[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; @ob4y
} /1R` E9
int i1=l; %^ z##7^
int i2=mid+1; z6f N)kw
for(int cur=l;cur<=r;cur++){ Uel^rfE`
if(i1==mid+1) 7"0l>0 \
data[cur]=temp[i2++]; Y6r<+#V
else if(i2>r) "de3Sbj@?
data[cur]=temp[i1++]; $m)[> C
else if(temp[i1] data[cur]=temp[i1++]; \>@QJ
else LIZsDTU
data[cur]=temp[i2++]; 9j~|m
} 8C(@a[V
} p&|:,|jo5
^B`*4
} /6PL
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改进后的归并排序: {,`)
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package org.rut.util.algorithm.support; heN?lmC
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import org.rut.util.algorithm.SortUtil; (h3f$
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/** m^M sp:T,
* @author treeroot LWp#i8,
* @since 2006-2-2 <+\ w.!
* @version 1.0 PBo;lg`
*/ jj$D6f/mOG
public class ImprovedMergeSort implements SortUtil.Sort { Kk?C
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private static final int THRESHOLD = 10; r{pbUk
+J<igb!S
/* "q,.O5q}Y
* (non-Javadoc) :G\X
* `C+>PCO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zF-R$_]av
*/ ^vA"3Ixb!
public void sort(int[] data) { 2LqJ.HH
int[] temp=new int[data.length]; / 80Q
mergeSort(data,temp,0,data.length-1); D`e6#1DbJ
} w#Di
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private void mergeSort(int[] data, int[] temp, int l, int r) { MaS"V`NI
int i, j, k; ,VdNP
int mid = (l + r) / 2; UcI;(Va
if (l == r) P/e6b .M
return; oZCjci-
if ((mid - l) >= THRESHOLD) kl0|22"Gz
mergeSort(data, temp, l, mid); Z| f~
else fDU_eyt/Z'
insertSort(data, l, mid - l + 1); -Y=o
if ((r - mid) > THRESHOLD) {^jk_G\ys
mergeSort(data, temp, mid + 1, r); KdTDBC
else J%mtlA
insertSort(data, mid + 1, r - mid); &4R-5i2a
]XS[\qo
for (i = l; i <= mid; i++) { $(=0J*ND"
temp = data; ObyF~j}j
} =)Z~w`
for (j = 1; j <= r - mid; j++) { L55VS:'
temp[r - j + 1] = data[j + mid]; OKO+(>AQ
} px>g
int a = temp[l]; 76BA1x+G
int b = temp[r]; Mr6q7
for (i = l, j = r, k = l; k <= r; k++) { 8`GN8F
if (a < b) { YM<F7tp4
data[k] = temp[i++]; fUV;3du
a = temp; MLk%U 4
} else { T}r}uw`
data[k] = temp[j--]; C=zc6C,
b = temp[j]; Vu1swq)l
} cI/Puh^3
} L2}p<?f
} tB/'3#o
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/** 3@8Zy:[8<
* @param data YU6D;
* @param l FesUE_L2$
* @param i z5q(
*/ r t\eze_5A
private void insertSort(int[] data, int start, int len) { sOb=+u$$9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o)r%4YOL
} Fsi;[be$A
} x$+g/7*
} <S@XK%
} GX,)~Syw*
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堆排序： MNWuw;:v
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package org.rut.util.algorithm.support; ,WgEl4
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import org.rut.util.algorithm.SortUtil; d6vls7J/4
/&!4oBna
/** GS&iSjw
* @author treeroot ]!'9Y}9a
* @since 2006-2-2 lSK<LytB
* @version 1.0 7I;A5f
*/ ka?EXF:
public class HeapSort implements SortUtil.Sort{ E;-*LT&{
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/* (non-Javadoc) y@2$sK3K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3\E G
*/ .g8db d
public void sort(int[] data) { :=e"D;5
MaxHeap h=new MaxHeap(); } 3JOC!;;
h.init(data); 1T/ 72+R0
for(int i=0;i h.remove(); cu )w6!f
System.arraycopy(h.queue,1,data,0,data.length); " gQJeMU
} (pT7m
t~kh?u].j
private static class MaxHeap{ Q~zs]{\
Y wu > k
void init(int[] data){ Y |'}VU
this.queue=new int[data.length+1]; .)[0yW&
for(int i=0;i queue[++size]=data; HMl M!Xk?
