[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; MKGS`X]<J
} `hh9"Ws%
int i1=l; I\P Bu$Ww
int i2=mid+1; 2F_ R/{D
for(int cur=l;cur<=r;cur++){ HP2wtN{Zs
if(i1==mid+1) rp! LP#*
data[cur]=temp[i2++]; b=##A
else if(i2>r) mxTk+j=
data[cur]=temp[i1++]; Ry;$^.7%
else if(temp[i1] data[cur]=temp[i1++]; >X}{BDMb.
else u/^|XOy
data[cur]=temp[i2++]; )-P!Ae_.v
} #5CI)4x0!
} dZ2%S''\
7 &)]) {Q
} >O{7/)gS^
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改进后的归并排序: I %_MV
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package org.rut.util.algorithm.support; AMlV%U#
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import org.rut.util.algorithm.SortUtil; </oY4$l'
_uH9XGm
/** G"s0GpvQ
* @author treeroot 7|YrdK<
* @since 2006-2-2 /"AvOh*
* @version 1.0 K!{5[G
*/ WnxEu3U
public class ImprovedMergeSort implements SortUtil.Sort { `"y`AY/N
CDg AGy
private static final int THRESHOLD = 10; 60B-ay0e$b
nnCug
/* 6XUuGxQV/
* (non-Javadoc) V% axeqs
* 4KpL>'Q=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cf8-]G?tK
*/ h* .w"JO
public void sort(int[] data) { y%(X+E"n*
int[] temp=new int[data.length]; Ub)I66
mergeSort(data,temp,0,data.length-1); )qM|3],
} [,f)9v)
;b~~s.+
private void mergeSort(int[] data, int[] temp, int l, int r) { -zfoRU v
int i, j, k; D&{ *AH%Q
int mid = (l + r) / 2; b](o]O{v
if (l == r) [B/0-(?
return; # mT]j""
if ((mid - l) >= THRESHOLD) jz:gr=*z
mergeSort(data, temp, l, mid); aiftlY
else WYIw5jzC
insertSort(data, l, mid - l + 1); ,+L KJl
if ((r - mid) > THRESHOLD) IsYP0(L
mergeSort(data, temp, mid + 1, r); g'lT
else 8OAg~mQ15(
insertSort(data, mid + 1, r - mid); H~9=&p[Q
vZjZb(jlN
for (i = l; i <= mid; i++) { : }?{@#Z
temp = data; ZlR!s!vv
} "~$$
for (j = 1; j <= r - mid; j++) { 1kFjas`g
temp[r - j + 1] = data[j + mid]; [8]m8=n
} X , ZeD
int a = temp[l]; "EPD2,%S
int b = temp[r]; HhSjR%6HY;
for (i = l, j = r, k = l; k <= r; k++) { }p'8w\C$
if (a < b) { =7jEz+w#
data[k] = temp[i++]; l1-HO
a = temp; qi=3L
} else { [&VxaJ("3
data[k] = temp[j--]; lizTRVBE
b = temp[j]; !WKk=ysFS
} (K #A
} f!g<3X{=
} Yo2Trh
)!-S|s'
/** ~775soN
* @param data J?jeYW
* @param l :R+],m il
* @param i \C/z%Hf7-
*/ h([0,:\
private void insertSort(int[] data, int start, int len) { ]h@{6N'oNS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KOSyh<&
} 0|C[-ppr
} 7%CIt?Z%
} -CU,z|g+
} lgT?{,>RkW
Z{}+)Q*Q
堆排序： dF,DiRD
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package org.rut.util.algorithm.support; XiG88Kwv
<xF?~7
import org.rut.util.algorithm.SortUtil; `pYE[y+
N(R,8GF5G
/** 3 jh|y,
* @author treeroot ,OB&nN t>
* @since 2006-2-2 Nmf#`+7gCI
* @version 1.0 <nA3Sd"QfV
*/ AQ}l%
public class HeapSort implements SortUtil.Sort{ 3wNN<R
\Da~p9T&
/* (non-Javadoc) SJ(9rhB5*.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yq;&F0paK
*/ MVAc8dS
public void sort(int[] data) { ,k%8yK
MaxHeap h=new MaxHeap(); nHU3%%%cU
h.init(data); z(UX't (q
for(int i=0;i h.remove(); P1QB`&8F
System.arraycopy(h.queue,1,data,0,data.length); eCL?mhK
} 2{};6{yz
ayH>XwY6
private static class MaxHeap{ -s~p}CQ.
