[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; #-PMREgO
} 'IFA>}e7W
int i1=l; _`gkYu3R+
int i2=mid+1; )B+R|PZ,
for(int cur=l;cur<=r;cur++){ ("F$r$9S
if(i1==mid+1) -2!S>P Zs
data[cur]=temp[i2++]; :J_UXtx
else if(i2>r) `Tf}h8*
data[cur]=temp[i1++]; ` &bF@$((
else if(temp[i1] data[cur]=temp[i1++]; d2V\T+=
else 'n>44_7L
data[cur]=temp[i2++]; ,|A6l?iV
} ?@Q0;LG
} <T;V9(66
*C0a,G4
} .c&&@>m@.
cJbv,RV<
改进后的归并排序: tQRbNY#}Z
GyMN;|
package org.rut.util.algorithm.support; M$.bC0}T
^#C+l
import org.rut.util.algorithm.SortUtil; U;TS7A3
|vm-(HY!
/** jSM`bE+"
* @author treeroot OI*ltba?
* @since 2006-2-2 *aC[Tv[-P
* @version 1.0 [s`B0V`04
*/ QlV(D<
public class ImprovedMergeSort implements SortUtil.Sort { bCr W'}:de
)P?Fni}
private static final int THRESHOLD = 10; QV.>Cy
$y,KDR7^
/* QH4m7M@ni
* (non-Javadoc) #pgD-0_
* .P7q)lj36h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ' `c \Dq
*/ AZE%fOG<i
public void sort(int[] data) { Y0kcxpK/
int[] temp=new int[data.length]; }!k?.(hpE
mergeSort(data,temp,0,data.length-1); 9H;Os:"\|
} }yn%_KQ0
W1<*9O
private void mergeSort(int[] data, int[] temp, int l, int r) { -,YI>!
int i, j, k; DBHHJD/q
int mid = (l + r) / 2; QIU%!9Y
if (l == r) AzF*4x
return; & wtE"w
if ((mid - l) >= THRESHOLD) !vRN'/(Vyu
mergeSort(data, temp, l, mid); );AtFP0Y
else E2dS@!]V
insertSort(data, l, mid - l + 1); lhJY]tQt/
if ((r - mid) > THRESHOLD) t#_6GL
mergeSort(data, temp, mid + 1, r); f4*(rX
else @(oY.PeS<z
insertSort(data, mid + 1, r - mid); %'h:G Bkd
PX_9i@ZG
for (i = l; i <= mid; i++) { |v@_~HV
temp = data; Og1\6Q
} $*$4DG1gaR
for (j = 1; j <= r - mid; j++) { "%+||IyW
temp[r - j + 1] = data[j + mid]; 4[gbRn'
} ": BZZ\!
int a = temp[l]; R!7--]Wcg
int b = temp[r]; <dE~z]P
for (i = l, j = r, k = l; k <= r; k++) { 2]Cn<zJ
if (a < b) { 'YGP42#
data[k] = temp[i++]; K3h];F!^
a = temp; {+cx}`
} else { U';)]vB$
data[k] = temp[j--]; [tSv{
b = temp[j]; eN|zD?ba&
} \'u+iB g
} [.Md_
} bZgo}`o%
L\"wz scn
/** zVtTv-DU
* @param data EZ/_uj2&SN
* @param l ) ?kbHm
* @param i mZ? jpnd
*/ PWvTC`?
private void insertSort(int[] data, int start, int len) { ~N| aCi-X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bA Yp }
} S{bp'9]$y
} ;Ccp1a~+
} %rnRy<9
} ~H?v L c;>
*P7n YjG
堆排序： <3tf(?*,k]
SJO*g&duQ
package org.rut.util.algorithm.support; z=>PjIW
>k@{NP2b
import org.rut.util.algorithm.SortUtil; C"`\[F`.k
^t<L
/** rfQs 7S;G
* @author treeroot g0a!auWM
* @since 2006-2-2 WuF\{bUh
* @version 1.0 v,N!cp1
*/ NcwUK\
public class HeapSort implements SortUtil.Sort{ XPq`;<G
oa7 N6
/* (non-Javadoc) 5syzh S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ASMItT
*/ w""u]b%:r
public void sort(int[] data) { Ktzn)7-
MaxHeap h=new MaxHeap(); 7KRNTnd
h.init(data); &1=,?s]&
for(int i=0;i h.remove(); Fd80T6[
System.arraycopy(h.queue,1,data,0,data.length); `LIlR8&@aX
} WTt /y\'6
K^GvU0\
private static class MaxHeap{ iH]0 YT.E
+JD^5J,-NJ
void init(int[] data){ HlkjyD8
this.queue=new int[data.length+1]; &.z-itiV
for(int i=0;i queue[++size]=data; *"F*6+}w"
fixUp(size); h<?I?ZR0$
} "FGgem%9
} _h=h43'3
s:,fXg25J
private int size=0; d@cyQFX
3)&rj 7
private int[] queue; i ^N}avO
u|EJ)dT?
public int get() { E6G;fPd= E
return queue[1]; ]>sMu]biH
} Sqmjf@o$>
Y%]g,mG
public void remove() { 6~s{HI!
