[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; }/FM#Xh
} r{;4(3E2
int i1=l; 1#RA+d(
int i2=mid+1; YH$`r6\S
for(int cur=l;cur<=r;cur++){ \dbtdhT;Z
if(i1==mid+1) g-uFss
data[cur]=temp[i2++]; ee\zU~
else if(i2>r) *Y?]="8c#;
data[cur]=temp[i1++]; f 8U;T$)
else if(temp[i1] data[cur]=temp[i1++]; j0M;2 3@[
else YR#1[fe*_
data[cur]=temp[i2++]; 0M.[) @
} ZS;kCdL
} ZXkAw sr
7:<>#
} Ds/zl Z
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改进后的归并排序: =~*u(0sJa
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package org.rut.util.algorithm.support; 0nn#U
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import org.rut.util.algorithm.SortUtil; -OAH6U9^
zj4JWUM2
/** sNTfRPC
* @author treeroot Lj\<qF~n
* @since 2006-2-2 +fmZ&9hFNJ
* @version 1.0 '1*MiFxKq
*/ Dne&YVF9V
public class ImprovedMergeSort implements SortUtil.Sort { rbWFq|(_
!qq@F%tv
private static final int THRESHOLD = 10; 1Pc'wfj
7%WI
/* O;tn5
* (non-Javadoc) Vt>E\{@[t
* (ZJ_&8C#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) > [7vXm4
*/ 3EdPKM j&
public void sort(int[] data) { :eO0{JN4T
int[] temp=new int[data.length]; nQC[[G*x
mergeSort(data,temp,0,data.length-1); s=+G%B'
} {[dqXG$v `
N~YeAe~+
private void mergeSort(int[] data, int[] temp, int l, int r) { **[p{R]8o
int i, j, k; b*7i&q'H
int mid = (l + r) / 2; z""(M4
if (l == r) !b_IH0]U
return; _l<"Qqt
if ((mid - l) >= THRESHOLD) PVQ%y
mergeSort(data, temp, l, mid); X?a67qL
else umYdr'p!v
insertSort(data, l, mid - l + 1); S([De"y
if ((r - mid) > THRESHOLD) Po[zzj>m
mergeSort(data, temp, mid + 1, r); b87d'# .
else l0V@19Ec
insertSort(data, mid + 1, r - mid); V00zk`PH
*QJ/DC$
for (i = l; i <= mid; i++) { #/6X44 *u
temp = data; g;1 UZE;
} vF1$$7k
for (j = 1; j <= r - mid; j++) { ,$>Z= ~x*
temp[r - j + 1] = data[j + mid]; U/X ^
} s,8%;\!C
int a = temp[l]; !LA#c'
int b = temp[r]; IuL]V TY
for (i = l, j = r, k = l; k <= r; k++) { u^$ CR
if (a < b) { %8/$CR
data[k] = temp[i++]; _L ].n)b
a = temp; M~4!gKs
} else { ~f:fOrLE#
data[k] = temp[j--]; }M@pdE
b = temp[j]; L K$hV"SYb
} J/ ~]A1fP6
} }I0^nv1
} 6W o7q\"
Hqk2W*UTl
/** )sr]}S0
* @param data Qy%/+9L
* @param l I&9B^fF6
* @param i 1['A1,
*/ c1f6RCu$b
private void insertSort(int[] data, int start, int len) { '_%Jw:4k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +J}M$eQ
} 8,Z0J
} 6Xa2A6
} uBXI*51{
} b~p <
\$I )}
堆排序： LxO'$oKZV
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package org.rut.util.algorithm.support; &W%TY:Da|
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import org.rut.util.algorithm.SortUtil; !E8JpE|z#
$}829<gh7
/** g|oPRC$I'
* @author treeroot spf}{o
* @since 2006-2-2 ,o`qB81
* @version 1.0 RL%{VE
*/ OkM>
public class HeapSort implements SortUtil.Sort{ -llujB%;,e
l d@^$
/* (non-Javadoc) 5y)kQ<x"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z'~5L_.]Ai
*/ &*}S 0
public void sort(int[] data) { pfG:PrZ
MaxHeap h=new MaxHeap(); d$ /o\G
h.init(data); 0WFZx Ad"
for(int i=0;i h.remove(); [g{}0[ew
System.arraycopy(h.queue,1,data,0,data.length); VQCPgs
} x+&&[>-P
Jg:'gF]jt
private static class MaxHeap{ q&.!*rPD
xFJ>s-g*
void init(int[] data){ />?d 2?