'%Dg{ zL
void init(int[] data){ ZOHRUm
this.queue=new int[data.length+1]; p;ZDpR
for(int i=0;i queue[++size]=data; )`RZkCe
fixUp(size); fiqj;GW
} ^z?=?%{
} R7t bxC
zf")|9j
private int size=0; -AeHY'T
1 '%-y
private int[] queue; _^3@PM>
2^ kn5
public int get() { s.ey!ew
return queue[1]; ^ N_`^m
} ZArf;&8
n(# c`t*
public void remove() { @f'AWeJ2
SortUtil.swap(queue,1,size--); ;@O(z*14@
fixDown(1); %w%zv2d
} ,,2_/u\"/i
file://fixdown ~pwY6Q
private void fixDown(int k) { pb=HVjW<
int j; 6KBHRt
while ((j = k << 1) <= size) { .=aMjrME
if (j < size %26amp;%26amp; queue[j] j++; 3?6Ber y=
if (queue[k]>queue[j]) file://不用交换 CCwK8`%
break; <sF!]R&4
SortUtil.swap(queue,j,k); lZ+/\s,]|
k = j; _4S7wOq5
} 3~8AcX@
} ri;r7Y9V9`
private void fixUp(int k) { '4Y*-!9
while (k > 1) { |W/Hi^YE2
int j = k >> 1; n7'<3t
if (queue[j]>queue[k]) |O^V)bZmx
break; pe|\'<>i
SortUtil.swap(queue,j,k); akY6D]M
k = j; -hm9sNox
} t"FRLC
} }8X:?S %
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} /XC;.dLA#
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} Pyit87h{
r]Z.`}Kkm
SortUtil： T&e%/
DwQp$l'NfW
package org.rut.util.algorithm; HJ(=?TU
|O'Hh7
import org.rut.util.algorithm.support.BubbleSort; ec,z6v^9
import org.rut.util.algorithm.support.HeapSort; yA457'R1
import org.rut.util.algorithm.support.ImprovedMergeSort; )z|_*||WU^
import org.rut.util.algorithm.support.ImprovedQuickSort; Oym]&SrbS
import org.rut.util.algorithm.support.InsertSort; >4Fdxa
import org.rut.util.algorithm.support.MergeSort; !WDn7j'A
import org.rut.util.algorithm.support.QuickSort; 7E@$}&E
import org.rut.util.algorithm.support.SelectionSort; W'8J<VBD
import org.rut.util.algorithm.support.ShellSort; ;%lJD"yF
<:H
/** _p?I{1O
* @author treeroot 6YB-}>?
* @since 2006-2-2 ~6=Wq64
* @version 1.0 E%KC'TN^D
*/ 30:HRF(:
public class SortUtil { .kz(V5
public final static int INSERT = 1; 4j2~"K
public final static int BUBBLE = 2; <;.}WQC
public final static int SELECTION = 3; @faF`8LwA
public final static int SHELL = 4; r< N-A?a
public final static int QUICK = 5; w?*'vF_2:#
public final static int IMPROVED_QUICK = 6; IhtmD@H}
public final static int MERGE = 7; pU[a[
public final static int IMPROVED_MERGE = 8; )[F46?$vrk
public final static int HEAP = 9; C8O7i[uc
yAZ.L/jyr
public static void sort(int[] data) { e\+~
sort(data, IMPROVED_QUICK); y'i:%n}I
} 98<bF{#0WM
private static String[] name={ QqT6P`0u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4OB~h]Vc
}; kM}ic(K
R oF
private static Sort[] impl=new Sort[]{ [7ek;d;'t
new InsertSort(), hA&j?{
new BubbleSort(), uH~ TugQ~
new SelectionSort(), (PE8H~d
new ShellSort(), -hJ>wGI
new QuickSort(), JXD?a.vy^q
new ImprovedQuickSort(), %^)JaEUC
new MergeSort(), NC[GtAPD3
new ImprovedMergeSort(), 4N0W& Dy
new HeapSort() K[3D{=
}; o 0cc+
MSrY*)n!>O
public static String toString(int algorithm){ ^~*[~
return name[algorithm-1]; $ M[}(m
} 6vp8LNSW
WPh |~]by<
public static void sort(int[] data, int algorithm) { k(vEp]
impl[algorithm-1].sort(data); aZ`_W|
} AcfkY m~
y9l.i@-
public static interface Sort { }i/2XmA )
public void sort(int[] data); fuIv,lDA
} Gh>fp
Y|qixpP
public static void swap(int[] data, int i, int j) { p'w"V6k('~
int temp = data; Ubos#hP
data = data[j]; B$[%pm`'2
data[j] = temp; P.H/H04+
} 35]G_\
} Ns(L1'9=