[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; 2'U+QK@
} wGLSei-s
int i1=l; CbW>yr
int i2=mid+1; uz;zmK
for(int cur=l;cur<=r;cur++){ }'u0Q6Obj
if(i1==mid+1) wNm1H[{
data[cur]=temp[i2++]; e| Sw+fhy<
else if(i2>r) 1ir~WFP
data[cur]=temp[i1++]; #Y<QEGb(
else if(temp[i1] data[cur]=temp[i1++]; zBjbH=
else |V-)3#c
data[cur]=temp[i2++]; PblO?@~O
} ;&9wG`
} %X -G(Z
}rA _4%
} FR^(1+lx&
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改进后的归并排序: ]k)h<)nY
v43FU3
package org.rut.util.algorithm.support; :{=2ih-}
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import org.rut.util.algorithm.SortUtil; R>B4v+b
K<E|29t^k
/** -'Oq.$Qq
* @author treeroot N$! Vm(S
* @since 2006-2-2 z8JdA%YBM
* @version 1.0 j|owU
*/ hZtJ LY
public class ImprovedMergeSort implements SortUtil.Sort { 1X-fiQJe
@+&QNI06S
private static final int THRESHOLD = 10; C^ 1;r9
<IwfiI3y
/* %Z-B{I(
* (non-Javadoc) |5g1D^b]s^
* o2_mcJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Z/aB*aVa^
*/ iM_Zn!|@\
public void sort(int[] data) { :O9i:Xq[QW
int[] temp=new int[data.length]; 9B9:lR
mergeSort(data,temp,0,data.length-1); 'Ivr=-
} Yq0jw&v
s#>``E!
private void mergeSort(int[] data, int[] temp, int l, int r) { v]@n'!
int i, j, k; k:DAko}
int mid = (l + r) / 2; GF17oMi
if (l == r) ;%mYsQ
return; 8m*uT< 5D
if ((mid - l) >= THRESHOLD) ->*'Y;t4
mergeSort(data, temp, l, mid); \QP1jB
else 8/T,.<5
insertSort(data, l, mid - l + 1); l'FNp
if ((r - mid) > THRESHOLD) ^"{txd?6
mergeSort(data, temp, mid + 1, r); j-(k`w\
else zC|y"PTw
insertSort(data, mid + 1, r - mid); (aX6jdvo
xB|?}uS-
for (i = l; i <= mid; i++) { xC YL3hl
temp = data; |#J!oBS!
} JG*Lc@Q
for (j = 1; j <= r - mid; j++) { M?.[Rr-uw
temp[r - j + 1] = data[j + mid]; r8TNl@Z
} '[`pU>9
int a = temp[l]; {wCzm
int b = temp[r]; cUD}SOW
for (i = l, j = r, k = l; k <= r; k++) { ";*Iwd*V
if (a < b) { 't#E-+o
data[k] = temp[i++]; k*k 9hv?
a = temp; |YWX.-aeo
} else { D)GD9MJ
data[k] = temp[j--]; s^>1rV]=(`
b = temp[j]; $[M5Vv
} YdF\*tZ
} ~O~R,h>
} [*z`p;n2D
o}6d[G>
/** VhX~sJ1%Gp
* @param data o\-:
* @param l :FWo,fq?:{
* @param i ZuVes?&j
*/ a[A*9%a
private void insertSort(int[] data, int start, int len) { X%]m^[6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); We:b1sZR
} _su$]s
} gF8n{b
} <Kt;uu>
} RJ~I?{yR0[
]x^v;r~
堆排序： MClvmv^
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package org.rut.util.algorithm.support; eG\`SKx_
9xM7X?
import org.rut.util.algorithm.SortUtil; (@ixV$Y
N3?@CM^hHw
/** $^louas&
* @author treeroot B,avI&7M;S
* @since 2006-2-2 Jwe9L^gL
* @version 1.0 KV]8o'
*/ nEbJ,#>Z
public class HeapSort implements SortUtil.Sort{ wC>Xu.Z:
rBrJTF:.
