[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; V>{< pS
} t[^$F,
int i1=l; ~3&{`9Y
int i2=mid+1; *3GV9'-P
for(int cur=l;cur<=r;cur++){ ~4~`bT9
if(i1==mid+1) yYG<tUG;
data[cur]=temp[i2++]; Jup)m/
else if(i2>r) .Mt3ec<
data[cur]=temp[i1++]; TktH28tK
else if(temp[i1] data[cur]=temp[i1++]; R@vcS=m7
else E[H
data[cur]=temp[i2++]; FKa";f"
} X\|!
} {Cx5m
,^(]zZh
} @AsJnf$y
+a1x;
改进后的归并排序: 0I&k_7_
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package org.rut.util.algorithm.support; ks'>?Dw
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import org.rut.util.algorithm.SortUtil; * QgKo$IF
P15 H[<:Fz
/** CD|[PkjW
* @author treeroot "LMj,qZ1!
* @since 2006-2-2 T<AT&4
* @version 1.0 4fEDg{T
*/ !IxO''4
public class ImprovedMergeSort implements SortUtil.Sort { S{@}ECla
zkQ[<
private static final int THRESHOLD = 10; +X}i%F'
{z#2gc'Q
/* #/)t]&n
* (non-Javadoc) "}4%vZz
* 1yy?1&88S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i|YS>Pw~j
*/ wQkM:=t5
public void sort(int[] data) { +.G"ool
int[] temp=new int[data.length]; s{hKl0ds
mergeSort(data,temp,0,data.length-1); jlEz]@ i
} ()3\(d5e
7s9h:/Lu
private void mergeSort(int[] data, int[] temp, int l, int r) { wj|Zn+{"nF
int i, j, k; Vz{+3vfra6
int mid = (l + r) / 2; ]Bw0Qq F#
if (l == r) sDY~jP[Oa
return; :6^7l/p
if ((mid - l) >= THRESHOLD) ?$r`T]>`2
mergeSort(data, temp, l, mid); 0XHQ5+"8
else PNU(;&2<
insertSort(data, l, mid - l + 1); E-e(K8R
if ((r - mid) > THRESHOLD) XYE|=Tr]
mergeSort(data, temp, mid + 1, r); x0*{oP
else j0jl$^
insertSort(data, mid + 1, r - mid); q'2vE;z Kb
EE/mxN(<
for (i = l; i <= mid; i++) { 3a/n/_D
temp = data; Y.tx$%
} 4w4B\Na>l
for (j = 1; j <= r - mid; j++) { l'@-?p(Vuw
temp[r - j + 1] = data[j + mid]; VJh8`PVX
} SC{m@
int a = temp[l]; 1J@Iekat
int b = temp[r]; vqf$("
for (i = l, j = r, k = l; k <= r; k++) { tYS4"Nfb+
if (a < b) { U, 6iT
data[k] = temp[i++]; +n3I\7G>
a = temp; 2_o#Gx'
} else { nQ%HtXt;
data[k] = temp[j--]; vW63j't_
b = temp[j]; " \$^j#o
} }[*'
} yU$MB,1
} vdQoJWuB
S}m_XR]
/** OMGggg
* @param data G=dzP}B'WA
* @param l $Y$9]G":
* @param i #el27"QP0
*/ iyskADS
private void insertSort(int[] data, int start, int len) { 3>,}N9P-v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); md!6@)S-p
} 1GY2aZ@
} [U\?+@E*
} a"8[,A3
} s6H'}[E<
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堆排序： ZedFhm
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package org.rut.util.algorithm.support; ~j0rORy]
'J|2c;M\x
import org.rut.util.algorithm.SortUtil; B.z$0=b
8v:{BHX
/** ?RRO
* @author treeroot 8~=*\ @^
* @since 2006-2-2 g(7-3q8eq
* @version 1.0 "4j~2{{F
*/ @@EI=\
public class HeapSort implements SortUtil.Sort{ gcLz}84
4s\spvJ
/* (non-Javadoc) {(73*-~$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }5o?7}?
