[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; 5My4a9
} ]!CMo+
int i1=l; KUJCkwQ
int i2=mid+1; )` ~"o*M
for(int cur=l;cur<=r;cur++){ UMtnb:ek
if(i1==mid+1) :%G_<VAo!
data[cur]=temp[i2++]; rlxZ,]ul
else if(i2>r) m1bkY#\ U|
data[cur]=temp[i1++]; FQY{[QvF~
else if(temp[i1] data[cur]=temp[i1++]; t5O '7x
else AXnRAW
data[cur]=temp[i2++]; ^m0nInH
} BoJpf8e'-e
} ;]v{3m
dfy]w4ETB
} 2<$pai"yl
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改进后的归并排序: r2ZSkP.
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package org.rut.util.algorithm.support; we:P_\6
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import org.rut.util.algorithm.SortUtil; 1t+uMhy*y
V.w L
/** l,fwF ua
* @author treeroot 3+[;
* @since 2006-2-2 ;Mw<{X-
* @version 1.0 <C1w?d$9I
*/ 6JgbJbUi
public class ImprovedMergeSort implements SortUtil.Sort { t,NE`LC
G*s5GG@Z.
private static final int THRESHOLD = 10; d+qeZGg^A
xig4H7V
/* J]W? Vvv
* (non-Javadoc) vzX%x ul
* xs 1V?0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U8S<wf&
*/ Cl6P,C
public void sort(int[] data) { @[LM8 @:
int[] temp=new int[data.length]; ^O.` P
mergeSort(data,temp,0,data.length-1); _<Ip0?N
} Sq]VtQ(
t5CJG'!ql
private void mergeSort(int[] data, int[] temp, int l, int r) { <=~*`eWV
int i, j, k; @Os0A
int mid = (l + r) / 2; g& ou[_A
if (l == r) f4O}WU}l{s
return; '7<^x>D|
if ((mid - l) >= THRESHOLD) Xv+!)j<
mergeSort(data, temp, l, mid); Ts\PZQ!q
else `*o ko[\3
insertSort(data, l, mid - l + 1); ,\-4X
if ((r - mid) > THRESHOLD) 5d;(D i5z
mergeSort(data, temp, mid + 1, r); Z*R~dHr
else 8UzF*gS
insertSort(data, mid + 1, r - mid); ~#jnkD
c8N pk<
for (i = l; i <= mid; i++) { !<&To
temp = data; ~\*wt(o
} *:%I|5
for (j = 1; j <= r - mid; j++) { RDU 'l^
temp[r - j + 1] = data[j + mid]; Sim$:5P
} 33ZHrZ
int a = temp[l]; HHerL%/
int b = temp[r]; B qo#cnlG
for (i = l, j = r, k = l; k <= r; k++) { i# fvF)
if (a < b) { l1.eAs5U
data[k] = temp[i++]; ?pdN!zOeL
a = temp; TtrV -X>L
} else { B1j^qoC.5
data[k] = temp[j--]; )8taMC:H^
b = temp[j]; |2GrOM&S
} z%]3`_I
} , {}S<^?]
} Uw?25+[b
2J Wp5
/** *'BI=*`
* @param data )h]tKYx
* @param l b)>l7nOc
* @param i M<x><U#]A
*/ *&5./WEOH
private void insertSort(int[] data, int start, int len) { [U$`nnp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &Z}}9dd
} (SCZ.G(>
} qP+%ui5xR
} +jN)$Y3Ya
} Y3ypca&P9
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堆排序： _QtW)\)5\
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package org.rut.util.algorithm.support; .B!L+M< [
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import org.rut.util.algorithm.SortUtil; )"Wy/P
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/** J=H8^4M
* @author treeroot PkOtg[Z
* @since 2006-2-2 &!*p>Ns)e
* @version 1.0 e63io0g>
*/ m~@Lt~LZs
public class HeapSort implements SortUtil.Sort{ OYOczb]
B~3qEdoK5`
/* (non-Javadoc) RRtOBrIedI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ut(BQM>U+$
*/ V^\b"1X7N
public void sort(int[] data) { ]Gl5Qf:+z
MaxHeap h=new MaxHeap(); gT|&tTS1@
h.init(data); ]2z Gb5s"
for(int i=0;i h.remove(); rjHW
System.arraycopy(h.queue,1,data,0,data.length); %"3tGi:/
} <$%Y#I'zX
I -XkxDw
private static class MaxHeap{ 7D4I>N'T
VjSA&R
void init(int[] data){ Y2>*' nU
this.queue=new int[data.length+1]; ibgF,N
