[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; Y5LESZWo
} sBp|Lo
int i1=l; FsZM_0>/s
int i2=mid+1; 4s*P5w_'/
for(int cur=l;cur<=r;cur++){ Mr:*l`b_
if(i1==mid+1) lj%8(Xu
data[cur]=temp[i2++]; `(aU_r=
else if(i2>r) 4,f[D9|:
data[cur]=temp[i1++]; (]j*)~=V
else if(temp[i1] data[cur]=temp[i1++]; M "p6xp/
else S|;a=K&hS
data[cur]=temp[i2++]; YU76(S9 0#
} BieII$\P%P
} {d(PH7R
c}vy9m$B_
} tZ>>aiI3
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改进后的归并排序: WlP@Tm5g/
jLvI!q
package org.rut.util.algorithm.support; 7|zt'.56[
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import org.rut.util.algorithm.SortUtil; P,h@F+OZN
_ %&"4bm.
/** )ACa0V>*p
* @author treeroot vJGxD\h
* @since 2006-2-2 v Xio1hu
* @version 1.0 [k-7Kq
*/ 8q7KqYu
public class ImprovedMergeSort implements SortUtil.Sort { <t]c'
EBzg<-?o
private static final int THRESHOLD = 10; bXq,iX
2 T{PIJg3
/* \, n'D
* (non-Javadoc) (#c5Q&
* _'n;rZ+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !QVd'e
*/ R ;5w*e}?5
public void sort(int[] data) { iBJ*6orz
int[] temp=new int[data.length]; *sJx0<!M}
mergeSort(data,temp,0,data.length-1); F&lc8
} ScGmft3A
9Lz)SYd
private void mergeSort(int[] data, int[] temp, int l, int r) { IvIBf2D;Q
int i, j, k; spO?5#
int mid = (l + r) / 2; o~P8=1t
if (l == r) 3}g?d/^E3
return; (]1le|+
if ((mid - l) >= THRESHOLD) E\m?0]W|
mergeSort(data, temp, l, mid); i04Sf^
else Si]Z`_
insertSort(data, l, mid - l + 1); Xki/5roCQ|
if ((r - mid) > THRESHOLD) (/"T=`3t
mergeSort(data, temp, mid + 1, r); rF~q"9
else +*0THol-
insertSort(data, mid + 1, r - mid); |&n dQ(!l
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for (i = l; i <= mid; i++) { O-T/H-J`
temp = data; u.hnQsM
} =5Q;quKu^5
for (j = 1; j <= r - mid; j++) { fbuop&FN+q
temp[r - j + 1] = data[j + mid]; r@%32h
} :Yz.Bfli
int a = temp[l]; }T,E$vsx
int b = temp[r]; D4#,9?us
for (i = l, j = r, k = l; k <= r; k++) { &KR@2~vE
if (a < b) { 3pDZ}{ZZU
data[k] = temp[i++]; CQ,r*VAw
a = temp; =j;o, J:(
} else { /u:Sn=SPd
data[k] = temp[j--]; 3}twWnQZJ
b = temp[j]; 1}ZBj%z4l
} /4~RlXf@
} pNiqb+^nz
} 7KM!\"PM
_IlL'c5
/** 0l 3RwWj
* @param data /-|xxy
* @param l 3&' STPpW
* @param i 1~7y]d?%
*/ MeplM$9
private void insertSort(int[] data, int start, int len) { +Z;0"'K'e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +'#d*r91@
} 3^ Z tIZ
} tQ&#FFt,)
} uDoSe^0
} 7gQt k
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堆排序： A{+ZXu}
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package org.rut.util.algorithm.support; wkm SIN:
^E:;8h4$9
import org.rut.util.algorithm.SortUtil; .!6ufaf$
nQ~q-=,L
/** uwQ4RYz
* @author treeroot ,MvvW{EY
* @since 2006-2-2 MPL2#YU/a
* @version 1.0 1}ToR=
*/ [e^i".
public class HeapSort implements SortUtil.Sort{ O0$ijJa|
hR`dRbBi%
/* (non-Javadoc) R>0ta Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?1412Tq5
*/ +M.|D,wg2
public void sort(int[] data) { rW6w1
MaxHeap h=new MaxHeap(); 5N|77AAxK
h.init(data); ]B7t9l
for(int i=0;i h.remove(); F H%yyT
System.arraycopy(h.queue,1,data,0,data.length); _%L3?PpF"
} X@D3
E;|\?>
private static class MaxHeap{ XqwdJND
n&V(c&C
void init(int[] data){ dF?pEet?2
this.queue=new int[data.length+1]; 4@W.{|2~
for(int i=0;i queue[++size]=data; #{?oUg>$
fixUp(size); _|Dt6
} !EW]:u
} oNh .Zgg
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private int size=0; ,}|V'y
?<}qx`+%Q
private int[] queue; .ZJh-cd
d z\b]H]
public int get() { Wex4>J<`/
return queue[1]; ypifXO;m7
} 7SM/bJ-M#
6/n;u{|
public void remove() { mcR!P~"i
SortUtil.swap(queue,1,size--); 4{Ak|
fixDown(1); p_nrua?
