[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; r/w@Dh]{_
} -&^(T
int i1=l; {nWtNyJpS
int i2=mid+1; D%}o26K.C
for(int cur=l;cur<=r;cur++){ &l)v'
if(i1==mid+1) O[J+dWyp
data[cur]=temp[i2++]; Kct +QO(
else if(i2>r) d:ajD
data[cur]=temp[i1++]; W_lNvzag
else if(temp[i1] data[cur]=temp[i1++]; o=5uM
else w6Ny>(T/
data[cur]=temp[i2++]; 0L-g'^nn
} k3eN;3#&
} zm.sX~j
U*l>8
} Xm+3`$<
` R-np_
改进后的归并排序: Rla*hc~
IWd*"\L
package org.rut.util.algorithm.support; %&S]cEw
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import org.rut.util.algorithm.SortUtil; /9gMcn9EB
JVCgYY({KQ
/** !I P*
* @author treeroot I!@`_Q9N
* @since 2006-2-2 (8/xSOZ[
* @version 1.0 |W[rywxx
*/ J@-9{<
public class ImprovedMergeSort implements SortUtil.Sort { @Kb~!y@G
}tq9 /\
private static final int THRESHOLD = 10; rkXSygb
X0L{#U
/* O
* (non-Javadoc) U5s]dUs (
* 'GT`%ck
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )^xmy6k
*/ 1a4$. {
public void sort(int[] data) { !0_Y@>2
int[] temp=new int[data.length]; 6!m#_z8qG3
mergeSort(data,temp,0,data.length-1); f2XD^:Gc
} ~UFsiVpL
wYM{x!D
private void mergeSort(int[] data, int[] temp, int l, int r) { J~6*d,Ry`
int i, j, k; :36^^Wm
int mid = (l + r) / 2; <o`]wOrl
if (l == r) N_}Im>;!
return; !I$RE?7eY
if ((mid - l) >= THRESHOLD) NsK>UJ'
mergeSort(data, temp, l, mid); nr6U> KR^
else eHIC'b.
insertSort(data, l, mid - l + 1); <<6#Uz.1
if ((r - mid) > THRESHOLD) WJ,ON-v
mergeSort(data, temp, mid + 1, r); =,9'O/br
else nQMN2jM
insertSort(data, mid + 1, r - mid); s47"JKf"
ywBo9|%T
for (i = l; i <= mid; i++) { l;i u`
temp = data; breVTY7 S
} DSa92:M}
for (j = 1; j <= r - mid; j++) { I<f M8t.Y>
temp[r - j + 1] = data[j + mid]; &KwtvUN{
} KLB?GN?Pb
int a = temp[l]; ax}Xsk_
int b = temp[r]; ]P5u:~U
for (i = l, j = r, k = l; k <= r; k++) { BGOI
if (a < b) { YkbLf#2AE|
data[k] = temp[i++]; NyNu1V$
a = temp; $x0F(|wxt
} else { W;yZ$k#q}(
data[k] = temp[j--]; ;B@l0)7(x
b = temp[j]; R'U(]&e.j
} EwsJa3 `
} <ZEll[0L
} CdjGYS
wVX0!y6
/** ^|z>NV5>
* @param data Ac%K+Pgk.
* @param l vN+!l3O
* @param i UNHHzTsr?
*/ ponvi42u
private void insertSort(int[] data, int start, int len) { (d\bSo$]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;anG F0x
} ,@MPzpH
} %hh8\5l.:
} ~CscctD{;
} ?U[AE -*
W@Wh@eSb;
堆排序： 6OUjc
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package org.rut.util.algorithm.support; [)?3Dp|MH
G@2M&0'
import org.rut.util.algorithm.SortUtil; (w fZ!
=XB)sC%
/** ce\-oT
* @author treeroot J.(_c' r
* @since 2006-2-2 ,GlK_-6>
* @version 1.0 f #14%?/
*/ Dc2eY.
