[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; s=H/b$v
} F|]o9&/<]
int i1=l; ATYQ6E[{MV
int i2=mid+1; AIvL#12
for(int cur=l;cur<=r;cur++){ F<PWBs%
if(i1==mid+1) )'BJ4[aq\
data[cur]=temp[i2++]; &[?u1qQ%o
else if(i2>r) 7h9fQ&y
data[cur]=temp[i1++]; v$gMLu=
else if(temp[i1] data[cur]=temp[i1++]; c8k6(#\
else &+E'1h10
data[cur]=temp[i2++]; K#9(|2J%
} AmT|%j&3
} Hj5WJ{p.
4 |:Q1
} Vu|Br
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改进后的归并排序: )8 "EI-/.
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package org.rut.util.algorithm.support; Pe+ 8~0o=R
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import org.rut.util.algorithm.SortUtil; mV:RmA
Q|j@#@O1
/** 2FZ0c/[&
* @author treeroot LyJTK1]#
* @since 2006-2-2 a@5xz)
* @version 1.0 8!o{W=m^4
*/ ,6EZb[;g^
public class ImprovedMergeSort implements SortUtil.Sort { ^*cMry
3<zTkI
private static final int THRESHOLD = 10; ?z)y%`}
e'/
/* Z30z<d,j
* (non-Javadoc) _SBp66 r
* H0D>A<Ue
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9Sx<tj_4P{
*/ a`EGx{q(
public void sort(int[] data) { :|n>H+Y
int[] temp=new int[data.length]; X%4uShM
mergeSort(data,temp,0,data.length-1); `5k6s,
} o@<6TlZM
'K;4102\
private void mergeSort(int[] data, int[] temp, int l, int r) { wZ]BY;
int i, j, k; .gM>FUH3L
int mid = (l + r) / 2; e_>rJWI}
if (l == r) o-Q]Dk1W
return; lJ2|jFY9
if ((mid - l) >= THRESHOLD) xu%! b0
mergeSort(data, temp, l, mid); zulf%aaL
else a O"nD_7
insertSort(data, l, mid - l + 1); j$|Yd=
if ((r - mid) > THRESHOLD) [5RFQ!
mergeSort(data, temp, mid + 1, r); we:5gK&
else ? !oVf>
insertSort(data, mid + 1, r - mid); /+<%,c$n
\4\\575zp'
for (i = l; i <= mid; i++) { c5B_WqjJ
temp = data; gq/ePSa
} ,IT)zCpaBP
for (j = 1; j <= r - mid; j++) { }> !"SU:d
temp[r - j + 1] = data[j + mid]; 8aZey_Hw;+
} r'9=kx
int a = temp[l]; Y6;0khp
int b = temp[r]; =XacG}_
for (i = l, j = r, k = l; k <= r; k++) { ~x0-iBF
if (a < b) { U>L=.\\|
data[k] = temp[i++]; Zeme`/aBb
a = temp; PBAz`y2
} else { YL9t3]
data[k] = temp[j--]; Lilk8|?#W
b = temp[j]; 282+1X
} +QXYU8bYZ
} uwH)/BW)[
} EMW4<na[
9p[W :)P4d
/** 7uv/@(J"$
* @param data 8JtI&aH-L
* @param l Z0F>"Z_qn
* @param i TN |{P
*/ l|ZzG4]+l
private void insertSort(int[] data, int start, int len) { 9?}rpA`P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '.h/Y/oz
} 5QL9w3L
} -aH?7HV}
} XY+aunLf
} G"U>fwFuK
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堆排序： AG$-U2ap
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package org.rut.util.algorithm.support; llZ"uTK\M
;8;~C"
import org.rut.util.algorithm.SortUtil; tRUsZl
6t7;}t]t
/** >+; b>
* @author treeroot 4M0v1`k
* @since 2006-2-2 ZB^4(F')H
* @version 1.0 :E>n)_^
*/ vY0V{u?J
public class HeapSort implements SortUtil.Sort{ LG&Q>pt.
