[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; 7X(]r1-+\
} :OCuxSc%5
int i1=l; n#Roz5/U
int i2=mid+1; (:QQ7xc{}
for(int cur=l;cur<=r;cur++){ aLi_Hrb9
if(i1==mid+1) Z~c'h
data[cur]=temp[i2++]; vLuQe0l{
else if(i2>r) ;YDF*~9u
data[cur]=temp[i1++]; hyiMOa
else if(temp[i1] data[cur]=temp[i1++]; v9U(sEDq
else 8/"|VE DOr
data[cur]=temp[i2++]; IY6_JGe_w
} abeSkWUL(
} DYlvxF`
T-C#xmY(
} -l H>8+
| ",[C3Jg
改进后的归并排序: >&QH{!(
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package org.rut.util.algorithm.support; p{q!jm~Nq
*ldMr{s<R
import org.rut.util.algorithm.SortUtil; U5!f++
q9Sz7_K
/** -Zg @D(pF
* @author treeroot 1?|6odc
* @since 2006-2-2 b$O_L4CP
* @version 1.0 vt@Us\fI
*/ `t0f L\T
public class ImprovedMergeSort implements SortUtil.Sort { Q)`gPX3F
uxyTu2L7
private static final int THRESHOLD = 10; H'{?aaK|t
}m%?&c
/* `QdQ?9x{F
* (non-Javadoc) rAWl0y_m
* +RV-VrV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xs!g{~V{
*/ 1Xr"h:U_X
public void sort(int[] data) { T_?nd T2
int[] temp=new int[data.length]; QZ3(u<f
mergeSort(data,temp,0,data.length-1); 99"[b
} hNnX-^J<o
8i;)|z7
private void mergeSort(int[] data, int[] temp, int l, int r) { yW^IN8fm
int i, j, k; {R-82%X
int mid = (l + r) / 2; kt{C7qpD
if (l == r) ZQ~myqx,+L
return; Zknewv*sS4
if ((mid - l) >= THRESHOLD) C$LRY~\
mergeSort(data, temp, l, mid); !I5~))E
else RP,:[}mPl
insertSort(data, l, mid - l + 1); knOnUU
if ((r - mid) > THRESHOLD) ,p!B"# ot
mergeSort(data, temp, mid + 1, r); 030U7VT1
else z5`8G =A
insertSort(data, mid + 1, r - mid); EeJqszmH
zk5=Opmvh
for (i = l; i <= mid; i++) { "6N~2q,SW
temp = data; ,.jHV
} 7grt4k
for (j = 1; j <= r - mid; j++) { Bw<zc=%
temp[r - j + 1] = data[j + mid]; x}&a{;
} ]hE+$sKd
int a = temp[l]; oU0 h3
int b = temp[r]; 6I>5~?#
for (i = l, j = r, k = l; k <= r; k++) { a-5HIY5
if (a < b) { Q_aqX(ig
data[k] = temp[i++]; >u5g?yzw
a = temp; 58&{5YpS
} else { qX{X4b$
data[k] = temp[j--]; ?#m<\]S<
b = temp[j]; AL]h|)6QpC
} pSQCT
} yYToiW *
} n<?SZ^X{,/
T+WZE
/** m0j|58~
* @param data =1*%>K
* @param l hA*Z'.[
* @param i *:9 >W$0u
*/ =0h|yjnL/
private void insertSort(int[] data, int start, int len) { Y:%m;b$]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); drENkS=,
} |,;twj[?4
} b+IOh|
} i)7n c
} ]Y4q'KH
>X[|c"l.
堆排序： 1Sg|3T8bGT
f4'El2>-86
package org.rut.util.algorithm.support; v`S2M
}A1|jY)x
import org.rut.util.algorithm.SortUtil; *#lBQBH|.
@%OPy|=,{
/** mA(nyF
* @author treeroot "mPSA Z
* @since 2006-2-2 mPs%ZC
* @version 1.0 m!5HRjOO
*/ SqXy;S@
public class HeapSort implements SortUtil.Sort{ 7deAr$?Wx
|Bx||=z`
/* (non-Javadoc) eQU-&-wt0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q`S iV
*/ 1mHwYT+
public void sort(int[] data) { ofMu3$Q
MaxHeap h=new MaxHeap(); ZD5I5
h.init(data); By?nd)
for(int i=0;i h.remove(); 7~wFU*P1
System.arraycopy(h.queue,1,data,0,data.length); 5zNSEI"PY
} 5^i.;>(b
s, n^
private static class MaxHeap{ EkJVFHfh
nW|'l^&
void init(int[] data){ |}K
this.queue=new int[data.length+1]; ]}z'X!v_@
for(int i=0;i queue[++size]=data; I %|@3=Yc
fixUp(size); %cH8;5U40
} , Aq9fyC%
} ^IX%dzM
_1>SG2h{fV
private int size=0; `d7gm;ykp
@B,j;2eb
private int[] queue; o'C~~Vg).