} #]'V#[;~
file://fixdown w'eenIX^^
private void fixDown(int k) { QMsnfG
int j; (J;?eeP
while ((j = k << 1) <= size) { 50Jr(OeU<
if (j < size %26amp;%26amp; queue[j] j++; ujSzm=_P
if (queue[k]>queue[j]) file://不用交换 _HL3XT
break; r\1*N.O3|O
SortUtil.swap(queue,j,k); TDseWdA
k = j; DxD0iJ=W
} FG(`&S+,
} V,"'k<y
private void fixUp(int k) { GkO6r'MVE
while (k > 1) { oy'+n-
int j = k >> 1; YS~x-5OE\
if (queue[j]>queue[k]) }v!6BU6<Q
break; 0qZ)$YKq
SortUtil.swap(queue,j,k); g[n8N{s
k = j; Lr~K3nb
} Eg:p_F*lr
} Y\=:j7'
3k(?`4JJ
} S`^W#,rj
9c6V&b
} Qp54(`
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SortUtil： th<]L<BP/
M#p,Z F
package org.rut.util.algorithm; 'GyPl
=1(BKk>
import org.rut.util.algorithm.support.BubbleSort; Qi}LV"&L
import org.rut.util.algorithm.support.HeapSort; ][mc^eI0s|
import org.rut.util.algorithm.support.ImprovedMergeSort; j AE0$u~.
import org.rut.util.algorithm.support.ImprovedQuickSort; ,jWd?-NH
import org.rut.util.algorithm.support.InsertSort; X>4`{x`
import org.rut.util.algorithm.support.MergeSort; 9..k/cH
import org.rut.util.algorithm.support.QuickSort; a]k&$
import org.rut.util.algorithm.support.SelectionSort; +OmSR*fA0
import org.rut.util.algorithm.support.ShellSort; ;n@C(hG
`iI"rlc
/** 525>=h
* @author treeroot ]3,0 8JW=
* @since 2006-2-2 *X #e
* @version 1.0 P(;c`
*/ Gpu?z-)
public class SortUtil { E~P0}'
public final static int INSERT = 1; !O-+h0Z
public final static int BUBBLE = 2; YPc<
public final static int SELECTION = 3; rZv+K/6*M
public final static int SHELL = 4; ,Aii>D]
public final static int QUICK = 5; abnd U,s
public final static int IMPROVED_QUICK = 6; NjxW A&[ng
public final static int MERGE = 7; g@k9w{_
public final static int IMPROVED_MERGE = 8; xNkY'4%
public final static int HEAP = 9; G= cxc_9
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public static void sort(int[] data) { D3{lyi|8
sort(data, IMPROVED_QUICK); 81cmG`G7
} *F*X_O
private static String[] name={ 7 L\?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W<VHv"?V
}; B6\VxSX4{
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private static Sort[] impl=new Sort[]{ sCQup^\
new InsertSort(), l`&6W?C
new BubbleSort(), [r8 d+
new SelectionSort(), >EtP^Lu~f_
new ShellSort(), j*4S]!
new QuickSort(), Nh9!lBm*]
new ImprovedQuickSort(), }!V<"d,!
new MergeSort(), !^fR8Tp9
new ImprovedMergeSort(), ; ZV^e
new HeapSort() acY[?L_6J
}; gc3 U/ jM
"n }fEVJ,
public static String toString(int algorithm){ /'6[*]IZP
return name[algorithm-1]; Ko)T>8:
} 43=-pyp
y%bqeo L~
public static void sort(int[] data, int algorithm) { D{c>i`\G
impl[algorithm-1].sort(data); %@93^q[\2
} _np>({
h_G|.7!
public static interface Sort { */dh_P<Yj
public void sort(int[] data); Y~hd<8 ~
} AJlIA[Kt:
2G5!u)
public static void swap(int[] data, int i, int j) { Pq\V($gN
int temp = data; iH}rI'U.
data = data[j]; T.PZ}4
data[j] = temp; k;AiG8jb
} sFM>gG
} %802H%+