[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; fQ"Vx!
} =jh^mD&'
int i1=l; Mv/ SU">F
int i2=mid+1; sr[[xzL
for(int cur=l;cur<=r;cur++){ <+r~?X_
if(i1==mid+1) W`u @{Vb]
data[cur]=temp[i2++]; !5h-$;
else if(i2>r) 'AWWdz
data[cur]=temp[i1++]; i;/;zG^=_
else if(temp[i1] data[cur]=temp[i1++]; Nxl#]
else g~,iWoY
data[cur]=temp[i2++]; Y@q9
} oiR9NB&<
} (pM&eow}
^fsC]9NS
} op2Zf?Bx{+
-DJ,<f*$
改进后的归并排序: z79oj\&[
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package org.rut.util.algorithm.support; OAFxf,b
ltU{P|7!E
import org.rut.util.algorithm.SortUtil; P.Cn[64a+@
6Y6t.j0vN.
/** Y1>OhHuN
* @author treeroot RTbV!I
* @since 2006-2-2 _*g.U=u
* @version 1.0 Z8/.I
*/ ^V9|uHOJoq
public class ImprovedMergeSort implements SortUtil.Sort { AB0}6g^O
~.J*_0~Ze
private static final int THRESHOLD = 10; -R1;(n)
gaNe\
/* _,v?rFLE
* (non-Javadoc) B 5qy4MFWs
* e2G;_:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pRxVsOb
*/ FIAmAZH}_
public void sort(int[] data) { %jf|efxo
int[] temp=new int[data.length]; pbqk
mergeSort(data,temp,0,data.length-1); T*Ge67
} = =Q*|L-g
?IS[2 v$
private void mergeSort(int[] data, int[] temp, int l, int r) { +_vf=d
int i, j, k; =zrfh-lwH
int mid = (l + r) / 2; @c"s6h&
if (l == r) c;(Fz^&_
return; 5kWzD'!^
if ((mid - l) >= THRESHOLD) vA ZkT"
mergeSort(data, temp, l, mid); @].!}tz
else @p/"]zf
insertSort(data, l, mid - l + 1); k#~oagW_Gw
if ((r - mid) > THRESHOLD) AY"wEyNU
mergeSort(data, temp, mid + 1, r); sK9RViqF\
else FqGMHM\J
insertSort(data, mid + 1, r - mid); )MTf
yP} |8x
for (i = l; i <= mid; i++) { _ MB/p
temp = data; Y`$\o
} 50A\Y)i_mZ
for (j = 1; j <= r - mid; j++) { 0wSy[z4V
temp[r - j + 1] = data[j + mid]; f-H"|9
} b KIL@AI
int a = temp[l]; %qE"A6j
int b = temp[r]; FL^t}vA
for (i = l, j = r, k = l; k <= r; k++) { &;r'JIp
if (a < b) { ^ T`T?*h
data[k] = temp[i++]; *qLk'<
a = temp; mea} 9]c
} else { ,afO\oe>MG
data[k] = temp[j--]; @ZJ}lED3
b = temp[j]; |=~mRqG
} lfd-!(tXD
} JV4fL~
} #h9Gl@|
t;PG
/** U7g,@/Qx
* @param data &w`Ho)P
* @param l (Uu5$q(
* @param i eTw9c }[
*/ ieWXr4@:
private void insertSort(int[] data, int start, int len) { =oiz@Q@H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S1~K.<B
} cH:&S=>h
} iPG:w+G
} 'L9hM.+
} +eKLwM
+R;LHRS%
堆排序： *:un+k
*<[\|L:#]Z
package org.rut.util.algorithm.support; UmMu|`
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import org.rut.util.algorithm.SortUtil; pStbj`Eq
?|}qT05
/** d( ru5*p
* @author treeroot ;l0%yg/}
* @since 2006-2-2 :f_oN3F p
* @version 1.0 0yMHU[):~
*/ %z-so?gF
public class HeapSort implements SortUtil.Sort{ -byaV;T?"
hgDFhbHtd6
/* (non-Javadoc) >o&%via}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?8< =.,r
*/ I0x;rP
public void sort(int[] data) { ]:T:cO0_n
MaxHeap h=new MaxHeap(); y@2"[fo3~
h.init(data); KyP@ hhj
for(int i=0;i h.remove(); ''!j:49
System.arraycopy(h.queue,1,data,0,data.length); q@VIFmqY!
