[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; 1y)|m63&
} uv$t>_^
int i1=l; !W3bHy:C"
int i2=mid+1; 3+` <2TP
for(int cur=l;cur<=r;cur++){ E"{2R>mU~
if(i1==mid+1) JDA:)[;
data[cur]=temp[i2++]; +_h1JE_}D
else if(i2>r) FPBO=?H.
data[cur]=temp[i1++]; fZ)M Dq
else if(temp[i1] data[cur]=temp[i1++]; 1tMs\e-
else gPrIu+|F
data[cur]=temp[i2++]; _Uxt9 X
} .tny"a&
} 5C^oqUZ
+zz\*
} o;D[F
MsL*\)*s
改进后的归并排序: W@(EEMhw
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package org.rut.util.algorithm.support; !L)~*!+Gf
qbwX*E~;
import org.rut.util.algorithm.SortUtil; (E.,kcAJ
(g8<"< N?
/** $B3<"
* @author treeroot wx,yx3c (
* @since 2006-2-2 r?l7_aBv3
* @version 1.0 &1:_+
*/ j~)GZV
public class ImprovedMergeSort implements SortUtil.Sort { \k69 S/O
N7b+GqYpF>
private static final int THRESHOLD = 10; }{(dG7G+
F/ODV=J-
/* 2zz7/]?Q
* (non-Javadoc) w>]?gN?8Fe
* \UF/_'=K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5/ee&sJR
*/ A=z+@b6
public void sort(int[] data) { %FDv6peH
int[] temp=new int[data.length]; kX2bU$1Q,i
mergeSort(data,temp,0,data.length-1); z!<X{& e
} ?C[W~m P
E W{vF|
private void mergeSort(int[] data, int[] temp, int l, int r) { d*e0/#s
int i, j, k; k\qF> =
int mid = (l + r) / 2; ka^sOC+Y
if (l == r) ^J TrytIB
return; i`Tp +e@a>
if ((mid - l) >= THRESHOLD) xxsax/h
mergeSort(data, temp, l, mid); BXCB/:0
else 4NY}=e5
insertSort(data, l, mid - l + 1); i Sm .E
if ((r - mid) > THRESHOLD) O_M2Axm
mergeSort(data, temp, mid + 1, r); nF Mc'm
else h "MiD
insertSort(data, mid + 1, r - mid); 94>EA/+Ek
?51Y&gOEZ
for (i = l; i <= mid; i++) { tTMYqgzUk
temp = data; u?J!3ZEtb
} 6dCS Gb
for (j = 1; j <= r - mid; j++) { *u i!|;
temp[r - j + 1] = data[j + mid]; /{[Y l[{"<
} C3XB'CL6
int a = temp[l]; aw\\oN*
int b = temp[r]; $y0[AB|V
for (i = l, j = r, k = l; k <= r; k++) { Em%0C@C
if (a < b) { CWTPf1?eB
data[k] = temp[i++]; %z0;77[1I
a = temp; &$1ifG
} else { "}ms|
data[k] = temp[j--]; U/W<Sa\`
b = temp[j]; fbG+.'
} *t)Y@=k3>
} GQ@`qYLZ+
} klwC.=?(j"
ji|+E`Nii
/** _VjfH2Y
* @param data Ap:mc:
* @param l <Va7XX%>
* @param i H8'q Y
*/ 9_h V1:
private void insertSort(int[] data, int start, int len) { /#lqv)s'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6D=9J%;
} 4 Wb^$i!
} K4G43P5q`
} <r@w`G
} ^Uj\s/
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堆排序： \6{w#HsP8
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package org.rut.util.algorithm.support; /:+f5\"-b
nQtp4
import org.rut.util.algorithm.SortUtil; \Nvu[P
8p;|&7
/** )wt mc4'
* @author treeroot @(m+B\
* @since 2006-2-2 c*k%r2'
* @version 1.0 M2$.Yom[
*/ A"V($:>U
public class HeapSort implements SortUtil.Sort{ XK";-7TZt
~l^Q~W-+
/* (non-Javadoc) Fx3CY W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c)b/"
*/ MR?5p8S#g
public void sort(int[] data) { o#^(mGj_.
MaxHeap h=new MaxHeap(); ]UMt
h.init(data); TEzMFu+V
for(int i=0;i h.remove(); 6w"_sK?
