[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; >Ix)jSNLgo
} 9^3y\@ m
int i1=l; aZ@Ke$jD
int i2=mid+1; n<y!@p^X
for(int cur=l;cur<=r;cur++){ I( G8cK
if(i1==mid+1) \{P(s:
data[cur]=temp[i2++]; X#Ajt/XQ
else if(i2>r) V<?t(_Y
data[cur]=temp[i1++]; sq\oatMw[
else if(temp[i1] data[cur]=temp[i1++]; j^ex5A.& &
else /@Y/(+DE
data[cur]=temp[i2++]; J$v0
} wYOSaGyZ0I
} [D^KM|I%+
}|(KI
} KPs5? X
jx+%X\zokA
改进后的归并排序: A#f@0W:
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package org.rut.util.algorithm.support; )1Z*kY?f!
W{?7Pn?1`
import org.rut.util.algorithm.SortUtil; *R0Ae 4
8 U B?X
/** =VH, i/@
* @author treeroot 9Psy$
* @since 2006-2-2 w*f.Fu(su
* @version 1.0 $ GL$ iA
*/ KaZ$!JfT
public class ImprovedMergeSort implements SortUtil.Sort { P}KyT?X:
2~K.m@U}!Z
private static final int THRESHOLD = 10; bH~ue5q
=ugxPgn
/* BOoLs(p
* (non-Javadoc) '&xv)tno
* K\`L>B. 1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mflH&Bx9
*/ x$cs_q]J
public void sort(int[] data) { ^$4d'
int[] temp=new int[data.length]; 4M}u_}9
mergeSort(data,temp,0,data.length-1); HUfH/x3zj]
} '@3hU|jO!
?A3pXa
private void mergeSort(int[] data, int[] temp, int l, int r) { {]n5h#c 5*
int i, j, k; \8'fy\
int mid = (l + r) / 2; e #>wv]V
if (l == r) 6NVf&;laQ
return; {*r*+}@
if ((mid - l) >= THRESHOLD) k ?X
mergeSort(data, temp, l, mid); QyuSle
else O\,n;oj
insertSort(data, l, mid - l + 1); [u[F6Wst
if ((r - mid) > THRESHOLD) hCQzD2
mergeSort(data, temp, mid + 1, r); fq~<^B
else k^}8=,j}
insertSort(data, mid + 1, r - mid); >t<FG2
c8v+eyn
for (i = l; i <= mid; i++) { ?H#]+SpOcv
temp = data; (A}##h
} ;3s_#L
for (j = 1; j <= r - mid; j++) { L 5J=+k,
temp[r - j + 1] = data[j + mid]; =cs;avtL
} 4=9To|U*
int a = temp[l]; Ix93/FAn
int b = temp[r]; qrsPY d
for (i = l, j = r, k = l; k <= r; k++) { BQ2EDy=}6
if (a < b) { <]r.wn=}M
data[k] = temp[i++]; cor?#
a = temp; Yc/Nz(m
} else { k-@CcrepF
data[k] = temp[j--]; TPZZln'3
b = temp[j]; /d ?)
} rDX_$,3L
} z_~5c
} UN>!#Ji:$
snT!3t
/** +R@5e+auQ.
* @param data K'+GK S7.
* @param l *Em 9R
* @param i [ Lt1OdGl
*/ .iNPLz1
private void insertSort(int[] data, int start, int len) { AF g*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w4H3($ K
} _Pjo9z 9
} (1T2?mO
} qba<$
} T]l_B2.
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堆排序： "Sz pFw
()6)|A<^U
package org.rut.util.algorithm.support; D^W6Cq5\
/-TJtR4>
import org.rut.util.algorithm.SortUtil; ,ilVt
?dP3tLR
/** 5M4mFC6
* @author treeroot (.-3q;)6
* @since 2006-2-2 uvz}qH@j/Q
* @version 1.0 /Y_F"GQ
*/ Ml1yk)3G
public class HeapSort implements SortUtil.Sort{ ER~m &JI
4J Bm|Pf(
/* (non-Javadoc) >Ip>x!wi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )T/"QF}<T
*/ {y0#(8-&
public void sort(int[] data) { 9!zUv:;
MaxHeap h=new MaxHeap(); ("<3w2Vlh
h.init(data); r+-KrO'
for(int i=0;i h.remove(); Pf5RlpL:p
System.arraycopy(h.queue,1,data,0,data.length); +VE }c
} qMD6LWJ
-H5n>j0!{
private static class MaxHeap{ Wu(6FQ`H
SV}q8z\
void init(int[] data){ rC V&&09
this.queue=new int[data.length+1]; 9oKRnc
for(int i=0;i queue[++size]=data; JG @bl
fixUp(size); rT9<_<
} mE^mQ [Dk
} 6"U&i9
[hSE^ m
private int size=0; Q]9H9?}N?