*/ FLZ9pb[T
public void sort(int[] data) { ]rcF/uQJ<n
MaxHeap h=new MaxHeap(); '\Xkvi
h.init(data); EM,C
for(int i=0;i h.remove(); MB plhVK8
System.arraycopy(h.queue,1,data,0,data.length); Tt;F-
} 7#8Gn=g
=x~I'|%3
private static class MaxHeap{ b@:OlZ~%
c]=2>ov)hR
void init(int[] data){ ^aFm6HS1
this.queue=new int[data.length+1]; 9I/b$$?D
for(int i=0;i queue[++size]=data; MNT~[Z9L5G
fixUp(size); S0$^|/Sr
} N2r zHK
} AerU`^
Ebg8qDE
private int size=0; ZWs
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private int[] queue; |dRVSVN
I[z:;4W}L^
public int get() { Et>#&Nw8
return queue[1]; qTO6I5u
} Z\0Rw>#
3;nOm =I
public void remove() { @sXFu[!U
SortUtil.swap(queue,1,size--); _1" ecaA
fixDown(1); 9hp&HL)BOa
} yTm \OUD
file://fixdown *MF9_V)8V
private void fixDown(int k) { gGqrFh\
int j; p|UL<M9{a]
while ((j = k << 1) <= size) { Aoa8Q E
if (j < size %26amp;%26amp; queue[j] j++; H`EhsYYK
if (queue[k]>queue[j]) file://不用交换 gY}In+S
break; Hxu5Dx5![
SortUtil.swap(queue,j,k); :Mx
k = j; _0/unJl`
} Dc9uq5l
} %&ejO=r
private void fixUp(int k) { cx}Yu8
while (k > 1) { J8|MK.oD
int j = k >> 1; Daf|.5>(@
if (queue[j]>queue[k]) j50vPV8m
break; MJn-] E
SortUtil.swap(queue,j,k); _k84#E0
k = j; K`*GZ+b|`
} r924!zdbR
} %L|fTndKH
HR>Y?B{
} p8Vqy-:
fHt\KP
} 'K[ml ?_
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SortUtil： V^~RDOSy7n
}\4yU=JPK
package org.rut.util.algorithm; 24sMX7Q,i
5Rqdo\vE
import org.rut.util.algorithm.support.BubbleSort; /Vlc8G
import org.rut.util.algorithm.support.HeapSort; "k zKQ~
import org.rut.util.algorithm.support.ImprovedMergeSort; *D5 xbkH=.
import org.rut.util.algorithm.support.ImprovedQuickSort; blc?[ [,!
import org.rut.util.algorithm.support.InsertSort; [-~pDkf:
import org.rut.util.algorithm.support.MergeSort; U?[ (
import org.rut.util.algorithm.support.QuickSort; {gMe<y
import org.rut.util.algorithm.support.SelectionSort; k %I83,+
import org.rut.util.algorithm.support.ShellSort; 8NN+Z<
]ua3I}_B6v
/** RQ+,7Ir
* @author treeroot +NlnK6T/
* @since 2006-2-2 ["Zvwes#7
* @version 1.0 G|i0n
*/ ~id6^#&>
public class SortUtil { 4,RPidv%O
public final static int INSERT = 1; E^8|xT'h6
public final static int BUBBLE = 2; xd Z$|{,
public final static int SELECTION = 3; Z)!8a$M~
public final static int SHELL = 4; i'Y8-})
public final static int QUICK = 5; =NB[jQ :(
public final static int IMPROVED_QUICK = 6; U-|]A\`)I
public final static int MERGE = 7; ly0R'4j \
public final static int IMPROVED_MERGE = 8; ;hj lRQ\
public final static int HEAP = 9; F^UtZG+
:e<jD_.X
public static void sort(int[] data) { MU<(O}
sort(data, IMPROVED_QUICK); mV0,T*}e
} Om3Ayk}
private static String[] name={ InPE_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >?g@Nt8
}; j^G=9r[,
>%/x~UFc5
private static Sort[] impl=new Sort[]{ yT^x0?U
new InsertSort(), CmEqo;Is
new BubbleSort(), 'g#%>
new SelectionSort(), )~2\4t4|g
new ShellSort(), \JLGw1F
new QuickSort(), @K;b7@4y
new ImprovedQuickSort(), `}X3f#eO&
new MergeSort(), 5F kdGF
new ImprovedMergeSort(), F5)`FM^R
new HeapSort() x&B&lFmo8
}; }#z1>y!#
KEAXDF&#
public static String toString(int algorithm){ dx%z9[8~{.
return name[algorithm-1]; 4o>y9
} Vl.,e1)6
:Cq73:1\B
public static void sort(int[] data, int algorithm) { ;i@S}LwL
impl[algorithm-1].sort(data); Yf0 KG
} }[+uHR6L
+n^M+ea;
public static interface Sort { JCWTB`EB>
public void sort(int[] data); "@ >6<(Ki
} +pd,gG?dW
X[tt'5
public static void swap(int[] data, int i, int j) { s-p)^B
int temp = data; HxI6_>n^I
data = data[j]; J4bP(=w!
data[j] = temp; A?R`~*Q5
} 0X)vr~`
} +\!.X_Ij