.E+OmJwD
public int get() { "jL1.9%"
return queue[1]; tJ=3'?T_k
} #^|| ]g/N
(n=9c%w
public void remove() { !1a}| !Zn
SortUtil.swap(queue,1,size--); -$+,]t^GV
fixDown(1); j4;Du>obQ
} i@P9EU
file://fixdown 4|[<e-W
private void fixDown(int k) { U/ ?F:QD4
int j; O(VxMO
while ((j = k << 1) <= size) { }@Xh xZu
if (j < size %26amp;%26amp; queue[j] j++; +J|+es
if (queue[k]>queue[j]) file://不用交换 i[$-_
break; ]SFWt/<
SortUtil.swap(queue,j,k); pw@`}cM=
k = j; ]\A1mw-T
} w#*/y?"D
} _ XE;-weE
private void fixUp(int k) { `-VG ?J
while (k > 1) { \UQ9MX _
int j = k >> 1; ;\N79)Gk
if (queue[j]>queue[k]) /"=29sWB
break; Bk,2WtVX
SortUtil.swap(queue,j,k); r"R(}`<,
k = j; ]>5T}h
} 9%sFJ
} d9O:,DKf
cZqfz
} U+-F*$PO+
Pp,Um(
} "tqnx?pM
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SortUtil： hM?`x(P
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package org.rut.util.algorithm; *oCxof9JA
_B)s=Snx
import org.rut.util.algorithm.support.BubbleSort; 2Kjrw;
import org.rut.util.algorithm.support.HeapSort; o&~dGG4J
import org.rut.util.algorithm.support.ImprovedMergeSort; ;;:">@5
import org.rut.util.algorithm.support.ImprovedQuickSort; |2O')3p"9
import org.rut.util.algorithm.support.InsertSort; xcst<=
import org.rut.util.algorithm.support.MergeSort; Us'Cs+5XcG
import org.rut.util.algorithm.support.QuickSort; KyTuF
import org.rut.util.algorithm.support.SelectionSort; iHPUmTus--
import org.rut.util.algorithm.support.ShellSort; ~p:?QB>1]
j_p`Ng
/** lr,q{;
* @author treeroot IroPx#s:i
* @since 2006-2-2 kVd5,Qd
* @version 1.0 V\0E=M*P
*/ I!P4(3skAB
public class SortUtil { ?=<~^Lk
public final static int INSERT = 1; JnY$fs*"
public final static int BUBBLE = 2; FQ`(b3.
public final static int SELECTION = 3; Qlw>+y-i
public final static int SHELL = 4; O$^xkv5.
public final static int QUICK = 5; uQnT[\k?
public final static int IMPROVED_QUICK = 6; D93gH1z
public final static int MERGE = 7; =J](.78
public final static int IMPROVED_MERGE = 8; w8p8 ;@
public final static int HEAP = 9; GF*>~_Yr
uAUp5XP|Z
public static void sort(int[] data) { #.H}r6jqs
sort(data, IMPROVED_QUICK); |#k@U6`SG
} }AlYNEY
private static String[] name={ PQ$sOK|/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nq1 'F
}; /&r|ec5
R:M,tL-l
private static Sort[] impl=new Sort[]{ V,Q4n%h1.
new InsertSort(), 6kN:*
new BubbleSort(), 0Qnd6mb
new SelectionSort(), 49AW6H.JT
new ShellSort(), ^XG*z?Tt
new QuickSort(), `<U5z$^QTw
new ImprovedQuickSort(), ?F_)-
new MergeSort(), 1yMr~Fo
new ImprovedMergeSort(), 7VAJJv3
new HeapSort() b5<okICD
}; 22&;jpL'?
lj4o#^lC
public static String toString(int algorithm){ py @( <
return name[algorithm-1]; iG#}`
} E"6X|I n
:Wc_Utt
public static void sort(int[] data, int algorithm) { Qs%B'9")
impl[algorithm-1].sort(data); B2Z_]q$n*
} rOcg+5
MLr-, "gs
public static interface Sort { ,$N#Us(Wa
public void sort(int[] data); `XJm=/f
} "j^MB)YD
dEp7{jY1O
public static void swap(int[] data, int i, int j) { 2%]Z Kd
int temp = data; ^nNitF
data = data[j]; du_4eB
data[j] = temp; G69GoT
} XogVpkA
} rzUlO5?R=