public class HeapSort implements SortUtil.Sort{ bzS [X
_BV:i:z
/* (non-Javadoc) s.R(3}/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dE~ns ,+
*/ OX2\H
public void sort(int[] data) { gsAO<Fy
MaxHeap h=new MaxHeap(); ,\i q'}i
h.init(data); TgLlmU*qMU
for(int i=0;i h.remove(); 8jk*N
System.arraycopy(h.queue,1,data,0,data.length); kp|reKM/
} 5;*C0m2%i
k-/$8C
private static class MaxHeap{ uVocl,?.L
y{<7OTA)
void init(int[] data){ W*2SlS7
this.queue=new int[data.length+1]; 9"e!0Q40
for(int i=0;i queue[++size]=data; Y|L57F
fixUp(size); zc#`qa:0
} &}ow-u9c3
} /uWON4
YL+W4ld
private int size=0; RPu-E9g@
`:&{/|uP7
private int[] queue; YH9BJ
KK}&4^q
public int get() { B5hGzplS
return queue[1]; -JK+{<
} ()Z$j,2
]cD!~nJ
public void remove() { l)Hu.1~
SortUtil.swap(queue,1,size--); *!/9?M{p
fixDown(1); ScD9Ct*):C
} n9%rjS$
file://fixdown -Y6JU
private void fixDown(int k) { ,yoT3_%P
int j; 1,E/So
while ((j = k << 1) <= size) { x8^Dhpr6
if (j < size %26amp;%26amp; queue[j] j++; 9bB~r[k
if (queue[k]>queue[j]) file://不用交换 &}oDSD H^,
break; vzU%5,
SortUtil.swap(queue,j,k); [,c>-jA5
k = j; NTC,Vr\A
} S/4kfsN
} !PgYn
private void fixUp(int k) { oUqNA|l T
while (k > 1) { ;AaF;zPV
int j = k >> 1; \n5,!,A
if (queue[j]>queue[k]) \Z$*8z=
break; n~h%K7 c
SortUtil.swap(queue,j,k); @AwH?7(b
k = j; |7argk+
} j'W)Nyw$[
} _>*"6
KLk37IY2\
} JGtdbD?Fw
'oTF$3n
} v{9eEk1
})":F
SortUtil： c09uCito
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package org.rut.util.algorithm; C-(&zwj?!
b(yY.L=K
import org.rut.util.algorithm.support.BubbleSort; ]T$~a8
import org.rut.util.algorithm.support.HeapSort; /1Eg6hf9B
import org.rut.util.algorithm.support.ImprovedMergeSort; 8WvT0q>]
import org.rut.util.algorithm.support.ImprovedQuickSort; @!S5FOXipZ
import org.rut.util.algorithm.support.InsertSort; |qBo*OcO
import org.rut.util.algorithm.support.MergeSort; ~9{.!7KPc
import org.rut.util.algorithm.support.QuickSort; Vrnx#j-U
import org.rut.util.algorithm.support.SelectionSort; uJ[dO}
import org.rut.util.algorithm.support.ShellSort; 4x:fOhtP
?h{&
/** ;RR)C@n1
* @author treeroot 8WAg{lVs
* @since 2006-2-2 M*x_1h5n
* @version 1.0 'F@'4[uda
*/ Mqq7;w@(J
public class SortUtil { OlP#|x*
public final static int INSERT = 1; }} IvZG&
public final static int BUBBLE = 2; # RtrHm
public final static int SELECTION = 3; PKP(:3|
public final static int SHELL = 4; xd*kNY
public final static int QUICK = 5; ]8RcZn
public final static int IMPROVED_QUICK = 6; {h2D}F
public final static int MERGE = 7; J~==<?j:
public final static int IMPROVED_MERGE = 8; TY?Fs-
public final static int HEAP = 9; +=||c\'
oOuWgr]0
public static void sort(int[] data) { u~K4fP
sort(data, IMPROVED_QUICK); 7&X^y+bMe6
} 9N9;EY-U
private static String[] name={ =KX:&GU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NK#f Gz*,(
}; k?_Miqr
hE>Mo$Q(
private static Sort[] impl=new Sort[]{ |[*b[O 1W
new InsertSort(), B$fL);l-
new BubbleSort(), 1e}wDMU(
new SelectionSort(), #{0c01JZ
new ShellSort(), RJ0w3T]7
new QuickSort(), wqw$6"~
new ImprovedQuickSort(), 5@i/4%S
new MergeSort(), %zWtPxAf
new ImprovedMergeSort(), rwU[dqBRhc
new HeapSort() .uhP(
}; n#4Ra+dD
+~7@K{6q-
public static String toString(int algorithm){ #SO9e.yhI
return name[algorithm-1]; y0Ag px
} K(hqDif*6
R#oXQaBJ
public static void sort(int[] data, int algorithm) { 8NpQ"0X
impl[algorithm-1].sort(data); :=-h'<D
} }v`5
BwbvZfV|
public static interface Sort { Yk:\oM
public void sort(int[] data); 4\t9(_
} daaurT
p 5P<3(
public static void swap(int[] data, int i, int j) { Z(Xu>ap
int temp = data; 5=l Ava#
data = data[j]; [&e}@!8O`
data[j] = temp; oM J5;
} #*5A]"k
} n:HF&j4C,