[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; Xb2.t^ ]f
} jG["#5<?
int i1=l; tE WolO[\
int i2=mid+1; ,s`4k?y
for(int cur=l;cur<=r;cur++){ #Oi{7~
if(i1==mid+1) sWv!ig_
data[cur]=temp[i2++]; 7Fzj&!>ti
else if(i2>r) `G:I|=#w
data[cur]=temp[i1++]; +$$5Cv5#<&
else if(temp[i1] data[cur]=temp[i1++]; =*{Ii]D
else %E2V$l0
data[cur]=temp[i2++]; bXi(]5
} ;a 6Z=LB
} ek1<9"y
RQYD#4|
} sA2esA@C<o
~JHEr48
改进后的归并排序: moRo>bvN~
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package org.rut.util.algorithm.support; |[!7^tU*
_%G;^ b
import org.rut.util.algorithm.SortUtil; |j=Pj)5J
zZ94_8b
/** I%l2_hs0V
* @author treeroot CsEU:v
* @since 2006-2-2 jo' V.]\
* @version 1.0 $8}'h
*/ QB3er]y0%
public class ImprovedMergeSort implements SortUtil.Sort { Q^*4FH!W
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private static final int THRESHOLD = 10; XT?wCb41R
Jl<pWjkZZ
/* yz"hU
* (non-Javadoc) T:SqENV
* E24j(>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p8FXlTk
*/ vNju|=Lo
public void sort(int[] data) { qu&p)*M5
int[] temp=new int[data.length]; ]k8f1F
mergeSort(data,temp,0,data.length-1); B(f_~]
} .03Rp5+v
1Tr%lO5?6
private void mergeSort(int[] data, int[] temp, int l, int r) { ^B1$|C D,
int i, j, k; gVrfZ&XF84
int mid = (l + r) / 2; rZWs-]s6t
if (l == r) uPxJwWXO
return; [=",R&uD$
if ((mid - l) >= THRESHOLD) AiB]A}
mergeSort(data, temp, l, mid); >.I9S{7
else dL_9/f4
insertSort(data, l, mid - l + 1); I E{:{b\
if ((r - mid) > THRESHOLD) jYvl-2A'
mergeSort(data, temp, mid + 1, r); 4;Vi@(G)
else w ^?#xU1.i
insertSort(data, mid + 1, r - mid); j+rY
0 vYG#S
for (i = l; i <= mid; i++) { i[ >U#5
temp = data; v^)B[e!
} @AM11v\:
for (j = 1; j <= r - mid; j++) { " %qr*|
temp[r - j + 1] = data[j + mid]; rNurzag
} 1xu~@v60
int a = temp[l]; &er,Wyc(
int b = temp[r]; 3y,2RernK
for (i = l, j = r, k = l; k <= r; k++) { {3.n!7+
if (a < b) { o)>iHzR</
data[k] = temp[i++]; IRueq @4
a = temp; z~==7:Os
} else { .6C6ZUB;
data[k] = temp[j--]; S^;;\0#NK
b = temp[j]; G&@dJ &B
} #6v357-5
} ~y?Nn8+&f
} )EQz9
CyS%11L
/** Pouo# 5
* @param data 8};kNW^2m
* @param l _RUL$Ds
* @param i ,k=8|=aF
*/ _C(fz CK
private void insertSort(int[] data, int start, int len) { 3l,-n|x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QnP?j&
} 4w#2m>.
} 2g~ @99`
} Qc)i?Z'6
} ;obOr~Jx'5
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堆排序： ?qi~8.<w
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package org.rut.util.algorithm.support; *^Ges;5$"
S,ea[$_
import org.rut.util.algorithm.SortUtil; UCK;?]
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/** v|\#wrCT?
* @author treeroot )Tp"l"(G
* @since 2006-2-2 ?QzL#iO}h
* @version 1.0 dP+wcl4
*/ lS#:u-k
public class HeapSort implements SortUtil.Sort{ +RJKJ:W
?|/K(}
/* (non-Javadoc) ^_g%c&H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u$C\#y7
*/ \Vroz=IT:
public void sort(int[] data) { a/J Mg
MaxHeap h=new MaxHeap(); M_Q`9
h.init(data); aL*MCgb'
for(int i=0;i h.remove(); |JF,n~n
System.arraycopy(h.queue,1,data,0,data.length); Y]KHCY
} LU+SuVm
8Iu6r}k?~`
private static class MaxHeap{ A%?c1`ZxF
3)ox8,{%}
void init(int[] data){ Y0krFhL'x0
this.queue=new int[data.length+1]; 4H%#Sn#L^!