fixUp(size); s]'EIw}mo
} K6G+sBw[
} +Z1y1%a
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private int size=0; A?4s+A@Eg
#iVr @|,
private int[] queue; F/w*[Xi Sh
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public int get() { :7[4wQDt4
return queue[1]; HJ0Rcw%
} <gu>06
\Y^GA;AMQQ
public void remove() { h)pYV>!d
SortUtil.swap(queue,1,size--); )JXy>q#
fixDown(1); xV>sc;PEb
} nl+8C}=u
file://fixdown rtC:3fDy
private void fixDown(int k) { -s&7zqW
int j; P\{}yd
while ((j = k << 1) <= size) { ykD-L^}
if (j < size %26amp;%26amp; queue[j] j++; ufvjW]
if (queue[k]>queue[j]) file://不用交换 s}g3*_"
break; IXC2w*'m
SortUtil.swap(queue,j,k); tNC;CP#R+
k = j; BNq6dz$J
} Xz\X 8I
} Wp(Rw4j
private void fixUp(int k) { $ 9 k5a
while (k > 1) { ]/{iIS_
int j = k >> 1; sOhKMz
if (queue[j]>queue[k]) ;YYnIb(
break; NuR3]Ja\0
SortUtil.swap(queue,j,k); y,Z2`Zmu
k = j; FE3uNfQs|
} 9=.7[-6i9
} sGO+O$J
?yKG\tPhM
} C=8IQl[^e
>/G[Oo
} k|3hs('y|
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SortUtil： to(lE2`.da
}#phNn6
package org.rut.util.algorithm; hQwUwfoe@
6 jU?~
import org.rut.util.algorithm.support.BubbleSort; <$Djags,F
import org.rut.util.algorithm.support.HeapSort; l._g[qa
import org.rut.util.algorithm.support.ImprovedMergeSort; 5,9cD`WR^
import org.rut.util.algorithm.support.ImprovedQuickSort; (&Mv!6]
import org.rut.util.algorithm.support.InsertSort; %|B$y;q^3
import org.rut.util.algorithm.support.MergeSort; 6f)7*j~
import org.rut.util.algorithm.support.QuickSort; A@jBn6
import org.rut.util.algorithm.support.SelectionSort; SXx4^X
import org.rut.util.algorithm.support.ShellSort; H^<?h6T
ufo\p=pGG
/** \|6Q]3l
* @author treeroot ]T._TZ"
* @since 2006-2-2 TecWv@.
* @version 1.0 i4lB]k
*/ <jqL4!<
public class SortUtil { OmZK~$K_
public final static int INSERT = 1; MUUhg
public final static int BUBBLE = 2; u3\_![Jt?
public final static int SELECTION = 3; {v*X}`.h
public final static int SHELL = 4; FTu<$`!1L
public final static int QUICK = 5; B$MHn?
public final static int IMPROVED_QUICK = 6; m@"p#pt(_
public final static int MERGE = 7; zvwv7JtB
public final static int IMPROVED_MERGE = 8; ,qj M1xkL$
public final static int HEAP = 9; 2XyC;RWJ%
oxLO[js
public static void sort(int[] data) { vdd>\r)v
sort(data, IMPROVED_QUICK); Rp !Rzl<
} ;iz3Bf1o
private static String[] name={ 7%W@Hr,%F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RmQ>.?
}; )h1 `?q:5
4%7Oaf>9
private static Sort[] impl=new Sort[]{ c 6/lfgN
new InsertSort(), S2?)Sb`
new BubbleSort(), O@>{%u
new SelectionSort(), Hk?E0.
new ShellSort(), {6iHUK
new QuickSort(), rd^j<
new ImprovedQuickSort(), uzL|yxt
new MergeSort(), i}@5<&J
new ImprovedMergeSort(), 1-PFM-
new HeapSort() a>S-50
}; sI@kS^
j6Au<P
public static String toString(int algorithm){ 'grb@+w(
return name[algorithm-1]; zwK$ q=-:
} vqo ~?9z[e
ZK8DziO
public static void sort(int[] data, int algorithm) { 0gr#<(
impl[algorithm-1].sort(data); be'&tsZ9
} i8.OM*[f
Mm%b8#Fe!
public static interface Sort { wV'_{/WM
public void sort(int[] data); 9HAK
} X:W}S/
D1EHT}
public static void swap(int[] data, int i, int j) { xt8@l [Z
int temp = data; 3Z74&a$
data = data[j]; jyC>~}?
data[j] = temp; $'bb)@_
} dq3"L!0u
} "~T06!F45