[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; 1=/MT#d^?
} 5w,YBUp
int i1=l; w7`@=kVx
int i2=mid+1; p)[BB6E
for(int cur=l;cur<=r;cur++){ "$,}|T?Y`
if(i1==mid+1) NBbY## w0
data[cur]=temp[i2++]; @tjZvRtZ
else if(i2>r) 2os6c te
data[cur]=temp[i1++]; )z*$`?)k
else if(temp[i1] data[cur]=temp[i1++]; 7Y @=x#
else )l[7;ZIw$
data[cur]=temp[i2++]; Vbqm]2o&
} 1=o(sIeA
} 3' :[i2[
Bgo"JNM
} 79c9+
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改进后的归并排序: LF-+5`
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package org.rut.util.algorithm.support; +hKPOFa'
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import org.rut.util.algorithm.SortUtil; 8^f[-^%
pn_gq~5ng
/** :[X}.]"
* @author treeroot iK6<^,]'
* @since 2006-2-2 z}b U\3!
* @version 1.0 zOdasEd8!
*/ 5f^`4pT
public class ImprovedMergeSort implements SortUtil.Sort { fB @pwmu
1!v >I"]
private static final int THRESHOLD = 10; ]5)&36
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/* ?GMeA}j
* (non-Javadoc) zx]M/=7,V#
* ezq q@t9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N:gstp
*/ ]TTJrC:
public void sort(int[] data) { [(e`b
int[] temp=new int[data.length]; Jk6/i;4|
mergeSort(data,temp,0,data.length-1); dn.c#,Y
} U}vtVvx
(EF$^FYPK
private void mergeSort(int[] data, int[] temp, int l, int r) { ~V$5m j
int i, j, k; -WHwz m
int mid = (l + r) / 2; \<MTY:
if (l == r) a\.OL}"
return; yn ?U7`V
if ((mid - l) >= THRESHOLD) ywsz"/=@
mergeSort(data, temp, l, mid); BUy}Rn
else E/ed0'|m
insertSort(data, l, mid - l + 1); XGrxzO|{
if ((r - mid) > THRESHOLD) Rp@}9qijb
mergeSort(data, temp, mid + 1, r); k f K"i
else ZsK'</7
insertSort(data, mid + 1, r - mid); r{:la56Xd
0\ytBxL
for (i = l; i <= mid; i++) { bl=*3qB
temp = data; MgK(gL/&[
} B& f~.UH
for (j = 1; j <= r - mid; j++) { zKAyfn.A
temp[r - j + 1] = data[j + mid]; =B{$U~}
} 5A=xFj{
int a = temp[l]; !E>3N:
int b = temp[r]; "F.J>QBd
for (i = l, j = r, k = l; k <= r; k++) { ^MWW,`
if (a < b) { {Z~VO
data[k] = temp[i++]; 9787uj]Y}H
a = temp; %!hA\S
} else { 7QL) }b.H
data[k] = temp[j--]; >5@ 0lYhH
b = temp[j]; qP.VK?jF|
} );.<Yf{c
} D]>86&
} T6?d`i i1
6V_5BpXt
/** Pc:'>,3!V3
* @param data t-ReT_D|;
* @param l &)'kX
* @param i '`A67bdq)
*/ K/LaA4
private void insertSort(int[] data, int start, int len) { =VI`CBQ/Um
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >a] s
} H-y-7PW*~
} oO9iB:w
} PL B=%[
} ++RmaZ
w\Eve:
堆排序： Erymx$@P
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package org.rut.util.algorithm.support; g8@i_
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import org.rut.util.algorithm.SortUtil; D `3yv R
R8Ei:f}
/** $,@+Ua
* @author treeroot =|t1eSzc
* @since 2006-2-2 JU`'?b
* @version 1.0 XXdMppoR
*/ 9*Mg<P"
public class HeapSort implements SortUtil.Sort{ eMMiSO!3
B!C32~[
/* (non-Javadoc) 3G0\i!*t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [8g\pPQ
*/ !~DkA7i55
public void sort(int[] data) { i*rv_G|(Zj
MaxHeap h=new MaxHeap(); o\YdL2:X
h.init(data); *} 4;1OVT
for(int i=0;i h.remove(); 8i 'jkyInT
System.arraycopy(h.queue,1,data,0,data.length); leqSS}KU+
} CMf~Yv
"+"dALX{3K
private static class MaxHeap{ H_$f v_
=:}DD0o*
void init(int[] data){ 97 X60<
this.queue=new int[data.length+1]; 6B P%&RL