'#4mDz~
/* (non-Javadoc) QzFv;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &Xl_sDvt
*/ z[lRb]:i[
public void sort(int[] data) { m|ERf2-
MaxHeap h=new MaxHeap(); soqNzdTB2
h.init(data); Y8`))MeD
for(int i=0;i h.remove(); ZTBFV/{
System.arraycopy(h.queue,1,data,0,data.length); Za:BJ:
} 4na4Jsq{
#o"HD6e
private static class MaxHeap{ vZ nO
L1Cn
void init(int[] data){ +{Jf]"KD
this.queue=new int[data.length+1]; tls6rto
for(int i=0;i queue[++size]=data; 0ZID @^
fixUp(size); bZOy~F|
} l>5]Wd{/
} h-_0 A]
[q>i
private int size=0; 2$i 0yPv
l LD)i J1
private int[] queue; 0p>:rU~
6B;_uIq5
public int get() { P=sK+}5`q
return queue[1]; PM@s}(
} VrGb;L'[
%`\3V {2*
public void remove() { /"%IhX-
SortUtil.swap(queue,1,size--); Lx:9@3'7'
fixDown(1); w7t"&=pF7
} A6x_!
file://fixdown R:IS4AaS
private void fixDown(int k) { |v%RjN
int j; l3pW{p
while ((j = k << 1) <= size) { 9y|&T
if (j < size %26amp;%26amp; queue[j] j++; 0[!gk]p
if (queue[k]>queue[j]) file://不用交换 lRATrp#T
break; ^SSOh#
SortUtil.swap(queue,j,k); k89gJ5B$
k = j; (+Kof
} hq8/`u YF
} zUUxxS_?
private void fixUp(int k) { _~S^#ut+
while (k > 1) { WPp\sIP
int j = k >> 1; zRJKIm
if (queue[j]>queue[k]) O->(9k<
break; 'ZZWH
SortUtil.swap(queue,j,k); ??%T
k = j; b5 C}K
} v"('_!
} q;a*gqt
yE|} r
} z.9FDQLp
)Q
} m2< *
soVZz3F
SortUtil： Hv7D+j8M
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package org.rut.util.algorithm; >RqT7n8h
y:[VRLo
import org.rut.util.algorithm.support.BubbleSort; I^\bS
import org.rut.util.algorithm.support.HeapSort; bb:|1D
import org.rut.util.algorithm.support.ImprovedMergeSort; m6Cd^'J9^
import org.rut.util.algorithm.support.ImprovedQuickSort; E~@HC5.M
import org.rut.util.algorithm.support.InsertSort; l0_E9qh-i
import org.rut.util.algorithm.support.MergeSort; [U7,\o4w
import org.rut.util.algorithm.support.QuickSort; OTHd1PSOu
import org.rut.util.algorithm.support.SelectionSort; ^xNe Eb
import org.rut.util.algorithm.support.ShellSort; A&lgiR*ObT
,N|R/Vk$+E
/** 9oxf)pjw
* @author treeroot [qD<U%Hi
* @since 2006-2-2 "T1#*"{j
* @version 1.0 H- qP>:
*/ E29gnYxu8
public class SortUtil { H[!Q
public final static int INSERT = 1; f, j(uP
public final static int BUBBLE = 2; u-M$45vct
public final static int SELECTION = 3; )E~\H+FP6
public final static int SHELL = 4; ;3?J#e6;
public final static int QUICK = 5; "JLhOTPaHf
public final static int IMPROVED_QUICK = 6; |VR5Q(d
public final static int MERGE = 7; E?h2e~ ,]
public final static int IMPROVED_MERGE = 8; GGQ(|?w
public final static int HEAP = 9; =^AZx)Kwd
+?txGHQq
public static void sort(int[] data) { C\>Mt
sort(data, IMPROVED_QUICK); 3k[<4-
} -5_xI)i
private static String[] name={ TN@JPoH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +-YuBVHL
}; T&MS_E&;
M*@aA XM
private static Sort[] impl=new Sort[]{ QDT{Xg*I
new InsertSort(), T2_#[bk*d
new BubbleSort(), c^)E:J/
new SelectionSort(), qkG;YGio
new ShellSort(), /?-p^6U
new QuickSort(), `k%#0E*H
new ImprovedQuickSort(), `iayh
new MergeSort(), wOkJ:k
new ImprovedMergeSort(), l=?y=2+
new HeapSort() =2)$|KC
}; /(pD^D
IoHkcP[H
public static String toString(int algorithm){ rxI&;F#
return name[algorithm-1]; :w_1J'D}
} (?3\.tQ}}
!E#.WX
public static void sort(int[] data, int algorithm) { B|$13dHfa
impl[algorithm-1].sort(data); aKzD63
} ~Q9)Q
A*U'SCg(G
public static interface Sort { +|)#yE$aMh
public void sort(int[] data); k:@Ls
} m+^;\DFJ,
3[i!2iL.
public static void swap(int[] data, int i, int j) { G$`4.,g
int temp = data; q]%bd[zkz
data = data[j]; Fsj&/: q
data[j] = temp; vA-p}]%
} .%b_3s".
} ^JVP2L>o*