi(
} w?zy/+N~
} p>i8aN
$)nPj_h
堆排序： +V(^"Z~
vS"h`pL
package org.rut.util.algorithm.support; X-X`Z`o
k&uh
import org.rut.util.algorithm.SortUtil; gKcBx6G Q
lXF7)H&T
/** rT=C/SKP
* @author treeroot lo1bj*Y2
* @since 2006-2-2 \#]C !JQ
* @version 1.0 +0)M1!gK
*/ 9Zj3"v+b
public class HeapSort implements SortUtil.Sort{ }& W=
5]up%.
/* (non-Javadoc) 4JU2x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z]SEPYq:
*/ xY/F)JOeG
public void sort(int[] data) { :iLRCK3C
MaxHeap h=new MaxHeap(); *];QPi~
h.init(data); ,(Ol]W}
for(int i=0;i h.remove(); pg!MtuC}
System.arraycopy(h.queue,1,data,0,data.length); |x.^rx`
} AE+BrN +"2
H2H[DVKv
private static class MaxHeap{ XI|k,Ko<
Rnoz[1y?0
void init(int[] data){ {]cr.y]\
this.queue=new int[data.length+1]; C7G,M
for(int i=0;i queue[++size]=data; G3`9'-2q@c
fixUp(size); .%)uCLZr$
} x/CM)!U)
} P 4t@BwU$
6Q\|8a
private int size=0; F\&{>&
\+nV~Pi"A
private int[] queue; &tvtL
a]7g\rg)
public int get() { :aBxyS*}G
return queue[1]; ,}]v7DD
} M]p-<R\
k7Qs#L
public void remove() { (_!I2"Q*
SortUtil.swap(queue,1,size--); vb?.`B_>&
fixDown(1); 9od*N$
} u8.Tu7~
file://fixdown .)$MZyo
private void fixDown(int k) { z/+{QBen8
int j; EPH n"YK
while ((j = k << 1) <= size) { +or<(%o @
if (j < size %26amp;%26amp; queue[j] j++; OJ"./*H
if (queue[k]>queue[j]) file://不用交换 UimofFmI%
break; J _dgP[
SortUtil.swap(queue,j,k); {J izCUo_'
k = j; 3N-pND0>p
} $[Z~BfSQ
} 2"?DaX
private void fixUp(int k) { SepwMB4@
while (k > 1) { bEj}J_#
int j = k >> 1; \?R#ZxP@
if (queue[j]>queue[k]) EnlAgL']|
break; :H3/+/x
SortUtil.swap(queue,j,k); i0$*):b
k = j; /hu>MZ(\
} \QC{38}
} KUYwc@si\
=f y|Dm74
} &PRoT#,
J,)ytw]
} [|1I.AZ{
aQ$sn<-l
SortUtil： xSd&xwP
BCe'J!
package org.rut.util.algorithm; KcpYHWCa.
\u{4=-C.
import org.rut.util.algorithm.support.BubbleSort; u>.a;BO
import org.rut.util.algorithm.support.HeapSort; G 3,v'D5
import org.rut.util.algorithm.support.ImprovedMergeSort; #"KC29!Yj
import org.rut.util.algorithm.support.ImprovedQuickSort; !hZ: \&V
import org.rut.util.algorithm.support.InsertSort; \Z3K ~
import org.rut.util.algorithm.support.MergeSort; d8vf kVB
import org.rut.util.algorithm.support.QuickSort; mi<Q3;m
import org.rut.util.algorithm.support.SelectionSort; O+|C<;K
import org.rut.util.algorithm.support.ShellSort; mN}szW,
{eI'0==
/** t4#gW$+^?H
* @author treeroot r!dWI
* @since 2006-2-2 QK+,63@D\=
* @version 1.0 KzO"$+M
*/ YwET.(oo
public class SortUtil { .{gDw
public final static int INSERT = 1; Gs#9'3_U5
public final static int BUBBLE = 2; +[}y` -t
public final static int SELECTION = 3; Rk9n,"xpv
public final static int SHELL = 4; CC^D4]ug
public final static int QUICK = 5; _JC*4
public final static int IMPROVED_QUICK = 6; s(_z1
public final static int MERGE = 7; ?g1eW q&
public final static int IMPROVED_MERGE = 8; t__f=QB/
public final static int HEAP = 9; 8jCho
qiOtbH=
public static void sort(int[] data) { Y*xgY*K
sort(data, IMPROVED_QUICK); ,DEq"VW_
} .BxI~d^
private static String[] name={ <.`i,|?MHS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9@1n:X
}; J_F\cM
E+y_te^+b
private static Sort[] impl=new Sort[]{ p;4FZ$
new InsertSort(), |X{j^JP5
new BubbleSort(), C.4(8~Y=~
new SelectionSort(), 6$#,$aO
new ShellSort(), |kmP#`P~
new QuickSort(), Jk{SlH3'
new ImprovedQuickSort(), Gd!_9S`68
new MergeSort(), km>ZhsqD
new ImprovedMergeSort(), /Ey%aA4v
new HeapSort() =U84*HAv
}; ~{DJ,(N"n
{"jtR<{)
public static String toString(int algorithm){ tnpEfi-
return name[algorithm-1]; IV~)BW leT
} R1JD{
AXcmN
public static void sort(int[] data, int algorithm) { pI f6RwH}%
impl[algorithm-1].sort(data); U/FysN_N!
} 54{E&QvL8o
UR'v;V&Cb\
public static interface Sort { koB'Zp/FaY
public void sort(int[] data); *v#V%_o
} RAa1^Qb
TT3 6Y
public static void swap(int[] data, int i, int j) { bV:<%l]
int temp = data; Jd `Qa+
data = data[j]; U:x;4
data[j] = temp; NxJnU<g-
} h_-4Q"fb(
} FVNTE+LW