SortUtil.swap(queue,1,size--); c(?OE' "Z
fixDown(1); ?&1%&?cg9
} l{ fL~O
file://fixdown SFsT^f<
private void fixDown(int k) { sZqi)lo-s
int j; G~*R6x2g
while ((j = k << 1) <= size) { YWi Y[
if (j < size %26amp;%26amp; queue[j] j++; CSm(yB{|pC
if (queue[k]>queue[j]) file://不用交换 :t+LuH g
break; 5HvYy *B/
SortUtil.swap(queue,j,k); Xe/7rhov
k = j; 95D(0qv
} x5U;i
} ,(c'h:@M
private void fixUp(int k) { #&{)`+!"
while (k > 1) { u6\W"LW
int j = k >> 1; \vj xCkg{
if (queue[j]>queue[k]) =PLy^%
break; MD>E0p)
SortUtil.swap(queue,j,k); waV4~BdL
k = j; K~5(j{Kb8
} ,0>_(5
} X)[QEq^
L`^v"W()
} \jkDRR[
F 'HYWH0?
} 6ESS>I"su
)OGO wStz
SortUtil： &j{IG`Trl
F20%r 0
package org.rut.util.algorithm; L#IY6t
8Waic&lX~
import org.rut.util.algorithm.support.BubbleSort; )=,;-&AR
import org.rut.util.algorithm.support.HeapSort; dUceZmAl
import org.rut.util.algorithm.support.ImprovedMergeSort; *(*XNd||
import org.rut.util.algorithm.support.ImprovedQuickSort; E@="n<uS
import org.rut.util.algorithm.support.InsertSort; FEA/}*2F
import org.rut.util.algorithm.support.MergeSort; O,I7M?dRf
import org.rut.util.algorithm.support.QuickSort; hM(Hq4ed,
import org.rut.util.algorithm.support.SelectionSort; .M\0+,%/
import org.rut.util.algorithm.support.ShellSort; *OKve
=&U7:u
/** N9f;X{
* @author treeroot T5 BoOVgO
* @since 2006-2-2 o`ODz[04
* @version 1.0 hA"z0Fszh
*/ ue}lAW{q
public class SortUtil { 1 7hXg"B
public final static int INSERT = 1; 0L7^Vr)
public final static int BUBBLE = 2; D4GXZX8K
public final static int SELECTION = 3; D2#.qoP #
public final static int SHELL = 4; =1F F2#zS
public final static int QUICK = 5; rk?G[C)2c
public final static int IMPROVED_QUICK = 6; !P_'n
public final static int MERGE = 7; <{1 3Nd'o
public final static int IMPROVED_MERGE = 8; N%?8Bm~dP
public final static int HEAP = 9; umiD2BRZ
`&/zOMp
public static void sort(int[] data) { C1~Ro9si
sort(data, IMPROVED_QUICK); LGVGr
} Tj=g[)+K
private static String[] name={ GwlAEhP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cFG%Ew@
}; ;\+A6(GX{
}KrZ6cG9#
private static Sort[] impl=new Sort[]{ `qbsDfq@
new InsertSort(), Tq >?.bq9
new BubbleSort(), \hZ9in`YlR
new SelectionSort(), <.6$zcW
new ShellSort(), 9hs7B!3pc>
new QuickSort(), !1?Nc}T0Q&
new ImprovedQuickSort(), * @j#13.
new MergeSort(), (KG>lTdN
new ImprovedMergeSort(), KfNR)
new HeapSort() s^AZ)k~J(
}; 3sGe#s%
}Rq-IRa'
public static String toString(int algorithm){ ~7=w,+
return name[algorithm-1]; Wv)2dD2I
} We#O'm
v~HfA)#JK
public static void sort(int[] data, int algorithm) { -U_<:
impl[algorithm-1].sort(data); YJrZ
} X?.LA7)CK
FY]z*=
public static interface Sort { 30/(
public void sort(int[] data); %"RgW\s[R
} qdVExO&
L~(`zO3f
public static void swap(int[] data, int i, int j) { )u'("
int temp = data; $f<Rj/`&
data = data[j]; s"]LQM1|
data[j] = temp; ;-65~i0Iu
} Y3I+TI>x
} 7J2i /m