[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; vjEDd`jYZ
} 7:4c\C0
int i1=l; m$vq%[/#
int i2=mid+1; x-%O1frc
for(int cur=l;cur<=r;cur++){ MBWoPK
if(i1==mid+1) LU6R"c11
data[cur]=temp[i2++]; (0{Dn5MH
else if(i2>r) <LbLMV
data[cur]=temp[i1++]; lC5zqyG
else if(temp[i1] data[cur]=temp[i1++]; #u&fUxM:AS
else +7.|1x;C
data[cur]=temp[i2++]; KuR]X``2
} Y@FYo>0O
} l2F#^=tp
E !kN h
} '2^}de!E
01.q9AGy
改进后的归并排序: ;Q{D]4
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package org.rut.util.algorithm.support; +XWTu!
?_eLrz4>L^
import org.rut.util.algorithm.SortUtil; @)pC3Vi^
9qap#A
/** fFJ7Y+^
* @author treeroot LUQ.=:mBR
* @since 2006-2-2 od `;XVG
* @version 1.0 7KgaXi3r
*/ EQyX!
public class ImprovedMergeSort implements SortUtil.Sort { nCYz];".
=xk>yw!O)
private static final int THRESHOLD = 10; S{^x]h|?
$}/tlA&e
/* 7Z>vQf B
* (non-Javadoc) >CvhTrPI
* ka_m Q<{9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #9GfMxH
*/ ?`RlYu
public void sort(int[] data) { /pF8S!,z
int[] temp=new int[data.length]; d+DO}=]
mergeSort(data,temp,0,data.length-1); vu( 5s
} By1Tum+I1
c7CYulm
private void mergeSort(int[] data, int[] temp, int l, int r) { Ta[2uv>
int i, j, k; lWRl
int mid = (l + r) / 2; U$2Em0HO}
if (l == r) ,7V?Kj
return; Do4hg $:40
if ((mid - l) >= THRESHOLD) kn:hxdZ
mergeSort(data, temp, l, mid); 3eY>LWx
else 'xS@cFo(
insertSort(data, l, mid - l + 1); |X@s {?
if ((r - mid) > THRESHOLD) vA6`};|
mergeSort(data, temp, mid + 1, r); ;Z*rY?v
else eg;r38
insertSort(data, mid + 1, r - mid); z}-CU GS
fr~Eb'8
for (i = l; i <= mid; i++) { O _9r-Zt^
temp = data; 2)IM<rf'^
} #?)6^uTW
for (j = 1; j <= r - mid; j++) { j \rGU){
temp[r - j + 1] = data[j + mid]; b_sasZo
} SY Bp-o
int a = temp[l]; t,YRM$P
int b = temp[r]; 6aB]&WO1@
for (i = l, j = r, k = l; k <= r; k++) { &0kr[Ik.
if (a < b) { 7c\W&ZEmb-
data[k] = temp[i++]; A.*e8a/6X
a = temp; Rxdj}xy
} else { g=mKTk
data[k] = temp[j--]; 4}C \N
b = temp[j]; L9)gN.#
} y],opG6
} vyS>3(NZ
} q:kGJxfaW
2Pb+/1*ix
/** kk5&lak2V
* @param data }"+"nf5h
* @param l e/hCYoS1n
* @param i k2eKs*WLC
*/ 'A|c\sy
private void insertSort(int[] data, int start, int len) { igL5nE=n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Rir0^XqG
} l^I?@{W
} ~Bl,_?CBr
} d>u^7:
} &&CrF~
_wXT9`|3
堆排序： }V]*FCpQ
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package org.rut.util.algorithm.support; i\lvxbp
~6=6YP
import org.rut.util.algorithm.SortUtil; !{*yWpZ:
8^EWD3N`
/** 9]N{8
* @author treeroot 0Y!"3bw|
* @since 2006-2-2 (}wPu&Is,C
* @version 1.0 t{UVX%b
*/ uKzx >\}?1
public class HeapSort implements SortUtil.Sort{ e!0xh
2MB>NM<xO
/* (non-Javadoc) ajkV"~w',|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'T^MaLK
*/ [? "hmSJ
public void sort(int[] data) { !Gnm<|.
