[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; 9Z21|5
} _RIlGs\.
int i1=l; kno[!A7_6
int i2=mid+1; T(qTipq0
for(int cur=l;cur<=r;cur++){ zu.B>INe
if(i1==mid+1) RRXp9{x`
data[cur]=temp[i2++]; `U=Jbdc l3
else if(i2>r) rvlvk"
data[cur]=temp[i1++]; |dz"uIrT
else if(temp[i1] data[cur]=temp[i1++]; |RXQ_|
else /wax5FS'I,
data[cur]=temp[i2++]; ~8yh,U
} b8_F2
} "X^<g{]
R*!s'R
} ,/%'""`w
x.#E3xI
改进后的归并排序: FZ?:BX^
WrSc@j&Ycv
package org.rut.util.algorithm.support; -pIz-*
\+#EO%sN1%
import org.rut.util.algorithm.SortUtil; %S"85#R5E
]'"Sa<->
/** zPc"r$'0U
* @author treeroot _*>bf G
* @since 2006-2-2 k?;A#L~
* @version 1.0 w-C~ Ik
*/ u}\F9~W-{
public class ImprovedMergeSort implements SortUtil.Sort { o+4/L)h
r/$+'~apTk
private static final int THRESHOLD = 10; w9rwuk
mSp-
/* Kyt.[" p
* (non-Javadoc) puF'w:I(
* GbFLu`Iu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "o2p|2c
*/ x1:+M]Da
public void sort(int[] data) { HgvgO\`]
int[] temp=new int[data.length]; Wb+^Ue
mergeSort(data,temp,0,data.length-1); %0fF_OU
} 1P. W 34
<H<5E'm
private void mergeSort(int[] data, int[] temp, int l, int r) { w<3}(1
int i, j, k; Jkzt=6WZ0
int mid = (l + r) / 2; #s$b\"4
if (l == r) L-hK(W!8pt
return; O$k;p<?M
if ((mid - l) >= THRESHOLD) A{iI,IFe
mergeSort(data, temp, l, mid); D9zw' RY
else }`8g0DPuD9
insertSort(data, l, mid - l + 1); PVP,2Yq!
if ((r - mid) > THRESHOLD) 5cO}Jp%PA
mergeSort(data, temp, mid + 1, r); ^m;dEe&@F
else ,],"tzKtE
insertSort(data, mid + 1, r - mid); r5jiB L~
I+Qv$#S/
for (i = l; i <= mid; i++) { IMIZ#/
temp = data; (Z"QHfO'
} qR4('
for (j = 1; j <= r - mid; j++) { EAn}8#r'(8
temp[r - j + 1] = data[j + mid]; },KY9w
} )67_yHW
int a = temp[l]; 4!p~Mr[E
int b = temp[r]; @[#U_T- I
for (i = l, j = r, k = l; k <= r; k++) { 0,)B~|+
if (a < b) { <h^'x7PkW5
data[k] = temp[i++]; e48`cX\E
a = temp; nr*~R-,\
} else { daf$`
data[k] = temp[j--]; s `HSTq2
b = temp[j]; dya]^L}fL
} s\i=-`
} xoF]r$sC8
} |-4C[5rM
4d4le
/** zvf:*Na")
* @param data #gq4%;
* @param l |Ak>kQJ(1z
* @param i j2# nCU54Z
*/ +5H9mk
private void insertSort(int[] data, int start, int len) { ,C2qP3yg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?jbE3fW
} ;<`F[V Zau
} 0-pLCf
} C`+g:qT
} g66=3c9</6
drP2%u
堆排序： WLW'.
kKVd4B[#*
package org.rut.util.algorithm.support; vA@Kb3,
a]'sby
import org.rut.util.algorithm.SortUtil; JIvVbI
,X(P/x{B
/** -Bbg'=QZa
* @author treeroot v39`ct=e
* @since 2006-2-2 .Gq.st%
* @version 1.0 q4{Pm $OW
*/ 9)0AwLlv
public class HeapSort implements SortUtil.Sort{ RR!(,j^M
^I3cU'X
/* (non-Javadoc) h=SQ]nV{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $r|R`n=
*/ X).UvPZ/
public void sort(int[] data) { F+PIZ%
MaxHeap h=new MaxHeap(); yi<&'L;
h.init(data); F>jPr8&
for(int i=0;i h.remove(); 26JP<&%L
System.arraycopy(h.queue,1,data,0,data.length); /:v+:-lU
} \kcJF'JFA0
u':-DgK
private static class MaxHeap{ \o !
