[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; wNNInS6
} Q~p)@[q
int i1=l; 7FQ&LF46
int i2=mid+1; G[;GP0\N
for(int cur=l;cur<=r;cur++){ A>C&`A=-
if(i1==mid+1) _zuaImJ0o
data[cur]=temp[i2++]; `a$c6^a
else if(i2>r) HUP~
data[cur]=temp[i1++]; H%`$@U>
else if(temp[i1] data[cur]=temp[i1++]; ef !@|2
else SVJL|S3k
data[cur]=temp[i2++]; O %x<
} > T$M0&<
} ^(w%m#
5uo?KSX%
} u ZzO$e
H K]-QTEn
改进后的归并排序: pJnT \~o
NU]+ {7
package org.rut.util.algorithm.support; "L?h@8sa
o7_*#5rD
import org.rut.util.algorithm.SortUtil; @ )bCh(u
D90.z"N\i9
/** {c(@u6l28
* @author treeroot BVJ6U[h`
* @since 2006-2-2 5mtsN#
* @version 1.0 D7X8yv1
*/ &3@{?K
public class ImprovedMergeSort implements SortUtil.Sort { IdHydY1
%a'Nf/9=:
private static final int THRESHOLD = 10; <`PW4zSI
Za"m;+H<E
/* !Dc|g~km\
* (non-Javadoc) V:YN!
* ~!t#M2Sk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E~4d6~s
*/ RWX?B
public void sort(int[] data) { 3Ygt!
int[] temp=new int[data.length]; \/wbk`2
mergeSort(data,temp,0,data.length-1); sxP1.= W
} vO?\u`vY
>+/2g
private void mergeSort(int[] data, int[] temp, int l, int r) { <~d3L4h*<
int i, j, k; B IW?/^
int mid = (l + r) / 2; Zk={3Y
if (l == r) ekR/X
return; tPQjjoh
if ((mid - l) >= THRESHOLD) o(gEyK
mergeSort(data, temp, l, mid); \#yKCA';
else =x &"aF1
insertSort(data, l, mid - l + 1); {E 'go]
if ((r - mid) > THRESHOLD) hOOkf mOM
mergeSort(data, temp, mid + 1, r); \me'B {aa
else y;GwMi$KI
insertSort(data, mid + 1, r - mid); g,k} nkIT
rDD,eNjG
for (i = l; i <= mid; i++) { }ldOxJSB?
temp = data; ;2&ym)`
} :l;SG=scx
for (j = 1; j <= r - mid; j++) { w3<%wN>tE
temp[r - j + 1] = data[j + mid]; 0gIJ&h6*f
} ?q*,,+'0
int a = temp[l]; r;7&U<j~Z
int b = temp[r]; ]ChGi[B~9
for (i = l, j = r, k = l; k <= r; k++) { ]%Db%A
if (a < b) { :`Z'vRj
data[k] = temp[i++]; m9Pzy^g1
a = temp; ='[J.
} else { \nzaF4+$
data[k] = temp[j--]; C"gH>G
b = temp[j]; gP13n!7
} 3g{T+c*
} ;^"#3_7T]
} SjmWlf,
ozCH1V{p
/** cns~)j~
* @param data 5McOSy
* @param l U65a_dakk
* @param i SK]"JSY`
*/ ]lgI Q;r
private void insertSort(int[] data, int start, int len) { W3gBLotdg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Vlf=gP
} us,~<e0
} |eu:qn8
} *a[iq`499
} 8q"C=t7
(Qp53g
堆排序： (c\i.z
&OXWD]5$6
package org.rut.util.algorithm.support; G@(ukt`0}
!A|ayYBb\
import org.rut.util.algorithm.SortUtil; %&81xAt
4e!>A
/** M3EB=tU
* @author treeroot l`b%imX
* @since 2006-2-2 &UextGk7
* @version 1.0 ^}{`bw{
*/ ]nQC
public class HeapSort implements SortUtil.Sort{ DxvD 1u
wRCv?D`vV
/* (non-Javadoc) M~O$,dof
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +8zCol?j
*/ BXxl-x
public void sort(int[] data) { P-LdzVt(^
MaxHeap h=new MaxHeap(); )zMsKfQ
h.init(data); cg|C S?
