[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; 1RUbY>K#U
} E?c{02fu
int i1=l; U!-+v:SF
int i2=mid+1; Xxsnpb>
for(int cur=l;cur<=r;cur++){ "3KSmb
if(i1==mid+1) /B#lju!
data[cur]=temp[i2++]; e7)%=F/)
else if(i2>r) <:yq~?
data[cur]=temp[i1++]; .8uwg@yD
else if(temp[i1] data[cur]=temp[i1++]; _XO)`D~
else l!2Z`D_MD
data[cur]=temp[i2++]; E+m"yQp{
} EX_sJc
} qzbkxQu]g
A>1p]#
} G]NtX4'4
A(@gv8e[H^
改进后的归并排序: +K?N:w
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package org.rut.util.algorithm.support; L)nVpqm
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import org.rut.util.algorithm.SortUtil; ~1]2A[`s!
?`*-QG}
/** g!)LhE
* @author treeroot `zOAltfd
* @since 2006-2-2 n#L2cv~Aj"
* @version 1.0 ~m09yc d<
*/ <{xAvN(:
public class ImprovedMergeSort implements SortUtil.Sort { Xgth|C}k
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private static final int THRESHOLD = 10; Y l3[~S
|ukdn2Q
/* ?;#3U5$v
* (non-Javadoc) WUK.>eM0
* G~hILW^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jz3<yQ-
*/ +FKP5L}
public void sort(int[] data) { a.U:B [v`
int[] temp=new int[data.length]; h/bYtE
mergeSort(data,temp,0,data.length-1); Cy> +j{%!
} >,]e[/p
IV#My9}e
private void mergeSort(int[] data, int[] temp, int l, int r) { OZ0%;Y0
int i, j, k; f I-"8f0_
int mid = (l + r) / 2; 0]w[wc <
if (l == r) pC.4AkEO
return; =ZIFS
if ((mid - l) >= THRESHOLD) >s?;2T2"yx
mergeSort(data, temp, l, mid); @`*YZq>p
else @' :um
insertSort(data, l, mid - l + 1); eKti+n.
if ((r - mid) > THRESHOLD) \R6T"U
mergeSort(data, temp, mid + 1, r); |nZB/YZt
else %=O!K>^vt<
insertSort(data, mid + 1, r - mid); [gr[0aGBc
]Tw6Fg1o>
for (i = l; i <= mid; i++) { N6 (w<b
temp = data; >@e%,z
} @!NHeH=pR
for (j = 1; j <= r - mid; j++) { a}7KpKCD
temp[r - j + 1] = data[j + mid]; x(N}^Hu
} OiEaVPSI;
int a = temp[l]; rL/7wa
int b = temp[r]; >:nJTr
for (i = l, j = r, k = l; k <= r; k++) { zVLi
if (a < b) { #l% \}OC
data[k] = temp[i++]; J|8YB3K,
a = temp; yVv3S[J
} else { +NMSvu_?
data[k] = temp[j--]; E004"E<E
b = temp[j]; .[85<"C
} :2gO) 'cD
} Yaepy3F
} emIbGkH
*0ntx$M-w
/** HD|)D5wH|
* @param data BQf+1Ly&
* @param l X^^D[U
* @param i 6{WT;W>WT:
*/ T`[ZNq+${
private void insertSort(int[] data, int start, int len) { XYTcG;_z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hrt-<7U
} DTVnQC
} Oip..f0
} hIr^"kVK
} iiB$<b.((I
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堆排序： K%Ml2V
3_/d=ZI\
package org.rut.util.algorithm.support; !Ve3:OZ.nO
P*sCrGO%
import org.rut.util.algorithm.SortUtil; 7s3<}
{Vu:yh\<
/** +=$G6uR$
* @author treeroot AOUO',v
* @since 2006-2-2 }1 ^.A84a
* @version 1.0 mn` Ae=
*/ .p_$]
public class HeapSort implements SortUtil.Sort{ t/(j8w
bc-}Qn
/* (non-Javadoc) 9Ua@-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e0 EJ[bG
*/ ]0E-lD0J
public void sort(int[] data) { Jq)k?WS
MaxHeap h=new MaxHeap(); A'2:(m@{T
h.init(data); }qPo%T
for(int i=0;i h.remove(); aH~"hB^e
System.arraycopy(h.queue,1,data,0,data.length); _Z&R'`kg
} U5=J;[w}N
9hU@VPB~
private static class MaxHeap{ T94$}- 5/)
krU2S-
void init(int[] data){ *^ BE1-
this.queue=new int[data.length+1]; VVY\W!
for(int i=0;i queue[++size]=data; 0}N^l=jQ
fixUp(size); RJM(+5xQ|
} cPSu!u}D
} mH"`46
3WS %H17
private int size=0; Ja1*a,],L
uv!/DX#
private int[] queue; fCR;Fk2B
Ygb#U'|
public int get() { g&V.o5jIhc
return queue[1]; wDk[)9#A
} DS fKUx&
HS7!O
public void remove() { sEa:p:!