)#k*K9[@
void init(int[] data){ O-Hu:KuIf
this.queue=new int[data.length+1]; r_p9YS@I
for(int i=0;i queue[++size]=data; vF"<r,pg
fixUp(size); }HtP8F8!x
} DLcfOOn1I
} qJ|ByZ.N+
IK5FSN]s/
private int size=0; D}'g4Ag
)~xL_yW_X
private int[] queue; 16/+ O$#y
`GOxFDB.
public int get() { TEz)d=
return queue[1]; cnvxTI<
} L>+g;GJ
p 7IJ3YY
public void remove() { %AW5\ EX
SortUtil.swap(queue,1,size--); =o\:@I[
fixDown(1); 75i M_e\
} LqIMU4Ex
file://fixdown o^dt# &
private void fixDown(int k) { X<@ytHBv
int j; MuB8gSu
while ((j = k << 1) <= size) { nR4L4tdS
if (j < size %26amp;%26amp; queue[j] j++; 3S1V^C-eBx
if (queue[k]>queue[j]) file://不用交换 "wL~E Si
break; q88p~Ccoa
SortUtil.swap(queue,j,k); HVz-i{M
k = j; Pd!;z=I
} UXD?gK1
} C>7Mx{!H
private void fixUp(int k) { L(TO5Y]
while (k > 1) { WS9n.opl}
int j = k >> 1; ;y<)RM
if (queue[j]>queue[k]) ^% BD
break; B[ae<V0k
SortUtil.swap(queue,j,k); *cCr0\Z`
k = j; C.L5\"%
} vM~/|)^0sW
} 1 6;l,@
%(;jx
} Q_QmyD~m
$D5[12X
} wOE_2k
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SortUtil： 5Zs"CDU
A}C&WT~
package org.rut.util.algorithm; 'j#oMA{0
rMxst
import org.rut.util.algorithm.support.BubbleSort; Djx9TBZ5
import org.rut.util.algorithm.support.HeapSort; s=#IoNh
import org.rut.util.algorithm.support.ImprovedMergeSort; a<tUpI$
import org.rut.util.algorithm.support.ImprovedQuickSort; :i0xer
import org.rut.util.algorithm.support.InsertSort; CvmZW$5Yo
import org.rut.util.algorithm.support.MergeSort; 0K>rc1dy
import org.rut.util.algorithm.support.QuickSort; qMYR\4"$
import org.rut.util.algorithm.support.SelectionSort; QI~s~j
import org.rut.util.algorithm.support.ShellSort; ^q"p8
.Y'kDuUu
/** @)&b..c?_
* @author treeroot q9pBS1Ej
* @since 2006-2-2 N;A1e@bP
* @version 1.0 1mOZ\L!m*
*/ 5{#9b^
public class SortUtil { Q !5Tw
public final static int INSERT = 1; tnqW!F~
public final static int BUBBLE = 2; :EHJ\+kejX
public final static int SELECTION = 3; Oq3A#6~
public final static int SHELL = 4; .Udj@{
public final static int QUICK = 5; &* E+N[
public final static int IMPROVED_QUICK = 6; oc^Br~ Th
public final static int MERGE = 7; !!o8N<NU
public final static int IMPROVED_MERGE = 8; |!F5.%PY
public final static int HEAP = 9; !yhh8p3
+S))3 5N[
public static void sort(int[] data) { 6&bIXy
sort(data, IMPROVED_QUICK); . <tq61
} SIKOFs
private static String[] name={ "l >Igm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" smm]6
}; yAN=2fZm
1@gguRF:
private static Sort[] impl=new Sort[]{ A*|cdY]HP
new InsertSort(), 9!><<7TS
new BubbleSort(), &[&r2>a
new SelectionSort(), R=Tqj,6
new ShellSort(), ^_ojR4
new QuickSort(), ?2Kt'1s#
new ImprovedQuickSort(), = P
new MergeSort(), S"wg2X<
new ImprovedMergeSort(), {-A^g!jT&
new HeapSort() kg`.[{k
}; Gy[O)PEEh
Pf F=m'
public static String toString(int algorithm){ >O5m5@GK3a
return name[algorithm-1]; s :`8ZBz~
} ejA%%5q
R1Ye<R!Q
public static void sort(int[] data, int algorithm) { vS;1/->WD
impl[algorithm-1].sort(data); H'qG/@u-l
} ?:Y#Tbi3
45&8weXO:'
public static interface Sort { n8hRaNHl2
public void sort(int[] data); *H[Iq!@
} ?b!Fa
6'W[{gzl
public static void swap(int[] data, int i, int j) { 5 |/9}^T
int temp = data; i55x`>]&sb
data = data[j]; b~BIz95
data[j] = temp; '$ef+@y
} Bb{!Yh].:A
} L^^4=ao0