for(int i=0;i queue[++size]=data; ^p~3H
fixUp(size); 8=3$U+
} z"!=A}i
} (XQl2C
%U$%x
private int size=0; Z15b'^)?9
t<qXXQ&5
private int[] queue; T)cbpkH4
}}v28"\TA
public int get() { ld'Aaxl&
return queue[1]; ^^(4xHN
} YfH+kDT
SVT'fPm1M
public void remove() { f>+:UGmP
SortUtil.swap(queue,1,size--); u=B,i#>s
fixDown(1); [M:BJ%*
} K9UWyM<(2C
file://fixdown _+nlm5
private void fixDown(int k) { tP/R9Ezp
int j; TGozoPV
while ((j = k << 1) <= size) { 96CC5
if (j < size %26amp;%26amp; queue[j] j++; L3X[; |v}
if (queue[k]>queue[j]) file://不用交换 RkBbu4uQ-
break; n5 jzVv
SortUtil.swap(queue,j,k); GwZ(3
k = j; wz5*?[4
} @&]%%o+
} r1X\$&
private void fixUp(int k) { J9/}ZD^
while (k > 1) { 54, (;
int j = k >> 1; L-(.v*
if (queue[j]>queue[k]) V$<5`
break; R>. %0%iq
SortUtil.swap(queue,j,k); J;7O`5J
k = j; 2M+'9+k~
} [0mg\n?
} E14Dq#L
/ L/hR4
} xA2"i2k9
GFBku^pi
} V3$Yr"rZ;
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SortUtil： Ox1#}7`0>
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package org.rut.util.algorithm; :;]iUjiC8
mdTCe HX
import org.rut.util.algorithm.support.BubbleSort; \4OX]{
import org.rut.util.algorithm.support.HeapSort; * "Z5bKL
import org.rut.util.algorithm.support.ImprovedMergeSort; UMbM3m=\
import org.rut.util.algorithm.support.ImprovedQuickSort; $.2#G"|
import org.rut.util.algorithm.support.InsertSort; qKg*/)sD(
import org.rut.util.algorithm.support.MergeSort; I ;Sm<P7*
import org.rut.util.algorithm.support.QuickSort; jRP9e
import org.rut.util.algorithm.support.SelectionSort; P6ztP$M(
import org.rut.util.algorithm.support.ShellSort; B#T4m]E/
/!mF,oR!
/** aqk0+
* @author treeroot ?@i_\<A2
* @since 2006-2-2 vC9Qe ]f
* @version 1.0 54%@q[-
*/ 3b2[i,m<L
public class SortUtil { i/%+x-#
public final static int INSERT = 1; M3U*'A\
public final static int BUBBLE = 2; j:;[Y`2
public final static int SELECTION = 3; eJJD'Z
public final static int SHELL = 4; jr<`@
public final static int QUICK = 5; MM*B.y~TxZ
public final static int IMPROVED_QUICK = 6; aIl}|n"
public final static int MERGE = 7; D 1Q@4 g
public final static int IMPROVED_MERGE = 8; ^"e|)4_5\
public final static int HEAP = 9; ^T#bla893
ju-tx :
public static void sort(int[] data) { -<[MM2Y
sort(data, IMPROVED_QUICK); Ip0~
} ?W*{%my
private static String[] name={ +EZ Lic
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -r6cK,WVU
}; :4f>S)m
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private static Sort[] impl=new Sort[]{ _qq> 43
new InsertSort(), -.>b7ui
new BubbleSort(), Z-fQ{&a{
new SelectionSort(), avmuI^LLs
new ShellSort(), fZqqU|tq
new QuickSort(), LX [_6
new ImprovedQuickSort(), s\k4<d5
new MergeSort(), =z5'A|Wa=,
new ImprovedMergeSort(), OO Hw-MW
new HeapSort() R aVOZ=^-
}; !\ IgTt,
7hs1S|
public static String toString(int algorithm){ []'gIF
return name[algorithm-1]; eDh]uKg
} 2qw-:
JumZ>\'p(
public static void sort(int[] data, int algorithm) { 3C,G~)= x
impl[algorithm-1].sort(data); s#%$aQ|Fp
} 6zmt^U
0W92Z@_GY
public static interface Sort { e7m>p\"
public void sort(int[] data); L\cd=&b`
} Wchu-]
F;4*,Ap
public static void swap(int[] data, int i, int j) { 6zo'w Wc3
int temp = data; S>-x<'Os
data = data[j]; RZ(*%b<C
data[j] = temp; {XHAQ9'
} XX85]49`%
} WrA!'I