SortUtil.swap(queue,1,size--); <[bDNe["?
fixDown(1); '`u1,h
} TXM.,5Dx\
file://fixdown =k z;CS+
private void fixDown(int k) { j&9~OXYv
int j; PhQD}|S
while ((j = k << 1) <= size) { gFH_^~7i8p
if (j < size %26amp;%26amp; queue[j] j++; {T9g\F*
if (queue[k]>queue[j]) file://不用交换 I~I%z'"RQd
break; RfD$@q9
SortUtil.swap(queue,j,k); ~+F: QrXcI
k = j; E:ytdaiT
} ~Y(M>u.+!
} <~3 aaO
private void fixUp(int k) { v|xlI4
while (k > 1) { k)J7) L
int j = k >> 1; LuVj9+1 S
if (queue[j]>queue[k]) >cp9{+#f
break; y-U(`{[nM
SortUtil.swap(queue,j,k); jL# akV
k = j; ]8#{rQ(
} 4}CRM# W2
} DEBgb
|Yx8Ez
} v7-'H/d.
km^AX:r1
} #[8gH>7
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SortUtil： i0P+,U
La!PGZ{
package org.rut.util.algorithm; bMZ0%(q
ms$o,[
import org.rut.util.algorithm.support.BubbleSort; kU /?#s
import org.rut.util.algorithm.support.HeapSort; 5IepVS(>?v
import org.rut.util.algorithm.support.ImprovedMergeSort; 75F&s,4+
import org.rut.util.algorithm.support.ImprovedQuickSort; %bsdC0xM
import org.rut.util.algorithm.support.InsertSort; e#seqx
import org.rut.util.algorithm.support.MergeSort; oTL "]3`'
import org.rut.util.algorithm.support.QuickSort; KQqlM
import org.rut.util.algorithm.support.SelectionSort; ?z6C8T~+
import org.rut.util.algorithm.support.ShellSort; ^ey\ c1K
Vf@/}=X *
/** 0C7"*H0R
* @author treeroot l20q(lb
* @since 2006-2-2 myo/}58Nv
* @version 1.0 s[g1ei9
*/ ]Cj&C/(
public class SortUtil { P$Dr6;
public final static int INSERT = 1; ]u:NE'0Xy
public final static int BUBBLE = 2; {r"s.|n
public final static int SELECTION = 3; R[Rs2eS_
public final static int SHELL = 4; r'8e"pTi
public final static int QUICK = 5; xP*RH-<
public final static int IMPROVED_QUICK = 6; y`N1I
public final static int MERGE = 7; 1ID!rxE
public final static int IMPROVED_MERGE = 8; GP[$&8\M
public final static int HEAP = 9; /oI''O%M
>A)he!I
public static void sort(int[] data) { BP7_o63/G
sort(data, IMPROVED_QUICK); ;HC"hEc!
} %8ul}}d9
private static String[] name={ 5!Guf?i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" us]ah~U6A
}; eY-$hnUe
Yc %eTh
private static Sort[] impl=new Sort[]{ < ;g0?M\
new InsertSort(), \h yTcFb
new BubbleSort(), N5s_o0K4TU
new SelectionSort(), |h'ugx1iY
new ShellSort(), U3Q'ZT
new QuickSort(), iZ58;`
new ImprovedQuickSort(), .1}u0IbJ
new MergeSort(), HiWZ?G
new ImprovedMergeSort(), +EFurdX\
new HeapSort() -uh/W=Q1R
}; =?}'\ >G "
\&cVcAg
public static String toString(int algorithm){ A[b'MNsv
return name[algorithm-1]; iX,Qh2(ig
} Cjd +\7#G
{c$W-t):U|
public static void sort(int[] data, int algorithm) { I5e!vCG)
impl[algorithm-1].sort(data); H: U_k68
} J/mLB7^R
gC'GZi^
public static interface Sort { )~Q$ tM`
public void sort(int[] data); ZpwB"%e$
} _Q7)FK
u-?&~WA
public static void swap(int[] data, int i, int j) { CfVz'
int temp = data; 0/%zXp&m
data = data[j]; Z8:iaP)
data[j] = temp; R; IB o
} -j(/5.a
} . E.OBn