/* (non-Javadoc) HRF;qR9v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q<>aZ|r
*/ >q^l
public void sort(int[] data) { vY'E+M"+@
MaxHeap h=new MaxHeap(); qgk6 \&K[
h.init(data); %eQw\o,a
for(int i=0;i h.remove(); `AcT}.u
System.arraycopy(h.queue,1,data,0,data.length); W=ar&O~}n
} 6ujePi <U
*Rj(~Q/t
private static class MaxHeap{ < (<IRCR
]q<Zc>OC
void init(int[] data){ tZqy \_G
this.queue=new int[data.length+1]; fLR\@f
for(int i=0;i queue[++size]=data; iz5WWn^
fixUp(size); tC4 7P[b
} a@}A;y'd
} %VmHw~xyF:
0 V3`rK
private int size=0; e QGhX(
_7Rp.)[&
private int[] queue; t182&gpd`
C3z#A3&J
public int get() { <j^bk"l p
return queue[1]; ?R8wmE[w
} 8oVQ:' 6
q;L~5q."E
public void remove() { ^L +@oS
SortUtil.swap(queue,1,size--); 5V"g,]'Nd
fixDown(1); :$?^ID
} v5`Q7ZZ
file://fixdown m[%*O#_
private void fixDown(int k) { rA6lyzJ
int j; A0`#n|(Ad!
while ((j = k << 1) <= size) { Fg<rz&MR
if (j < size %26amp;%26amp; queue[j] j++; OD`?BM
if (queue[k]>queue[j]) file://不用交换 v\3}5v%YI
break; 3r]N\c
SortUtil.swap(queue,j,k); - }2AXP2q
k = j; @ZTsl ?
} `/\Z{j0_
} DU=rsePWE
private void fixUp(int k) { o:8*WCiqrN
while (k > 1) { ZQ'bB5I
int j = k >> 1; r~U/t~V=D
if (queue[j]>queue[k]) Mz#<Vm4
break; +?[,{WtV
SortUtil.swap(queue,j,k); :UDT! 5FNO
k = j; 2!E@Gbhm5
} E"[h20`\/
} f%JC;Y
K6X}d,g
} I|oS`iLl$
l1MVC@'pvP
} y1@*)| r
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SortUtil： oP 4z>
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package org.rut.util.algorithm; ERQc1G]3Dd
j!;y!g
import org.rut.util.algorithm.support.BubbleSort; :^[HDI-[2
import org.rut.util.algorithm.support.HeapSort; Kfl#78$d
import org.rut.util.algorithm.support.ImprovedMergeSort; Ccx1#^`
import org.rut.util.algorithm.support.ImprovedQuickSort; ?N/6m
import org.rut.util.algorithm.support.InsertSort; b w2KD7
import org.rut.util.algorithm.support.MergeSort; jDwLzvMO
import org.rut.util.algorithm.support.QuickSort; <JNiW8 PG
import org.rut.util.algorithm.support.SelectionSort; gvl3NQQ%t
import org.rut.util.algorithm.support.ShellSort; *%,{<C,Y
do>,ELS+m
/** 4IH,:w=ofN
* @author treeroot l=.h]]`;
* @since 2006-2-2 j|/4V
* @version 1.0 @;K-@*k3
*/ s%c>Ge
public class SortUtil { U81--'@y
public final static int INSERT = 1; 4Cn% h)w
public final static int BUBBLE = 2; m}oqs0xx
public final static int SELECTION = 3; GZ@`}7b}
public final static int SHELL = 4; J jp)%c#_
public final static int QUICK = 5; yv2N5IQ>{V
public final static int IMPROVED_QUICK = 6; ?cRGdLP'D
public final static int MERGE = 7; ejjL>'G/|%
public final static int IMPROVED_MERGE = 8; 1#m'u5L
public final static int HEAP = 9; |1[3RnGS
UBZ37P
public static void sort(int[] data) { g{d(4=FM
sort(data, IMPROVED_QUICK); 6+s10?
} wTw)GV4
private static String[] name={ <*'%Xgm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $wBF'|eU
}; znxP.=GB
1q7Y,whp
private static Sort[] impl=new Sort[]{ 9z0G0QW[
new InsertSort(), ~aZy52H_#.
new BubbleSort(), ooW;s<6
new SelectionSort(), VsJ4sb7
new ShellSort(), pdFa]
new QuickSort(), eGF+@)K1"
new ImprovedQuickSort(), >&g^ `
new MergeSort(), ^KRe(
new ImprovedMergeSort(), _9<nM48+t
new HeapSort() V@C8HTg
}; k/;%{@G)
6J""gyK.
public static String toString(int algorithm){ )5NjwLs
return name[algorithm-1]; tzn+ M0'
} g,61'5\
:kb2v1{\
public static void sort(int[] data, int algorithm) { 4[VW~x07
impl[algorithm-1].sort(data); EpsjaOmAF
} ,^K}_z\9f
)A1u uW (
public static interface Sort { ??u*qO:p
public void sort(int[] data); ](2\w9i%
} L)qDtXd4
$]`rWSYtv`
public static void swap(int[] data, int i, int j) { R|u2ga~
int temp = data; HZJ)q`1E
data = data[j]; %UXmWXF4$
data[j] = temp; P]mJ01@'
} TEN~3 Ef#
} }gR!]Cs)^