[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; Jsee8^_~
} ^c1%$@H
int i1=l; \Uun2.K
int i2=mid+1; gkdd#Nrk
for(int cur=l;cur<=r;cur++){ 4qtjP8Zv[
if(i1==mid+1) rs$sAa*f
data[cur]=temp[i2++]; K252l,;|
else if(i2>r) $42C4I*E
data[cur]=temp[i1++]; ;eznONNF
else if(temp[i1] data[cur]=temp[i1++]; Dp 0
else %;UEyj
data[cur]=temp[i2++]; 2.=3:q!H<%
} rA9BY :N@
} eWvL(2`Tx
bXoj/zek
} 30 VvZb
k~#F@_
改进后的归并排序: -(FVTWi0
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package org.rut.util.algorithm.support; bd[zdL#4K
k,>sBk8
import org.rut.util.algorithm.SortUtil; @q9uU9c
.YquOCc(
/** \>NjeMuWU
* @author treeroot j%R}
* @since 2006-2-2 OM!CP'u#{
* @version 1.0 L^:+8g
*/ 8fzmCRFH
public class ImprovedMergeSort implements SortUtil.Sort { /esSM~*H
>#z*gCO5,
private static final int THRESHOLD = 10; 0Y#S2ty
#87:Or1
/* 7bioLE
* (non-Javadoc) Ug=8:a(U.
* /[YH W]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M9{?gM9
*/ b?-Ep?G'\
public void sort(int[] data) { EB'(%dH
int[] temp=new int[data.length]; tp2CMJc{L
mergeSort(data,temp,0,data.length-1); ;\=W=wL(
} 8M m,a
Ilvz@=
private void mergeSort(int[] data, int[] temp, int l, int r) { oXG,8NOdC
int i, j, k; N%{&%C6{
int mid = (l + r) / 2; ;+XiDEX0}
if (l == r) JF]HkH_u
return; L*tn>AO
if ((mid - l) >= THRESHOLD) mBgMu@zt)
mergeSort(data, temp, l, mid); X$w ,zb\
else -:(,<Jt<
insertSort(data, l, mid - l + 1); PdG:aGQ>
if ((r - mid) > THRESHOLD) `INcZr"
mergeSort(data, temp, mid + 1, r); |V{'W-` |[
else 2ul!f7#E
insertSort(data, mid + 1, r - mid); \;x+KD
:70cOt~Z
for (i = l; i <= mid; i++) { -fu=RR
temp = data; SesJg~8
} n0#HPI"
for (j = 1; j <= r - mid; j++) { ;wCp j9hir
temp[r - j + 1] = data[j + mid]; ?#^(QR|/
} :`6E{yfM
int a = temp[l]; O.S(H1z<G
int b = temp[r]; `i0RLGze
for (i = l, j = r, k = l; k <= r; k++) { '7}s25[{\
if (a < b) { z8+3/jLN0B
data[k] = temp[i++]; Z+ [Nco
a = temp; (NUwkAOM}
} else { EeWCy5W
data[k] = temp[j--]; u= ( kii=/
b = temp[j]; RWf4Wh?d
} ('!90
} #LEK?]y
} +hg|!SS@5
zRsG$)B
/** A<.`HCv2
* @param data 0hK)/!Y
* @param l s<x2*yVUA
* @param i ?}y?e}y*xZ
*/ uNV(r"
private void insertSort(int[] data, int start, int len) { pulE6T7x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CZg$I&x
} 6JBE=9d-Q
} I0oM\~#
} Ro`Hm8o/
} t5n$sF
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堆排序： +avu&2B
rwr>43S5<3
package org.rut.util.algorithm.support; _O~DJ"
'VCF{0{H~
import org.rut.util.algorithm.SortUtil; dC;@ Fn
-xtj:UO
/** w$UWfL(
* @author treeroot ,dK<2XP
* @since 2006-2-2 RajzH2j+>
* @version 1.0 1Iu^+
*/ Fn4i[|W42
public class HeapSort implements SortUtil.Sort{ G^J|_!.a
gS~QlW V
/* (non-Javadoc) [#V?]P\uV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [9NzvC 9I
*/ C0;c'4(
public void sort(int[] data) { SN O'*?