} nox-)e
saQo]6#
private static class MaxHeap{ vgg)f~
,+C?UW
void init(int[] data){ w}(pc}^U
this.queue=new int[data.length+1]; =,qY\@fq
for(int i=0;i queue[++size]=data; iYw1{U
fixUp(size); O*]}0*CT
} 0(Z:QqpU$
} e.XD5~Ax
H.]<fvP
private int size=0; I3sfOU
+u5xK
private int[] queue; 4k<U5J
#SI]^T|
public int get() { E&Lml?@
return queue[1]; HB*BL+S06
} DR]oK_
d$E>bo-\
public void remove() { 0a@tPskV
SortUtil.swap(queue,1,size--); Ky8,HdAq
fixDown(1); $/(``8li_
} [(TmAEON
file://fixdown I4UsDs*BD
private void fixDown(int k) { nG?Z* n
int j; ? IlT[yMw
while ((j = k << 1) <= size) { h. 4#C}> )
if (j < size %26amp;%26amp; queue[j] j++; |DVFi2
if (queue[k]>queue[j]) file://不用交换 Ic&YiATj
break; IeA/<'Us
SortUtil.swap(queue,j,k); LL+_zBP.
k = j; J_|%8N{[x
} };Df ><
} Y-+Kf5_[
private void fixUp(int k) { \S?-[v*{
while (k > 1) { fT?m~W^
int j = k >> 1; 8-kR {9r
if (queue[j]>queue[k]) BV/ ^S.~
break; asy:[r"
SortUtil.swap(queue,j,k); zA$ f$J7\^
k = j; ]y$/~(OW
} GN5*
} %=s2>vv9
[x`),3qD
} /%t`0pi
Wap\J7NY
} ]ERAt^$0
V@gG x
SortUtil： =0;njL(7;
zc,X5R1
package org.rut.util.algorithm; <RH%FhT
~qTChCXP
import org.rut.util.algorithm.support.BubbleSort; ka(3ONbG
import org.rut.util.algorithm.support.HeapSort; ={6vShG)m
import org.rut.util.algorithm.support.ImprovedMergeSort; qkC{IBN92
import org.rut.util.algorithm.support.ImprovedQuickSort; QMX
import org.rut.util.algorithm.support.InsertSort; #BH]`A J
import org.rut.util.algorithm.support.MergeSort; X_rv}
import org.rut.util.algorithm.support.QuickSort; eE\T,u5:
import org.rut.util.algorithm.support.SelectionSort; g@?R"
import org.rut.util.algorithm.support.ShellSort; Gtvbm
YETGq-
/** ).Iifu|ks
* @author treeroot %Br1b6 V
* @since 2006-2-2 {`>pigo
* @version 1.0 /%{CJ0Y
*/ SF ^$p$mC
public class SortUtil { @.G;dL.f{
public final static int INSERT = 1; [3tU0BU"
public final static int BUBBLE = 2; (5hUoDr!
public final static int SELECTION = 3; q"f7$
public final static int SHELL = 4; $t5>1G1j7
public final static int QUICK = 5; c7tO'`q$e
public final static int IMPROVED_QUICK = 6; Y10
public final static int MERGE = 7; 6vU%Y_n=y]
public final static int IMPROVED_MERGE = 8; ;{e'q?Y
public final static int HEAP = 9; tm_\(
91fZr
public static void sort(int[] data) { F<*zL:-Z
sort(data, IMPROVED_QUICK); N];K
} p"*xyex
private static String[] name={ 8`I,KkWg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *W 04$N
}; lm+s5}*%o
)! kl:
private static Sort[] impl=new Sort[]{ Qdc)S>gp
new InsertSort(), 6]HMhv
new BubbleSort(), 4T){z^"
new SelectionSort(), AmCymT3P*e
new ShellSort(), NKVLd_f k
new QuickSort(), X@A8~kj1
new ImprovedQuickSort(), 0juP"v$C>
new MergeSort(), QV#HN"F/K
new ImprovedMergeSort(), uFvR(LDb&g
new HeapSort() .i#'IS0c
}; AJ#YjkO>]
e_S,N0
public static String toString(int algorithm){ (8NE'd8
return name[algorithm-1]; <Y;w I#C
} kD((1v*D$
7Fzr\&
public static void sort(int[] data, int algorithm) { 6J-=6t|
impl[algorithm-1].sort(data); \t=#MzjR
} .^ba*qb`{
>Wd_?NaI
public static interface Sort { ^7*zi_Q
public void sort(int[] data); W}Rzn
} UMPW<>z
x4?g>v*J
public static void swap(int[] data, int i, int j) { .`&k`
int temp = data; C_h$$G{S(
data = data[j]; 6y{CM/DC
data[j] = temp; TeJ=QpGW2
} JM*!(\Y
} /f=31<+MtF