for(int i=0;i queue[++size]=data; CHZ/@gc
fixUp(size); tpEy-"D&
} c0o Z7)*}
} OylUuYy~j
gd]S;<Jh
private int size=0; ]'[:QGr
^|p D(v
private int[] queue; yP"}(!~m
q~ ZUtF
public int get() { sR>>l3H
return queue[1]; YTZ :D/
} m"/..&'GC
Y'~O_coG
public void remove() { !-^oU"
SortUtil.swap(queue,1,size--); > ^zNKgSQ
fixDown(1); v]EZYEXFL)
} hU-FSdR
file://fixdown Hzm_o>^KC
private void fixDown(int k) { p+|8(w9A${
int j; &g&,~Y/z;
while ((j = k << 1) <= size) { L(K 5f7\
if (j < size %26amp;%26amp; queue[j] j++; 2wB*c9~
if (queue[k]>queue[j]) file://不用交换 6xtgnl#T
break; 9x!kvB6
SortUtil.swap(queue,j,k); mj e9i
k = j; O50<h O]l
} }A@:JR+|
} &z40l['4bz
private void fixUp(int k) { A03io8D6
while (k > 1) { No6-i{HZ
int j = k >> 1; MXfyj5K
if (queue[j]>queue[k]) ><D2of|
break; bAH<h
SortUtil.swap(queue,j,k); He'VqUw_
k = j; yc?L OW0
} c`\/]
} p*42 @1,
qQ^CSn98J
} BRM `/s
'_4apyq|
} ,M?8s2?
g$#A'Du
SortUtil： ]58~b%s
Qd YYWD
package org.rut.util.algorithm; "GZ}+K*GG
1c#\CO1l
import org.rut.util.algorithm.support.BubbleSort; LKcp.i
import org.rut.util.algorithm.support.HeapSort; )'f=!'X
import org.rut.util.algorithm.support.ImprovedMergeSort; yp$jLBA
import org.rut.util.algorithm.support.ImprovedQuickSort; .rO~a.kG
import org.rut.util.algorithm.support.InsertSort; )#M$ov
import org.rut.util.algorithm.support.MergeSort; G\MeJSt*
import org.rut.util.algorithm.support.QuickSort; N}%AUm/L
import org.rut.util.algorithm.support.SelectionSort; HP_h!pvx
import org.rut.util.algorithm.support.ShellSort; 7glf?oE
+g7]ga
/** R[l`# I
* @author treeroot ~!mY0odH
* @since 2006-2-2 ibZ[U p?
* @version 1.0 KzV|::S^
*/ aW dI
public class SortUtil { >SvS(N{
public final static int INSERT = 1; h%u!UHA
public final static int BUBBLE = 2; 2>^(&95M
public final static int SELECTION = 3; ,N,@9p
public final static int SHELL = 4; mD% qDKI
public final static int QUICK = 5; c-&Q_lB
public final static int IMPROVED_QUICK = 6; w=!xTA
public final static int MERGE = 7; !9HWx_,|Z
public final static int IMPROVED_MERGE = 8; l lcq~*zz
public final static int HEAP = 9; _u6NaB
&L?]w=*
public static void sort(int[] data) { J5jI/P
sort(data, IMPROVED_QUICK); (D?4*9=
} b|k^
private static String[] name={ ;:oJFI#;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lz_.m
}; MtPdpm6\
DVwB}W~
private static Sort[] impl=new Sort[]{ A#?Cts,M
new InsertSort(), `5oXf
new BubbleSort(), gV9bt~
new SelectionSort(), zmD7]?|
new ShellSort(), Hp ;$fQ
new QuickSort(), K/Y"oQ2
new ImprovedQuickSort(), `_1fa7,z
new MergeSort(), 5`e;l$ M`
new ImprovedMergeSort(), r7V !M1
new HeapSort() o/a2n<4
}; |%|Vlu
*'H\`@L
public static String toString(int algorithm){ )f^^hEIS
return name[algorithm-1]; tUOY`]0
} ;<T,W[3J
3:#6/@wQ
public static void sort(int[] data, int algorithm) { 0Ba]Zo Z
impl[algorithm-1].sort(data); `ItoL7bi
} 60ciI,_`
9* 3;v;F
public static interface Sort { +!ljq~%
public void sort(int[] data); HrZX~JnTmf
} ^C~R)M:C
^jRX6
public static void swap(int[] data, int i, int j) { "Vl4=W)u
int temp = data; -'D~nd${
data = data[j]; Q1yXdw
data[j] = temp; r: >RH,
} .w{Y3,dd>
} s3@mk\?qMe