for(int i=0;i h.remove(); D&]dlY@*
System.arraycopy(h.queue,1,data,0,data.length); F<Y>
} WWtksi,
([Da*Tk*
private static class MaxHeap{ h4,S/n
CY?19Ak-xd
void init(int[] data){ :&-j{8p-
this.queue=new int[data.length+1]; p(6!7t:
for(int i=0;i queue[++size]=data; An2Wj
fixUp(size); 6?uo6 I
} lD]/Kx
} *D:"I!Ho
&`}8Jz=S
private int size=0; T/YvCbo
IPxK$nI^
private int[] queue; \*r]v;NcP
Y5XhV;16
public int get() { nu!tk$Q
return queue[1]; G@+AB*Eu
} Lk8NjK6
YYi:d=0<SO
public void remove() { mcm8|@Y{
SortUtil.swap(queue,1,size--); us2RW<Oxv
fixDown(1); AfqthI$*m
} R;3Tyn+
file://fixdown ,nnVHBN
private void fixDown(int k) { ;z3w#fNMv
int j; tEC`->|
while ((j = k << 1) <= size) { ]*\m@lWu
if (j < size %26amp;%26amp; queue[j] j++; p J#<e
if (queue[k]>queue[j]) file://不用交换 3A)Ec/;~
break; ]R7zvcu&
SortUtil.swap(queue,j,k); t9Y?0O}/
k = j; >SSRwYIN
} OO /Pc
} kA/V=xO<
private void fixUp(int k) { \66j4?H#
while (k > 1) { 0<4Swj3s7
int j = k >> 1; m!H7;S-(
if (queue[j]>queue[k]) l99{eD
break; p(`?y:.3
SortUtil.swap(queue,j,k); 2[e^mm&.
k = j; ge@KopZ&
} kE*OjywN
} "U6:z M
pU)g93
} qR>"r"Fq
D8r=Vf
} ??g`c=R!V
18{" @<wIs
SortUtil： -<RG'I~
Smjg[
package org.rut.util.algorithm; 48t_?2>
=j$!N# L
import org.rut.util.algorithm.support.BubbleSort; %Tvy|L ,
import org.rut.util.algorithm.support.HeapSort; ET:B"
import org.rut.util.algorithm.support.ImprovedMergeSort; !ZC0n`
import org.rut.util.algorithm.support.ImprovedQuickSort; tw?\bB
import org.rut.util.algorithm.support.InsertSort; ")?NCun>
import org.rut.util.algorithm.support.MergeSort; A"W}l)+X
import org.rut.util.algorithm.support.QuickSort; gZ&' J\
import org.rut.util.algorithm.support.SelectionSort; C?47v4n-'
import org.rut.util.algorithm.support.ShellSort; 0{'%j~"
X GhV? tA
/** I6B4S"Q5<
* @author treeroot Rb=8(#
* @since 2006-2-2 hq[RU&\
* @version 1.0 >~)IsQ*%
*/ \8HLQly|@
public class SortUtil { 'V-_3WWxU
public final static int INSERT = 1; 7Ew.6!s#n1
public final static int BUBBLE = 2; xOgUX6n
public final static int SELECTION = 3; @c{rqa v
public final static int SHELL = 4; V/@?KC0B5
public final static int QUICK = 5; ,U?W
public final static int IMPROVED_QUICK = 6; 6~b]RZe7
public final static int MERGE = 7; cV+x.)a.
public final static int IMPROVED_MERGE = 8; 0A.PfqYi
public final static int HEAP = 9; WymBjDos:
YnLwBJ2i
public static void sort(int[] data) { L^Q q[>
sort(data, IMPROVED_QUICK); rh%-va9
} XDM~H
private static String[] name={ '<v_YxEn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !/|^ )d^U
}; `kERM-@A
xw5LPz;B
private static Sort[] impl=new Sort[]{ M!nwcxB!
new InsertSort(), Z.v2!u
new BubbleSort(), Ag#o&Y
new SelectionSort(), MV.$Ay
new ShellSort(), }?vVJm'
new QuickSort(), 0*-nVC1
new ImprovedQuickSort(), RxZ#`$F
new MergeSort(), ))z1T8
new ImprovedMergeSort(), $hM>%u
new HeapSort() ~~D =Z#
}; u>U4w68
\XI9 +::%
public static String toString(int algorithm){ 057$b!A-a
return name[algorithm-1]; h~zG*B5F
} |m5 E%E
4X^{aIlshk
public static void sort(int[] data, int algorithm) { _#mo6')j
impl[algorithm-1].sort(data); v7kR]HU[y
} sKLH.@
S7_^E
public static interface Sort { 2*<'=*zaQ
public void sort(int[] data); 5f'<0D;K
} 3jG #<4;J
yk<$XNc
public static void swap(int[] data, int i, int j) { @T6Z3Zj}
int temp = data; jj&4Sv#>
data = data[j]; |>2IgTh1a
data[j] = temp; eJm7}\/6`
} buv*qPO
} ^twJNm{99