System.arraycopy(h.queue,1,data,0,data.length); ZNKopA(=|%
} $$5E+UDOs
~OE1Sd:2
private static class MaxHeap{ >,9ah"K_x
xnR;#Yc
void init(int[] data){ j@Ta\a-,x
this.queue=new int[data.length+1]; Qvx[F:#Tk
for(int i=0;i queue[++size]=data; e2dg{n$6"
fixUp(size); ,\Q^[e!m~
} ROWI.|
} R^ln-H;
+wHrS}I#g
private int size=0; 0p31C7!
rP7[{'%r
private int[] queue; it#,5#Y:
%aB RL6
public int get() { blk4@pg
return queue[1]; YjR`}rdwo
} JG:li} N
Qf .ASC
public void remove() { dc+U#]tS
SortUtil.swap(queue,1,size--); ]_EJ "'x
fixDown(1); %`# HGji)
} (Ev=kO
file://fixdown j(>~:9I`
private void fixDown(int k) { AhCqQ.O71
int j; e*!0|#-
while ((j = k << 1) <= size) { JnY.]:
if (j < size %26amp;%26amp; queue[j] j++; DmA~Vj!a^y
if (queue[k]>queue[j]) file://不用交换 (rE.ft5$9
break; I)AbH<G{
SortUtil.swap(queue,j,k); EW~M,+?
k = j; IyPk3N
} ^Mmsja5K
} Yf?hl
private void fixUp(int k) { &*YFK/]
while (k > 1) { %jErLg
int j = k >> 1; N87)rhXSo,
if (queue[j]>queue[k]) `bJ?8~ 8*
break; UID0|+%Y
SortUtil.swap(queue,j,k); 7@NV|Idtd
k = j; "2=v:\~=
} >|1$Pv?
} /=K(5Xd
6.'j\
} 'o]kOp@q
AeR*79x
} bn#'o(Lp
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SortUtil： PY76;D*`
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package org.rut.util.algorithm; _PPn =kuMa
h3rVa6cxM
import org.rut.util.algorithm.support.BubbleSort; [e f&|Pi-
import org.rut.util.algorithm.support.HeapSort; % 4Gt^:J"
import org.rut.util.algorithm.support.ImprovedMergeSort; Q.MbzSgXL
import org.rut.util.algorithm.support.ImprovedQuickSort; 2)MX<prH
import org.rut.util.algorithm.support.InsertSort; H#/Hs#
import org.rut.util.algorithm.support.MergeSort; cw/E?0MWb
import org.rut.util.algorithm.support.QuickSort; ;Qi0j<dXd
import org.rut.util.algorithm.support.SelectionSort; {l9gYA
import org.rut.util.algorithm.support.ShellSort; H{4_,2h=m
8.zYa(<2
/** >K!$@]2F
* @author treeroot 4Ifz-t/
* @since 2006-2-2 tNG[|Bi#
* @version 1.0 odTa2$O
*/ TZ#^AV=ae
public class SortUtil { "SA*
public final static int INSERT = 1; G$[Hm\V
public final static int BUBBLE = 2; nIWY<Z"
public final static int SELECTION = 3; :X}fXgeL
public final static int SHELL = 4; V<ii
public final static int QUICK = 5; 8/<+p? 3p>
public final static int IMPROVED_QUICK = 6; sLd%m+*p
public final static int MERGE = 7; AD~_n^
public final static int IMPROVED_MERGE = 8; 6F_:,b^
public final static int HEAP = 9; ~wQ M ?h
(tCBbPW6T?
public static void sort(int[] data) { N$.=1Q$F6
sort(data, IMPROVED_QUICK); pv,z$3Q
} +45.fo
private static String[] name={ +`7!4gxwK!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a$3]`
}; `Y3\R#
QIfP%,LT
private static Sort[] impl=new Sort[]{ *z^Au7,&
new InsertSort(), D `av9I
new BubbleSort(), 6a704l%#hb
new SelectionSort(), pf&U$oR4
new ShellSort(), p2 !w86 F
new QuickSort(), QJSi|&Rx&?
new ImprovedQuickSort(), BP@V:z
new MergeSort(), 7- |N&u
new ImprovedMergeSort(), `{NbMc\ ]
new HeapSort() n}C0gt-
}; Wf~PP;
Ya}}a
public static String toString(int algorithm){ `neo.]
return name[algorithm-1]; M5P3;
} &79F Uac
N|%X/UjZ2.
public static void sort(int[] data, int algorithm) { ,/"0tP&_;
impl[algorithm-1].sort(data); *xN?5u%
} :o:Z
r::0\{{r"p
public static interface Sort { f?TS#jG4}
public void sort(int[] data); xwj{4fzpk{
} n(.L=VuXn
TAq[g|N-;
public static void swap(int[] data, int i, int j) { 4]ko
int temp = data; kG5Uc83#G
data = data[j]; EHfB9%O7y
data[j] = temp; BY':R-~(
} *J{E1])<a
} hxt;sQAo{