MaxHeap h=new MaxHeap(); Lea4-Gc
h.init(data); UG44 oKB
for(int i=0;i h.remove(); .WSn Y71
System.arraycopy(h.queue,1,data,0,data.length); 41/civX>V
} @F8NN\
Pg.JI:>2Ku
private static class MaxHeap{ lZ5-lf4
^XeJZkLEB
void init(int[] data){ ^5MM<73
this.queue=new int[data.length+1]; Z:^<NdKe
for(int i=0;i queue[++size]=data; _3W .:
fixUp(size); EwcFxLa!F
} _S[@?]=`b
} FS8l}t
<VU-ja*(J
private int size=0; \X6q A-Ht
uxdB}H,
private int[] queue; E`LaO
hgYFR6VH
public int get() { ~*1Z1aZ
return queue[1]; OqsuuE
} Q`K^>L1
?VxQ&^|
public void remove() { GR(m+%Vw!
SortUtil.swap(queue,1,size--); %{'[S0@Z
fixDown(1); cq]0|\Vz
} OLF6["0Rn
file://fixdown #k<l5x`
private void fixDown(int k) { {R(/Usg!=
int j; m!zvt
while ((j = k << 1) <= size) { Jv 5l
if (j < size %26amp;%26amp; queue[j] j++; GZ<@#~1%\
if (queue[k]>queue[j]) file://不用交换 p-"wY?q
break; "r;cH53
SortUtil.swap(queue,j,k); E_30)"]
k = j; qm#?DSLap
} j/O9LygB
} .z$UNB(!M
private void fixUp(int k) { <NDV 5P
while (k > 1) { 44n41.Q]
int j = k >> 1; U1 3Lsky%
if (queue[j]>queue[k]) !1S!)#
break; Y#):1C1
SortUtil.swap(queue,j,k); })!-
k = j; 9(X~
} !<h9XccN
} L})fYVX
G,6`:l
} zZ9Ei-Q
2N-p97"g
} k^JgCC+
r#j3O}(n
SortUtil： cMtUb
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package org.rut.util.algorithm; SANbg&$
CNj |vYj
import org.rut.util.algorithm.support.BubbleSort; F*z>B >{)
import org.rut.util.algorithm.support.HeapSort; {a>JQW5=
import org.rut.util.algorithm.support.ImprovedMergeSort; >f9Q&c$R
import org.rut.util.algorithm.support.ImprovedQuickSort; CXu$0DQ(
import org.rut.util.algorithm.support.InsertSort; ,: z]15fX
import org.rut.util.algorithm.support.MergeSort; Grw[h
import org.rut.util.algorithm.support.QuickSort; 2fayQY xD
import org.rut.util.algorithm.support.SelectionSort; %26HB w=JF
import org.rut.util.algorithm.support.ShellSort; / E!6]b/
Z@m5hx&
/** aFnyhu&W'
* @author treeroot ?=?*W7
* @since 2006-2-2 \2f?)id~
* @version 1.0 ;eFV}DWW
*/ zb~;<:<
public class SortUtil { Tz:,l$
public final static int INSERT = 1; .1h\r, #
public final static int BUBBLE = 2; 4y.'O
public final static int SELECTION = 3; MjBI1|*
public final static int SHELL = 4; Vl(id_~_
public final static int QUICK = 5; b*Hk} !qH
public final static int IMPROVED_QUICK = 6; b!QRD'31'j
public final static int MERGE = 7; 7 mA3&<&q
public final static int IMPROVED_MERGE = 8; ~s?y[yy6i
public final static int HEAP = 9; Z@JTZMN_
0jXDjk5'<
public static void sort(int[] data) { qbD_
sort(data, IMPROVED_QUICK); H93ug1,
} N1>M<N03
private static String[] name={ z{NK(oW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _M>S=3w
}; cy8r}wD
GAR6nJCz
private static Sort[] impl=new Sort[]{ IAmMO[9H
new InsertSort(), RT%{M1tkS
new BubbleSort(), isnpSN"z
new SelectionSort(), C{-Dv-<A>
new ShellSort(), h^."wv
new QuickSort(), zEE:C|50
new ImprovedQuickSort(), 'L1yFv
new MergeSort(), djdSD
new ImprovedMergeSort(), D+BflI~9mP
new HeapSort() *|+$7j
}; ;]BNc"
mCI5^%*0jQ
public static String toString(int algorithm){ 'w;J)_Yc2
return name[algorithm-1]; ]G! APE
} C-Y7n5
z`J-J*R>d
public static void sort(int[] data, int algorithm) { A6;[r #C
impl[algorithm-1].sort(data); 21?>rezJ
} vXSpn71Jb
Y}\3PaUa
public static interface Sort { 527u d^:
public void sort(int[] data); 93.L887
} OtZtl*5
Tz(Dhb,
public static void swap(int[] data, int i, int j) { lP(<4mdP
int temp = data; grd fR`3
data = data[j]; #b&=CsW`
data[j] = temp; b3=XWzK5
} v9D[|4
} c)QOgXv