MaxHeap h=new MaxHeap(); *KSQ^.sYh
h.init(data); ^'r/;(ZF*/
for(int i=0;i h.remove(); n\&[^Q#b|
System.arraycopy(h.queue,1,data,0,data.length); CGvU{n,"
} he;;p="!*
1I^[_ /_\y
private static class MaxHeap{ S!cc%
UbT7
void init(int[] data){ KOVGwEj
this.queue=new int[data.length+1]; 2:^Dv1J)rD
for(int i=0;i queue[++size]=data; n%? bMDS
fixUp(size); HkFoyy
} !Z2?dhS
} :Zl@4}
`qp[x%7^
private int size=0; S1NM9xHJ
!T02@e/
private int[] queue; 4vcUHa|4
9/TF#
public int get() { ;muxIr`?
return queue[1]; , }O>,AU
} EQXvEJ^
l[mXbQd
public void remove() { V~` ?J6
SortUtil.swap(queue,1,size--); XfmPq'#Z
fixDown(1); }-9
} smW 7zGE
file://fixdown V9f$zjpw
private void fixDown(int k) { _v:t$k#sN
int j; |T0jq
while ((j = k << 1) <= size) { ZAVjq;bq
if (j < size %26amp;%26amp; queue[j] j++; iE>E*!aBg
if (queue[k]>queue[j]) file://不用交换 EE5I~k5
break; {Sm^F
SortUtil.swap(queue,j,k); ^6`"f
k = j; f}b= FV{
} 21x?TZa
} -Zd0[& ']
private void fixUp(int k) { E'zLgU)r`
while (k > 1) { {(#Dou
int j = k >> 1; H'Q4IRT
if (queue[j]>queue[k]) 5%j !SVW
break; `)$'1,]u
SortUtil.swap(queue,j,k); h-<2N)>!
k = j; :786Z,')
} -t2bHhG
} ?]SSmZpk
&u0JzK
} HTuv_kE
F1%-IBe
} Q[J%
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SortUtil： uuW._$.A>
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package org.rut.util.algorithm; c.y8x
]wCg'EUB
import org.rut.util.algorithm.support.BubbleSort; f]N2(eM
import org.rut.util.algorithm.support.HeapSort; kKwb)i
import org.rut.util.algorithm.support.ImprovedMergeSort; /iFtW#K+
import org.rut.util.algorithm.support.ImprovedQuickSort; uc4#giCD
import org.rut.util.algorithm.support.InsertSort; VuZd
import org.rut.util.algorithm.support.MergeSort; (;-< @~2
import org.rut.util.algorithm.support.QuickSort; 2.6%?E]
import org.rut.util.algorithm.support.SelectionSort; dq[X:3i
import org.rut.util.algorithm.support.ShellSort; }DiMt4!ZC!
9BgR@b
/** 5>M6lwS
* @author treeroot v?Q&06PMRc
* @since 2006-2-2 -:]_DbF
* @version 1.0 ~LqjWU
*/ v8Gm;~
public class SortUtil { BMMWP
public final static int INSERT = 1; ?v?b%hK!;
public final static int BUBBLE = 2; ~_R8; b
public final static int SELECTION = 3; 0w[#`
public final static int SHELL = 4; 60?/Z2w5
public final static int QUICK = 5; 2;N)>[3*J
public final static int IMPROVED_QUICK = 6; *CG-F=
public final static int MERGE = 7; W,'30:#Fr7
public final static int IMPROVED_MERGE = 8; J+tpBPmb
public final static int HEAP = 9; dV(61C0wn
T@0\z1,~S
public static void sort(int[] data) { cC@B\Q
sort(data, IMPROVED_QUICK); k4Ed7T-
} <RQ\nU
private static String[] name={ `{BY {
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" = rDoXm
}; co^kP##Y
*0M[lR0t
private static Sort[] impl=new Sort[]{ jinDKJ,n;
new InsertSort(), 2)oT\m
new BubbleSort(), NJ\ID=3l
new SelectionSort(), n@IpO i$Q
new ShellSort(), ^)|8N44O
new QuickSort(), `rEu8u
new ImprovedQuickSort(), c!n\?lB
new MergeSort(), T 2Uu/^
new ImprovedMergeSort(), 8bT]NvCA
new HeapSort() Hxe!68{aR
}; \D Oqx
=y)e&bj
public static String toString(int algorithm){ ? I7}4i7
return name[algorithm-1]; .URCuB\{
} -'ff0l
G 92\` Q
public static void sort(int[] data, int algorithm) { Pyfj[m4+}
impl[algorithm-1].sort(data); Se*o{V3s$
} N,N9K
BWRM gN'.
public static interface Sort { 4H@:|
public void sort(int[] data); #w_cos[I
} h$3o]~t
1yHlBeEC
public static void swap(int[] data, int i, int j) { {*!L[)
int temp = data; V}c3}'_U]
data = data[j]; d~#>.$Uu
data[j] = temp; $J]VY;C!
} ,ru2C_LQ
} k0[b4cr`