this.queue=new int[data.length+1]; a;(:iMCi
for(int i=0;i queue[++size]=data; >3JOQ;:d8
fixUp(size); DI\^+P
} 9f "*Oj
} CfAqMH*ip
6\bbP>ql
private int size=0; qy!G&
al2v1.Y}
private int[] queue; OCd[P1Y]
SaNx;xgi
public int get() { $]vR,E
return queue[1]; {>:2Ff]O:
} cIX59y#7
:p{iBDA
public void remove() { f,$CiZ"
SortUtil.swap(queue,1,size--); `4o;Lz~
fixDown(1); &45.*l|mo
} 9H<:\-:
file://fixdown o8" [6Ys
private void fixDown(int k) { Av'H(qB\K
int j; 4DNZ y2`
while ((j = k << 1) <= size) { I|.B-$gH
if (j < size %26amp;%26amp; queue[j] j++; ,Ubnz
if (queue[k]>queue[j]) file://不用交换 $?GF]BT
break; zUh(b=,
SortUtil.swap(queue,j,k); D -jew&B
k = j; ,UP6.C14
} R'{V&H^Z
} \6N\6=t!A
private void fixUp(int k) { YpWu\oP
while (k > 1) { PU8R 0r2k\
int j = k >> 1; k";;Snk
if (queue[j]>queue[k]) aRV<y8{9
break; 1F=x~FMvY
SortUtil.swap(queue,j,k); 6};Sn/8
k = j; HdGy$m`
} }>j$Wr_h
} Bg3^BOT
@=9QV3D
} W&"FejD
f; 22viE
} ~6OdPD
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SortUtil： {\%x{
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package org.rut.util.algorithm; fF9vV. }
(YR1ML3N
import org.rut.util.algorithm.support.BubbleSort; F2u{Wzr_@
import org.rut.util.algorithm.support.HeapSort; bZ389dSn
import org.rut.util.algorithm.support.ImprovedMergeSort; kqyY:J
import org.rut.util.algorithm.support.ImprovedQuickSort; Jlzhn#5c-
import org.rut.util.algorithm.support.InsertSort; }/=VnCfU
import org.rut.util.algorithm.support.MergeSort; NZl0sX.:
import org.rut.util.algorithm.support.QuickSort; ur'A;B
import org.rut.util.algorithm.support.SelectionSort; GUK/Xiu
import org.rut.util.algorithm.support.ShellSort; ]!f=b\-Av
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/** A_[65'*b
* @author treeroot =.uE(L`]NA
* @since 2006-2-2 }NUP[%
* @version 1.0 8T%z{A1T
*/ old}}>_
public class SortUtil { +pE-Yn`YS
public final static int INSERT = 1; hWUZn``U$|
public final static int BUBBLE = 2; #bGt%*Re p
public final static int SELECTION = 3; SDot0`s>
public final static int SHELL = 4; Uzc`,iV$
public final static int QUICK = 5; rod{77
public final static int IMPROVED_QUICK = 6; FuD$jsEw
public final static int MERGE = 7; kweypIB
public final static int IMPROVED_MERGE = 8; {RzlmDStV
public final static int HEAP = 9; <$UY{"?
O|8p #
public static void sort(int[] data) { Y+D#Dv |
sort(data, IMPROVED_QUICK); Kj'uTEM
} s Ce{V*ua
private static String[] name={ HK}C<gg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a.q=
}; SL*B `P~{
#"TTI vd0
private static Sort[] impl=new Sort[]{ En[cg
new InsertSort(), *t~(_j
new BubbleSort(), fHM<6i<C
new SelectionSort(), )O_Y(^+ $
new ShellSort(), :#+VH_%N
new QuickSort(), fSSDOH!U,
new ImprovedQuickSort(), +4)Kc9S#
new MergeSort(), r;9F@/
new ImprovedMergeSort(), h'wI/Z_'
new HeapSort() %POoyH@D}
}; &u.t5m7(
]A'E61t<n
public static String toString(int algorithm){ B[8
return name[algorithm-1]; snX5mD
} z0c_&@uj*
8)T.[AP
public static void sort(int[] data, int algorithm) { ;Lz96R@}
impl[algorithm-1].sort(data); @c5TSHSL.
} LA1UD+S
n&&X{Rl
public static interface Sort { o@"H3 gz
public void sort(int[] data); G!wFG-Y}
} X+iUT
b^rPw@
public static void swap(int[] data, int i, int j) { _%Jqyc"-
int temp = data; 0p8(Q
data = data[j]; u3kZOsG
data[j] = temp; hv8V=Z'Q
} - wCfwC
} 8nNRn[oS