for(int i=0;i queue[++size]=data; ~bQ:gArk
fixUp(size); 8k}CR)3@C
} X~VZ61vNu
} >R!I
:<G+)hIK
private int size=0; TgG)btQ
uPD_s[
private int[] queue; \nt'I;f
WED7]2>
public int get() { gM]/Y6*$b
return queue[1]; \FX3=WW
} xo3)dsX
X7!A(q+h
public void remove() { *VAi!3Rx;
SortUtil.swap(queue,1,size--); "@bk$o=
fixDown(1); G`K7P`m
} os+wTUR^
file://fixdown ,tc]E45
private void fixDown(int k) { obkv ]~
int j; a'.=.eDQ
while ((j = k << 1) <= size) { \shoLp
if (j < size %26amp;%26amp; queue[j] j++; 5%$kAJZC-
if (queue[k]>queue[j]) file://不用交换 <t2?Oii;
break; :7]R2JP
SortUtil.swap(queue,j,k); BU .G~0
k = j; *\5H\s9<
} blS4AQ?b^
} _e^V\O>
private void fixUp(int k) { C'"6@-~
while (k > 1) { 5{=MUU=
int j = k >> 1; gU$3Y#R
if (queue[j]>queue[k]) Z.19v>-c
break; SaScP
SortUtil.swap(queue,j,k); rV{e[fGd
k = j; N1+]3kt ~
} N1t:i? q&
} _dY}86{
Hh/#pGf2
} -Euy5Y
DGUU1vA
} g[Y$SgJ
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SortUtil： 8XE0 p7
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package org.rut.util.algorithm; /FXfu
eS+LFS7*k
import org.rut.util.algorithm.support.BubbleSort; =swcmab;
import org.rut.util.algorithm.support.HeapSort; Lf<9GYNy>`
import org.rut.util.algorithm.support.ImprovedMergeSort; 7m$/.\5
import org.rut.util.algorithm.support.ImprovedQuickSort; MYm6C;o$
import org.rut.util.algorithm.support.InsertSort; aesFv)5DK
import org.rut.util.algorithm.support.MergeSort; BF#e=p
import org.rut.util.algorithm.support.QuickSort; HuClO
import org.rut.util.algorithm.support.SelectionSort; |1x,_uyQ%
import org.rut.util.algorithm.support.ShellSort; 3`I_
0<;B2ce
/** d":{a6D*d
* @author treeroot 'f!Jh<i
* @since 2006-2-2 ;bbEd'
* @version 1.0 ,1kV9_x
*/ ~-zC8._w3r
public class SortUtil { b s*Z{R
public final static int INSERT = 1; (/BkwbJyE
public final static int BUBBLE = 2; Ke!O^zP92
public final static int SELECTION = 3; Tj#XsD?J
public final static int SHELL = 4; <;K/Yv'{r
public final static int QUICK = 5; EORAx
public final static int IMPROVED_QUICK = 6; 8t"DQ Y-R
public final static int MERGE = 7; /otgFQ_
public final static int IMPROVED_MERGE = 8; [J#(k`@
public final static int HEAP = 9; w,$17+]3
@ vudeaup
public static void sort(int[] data) { :zoX Xo
sort(data, IMPROVED_QUICK); Plv+mb
} O@$i
private static String[] name={ cke[SUH,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" woKdI)f$
}; e76)z;'
)}8%Gs4C
private static Sort[] impl=new Sort[]{ r~t7Z+PXF
new InsertSort(), W_EN4p~J
new BubbleSort(), )$i3j 1[;
new SelectionSort(), D.}b<kDD
new ShellSort(), lX7^LB
new QuickSort(), &3. 8i%
new ImprovedQuickSort(), NI)nf;C
new MergeSort(), %mJ)pMV
new ImprovedMergeSort(), T@XiG:b7
new HeapSort() ZG|T-r;~
}; c9'b`#'
Ws@s(5r
public static String toString(int algorithm){ m9S5;kB]
return name[algorithm-1]; gS 3&,^
} 8a{gEZT,
6P8X)3CE<T
public static void sort(int[] data, int algorithm) { $+j)
impl[algorithm-1].sort(data); a{=~#u8
} 6]*qx5m`<l
}"v"^5
public static interface Sort { >XN&QVE
public void sort(int[] data); j3U8@tuG
} AnQRSB (
#e[5O|V~
public static void swap(int[] data, int i, int j) { ho. a93
int temp = data; 4{=Em5`HbO
data = data[j]; @nK08Kj-
data[j] = temp; xOH@V4z:
} ^EZoP:x(oE
} e$Ej7_.#;