fz#e4+oH
private int[] queue; R h zf.kp
vU0j!XqE
public int get() { OQ;'Xo
return queue[1]; Oaf!\z}
} I9O!CQCTt
ac%%*HN,
public void remove() { ,R]hNjs-{
SortUtil.swap(queue,1,size--); `W,gYH7
fixDown(1); 6AV@O
} KoVy,@
file://fixdown cf)2GoV>e
private void fixDown(int k) { 0(\ybppx
int j; S^'?sfq
while ((j = k << 1) <= size) { (dn(:<_$
if (j < size %26amp;%26amp; queue[j] j++; dmI,+hHtL
if (queue[k]>queue[j]) file://不用交换 ;S5*n:d
break; h^h,4H\r
SortUtil.swap(queue,j,k); fYU/Jn#
k = j; OBaG'lrZy
} &0Yv*,4]
} Nv}'"V>
private void fixUp(int k) { H~UxVQLPp
while (k > 1) { ykcW>h
int j = k >> 1; 6!7LgM%4
if (queue[j]>queue[k]) c+chwU0W
break; t &XH:w&j
SortUtil.swap(queue,j,k); )u?pqFH
k = j; +X6xCE
} P6V_cw$
} 8wz%e(
t:NTk(
} vn<z\wVbf
g]?&qF}
} qDZ?iTHQq
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SortUtil： gjB36R
}PdS?[R
package org.rut.util.algorithm; 7wS)'zR;
+M-x*;.
import org.rut.util.algorithm.support.BubbleSort; yx?Z&9z <
import org.rut.util.algorithm.support.HeapSort; "\M16N
import org.rut.util.algorithm.support.ImprovedMergeSort; b@j**O>[q)
import org.rut.util.algorithm.support.ImprovedQuickSort; 5>+>=)*
import org.rut.util.algorithm.support.InsertSort; 'X&sH/>r
import org.rut.util.algorithm.support.MergeSort; ov&4&v
import org.rut.util.algorithm.support.QuickSort; VL=.JwK
import org.rut.util.algorithm.support.SelectionSort; ;1PnbU b
import org.rut.util.algorithm.support.ShellSort; O|j(CaF
1H sfCky{
/** ?RL[#d+y
* @author treeroot ):HjpJvF
* @since 2006-2-2 4TcKs}z
* @version 1.0 &1)4B
*/ U5Say3r
public class SortUtil { R&}"En`$s
public final static int INSERT = 1; F|p&v7T
public final static int BUBBLE = 2; )N h67P3X"
public final static int SELECTION = 3; ({JXv
public final static int SHELL = 4; eaLSq
public final static int QUICK = 5; &5>R>rnB
public final static int IMPROVED_QUICK = 6; 0gdFXh$!e
public final static int MERGE = 7; (XW\4msB)I
public final static int IMPROVED_MERGE = 8; 6d/;GyG
public final static int HEAP = 9; AuIb>@a
iIWz\FM
public static void sort(int[] data) { 5|S|S))_Q
sort(data, IMPROVED_QUICK); :{@&5KQ8)
} s%F}4W2s
private static String[] name={ ArWMbT>Zqw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6UK{0\0
}; mYLqT$t.+
`B6~KZ
private static Sort[] impl=new Sort[]{ l_tr,3_w
new InsertSort(), \HX'^t`
new BubbleSort(), W" >[sn|
new SelectionSort(), LV|ZZ.d h
new ShellSort(), faQ}J%a
new QuickSort(), qgREkb0
new ImprovedQuickSort(), XFpII45
new MergeSort(), )yvI {
new ImprovedMergeSort(), c'M#va
new HeapSort() #x-@ >{1k&
}; 1@Abs
4CA(` _i~
public static String toString(int algorithm){ '.Iz*%"
return name[algorithm-1]; k"_i7
} :lj1[q:Y>
Y_m/? [:
public static void sort(int[] data, int algorithm) { A&EVzmj-+X
impl[algorithm-1].sort(data); >iD&n4TK
} egQB!%D
W4n;U-Hb
public static interface Sort { {A2EGUmF2
public void sort(int[] data); xs+pCK|
} Ia_I~ U$
*Ju$A
public static void swap(int[] data, int i, int j) { Py2AnpYa
int temp = data; 7|4t;F!
data = data[j]; ]7<}EG
data[j] = temp; e8T#ZWr*
} 69#mj*p@+
} mS?.xu